Eddy current sorter for non-ferrous metals capable of sorting fine metals

Abstract

A non-ferrous metal eddy current separator capable of classifying fine metals, which can improve the separation efficiency of non-ferrous metals across the entire particle size range from large particles to fine metals, is disclosed by separating magnetic materials from mixed waste, classifying the materials to be separated into multiple particle size sections according to particle size, and arranging multiple eddy current separators having different pole numbers and magnetic field strengths in parallel corresponding to each particle size section. A non-ferrous metal eddy current separator capable of classifying fine metals comprises: a frame unit; a magnetic separation unit installed in the frame unit and separating magnetic materials contained in the mixed waste by magnetic force; a particle size classification unit connected to the magnetic separation unit and classifying materials separated by magnetic materials into a plurality of particle size sections according to particle size; an eddy current separation unit connected to the particle size classification unit and arranged in parallel corresponding to each of the plurality of particle size sections, each receiving materials in each particle size section and separating non-ferrous metals by eddy currents; and a control unit that inspects the condition of non-ferrous metals separated by the plurality of eddy current separation sections and adjusts the separation conditions of the plurality of eddy current separation sections based on the inspection results. Multiple eddy current separators each have different pole numbers and magnetic field strengths depending on the size of the material to be separated in the corresponding particle size range.

Description

Technology Field

[0001] The present invention relates to a non-ferrous metal eddy current separator capable of classifying fine metals, and more specifically, to a non-ferrous metal eddy current separator capable of classifying fine metals that automatically optimizes the sorting quality. Background Technology

[0002] Generally, mixed waste generated from end-of-life vehicles, end-of-life appliances, construction waste, etc., contains various metal components such as iron, aluminum, copper, and zinc. In order to recover valuable metals from such mixed waste, a process is performed in which magnetic materials such as iron are first separated using a magnet, and then non-ferrous metals such as aluminum and copper are separated using eddy current.

[0003] The eddy current separation method is a technology that separates non-ferrous metals from non-conductive materials (plastics, glass, stones, etc.) by utilizing the repulsive force generated by eddy currents induced in conductive materials within an alternating magnetic field. Specifically, when a magnetic rotor in which permanent magnets are arranged in alternating polarity is rotated at high speed inside the head drum of a conveyor belt, eddy currents are induced in the non-ferrous metals moving along the belt, and the repulsive force caused by these eddy currents ejects the non-ferrous metals forward, thereby separating them from the non-conductive materials that fall naturally.

[0004] However, conventional eddy current separators consist of a single sorting line equipped with a single-specification magnetic rotor, which has the problem of significantly reduced sorting efficiency when the particle size range of the materials being sorted is wide. In particular, with the number of poles and magnetic field strength of the magnetic rotor optimized for materials with large particle sizes (e.g., 20 mm or more), it is difficult to induce effective eddy currents for fine materials with small particle sizes (e.g., 3 mm to 10 mm), resulting in a problem where the recovery rate of fine non-ferrous metals is significantly lower.

[0005] This is because the induction efficiency of eddy currents depends in combination on multiple parameters, such as the size of the material to be sorted, the number of poles (pole spacing) of the magnet rotor, magnetic field strength, the distance between the magnet rotor and the material to be sorted, the rotor rotation speed, and the belt feed speed. In the case of fine metals with small particle sizes, if the pole spacing is wide, the rate of change of the magnetic field is slow relative to the size of the fine metal, so sufficient eddy currents are not induced, and the influence of the distance between the magnet and the material to be sorted due to the belt thickness becomes relatively large, and the loading density of the material to be sorted per unit area increases, which may result in sorting defects due to overlapping.

[0006] In addition, conventional eddy current separators mostly operate with operating parameters such as the splitter position, belt speed, and rotor rotation speed fixed after initial setting, so they cannot actively respond to changes in the composition or condition of the material being separated, which has a problem in that the separation quality cannot be maintained consistently. Prior art literature

[0007] (Patent Document 0001) KR 10-2920165 B1 The problem to be solved

[0008] The present invention provides a non-ferrous metal eddy current separator capable of classifying fine metals, which can improve the separation efficiency of non-ferrous metals across the entire particle size range from large particles to fine metals, by separating magnetic materials from mixed waste, classifying the materials to be separated into a plurality of particle size sections according to particle size, and arranging a plurality of eddy current separators having different pole numbers and magnetic field strengths in parallel corresponding to each particle size section.

[0009] In addition, the present invention provides a non-ferrous metal eddy current separator capable of effectively separating fine non-ferrous metals in the range of 3mm to 10mm, which were difficult to separate with conventional technology, by increasing the number of poles and increasing the magnetic field strength as the particle size decreases, reducing the belt thickness, and minimizing the distance between the magnetic rotor and the object to be separated through the arrangement of a slit-forming head drum and an eccentric rotor. means of solving the problem

[0010] A non-ferrous metal eddy current separator capable of classifying fine metals according to an embodiment of the present invention for solving the above problem comprises: a frame unit; a magnetic separation unit installed on the frame unit and separating a magnetic material contained in the mixed waste by magnetic force; a particle size classification unit connected to the magnetic separation unit and classifying the material to be separated from the magnetic material into a plurality of particle size sections according to particle size; and an eddy current separation unit including a plurality of eddy current separation sections connected to the particle size classification unit, arranged in parallel corresponding to each of the plurality of particle size sections, and receiving the material to be separated in each particle size section and separating non-ferrous metals by eddy currents. and a control unit that inspects the condition of non-ferrous metals selected from the plurality of eddy current separators and adjusts the sorting conditions of the plurality of eddy current separators based on the inspection results; wherein the plurality of eddy current separators each have different pole numbers and magnetic field strengths according to the size of the material to be sorted in the corresponding particle size range.

[0011] The plurality of particle size sections includes a first particle size section of 20 mm to 40 mm, a second particle size section of 10 mm to 20 mm, and a third particle size section of 3 mm to 10 mm, and the eddy current separation unit includes a first eddy current separation section corresponding to the first particle size section, a second eddy current separation section corresponding to the second particle size section, and a third eddy current separation section corresponding to the third particle size section, and the first eddy current separation section includes a first input member connected to an outlet corresponding to the first particle size section of the particle size classification unit to receive the material to be separated in the first particle size section; and a first transfer member disposed below the first input member to transfer the material to be separated supplied from the first input member. A first eddy current generating member disposed at the discharge end of the first conveying member and having a first magnet rotor module in which a plurality of permanent magnets are arranged in alternating polarity, and generating eddy currents on the object to be sorted by the rotation of the first magnet rotor module; a first separation and collection member disposed below the first eddy current generating member and separating and collecting non-ferrous metals ejected by eddy current repulsion and non-conductive materials falling naturally; and a first vision inspection member disposed at the first separation and collection member and photographing the non-ferrous metals and non-conductive materials collected by the first separation and collection member; wherein the second eddy current sorting unit comprises a second input member connected to an outlet corresponding to the second particle size section of the particle size classification unit and receiving the object to be sorted in the second particle size section; A second conveying member disposed below the second input member and conveying the sorting material supplied from the second input member; a second eddy current generating member disposed at the discharge end of the second conveying member and equipped with a second magnet rotor module having a plurality of permanent magnets arranged in alternating polarity, and generating eddy currents in the sorting material by the rotation of the second magnet rotor module; and a second separation and collection member disposed below the second eddy current generating member and separating and collecting non-ferrous metals ejected by eddy current repulsion and non-conductive materials falling naturally.and a second vision inspection member disposed in the second separation and collection member and photographing the non-ferrous metal and the non-conductive whole collected by the second separation and collection member; wherein the third eddy current sorting unit comprises: a third input member connected to an outlet corresponding to the third particle size section of the particle size classification unit to receive the sorted material of the third particle size section; a third transfer member disposed below the third input member and transferring the sorted material supplied from the third input member; and a third eddy current generating member disposed at the discharge end of the third transfer member and equipped with a third magnet rotor module in which a plurality of permanent magnets are arranged in alternating polarity, and generating eddy current in the sorted material by the rotation of the third magnet rotor module. A third separation and collection member disposed below the third eddy current generating member and separating and collecting non-ferrous metals ejected by eddy current repulsion and non-conductive materials falling naturally; and a third vision inspection member disposed on the third separation and collection member and photographing the non-ferrous metals and non-conductive materials collected by the third separation and collection member; wherein the first magnetic rotor module has a first number of poles and forms a first magnetic field strength, the second magnetic rotor module has a second number of poles greater than the first number of poles and forms a second magnetic field strength greater than the first magnetic field strength, and the third magnetic rotor module has a third number of poles greater than the second number of poles and forms a third magnetic field strength greater than the second magnetic field strength, and the control unit comprises an image processing unit that receives and processes images captured from the first vision inspection member, the second vision inspection member, and the third vision inspection member. An AI analysis unit that analyzes data transmitted from the image processing unit using an artificial intelligence algorithm to determine the quality of non-ferrous metal sorting in the first eddy current sorting unit, the second eddy current sorting unit, and the third eddy current sorting unit;An integrated control unit that independently controls the transfer speed of each of the first transfer member, the second transfer member, and the third transfer member, and the rotation speed and rotation direction of each of the first magnetic rotor module, the second magnetic rotor module, and the third magnetic rotor module, based on the analysis results of the AI ​​analysis unit; wherein the image processing unit comprises: a preprocessing unit that removes noise and enhances contrast of images received from the first camera module of the first vision inspection member, the second camera module of the second vision inspection member, and the third camera module of the third vision inspection member, respectively; a contour detection unit that detects the contour of the non-ferrous metal particle from the image processed by the preprocessing unit; and a size measuring unit that measures the size and shape of the non-ferrous metal particle from the contour detected by the contour detection unit. and an incorporation analysis member that tracks the drop position of the non-ferrous metal particles in each of the first separation collection member, the second separation collection member, and the third separation collection member to calculate the incorporation ratio of the non-ferrous metal and the non-conductive material; wherein the AI ​​analysis unit includes a quality classification member that classifies the sorting quality of the non-ferrous metal collected in each of the first non-ferrous metal collection hopper module of the first separation collection member, the second non-ferrous metal collection hopper module of the second separation collection member, and the third non-ferrous metal collection hopper module of the third separation collection member into appropriate, unseparated, and misseparated using a deep learning-based convolutional neural network (CNN); An optimization member that calculates at least one adjustment amount among the rotational speeds of the first magnet rotor module, the second magnet rotor module, and the third magnet rotor module, the transfer speeds of the first transfer member, the second transfer member, and the third transfer member, and the positions of the first splitter module of the first separation and collection member, the second splitter module of the second separation and collection member, and the third splitter module of the third separation and collection member, respectively, using a reinforcement learning algorithm based on the classification result of the quality classification member; a learning member that accumulates training data and continuously trains the convolutional neural network and the reinforcement learning algorithm;and a predictive maintenance member that analyzes the history of rotational speed changes and sorting quality of each of the first magnet rotor module, the second magnet rotor module, and the third magnet rotor module to predict the degree of demagnetization of permanent magnets arranged in the first magnet rotor module, the second magnet rotor module, and the third magnet rotor module, and calculates the maintenance timing;

[0012] The first input member comprises: a first input hopper module formed in a funnel shape that is wide at the top and narrows toward the bottom, connected to an outlet corresponding to the first particle size section of the particle size classification unit, and having a space inside for accommodating the material to be sorted; a first input amount control gate module installed at the lower opening of the first input hopper module to vary the opening area to control the input amount of the material to be sorted; and a first vibrating feeder module disposed below the first input amount control gate module and vibrating by an eccentric weight vibration motor to uniformly disperse the material to be sorted in the width direction of the first conveying member and supply it in a single layer; wherein the first conveying member comprises a first belt module formed of a non-conductive PVC material, having a thickness of 3 mm to 5 mm and a width of 600 mm to 1000 mm; A first tail drum module disposed at the input end of the first belt module, formed of non-magnetic stainless steel, having a diameter of 150 mm to 200 mm, having rubber lagging formed on its outer surface to secure friction with the first belt module, and having both ends rotatably supported by pillow block bearings; a first support roller module comprising a plurality of upper carrier rollers arranged at intervals of 300 mm to 500 mm to support the upper conveying surface of the first belt module, and a plurality of lower return rollers supporting the lower return surface of the first belt module; A first belt drive module comprising a three-phase induction motor, a helical reducer connected to the three-phase induction motor, and a drive pulley coupled to the output shaft of the helical reducer to transmit power to the shaft of the first tail drum module, and driving the first belt module at a feed speed of 1.0 m / s to 1.5 m / s; wherein the first eddy current generating member is cylindrical formed of non-magnetic stainless steel, has a diameter of 300 mm to 400 mm, has a polytetrafluoroethylene (PTFE) lubricating coating formed on its outer surface, is fixedly disposed on a frame without rotating, and supports the first belt module to rotate while wrapping around its outer surface;A first magnet rotor module that is concentrically disposed inside the first head drum module, and has 12 permanent magnets of grade NdFeB N35 to N42 arranged on the outer circumference of a rotor core formed of non-magnetic alloy steel such that the N and S poles alternate, and forms the first magnetic field strength of 3,000 to 5,000 gauss on the surface of the first belt module; and a first rotor drive module comprising a three-phase induction motor connected to the shaft of the first magnet rotor module and an inverter that variably controls the rotational speed of the three-phase induction motor to 1,500 rpm to 2,000 rpm, and which drives the rotational direction of the first magnet rotor module to selectably be the same direction as or opposite to the movement direction of the first belt module; wherein the first separation and collection member comprises: a first splitter module disposed in front of the discharge side of the first head drum module, whose position is adjustable within a horizontal distance of 200 mm to 400 mm from the center of the first head drum module, and whose position is finely adjustable in the horizontal and vertical directions by means of an elongated slot; and a first magnetic material collection hopper module disposed directly below the first head drum module to collect residual magnetic materials. A first non-magnetic material collection hopper module disposed on the side closer to the first head drum module relative to the first splitter module and collecting non-conductive materials naturally falling from the end of the first belt module; and a first non-ferrous metal collection hopper module disposed on the side farther from the first head drum module relative to the first splitter module and collecting non-ferrous metals ejected by eddy current repulsion; wherein the second input member comprises: a second input hopper module formed in a funnel shape that is wide at the top and narrows toward the bottom, and connected to an outlet corresponding to the second particle size section of the particle size classification unit; and a second input amount control gate module installed at the lower opening of the second input hopper module.and a second vibrating feeder module disposed below the second input amount control gate module and driven by an eccentric weight vibrating motor having an amplitude of 1.5 mm to 3.0 mm to disperse and supply the sorted material of the second particle size section in a single layer in the width direction of the second conveying member; wherein the second conveying member comprises: a second belt module formed of a non-conductive polyurethane (PU) material, having a thickness of 2 mm to 3 mm and formed thinner than the first belt module; a second tail drum module disposed at the input end of the second belt module, formed of non-magnetic stainless steel, having a diameter of 120 mm to 160 mm, and having ceramic lagging formed on its outer surface; and a second support roller module supporting the upper conveying surface and the lower return surface of the second belt module. A second belt drive module that drives the conveying speed of the second belt module at 0.5 m / s to 0.8 m / s, but is set slower than the conveying speed of the first belt module by the first belt drive module to increase the residence time of the sorted object in the magnetic field region of the second eddy current generating member; wherein the second eddy current generating member is cylindrical formed of non-magnetic stainless steel, has a diameter of 280 mm to 350 mm, has a slit formed with a predetermined width in the longitudinal direction, has a PTFE lubricating coating formed on the outer surface of the non-slit region, and is fixedly disposed on a frame without rotating; A second magnet rotor module that is eccentrically disposed inside the second head drum module, so that the rotor center is deviated from the center of the second head drum module and is configured to directly contact the inner surface of the second belt module through a slit of the second head drum module, and wherein 22 permanent magnets of grade NdFeB N42 to N48 are arranged such that the N and S poles alternate, and which forms the second magnetic field strength of 5,000 to 8,000 gauss on the surface of the second belt module;and a second rotor drive module connected to the shaft of the second magnet rotor module, variablely controls the rotational speed of the second magnet rotor module to 2,500 rpm to 3,000 rpm, and drives the rotational direction of the second magnet rotor module in a direction opposite to the movement direction of the second belt module to maximize the relative speed between the second belt module and the second magnet rotor module; wherein the slit of the second head drum module improves magnetic field reach efficiency by shortening the distance between the second magnet rotor module and the object to be sorted by the thickness of the second head drum module relative to the first head drum module of the first eddy current sorting unit by causing the second magnet rotor module to directly contact the inner surface of the second belt module, and wherein the second separation collection member is disposed in front of the discharge side of the second head drum module and is horizontally 150 mm to A second splitter module whose position is adjustable within a range of 300 mm; a second magnetic material collection hopper module positioned directly below the second head drum module; a second non-magnetic material collection hopper module positioned on the side closer to the second head drum module relative to the second splitter module; and a second non-ferrous metal collection hopper module positioned on the side farther from the second head drum module relative to the second splitter module; wherein the third input member comprises: a third input hopper module formed in a funnel shape that is wide at the top and narrows toward the bottom, and connected to an outlet corresponding to the third particle size section of the particle size classification unit; and a third input amount control gate module installed at the lower opening of the third input hopper module, wherein the opening amount is precisely limited to prevent excessive input of fine particles of 3 mm to 10 mm. and a third vibration feeder module disposed below the third input amount control gate module and configured as a high-frequency micro-vibration type with an amplitude of 0.5 mm to 1.5 mm to disperse fine particles of the third particle size range into a uniform single layer in the width direction of the third conveying member;The third conveying member comprises: a third belt module formed of a non-conductive polyurethane (PU) material, having a fabric reinforcement layer inserted inside, and formed as an ultra-thin type with a thickness of 1.5 mm to 2.4 mm, thinner than the first belt module and the second belt module; a third tail drum module disposed at the input end of the third belt module, formed of non-magnetic stainless steel, having a diameter of 100 mm to 140 mm, and having ceramic lagging formed on its outer surface; and a third support roller module disposed at intervals of 200 mm to 300 mm to minimize sagging of the third belt module. A third belt drive module that drives the conveying speed of the third belt module at 0.8 m / s to 1.2 m / s, and is set faster than the conveying speed of the second belt module by the second belt drive module, thereby reducing the stacking thickness of the sorted material on the third belt module relative to the same input amount, so that the sorted material is conveyed in a single layer; and the third eddy current generating member is cylindrical formed of non-magnetic stainless steel, has a diameter of 250 mm to 320 mm, has a slit formed with a predetermined width in the longitudinal direction, is configured so that the third magnet rotor module directly contacts the inner surface of the third belt module through the slit, has a PTFE lubricating coating formed on the outer circumference of the non-slit area, and is fixedly disposed on a frame without rotating; A third magnet rotor module eccentrically disposed inside the third head drum module, wherein permanent magnets of grade NdFeB N48 to N52 are arranged in 32 to 38 poles such that the N and S poles alternate, and wherein the third magnetic field strength of 8,000 to 12,000 gauss is formed on the surface of the third belt module, and the pole spacing is formed to be 13 mm to 22 mm, corresponding to the size of the material to be sorted in the third particle size section;and a third rotor drive module connected to the shaft of the third magnet rotor module, variablely controlling the rotational speed of the third magnet rotor module to 3,500 rpm to 4,500 rpm, and driving the rotational direction of the third magnet rotor module in a direction opposite to the movement direction of the third belt module; wherein the third separation and collection member comprises: a third splitter module disposed in front of the discharge side of the third head drum module and whose position is adjustable within a horizontal distance of 100 mm to 250 mm from the center of the third head drum module; a third magnetic material collection hopper module disposed directly below the third head drum module; and a third non-magnetic material collection hopper module disposed on the side closer to the third head drum module relative to the third splitter module. and a third non-ferrous metal collection hopper module positioned on the side farther from the third head drum module relative to the third splitter module;The first vision inspection member comprises a first camera module positioned above the first non-ferrous metal collection hopper module to photograph the trajectory and distribution of non-ferrous metal falling into the first non-ferrous metal collection hopper module, and a first lighting module positioned corresponding to the first camera module to illuminate a shooting area; the second vision inspection member comprises a second camera module positioned above the second non-ferrous metal collection hopper module to photograph the trajectory and distribution of non-ferrous metal falling into the second non-ferrous metal collection hopper module, and a second lighting module positioned corresponding to the second camera module to illuminate a shooting area; and the third vision inspection member comprises a third camera module positioned above the third non-ferrous metal collection hopper module to photograph the trajectory and distribution of non-ferrous metal falling into the third non-ferrous metal collection hopper module, and the third camera module It includes a third lighting module positioned in correspondence to illuminate a shooting area, wherein the third belt module is formed thinner than the first belt module and the second belt module so as to minimize the distance between the third magnetic rotor module and the object to be sorted, and the number of poles of the third magnetic rotor module is configured to be greater than the number of poles of the first magnetic rotor module and the second magnetic rotor module so as to narrow the pole spacing in correspondence with the size of the object to be sorted in the third particle size section, and accordingly, an eddy current effective even for fine objects to be sorted in the third particle size section is induced, and the integrated control unit comprises a first belt inverter member, a second belt inverter member, and a third belt inverter member positioned in correspondence with the first conveying member, the second conveying member, and the third conveying member, respectively, to individually control the conveying speed of each of the first conveying member, the second conveying member, and the third conveying member;A first rotor inverter member, a second rotor inverter member, and a third rotor inverter member respectively disposed corresponding to the first eddy current generating member, the second eddy current generating member, and the third eddy current generating member to individually control the rotational speed and rotational direction of each of the first magnet rotor module of the first eddy current generating member, the second magnet rotor module of the second eddy current generating member, and the third magnet rotor module of the third eddy current generating member; a controller member that generates and transmits control signals to the first belt inverter member to the third belt inverter member and the first rotor inverter member to the third rotor inverter member respectively, based on a control amount received from the optimization member of the AI ​​analysis unit; A sensor input member receiving measurement values ​​from a plurality of speed sensors that detect the transfer speed of each of the first transfer member, the second transfer member, and the third transfer member, and the rotation speed of each of the first magnet rotor module, the second magnet rotor module, and the third magnet rotor module; and an interface member that displays the transfer speed, rotor rotation speed, rotation direction, and sorting quality status of each of the first eddy current sorting unit, the second eddy current sorting unit, and the third eddy current sorting unit, and receives input of a set value from an operator; wherein the controller member compares and calculates the measurement value received from the sensor input member and the adjustment amount received from the AI ​​analysis unit, and performs real-time feedback control of the first belt inverter member to the third belt inverter member and the first rotor inverter member to the third rotor inverter member; and the integrated control unit repeatedly performs image reception from the first vision inspection member, the second vision inspection member, and the third vision inspection member, processing by the image processing unit, analysis by the AI ​​analysis unit, and control by the controller member at a period of 1 to 10 seconds.

[0013] The particle size classification unit comprises: a trommel input section connected to the discharge port of the magnetic separation unit and receiving the sorted material from which the magnetic material has been separated; a trommel main body section connected to the discharge side of the trommel input section, positioned at an angle such that the input side is higher and the discharge side is lower, and classifying the sorted material into a plurality of particle size sections according to particle size by rotation; and a particle size discharge section positioned below the trommel main body section and guiding the sorted material classified by the plurality of particle size sections to the corresponding eddy current separation section of the eddy current separation unit, respectively; wherein the trommel input section comprises an input chute member positioned between the discharge port of the magnetic separation unit and the input side opening of the trommel main body section to store the sorted material and guide the stored sorted material into the interior of the trommel main body section. and an input guide member installed in the input chute member to guide the inflow direction of the sorting material flowing into the trommel main body; wherein the trommel main body comprises: a rotary drum member formed in a cylindrical shape and having a plurality of mesh sections arranged sequentially from the input side to the discharge side along the axial direction and having different mesh openings; and a drum rotation drive member comprising a drive motor that provides rotational force to the rotary drum member, a chain sprocket that transmits the rotational force of the drive motor to the outer surface of the rotary drum member, and a plurality of rotation support rollers disposed at the lower ends of the rotary drum member to rotatably support the rotary drum member. and a drum inclination support member comprising an inclined frame adjustable to an inclination angle within a range of 3 to 7 degrees, which supports the rotary drum member so that the input side is higher and the discharge side is lower, and an inclined adjuster for finely adjusting the inclination angle of the inclined frame; wherein the plurality of mesh sections of the rotary drum member comprises: a dust removal mesh section module disposed at the front end of the input side and having a mesh opening formed of 3 mm to allow dust of 3 mm or less to pass through; and a third mesh section module disposed adjacent to the discharge side of the dust removal mesh section module and having a mesh opening formed of 10 mm to allow particles of more than 3 mm and less than or equal to 10 mm to pass through.A second mesh section module disposed adjacent to the discharge side of the third mesh section module and having a mesh opening formed of 20 mm to allow particles exceeding 10 mm and not exceeding 20 mm to pass through; and a first mesh section module disposed adjacent to the discharge side of the second mesh section module and having a mesh opening formed of 40 mm to allow particles exceeding 20 mm and not exceeding 40 mm to pass through; wherein the particle size discharge unit comprises: a dust discharge member disposed below the dust removal mesh section module and collecting dust of 3 mm or less and discharging it to a dust treatment path; and a third particle size discharge member disposed below the third mesh section module and collecting particles exceeding 3 mm and not exceeding 10 mm and transferring them to the third eddy current separation unit. It includes: a second particle size discharge member disposed below the second mesh section module and collecting particles exceeding 10mm and less than or equal to 20mm and transferring them to the second eddy current separation unit; a first particle size discharge member disposed below the first mesh section module and collecting particles exceeding 20mm and less than or equal to 40mm and transferring them to the first eddy current separation unit; and an oversized particle conveying member that collects particles exceeding 40mm that did not pass through the first mesh section module and transfers them to a crusher.

[0014] The magnetic separation unit comprises: an input section for receiving the mixed waste; a magnetic conveying section disposed below the input section for conveying the mixed waste supplied from the input section; a magnetic drum section disposed at the discharge end of the magnetic conveying section for magnetically attaching the magnetic material among the mixed waste by means of an embedded permanent magnet and then separating and dropping the magnetic material outside the magnetic range; a magnetic material discharge section disposed below the magnetic drum section for collecting the separated magnetic material; and a magnetic separation frame section supporting the input section, the magnetic conveying section, the magnetic drum section, and the magnetic material discharge section; wherein the input section comprises: an input hopper member formed in a funnel shape that is wide at the top and narrows toward the bottom, having a space inside for accommodating the mixed waste; and an input amount control gate member installed at the lower opening of the input hopper member for controlling the input amount of the mixed waste. and a vibrating feeder member disposed below the input amount control gate member and vibrating by an eccentric weight vibration motor to uniformly disperse the mixed waste in the belt width direction of the magnetic conveying unit; wherein the magnetic conveying unit comprises: a belt member formed of a non-magnetic rubber belt material, having a thickness of 3 mm to 5 mm and a width of 600 mm to 1000 mm; a tail drum member disposed at the input end of the belt member, formed of non-magnetic stainless steel, having a diameter of 150 mm to 200 mm, and having rubber lagging formed on its outer surface to secure frictional force with the belt member; and a support roller member comprising a plurality of upper carrier rollers supporting the upper conveying surface of the belt member and a plurality of lower return rollers supporting the lower return surface of the belt member. and a belt drive member comprising a three-phase induction motor and a reduction gear, and transmitting power to the shaft of the tail drum member to drive the belt member; wherein the magnetic drum member comprises a cylindrical drum outer casing member formed of non-magnetic stainless steel;and a permanent magnet member fixed in a non-rotating state inside the drum outer casing member, wherein ferrite or NdFeB permanent magnets are arranged such that their N and S poles alternate to form a magnetic field on the outer surface of the drum outer casing member; wherein the drum outer casing member is rotated by the movement of the belt member and the permanent magnet member is fixed, so that the magnetic material among the mixed waste is transported while attached to the surface of the belt member by the magnetic force of the permanent magnet member and falls downward at a point where it goes out of the magnetic force range, and the magnetic material discharge part includes a magnetic material chute member positioned at an angle below the magnetic drum part to guide the falling magnetic material; and a magnetic material collection container member positioned at the bottom of the magnetic material chute member to collect the magnetic material. Effects of the invention

[0015] According to the present invention, by classifying the material to be sorted into a plurality of particle size sections according to particle size, and then sorting by arranging a plurality of eddy current sorting units having different pole numbers and magnetic field strengths in parallel corresponding to each particle size section, the sorting efficiency and recovery rate of non-ferrous metals can be significantly improved across the entire particle size range from large particles (20 mm to 40 mm) to fine metals (3 mm to 10 mm).

[0016] In addition, according to the present invention, in an eddy current separation unit corresponding to a fine particle size range, the belt thickness is reduced by applying an ultra-thin belt, an eccentric arrangement is adopted in which a magnet rotor directly contacts the inner surface of the belt through a slit formed in the head drum, high-grade permanent magnets are arranged in a multi-pole manner, and the relative speed is maximized by high-speed rotation and opposite rotation, thereby making it possible to effectively separate fine non-ferrous metals in the range of 3 mm to 10 mm, which were difficult to separate with conventional technology.

[0017] In addition, according to the present invention, a vision inspection member is provided in each eddy current sorting unit, and sorting quality is automatically classified into appropriate, unseparated, and misseparated by a deep learning-based convolutional neural network (CNN), and the conveying speed, rotor rotation speed, and splitter position are automatically optimized by a reinforcement learning algorithm, and real-time feedback control is implemented by repeating this process at a cycle of 1 to 10 seconds, thereby actively responding to changes in the composition of the sorted material to maintain consistent high-quality sorting results. Brief explanation of the drawing

[0018] FIG. 1 is a diagram illustrating the structure of a non-ferrous metal eddy current separator capable of classifying fine metals according to one embodiment of the present invention. FIG. 2 is a diagram illustrating the structure of a first eddy current sorting unit according to an embodiment of the present invention. FIG. 3 is a diagram illustrating the structure of a second eddy current sorting unit according to an embodiment of the present invention. FIG. 4 is a diagram illustrating the structure of a third eddy current sorting unit according to an embodiment of the present invention. FIG. 5 is a drawing illustrating the structure of a first eddy current generating member to a third eddy current generating member according to an embodiment of the present invention. FIG. 6 is a drawing illustrating the structure of the first to third magnet rotor modules according to one embodiment of the present invention. FIG. 7 is a diagram illustrating the structure of a control unit according to one embodiment of the present invention. Specific details for implementing the invention

[0019] Hereinafter, embodiments are described in detail with reference to the attached drawings. However, various modifications may be made to the embodiments, and thus the scope of the patent application is not limited or restricted by these embodiments. It should be understood that all modifications, equivalents, and substitutions to the embodiments are included within the scope of the rights.

[0020] Specific structural or functional descriptions of the embodiments are disclosed for illustrative purposes only and may be modified and implemented in various forms. Accordingly, the embodiments are not limited to the specific disclosed forms, and the scope of this specification includes modifications, equivalents, or substitutions that fall within the technical concept.

[0021] Terms such as "first" or "second" may be used to describe various components, but these terms should be interpreted solely for the purpose of distinguishing one component from another. For example, the first component may be named the second component, and similarly, the second component may be named the first component.

[0022] When it is stated that a component is "connected" to another component, it should be understood that it may be directly connected to or joined to that other component, or that there may be other components in between.

[0023] The terms used in the embodiments are for illustrative purposes only and should not be interpreted as intended to be limiting. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as "comprising" or "having" are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0024] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the embodiments pertain. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0025] In addition, when describing with reference to the attached drawings, identical components are assigned the same reference numeral regardless of drawing symbols, and redundant descriptions thereof are omitted. When describing embodiments, if it is determined that a detailed description of related prior art could unnecessarily obscure the essence of the embodiment, such detailed description is omitted.

[0026] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims.

[0027] In the embodiments of the present invention, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in the embodiments of the present invention.

[0028] The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining embodiments of the present invention are exemplary, and therefore the present invention is not limited to the depicted details. Furthermore, in describing the present invention, if it is determined that a detailed description of related known technology may unnecessarily obscure the essence of the present invention, such detailed description is omitted. Where terms such as "includes," "has," or "is made up" are used in this specification, other parts may be added unless "only" is used. Where a component is expressed in the singular, it includes cases where it includes the plural unless specifically stated otherwise.

[0029] In interpreting the components, they are interpreted to include a margin of error even in the absence of a separate explicit statement.

[0030] In the case of describing a positional relationship, for example, when the positional relationship between two parts is described using expressions such as 'on,' 'upper,' 'lower,' or 'next to,' one or more other parts may be located between the two parts unless 'immediately' or 'directly' is used.

[0031] When elements or layers are referred to as "on" another element or layer, this includes cases where another layer or element is placed directly on top of or in between. Throughout the specification, the same reference numerals refer to the same components.

[0032] The size and thickness of each component shown in the drawings are illustrated for convenience of explanation, and the present invention is not necessarily limited to the size and thickness of the illustrated components.

[0033] The features of each of the various embodiments of the present invention may be combined or combined with one another, either partially or wholly, and as will be fully understood by those skilled in the art, various technical interlocking and operation are possible, and each embodiment may be implemented independently of one another or together in an interlocking relationship.

[0035] FIG. 1 is a diagram illustrating the structure of a non-ferrous metal eddy current separator capable of classifying fine metals according to an embodiment of the present invention. FIG. 2 is a diagram illustrating the structure of a first eddy current separator according to an embodiment of the present invention. FIG. 3 is a diagram illustrating the structure of a second eddy current separator according to an embodiment of the present invention. FIG. 4 is a diagram illustrating the structure of a third eddy current separator according to an embodiment of the present invention. FIG. 5 is a diagram illustrating the structure of a first to third eddy current generating member according to an embodiment of the present invention. FIG. 6 is a diagram illustrating the structure of a first to third magnet rotor module according to an embodiment of the present invention. FIG. 7 is a diagram illustrating the structure of a control unit according to an embodiment of the present invention.

[0036] Hereinafter, with reference to FIGS. 1 to 7, a non-ferrous metal eddy current separator (1000) capable of classifying fine metals according to one embodiment of the present invention will be described.

[0037] A non-ferrous metal eddy current separator (1000) capable of classifying fine metals according to one embodiment of the present invention includes a frame unit (1100), a magnetic separation unit (1200), a particle size classification unit (1300), an eddy current separation unit (1400), and a control unit (1500).

[0038] The frame unit (1100) forms the entire framework of a non-ferrous metal eddy current separator (1000) capable of classifying fine metals, and stably supports a magnetic separation unit (1200), a particle size classification unit (1300), an eddy current separation unit (1400), and a control unit (1500).

[0039] The frame unit (1100) has a predetermined height in the vertical direction (see FIG. 1), extends along one direction (see FIG. 1), and has a predetermined width along the cross direction (see FIG. 1). The frame unit (1100) is formed of a rigid metal structural material and has a plurality of installation surfaces and fastening parts where each unit is installed. The frame unit (1100) is fixed to the ground or the installation floor surface with anchor bolts and may be provided with a height adjustment means to enable leveling adjustment. The frame unit (1100) includes a magnetic separation installation area where a magnetic separation unit (1200) is installed, a particle size classification installation area where a particle size classification unit (1300) is installed, an eddy current separation installation area where the first eddy current separation section (1410), the second eddy current separation section (1420), and the third eddy current separation section (1430) of the eddy current separation unit (1400) are each installed in parallel, and a control panel installation area where a control panel of the control unit (1500) is installed. The magnetic separation installation area is located at the upper upstream side of the frame unit (1100), the particle size classification installation area is located adjacent to the downstream side of the magnetic separation installation area, and the eddy current separation installation area is located below and downstream of the particle size classification installation area. The control panel installation area is positioned on one side of the eddy current screening installation area to facilitate easy access for workers. Each installation area of ​​the frame unit (1100) is equipped with a unit-specific fastening bracket, so that each unit is firmly connected to the frame unit (1100) by a bolt fastening method. The frame unit (1100) absorbs vibrations and loads generated during operation to ensure the structural stability of the entire device, and if necessary, a vibration isolation pad is interposed between the frame unit (1100) and the ground to reduce the external transmission of vibrations.

[0040] The magnetic separation unit (1200) is installed in the magnetic separation installation area of ​​the frame unit (1100) and preferentially separates magnetic materials contained in mixed waste fed from the outside by magnetic force. By removing magnetic materials from the mixed waste in advance by the magnetic separation unit (1200), adsorption and adhesion to the surface of the magnetic rotor module by magnetic materials, belt damage, and reduction of separation accuracy are prevented during the subsequent eddy current separation process.

[0041] The particle size classification unit (1300) is connected to the magnetic separation unit (1200) and classifies the material to be separated from the magnetic separation unit (1200) into multiple particle size sections according to particle size. The non-magnetic material to be separated from which the magnetic material has been removed at the discharge side of the magnetic separation unit (1200) is projected and discharged toward the front of the magnetic drum section (1230), and the discharged material to be separated is guided by gravity to the trommel input section (1340) of the particle size classification unit (1300) through a connecting chute positioned at an angle between the magnetic separation unit (1200) and the particle size classification unit (1300). The connecting chute is formed of an inclined plate with a wear-resistant lining attached, so that the material to be separated slides smoothly without stagnation on the inner surface of the chute. The particle size classification unit (1300) classifies the material to be sorted into a first particle size section (1310), a second particle size section (1320), and a third particle size section (1330), thereby providing a basis for applying eddy current sorting conditions optimized for each particle size section.

[0042] The eddy current separation unit (1400) is connected to the particle size classification unit (1300) and includes a plurality of eddy current separation sections arranged in parallel, corresponding to each of the plurality of particle size sections. The eddy current separation unit (1400) receives the material to be separated for each particle size section and separates non-ferrous metals by eddy currents. The plurality of eddy current separation sections each have different pole numbers and magnetic field strengths depending on the size of the material to be separated for the corresponding particle size section, thereby effectively separating not only large non-ferrous metals but also fine non-ferrous metals.

[0043] The control unit (1500) inspects the condition of non-ferrous metals selected from a plurality of eddy current sorting units and adjusts the sorting conditions of the plurality of eddy current sorting units based on the inspection results. The control unit (1500) maintains the sorting quality continuously in an optimal state by integrally performing vision inspection, artificial intelligence analysis, and real-time feedback control. The hardware of the image processing unit (1510), AI analysis unit (1520), and integrated control unit (1530) of the control unit (1500) is housed within a control panel installed in the control panel installation area of ​​the frame unit (1100), and shielded cables are wired along a cable tray from the control panel to the belt drive module and rotor drive module of each eddy current sorting unit to be electrically connected. Signal transmission between the control panel and each drive device is performed using an industrial fieldbus protocol or an analog current signal (4-20mA), and signal distortion caused by electromagnetic interference (EMI) is prevented by the shielded cables.

[0044] The overall processing flow of the non-ferrous metal eddy current separator (1000) capable of classifying fine metals according to the present invention is as follows.

[0045] First, mixed waste collected from the outside is fed through the input section (1210) of the magnetic separation unit (1200). The fed mixed waste is transported by the magnetic transport section (1220) and passes through the magnetic drum section (1230). Magnetic materials containing iron, nickel, and cobalt are separated while attached to the surface of the belt member (1221) by the magnetic force of the permanent magnet member (1232) of the magnetic drum section (1230) and collected in the magnetic material discharge section (1240). The non-magnetic material to be separated from which the magnetic materials have been removed is projected forward from the magnetic drum section (1230) and discharged, and is guided to the trommel input section (1340) of the particle size classification unit (1300) through a connecting chute.

[0046] Next, the rotating drum member (1351) of the trommel body part (1350) of the particle size classification unit (1300) rotates and classifies the materials to be sorted according to particle size. Dust of 3mm or less passes through the dust removal mesh section module (1351a) and is discharged to the dust discharge member (1361); fine particles greater than 3mm and less than or equal to 10mm pass through the third mesh section module (1351b) and are transferred to the third eddy current separation unit (1430) through the third particle size discharge member (1362); medium particles greater than 10mm and less than or equal to 20mm pass through the second mesh section module (1351c) and are transferred to the second eddy current separation unit (1420) through the second particle size discharge member (1363); and large particles greater than 20mm and less than or equal to 40mm pass through the first mesh section module (1351d) and are transferred to the first eddy current separation unit (1410) through the first particle size discharge member (1364). Excessive particles exceeding 40 mm are conveyed to a crusher through an excessive particle conveying member (1365), crushed, and then reintroduced into a particle size classification unit (1300).

[0047] Next, the first eddy current sorting unit (1410), the second eddy current sorting unit (1420), and the third eddy current sorting unit (1430) each receive materials to be sorted in corresponding particle size ranges and perform sorting by eddy current in parallel. In each eddy current sorting unit, non-ferrous metals are ejected forward by the eddy current repulsion force and collected in the non-ferrous metal collection hopper module, non-conductive materials fall naturally and are collected in the non-magnetic material collection hopper module, and residual magnetic materials are collected in the magnetic material collection hopper module located directly below the head drum module.

[0048] At the same time, the control unit (1500) processes images captured by the vision inspection member of each eddy current sorting unit in the image processing unit (1510), determines sorting quality in the AI ​​analysis unit (1520), and maintains the sorting quality in an optimal state by providing real-time feedback control of the conveying speed, rotor rotation speed, and splitter position of each eddy current sorting unit through the integrated control unit (1530). As this entire process is performed continuously, even fine non-ferrous metals contained in mixed waste are sorted and recovered with a high recovery rate and high purity.

[0049] The magnetic separation unit (1200) is a pretreatment device that separates and removes magnetic materials containing iron, nickel, and cobalt from mixed waste by magnetic force, and is installed in the magnetic separation installation area of ​​the frame unit (1100). The magnetic separation unit (1200) includes an input section (1210), a magnetic transfer section (1220), a magnetic drum section (1230), a magnetic material discharge section (1240), and a magnetic separation frame section (1250).

[0050] The input section (1210) receives mixed waste supplied from the outside and performs the function of supplying the received mixed waste quantitatively and uniformly onto the belt of the magnetic conveying section (1220). The input section (1210) is positioned above the input side of the magnetic conveying section (1220).

[0051] The input section (1210) includes an input hopper member (1211), an input amount control gate member (1212), and a vibrating feeder member (1213).

[0052] The input hopper member (1211) is formed in a funnel shape that is wide at the top and narrows toward the bottom, and has a space for accommodating mixed waste inside. The upper opening of the input hopper member (1211) is connected to an external waste supply device or conveyor to accommodate mixed waste. The funnel shape of the input hopper member (1211) induces the mixed waste to naturally move downward by its own weight, and the angle of inclination of the inner wall surface is set so that the waste descends smoothly without bridging. A wear-resistant lining is attached to the inner wall surface of the input hopper member (1211) to reduce wear caused by friction with the mixed waste.

[0053] The input amount control gate member (1212) is installed at the lower opening of the input hopper member (1211) to control the input amount of mixed waste. The input amount control gate member (1212) controls the amount of mixed waste supplied to the magnetic transfer unit (1220) per unit time by varying the opening area in a sliding or rotating manner. The input amount control gate member (1212) can be operated manually or automatically by an electric actuator, thereby precisely controlling the input amount to match the processing capacity of the subsequent process.

[0054] The vibrating feeder member (1213) is positioned below the input amount control gate member (1212) and vibrates by an eccentric weight vibrating motor. The vibrating feeder member (1213) uniformly disperses the mixed waste that has passed through the input amount control gate member (1212) in the width direction of the belt member (1221) of the magnetic transport unit (1220). By the vibration of the vibrating feeder member (1213), the mixed waste is evenly distributed on the belt member (1221) without being concentrated, thereby improving the efficiency of magnetic separation. The vibration frequency and amplitude of the vibrating feeder member (1213) can be adjusted according to the characteristics of the mixed waste.

[0055] The magnetic conveying unit (1220) is positioned below the input unit (1210) and conveys the mixed waste supplied from the input unit (1210) toward the magnetic drum unit (1230). The magnetic conveying unit (1220) is configured as a belt conveyor and stably conveys the mixed waste at a constant speed so that the separation of magnetic materials by the magnetic drum unit (1230) is performed uniformly.

[0056] The magnetic transfer unit (1220) includes a belt member (1221), a tail drum member (1222), a support roller member (1223), and a belt drive member (1224).

[0057] The belt member (1221) is formed of a non-magnetic rubber belt material, has a thickness of 3 mm to 5 mm, and a width of 600 mm to 1000 mm. Since the belt member (1221) is formed of a non-magnetic material, the belt member (1221) itself is not affected by the magnetic field of the magnetic drum part (1230), and thus the adsorption and separation of magnetic materials by magnetic force are not hindered by the material of the belt member (1221). The thickness of the belt member (1221) is set to ensure both durability and flexibility, and the width of the belt member (1221) is set to correspond to the processing capacity.

[0058] The tail drum member (1222) is positioned at the input end of the belt member (1221), is formed of non-magnetic stainless steel, and has a diameter of 150 mm to 200 mm. A rubber lagging is formed on the outer surface of the tail drum member (1222) to secure frictional force with the belt member (1221). Due to the rubber lagging, the belt member (1221) rotates stably without slipping on the outer surface of the tail drum member (1222), thereby maintaining a uniform conveying speed of the mixed waste.

[0059] The support roller member (1223) includes a plurality of upper carrier rollers that support the upper conveying surface of the belt member (1221) and a plurality of lower return rollers that support the lower return surface of the belt member (1221). The plurality of upper carrier rollers are arranged at predetermined intervals so that the upper conveying surface of the belt member (1221) does not sag, thereby supporting the belt member (1221) horizontally and distributing the load of mixed waste to prevent deformation of the belt member (1221). The plurality of lower return rollers support the lower return surface of the belt member (1221) so that it does not come into contact with the ground or a frame.

[0060] The belt drive member (1224) includes a three-phase induction motor and a reduction gear, and drives the belt member (1221) by transmitting power to the shaft of the tail drum member (1222). The three-phase induction motor of the belt drive member (1224) generates stable rotational force, and the reduction gear reduces the rotational speed of the three-phase induction motor to an appropriate range and transmits it to the tail drum member (1222). The conveying speed of the belt member (1221) is set by the belt drive member (1224), and the conveying speed is adjusted according to the amount of mixed waste input and the magnetic separation efficiency in the magnetic drum section (1230).

[0061] The magnetic drum section (1230) is positioned at the discharge end of the magnetic conveying section (1220), and magnetically attaches the magnetic material among the mixed waste by means of a built-in permanent magnet, and then separates and drops the magnetic material outside the magnetic range. The magnetic drum section (1230) functions as a head drum at the discharge end of the belt member (1221), and the belt member (1221) rotates while wrapping around the outer surface of the magnetic drum section (1230).

[0062] The magnetic drum section (1230) includes a drum outer casing member (1231) and a permanent magnet member (1232).

[0063] The drum outer casing member (1231) is formed as a cylindrical shape made of non-magnetic stainless steel. The drum outer casing member (1231) rotates together with the movement of the belt member (1221), and the outer surface of the drum outer casing member (1231) contacts the inner surface of the belt member (1221) to guide the movement of the belt member (1221). Since the drum outer casing member (1231) is formed of non-magnetic stainless steel, the magnetic field formed by the permanent magnet member (1232) is not shielded by the drum outer casing member (1231) and effectively reaches the outer surface of the drum outer casing member (1231). Since the drum outer casing member (1231) is formed of non-magnetic stainless steel, corrosion of the drum outer casing member (1231) is suppressed even when the mixed waste contains moisture, allowing for stable use over a long period.

[0064] The permanent magnet member (1232) is fixed in a non-rotating state inside the drum outer casing member (1231), and ferrite or NdFeB permanent magnets are arranged so that the N pole and S pole alternate to form a magnetic field on the outer surface of the drum outer casing member (1231). The permanent magnet member (1232) remains fixed without rotating even when the drum outer casing member (1231) rotates, and thereby a magnetic field presence section is formed in the area where the permanent magnet member (1232) is located on the outer surface of the drum outer casing member (1231), and a magnetic field presence section is formed in the area where the permanent magnet member (1232) is not located.

[0065] Among the mixed waste, the magnetic material moves to the upper part of the magnetic drum section (1230) by the transport of the belt member (1221), and then is transported along the rotational direction of the drum outer casing member (1231) while attached to the surface of the belt member (1221) by the magnetic force of the permanent magnet member (1232). When the magnetic material reaches a point outside the magnetic force range of the permanent magnet member (1232), the magnetic force is extinguished, and the magnetic material falls freely downward from the surface of the belt member (1221). Since the non-magnetic material does not attach due to magnetic force, it is projected forward in a parabolic trajectory from the end of the belt member (1221) and is separated from the magnetic material.

[0066] The magnetic discharge unit (1240) is positioned below the magnetic drum unit (1230) to collect separated magnetic materials. The magnetic discharge unit (1240) includes a magnetic chute member (1241) and a magnetic collection container member (1242).

[0067] The magnetic body chute member (1241) is positioned at an angle below the magnetic drum part (1230) to guide falling magnetic bodies. The magnetic body chute member (1241) guides the magnetic bodies downward along the inclined surface and prevents the scattering of magnetic bodies. The inner surface of the magnetic body chute member (1241) is treated with a wear-resistant coating to ensure durability against repeated collisions and friction with magnetic bodies.

[0068] The magnetic material collection container member (1242) is positioned at the bottom of the magnetic material chute member (1241) to collect magnetic materials guided through the magnetic material chute member (1241). The magnetic material collection container member (1242) is configured to be detachable so that it can be taken out to the outside when the amount of collected magnetic materials reaches a predetermined amount.

[0069] The magnetic separation frame section (1250) supports the input section (1210), the magnetic transfer section (1220), the magnetic drum section (1230), and the magnetic discharge section (1240). The magnetic separation frame section (1250) is fixedly installed in the magnetic separation installation area of ​​the frame unit (1100) by a bolt fastening method and maintains the relative arrangement relationship of the input section (1210), the magnetic transfer section (1220), the magnetic drum section (1230), and the magnetic discharge section (1240). The magnetic separation frame section (1250) supports vibrations and loads generated during the operation of the magnetic separation unit (1200) and has a robust structure to prevent the position of each component from changing.

[0070] The particle size classification unit (1300) is connected to the magnetic separation unit (1200) and classifies the material to be separated from the magnetic separation unit (1200) into multiple particle size sections according to particle size. The particle size classification unit (1300) is configured in a trommel (rotating cylindrical screen) manner and classifies the material to be separated into a first particle size section (1310), a second particle size section (1320), and a third particle size section (1330). The first particle size section (1310) corresponds to a particle size range of 20 mm to 40 mm, the second particle size section (1320) corresponds to a particle size range of 10 mm to 20 mm, and the third particle size section (1330) corresponds to a particle size range of 3 mm to 10 mm. As the material to be sorted is sorted by particle size by the particle size classification unit (1300), the sorting conditions optimized for each particle size range can be applied in the subsequent process, the eddy current sorting unit (1400).

[0071] The particle size classification unit (1300) includes a trommel input section (1340), a trommel main body section (1350), and a particle size discharge section (1360).

[0072] The trommel input section (1340) is connected to the outlet of the magnetic separation unit (1200) to receive the material to be separated from the magnetic material, and guides the received material to be separated into the interior of the trommel main body (1350). The trommel input section (1340) is positioned adjacent to the input side opening of the trommel main body (1350).

[0073] The trommel input section (1340) includes an input chute member (1341) and an input guide member (1342).

[0074] The input chute member (1341) is positioned between the discharge port of the magnetic separation unit (1200) and the input side opening of the trommel main body (1350) to store the material to be separated and guide the stored material to be separated into the interior of the trommel main body (1350). The input chute member (1341) is provided with an inclined surface to guide the material to be separated to naturally flow into the interior of the trommel main body (1350) by its own weight. The input chute member (1341) temporarily buffers fluctuations in the flow rate of the material to be separated discharged from the magnetic separation unit (1200), thereby preventing an excessive amount of material to be separated from rapidly flowing into the trommel main body (1350).

[0075] The input guide member (1342) is installed in the input chute member (1341) and guides the direction of inflow of the material to be sorted into the trommel main body (1350). By the input guide member (1342), the material to be sorted is directed toward the inner wall surface of the rotating drum member (1351) of the trommel main body (1350) in an appropriate direction, thereby ensuring that the material to be sorted is evenly dispersed within the rotating drum member (1351).

[0076] The trommel main body (1350) is connected to the discharge side of the trommel input section (1340) and is positioned at an angle such that the input side is higher and the discharge side is lower, and classifies the material to be sorted into multiple particle size sections according to particle size by rotation. Due to the angled arrangement, the material to be sorted moves naturally from the input side to the discharge side, and is classified by particle size through the mesh opening.

[0077] The trommel main body (1350) includes a rotating drum member (1351), a drum rotation driving member (1352), and a drum inclination support member (1353).

[0078] The rotating drum member (1351) is formed in a cylindrical shape and is provided with a plurality of mesh sections having different mesh openings arranged sequentially from the input side to the discharge side along the axial direction. The rotating drum member (1351) rotates around a central axis, and as the material to be sorted inside is agitated by the rotation, it is classified by particle size through the mesh openings. A lifter may be installed on the inner wall surface of the rotating drum member (1351), and as the material to be sorted is lifted upward by the lifter during rotation and then falls, the frequency of contact with the mesh openings increases, thereby improving the sorting efficiency.

[0079] A plurality of mesh sections of the rotating drum member (1351) include a dust removal mesh section module (1351a), a third mesh section module (1351b), a second mesh section module (1351c), and a first mesh section module (1351d).

[0080] The dust removal mesh section module (1351a) is positioned at the front of the input side and has a mesh opening of 3 mm to allow dust of 3 mm or less to pass through. The dust removal mesh section module (1351a) removes fine dust in advance to prevent clogging of subsequent mesh sections and excludes ultrafine particles that are not subject to eddy current separation from the separation process.

[0081] The third mesh section module (1351b) is positioned adjacent to the discharge side of the dust removal mesh section module (1351a), and the mesh opening is formed to be 10 mm, allowing particles of 3 mm or more and 10 mm or less to pass through. The particles that pass through the third mesh section module (1351b) correspond to the third particle size section (1330) and are materials to be sorted, including fine non-ferrous metals.

[0082] The second mesh section module (1351c) is positioned adjacent to the discharge side of the third mesh section module (1351b), and the mesh opening is formed to be 20 mm, allowing particles of 10 mm or more and 20 mm or less to pass through. Particles that pass through the second mesh section module (1351c) correspond to the second particle size section (1320).

[0083] The first mesh section module (1351d) is positioned adjacent to the discharge side of the second mesh section module (1351c), and the mesh opening is formed to be 40mm, allowing particles exceeding 20mm and less than or equal to 40mm to pass through. Particles that pass through the first mesh section module (1351d) correspond to the first particle size section (1310). Excessive particles exceeding 40mm that do not pass through the first mesh section module (1351d) are discharged through the discharge side opening of the rotating drum member (1351).

[0084] Multiple mesh sections are arranged such that the mesh openings gradually increase from the input side to the output side, thereby classifying fine particles first and large particles sequentially thereafter. This arrangement prevents clogging of the fine mesh by large particles and improves the classification accuracy of each particle size range.

[0085] The drum rotation drive member (1352) provides rotational force to the rotating drum member (1351). The drum rotation drive member (1352) includes a drive motor (1352a), a chain sprocket (1352b), and a plurality of rotation support rollers (1352c).

[0086] The drive motor (1352a) generates rotational force on the rotating drum member (1351) and drives the rotational speed of the rotating drum member (1351) so as to be adjustable according to the processing capacity and the characteristics of the material to be selected.

[0087] The chain sprocket (1352b) transmits the rotational force of the drive motor (1352a) to the outer surface of the rotating drum member (1351). The chain sprocket (1352b) consists of a drive sprocket coupled to the output shaft of the drive motor (1352a), a driven sprocket coupled to the outer surface of the rotating drum member (1351), and a chain connecting the drive sprocket and the driven sprocket. Through the chain sprocket (1352b) method, power transmission between the drive motor (1352a) and the rotating drum member (1351) is stably achieved, and an accurate rotational speed is maintained without slip.

[0088] A plurality of rotational support rollers (1352c) are positioned at the lower ends of both ends of the rotational drum member (1351) to rotatably support the rotational drum member (1351). The plurality of rotational support rollers (1352c) support the outer surface of the rotational drum member (1351) from below and support the self-weight of the rotational drum member (1351) and the load of the sorting material. The plurality of rotational support rollers (1352c) may additionally be equipped with thrust rollers that prevent axial deviation of the rotational drum member (1351).

[0089] The drum inclination support member (1353) supports the rotating drum member (1351) at an incline such that the input side is higher and the discharge side is lower. The drum inclination support member (1353) includes an inclination frame (1353a) and an inclination adjuster (1353b).

[0090] The inclined frame (1353a) is a structure that supports the rotating drum member (1351) and the drum rotation drive member (1352) in an inclined state, and is configured to allow the inclination angle to be adjusted in the range of 3 to 7 degrees. The inclination angle of the inclined frame (1353a) is set according to the input amount, characteristics, and target residence time of the material to be sorted, and the larger the inclination angle, the faster the movement speed of the material to be sorted and the shorter the residence time.

[0091] The inclination adjuster (1353b) finely adjusts the inclination angle of the inclination frame (1353a). The inclination adjuster (1353b) is configured as a screw jack or hydraulic cylinder type and continuously adjusts the inclination angle by raising and lowering one end of the inclination frame (1353a).

[0092] The particle size discharge section (1360) is positioned below the trommel main body section (1350) and guides the sorted materials classified by a plurality of particle size sections to the corresponding eddy current sorting section of the eddy current sorting unit (1400).

[0093] The particle size discharge unit (1360) includes a dust discharge member (1361), a third particle size discharge member (1362), a second particle size discharge member (1363), a first particle size discharge member (1364), and an oversized particle conveying member (1365).

[0094] The dust discharge member (1361) is positioned at the bottom of the dust removal mesh section module (1351a) and collects dust of 3 mm or less and discharges it to a dust treatment path. The dust collected by the dust discharge member (1361) is transferred to a dust collection device or a dust storage tank and processed separately.

[0095] The third particle size discharge member (1362) is positioned at the bottom of the third mesh section module (1351b) and collects particles of 3 mm or more and 10 mm or less, and transports them to the third eddy current sorting unit (1430). The third particle size discharge member (1362) is equipped with a collection hopper located below the third mesh section module (1351b) and an inclined vibrating conveyor or inclined chute connected to the bottom of the collection hopper to guide the material to be sorted to the third input member (1431) of the third eddy current sorting unit (1430). Since fine particles are prone to adhering to or becoming stagnant on the inner surface of the inclined chute, a vibration excitation device is added to the transport means of the third particle size discharge member (1362) to ensure smooth transport of fine particles.

[0096] The second particle size discharge member (1363) is positioned at the bottom of the second mesh section module (1351c) and collects particles greater than 10 mm and less than or equal to 20 mm and transfers them to the second eddy current sorting unit (1420). The second particle size discharge member (1363) is equipped with a collection hopper and an inclined chute that guides the material to be sorted from the collection hopper to the second input member (1421) of the second eddy current sorting unit (1420), and the inclination angle of the chute is set so that particles in the range of 10 mm to 20 mm slide smoothly due to their own weight.

[0097] The first particle size discharge member (1364) is positioned at the bottom of the first mesh section module (1351d) and collects particles of 20 mm or more and 40 mm or less and transfers them to the first eddy current sorting unit (1410). The first particle size discharge member (1364) is equipped with a collection hopper and an inclined chute that guides the material to be sorted from the collection hopper to the first input member (1411) of the first eddy current sorting unit (1410), and an impact-resistant lining is attached to the inner surface of the chute to prevent impact and wear caused by large particles colliding with the inner surface of the chute.

[0098] The oversized particle conveying member (1365) collects particles exceeding 40 mm that did not pass through the first mesh section module (1351d) and conveys them to the crusher. After the oversized particles are crushed in the crusher by the oversized particle conveying member (1365), they are reintroduced into the particle size classification unit (1300), thereby improving the recovery rate of non-ferrous metals contained in the mixed waste.

[0099] The eddy current separation unit (1400) is connected to the particle size classification unit (1300) and is arranged in parallel corresponding to each of the multiple particle size sections, and receives the material to be separated for each particle size section and separates non-ferrous metals by eddy current. The eddy current separation unit (1400) includes a first eddy current separation section (1410) corresponding to the first particle size section (1310), a second eddy current separation section (1420) corresponding to the second particle size section (1320), and a third eddy current separation section (1430) corresponding to the third particle size section (1330).

[0100] The first eddy current sorting section (1410), the second eddy current sorting section (1420), and the third eddy current sorting section (1430) are each formed in a structure that extends along the cross direction within the frame unit (1100).

[0101] The first eddy current sorting unit (1410), the second eddy current sorting unit (1420), and the third eddy current sorting unit (1430) each have different pole numbers and magnetic field strengths depending on the size of the material to be sorted in the corresponding particle size range. Specifically, as the particle size of the material to be sorted decreases, the number of poles of the magnetic rotor module of the corresponding eddy current sorting unit increases, the magnetic field strength increases, the rotational speed increases, and the thickness of the belt module decreases. By doing so, it is possible to induce and sort eddy currents that are effective not only for large non-ferrous metals but also for fine non-ferrous metals of 3 mm to 10 mm.

[0102] The principle of sorting non-ferrous metals by eddy currents is as follows. When the magnetic rotor module rotates at high speed, a time-varying magnetic field is formed by alternating permanent magnets. When this fluctuating magnetic field acts on non-ferrous metals (conductive non-magnetic metals including aluminum, copper, and brass) among the materials being sorted during transport, eddy currents are induced within the non-ferrous metals according to Faraday's law of electromagnetic induction. The induced eddy currents form a magnetic field in a direction opposing the original magnetic field according to Lenz's law, and as a result, a repulsive force (Lorentz force) acts on the non-ferrous metals, causing the non-ferrous metals to be ejected forward from the end of the belt module. At this time, the strength of the eddy currents is proportional to the electrical conductivity of the non-ferrous metals, the volume of the particles, the time variation rate of the magnetic field (i.e., magnetic field variation frequency), and the spatial variation rate of the magnetic field (i.e., magnetic field gradient). Therefore, in fine non-ferrous metals with small particle volumes, the strength of eddy currents weakens, so it is necessary to compensate by increasing the magnetic field fluctuation frequency, increasing the magnetic field gradient, and strengthening the magnetic field strength itself. On the other hand, since eddy currents are not induced in non-conductive materials (non-conductive materials including plastic, glass, wood, and stone), no repulsive force acts, and they naturally fall from the end of the belt module due to gravity. By utilizing the difference between the ejection trajectory of these non-ferrous metals and the natural fall trajectory of the non-conductive materials, the non-ferrous metals and non-conductive materials are physically separated by a splitter module.

[0103] The first eddy current sorting unit (1410) is positioned to correspond to the first particle size section (1310) (20mm to 40mm) of the particle size classification unit (1300), and receives the material to be sorted in the first particle size section (1310) and sorts non-ferrous metals by eddy current. Since the first eddy current sorting unit (1410) processes relatively large material to be sorted, it is configured with specifications capable of generating sufficient eddy current repulsion force corresponding to the volume and mass of the material to be sorted.

[0104] The first eddy current sorting unit (1410) includes a first input member (1411), a first transfer member (1412), a first eddy current generating member (1413), a first separation collection member (1414), and a first vision inspection member (1415).

[0105] The first input member (1411) is connected to an outlet corresponding to the first particle size section (1310) of the particle size classification unit (1300) to receive the material to be sorted in the first particle size section (1310). The first input member (1411) is positioned above the input side of the first conveying member (1412) to uniformly supply the received material to be sorted onto the first conveying member (1412).

[0106] The first input member (1411) includes a first input hopper module (1411a), a first input amount control gate module (1411b), and a first vibration feeder module (1411c).

[0107] The first input hopper module (1411a) is formed in a funnel shape that is wide at the top and narrows toward the bottom, is connected to an outlet corresponding to the first particle size section (1310) of the particle size classification unit (1300), and has a space inside to accommodate the material to be sorted. The first input hopper module (1411a) accommodates material to be sorted ranging from 20mm to 40mm that is transported through an inclined chute from the first particle size discharge member (1364) of the particle size classification unit (1300), and guides the accommodated material to the first input amount control gate module (1411b) below. The inner wall surface of the first input hopper module (1411a) is formed at an appropriate angle of inclination to prevent bridging of the material to be sorted, and a wear-resistant lining is attached to reduce wear caused by the material to be sorted.

[0108] The first input amount control gate module (1411b) is installed at the lower opening of the first input hopper module (1411a) and varies the opening area to control the input amount of the material to be sorted. The first input amount control gate module (1411b) is equipped with a sliding gate plate, and the opening area can be continuously changed by adjusting the position of the gate plate. By controlling the input amount of the material to be sorted supplied to the first transport member (1412) by the first input amount control gate module (1411b), the material to be sorted is prevented from being overloaded on the first belt module (1412a) and the material to be sorted is transported in a single layer state. When the material to be sorted is transported in a single layer, each particle is individually exposed to a magnetic field in the eddy current generation area, thereby improving sorting accuracy.

[0109] The first vibrating feeder module (1411c) is positioned below the first input amount control gate module (1411b) and vibrates by an eccentric weight vibrating motor to uniformly disperse the material to be sorted in the width direction of the first conveying member (1412) and supply it in a single layer. The first vibrating feeder module (1411c) applies vibration to the tray using the centrifugal force generated by the rotation of the eccentric weight vibrating motor, and the material to be sorted on the tray is dispersed in the width direction and supplied uniformly across the entire width of the first belt module (1412a). As the material to be sorted is uniformly distributed without bias in the belt width direction, the repulsive force caused by eddy currents acts evenly on each particle, thereby maximizing sorting efficiency.

[0110] The first conveying member (1412) is positioned below the first input member (1411) and conveys the material to be sorted supplied from the first input member (1411). The first conveying member (1412) is configured as a belt conveyor and conveys the material to be sorted to the magnetic field area of ​​the first eddy current generating member (1413).

[0111] The first conveying member (1412) includes a first belt module (1412a), a first tail drum module (1412b), a first support roller module (1412c), and a first belt drive module (1412d).

[0112] The first belt module (1412a) is formed of a non-conductive PVC material, has a thickness of 3 mm to 5 mm, and a width of 600 mm to 1000 mm. Since the first belt module (1412a) is formed of a non-conductive material, the fluctuating magnetic field formed by the first magnet rotor module (1413b) does not induce eddy currents in the first belt module (1412a) itself, thereby preventing loss of magnetic field energy and effectively transmitting the fluctuating magnetic field to the sorting material. The PVC material is adopted for the first belt module (1412a), and the PVC material has impact resistance that effectively absorbs the impact generated when large sorting materials in the range of 20 mm to 40 mm fall onto the belt surface. It is more economical than polyurethane (PU) material, thereby reducing operating costs in the first eddy current sorting unit (1410), where the belt replacement cycle due to the impact of large particles is relatively short. The thickness of the first belt module (1412a) is set to 3 mm to 5 mm, which is determined within a range that stably supports the load of a relatively large object to be sorted from 20 mm to 40 mm while not excessively increasing the distance between the first magnet rotor module (1413b) and the object to be sorted. Since large non-ferrous metals in the 20 mm to 40 mm range have a large volume, the effect of magnetic field attenuation due to belt thickness is relatively small, so sufficient eddy current induction is possible even with a belt thickness of 3 mm to 5 mm.

[0113] The first tail drum module (1412b) is positioned at the input end of the first belt module (1412a), is formed of non-magnetic stainless steel, and has a diameter of 150 mm to 200 mm. A rubber lagging is formed on the outer surface of the first tail drum module (1412b) to secure frictional force with the first belt module (1412a), and both ends of the first tail drum module (1412b) are rotatably supported by pillow block bearings. The pillow block bearings stably support the shaft of the first tail drum module (1412b) to the frame while enabling smooth rotation, and automatically compensate for shaft alignment errors to reduce the meandering of the first belt module (1412a).

[0114] The first support roller module (1412c) includes a plurality of upper carrier rollers (1412ca) arranged at intervals of 300 mm to 500 mm to support the upper conveying surface of the first belt module (1412a), and a plurality of lower return rollers (1412cb) that support the lower return surface of the first belt module (1412a). The plurality of upper carrier rollers (1412ca) prevent sagging of the first belt module (1412a) due to the load of the material to be sorted, thereby maintaining the flatness of the conveying surface, so that the material to be sorted is exposed to the magnetic field at a uniform height when it reaches the magnetic field region of the first eddy current generating member (1413). The plurality of lower return rollers (1412cb) prevent the return surface of the first belt module (1412a) from coming into contact with the ground or a frame structure and wearing out.

[0115] The first belt drive module (1412d) includes a three-phase induction motor (1412da), a helical reduction gear (1412db) connected to the three-phase induction motor (1412da), and a drive pulley (1412dc) coupled to the output shaft of the helical reduction gear (1412db) to transmit power to the shaft of the first tail drum module (1412b). The first belt drive module (1412d) drives the feed speed of the first belt module (1412a) to 1.0 m / s to 1.5 m / s. The three-phase induction motor (1412da) generates stable rotational force, and the helical reduction gear (1412db) converts the high-speed rotation of the three-phase induction motor (1412da) into low-speed high-torque and transmits it to the drive pulley (1412dc). The helical reducer (1412db) reduces vibration and noise through the meshing method of the helical gear and has high power transmission efficiency. The drive pulley (1412dc) transmits rotational force to the shaft of the first tail drum module (1412b) via a belt or chain. The feed speed of the first belt module (1412a) is set to 1.0 m / s to 1.5 m / s, which is a range set so that a relatively large object to be sorted in the range of 20 mm to 40 mm can pass through the magnetic field area of ​​the first eddy current generating member (1413) at an appropriate speed and receive sufficient eddy current repulsion force.

[0116] The first eddy current generating member (1413) is disposed at the discharge end of the first conveying member (1412) and is equipped with a first magnet rotor module (1413b) in which a plurality of permanent magnets are arranged in alternating polarity, and generates eddy currents on the object to be selected by the rotation of the first magnet rotor module (1413b). The first eddy current generating member (1413) is located at the discharge side head portion of the first conveying member (1412), and is configured so that the first belt module (1412a) rotates while surrounding the first eddy current generating member (1413).

[0117] The first eddy current generating member (1413) includes a first head drum module (1413a), a first magnet rotor module (1413b), and a first rotor driving module (1413c).

[0118] The first head drum module (1413a) is cylindrical, formed of non-magnetic stainless steel, has a diameter of 300 mm to 400 mm, and has a polytetrafluoroethylene (PTFE) lubricating coating formed on its outer surface. The first head drum module (1413a) is fixedly positioned on the frame without rotating and supports the first belt module (1412a) to rotate while wrapping around the outer surface of the first head drum module (1413a). Since the first head drum module (1413a) is formed of non-magnetic stainless steel, the magnetic field formed by the first magnet rotor module (1413b) is not shielded by the first head drum module (1413a) and is transmitted to the outside. The PTFE lubricating coating formed on the outer surface of the first head drum module (1413a) reduces friction between the inner surface of the first belt module (1412a) and the outer surface of the first head drum module (1413a), thereby allowing the first belt module (1412a) to run smoothly on the outer surface of the first head drum module (1413a), and suppressing belt wear and heat generation caused by friction. Since the first head drum module (1413a) is formed of non-magnetic stainless steel, corrosion of the first head drum module (1413a) is suppressed even in an environment where the sorted material is transported in a wet state due to the inclusion of moisture in the mixed waste. Since the PTFE lubricating coating is hydrophobic, even if moisture remains on the inner surface of the first belt module (1412a) in a humid environment, the friction characteristics between the first belt module (1412a) and the first head drum module (1413a) are stably maintained, and the phenomenon of the selected material adhering to the surface of the first belt module (1412a) due to moisture contained in the selected material is reduced.

[0119] The first magnet rotor module (1413b) is arranged concentrically inside the first head drum module (1413a). By arranging the first magnet rotor module (1413b) concentrically inside the first head drum module (1413a), a uniform fluctuating magnetic field is formed across the entire outer surface of the first head drum module (1413a) when the first magnet rotor module (1413b) rotates. The adoption of concentric arrangement in the first eddy current sorting unit (1410) is due to the following technical reasons. First, since large non-ferrous metals in the range of 20mm to 40mm have a sufficiently large volume, even if the strength of the magnetic field is attenuated somewhat by distance, the absolute amount of eddy currents induced inside the non-ferrous metal is sufficient, and therefore, the effect of magnetic field attenuation caused by the wall thickness of the first head drum module (1413a) on sorting performance is relatively small. Second, since a uniform gap is maintained between the inner surface of the first magnet rotor module (1413b) and the first head drum module (1413a) by concentric arrangement, vibrations generated during high-speed rotation of the first magnet rotor module (1413b) are not transmitted unevenly to the first head drum module (1413a), thereby ensuring the driving stability of the first belt module (1412a). Third, in concentric arrangement, the first magnet rotor module (1413b) does not come into direct contact with the inner surface of the first belt module (1412a), so wear of the first belt module (1412a) due to contact does not occur, extending the lifespan of the belt and reducing maintenance costs. This is advantageous in that it does not further increase belt wear in the first eddy current sorting unit (1410), where belt replacement is relatively frequent due to the impact of large particles.

[0120] The first magnet rotor module (1413b) has 12 poles of NdFeB grade N35 to N42 permanent magnets arranged so that the N poles and S poles alternate on the outer surface of a rotor core formed of non-magnetic alloy steel. The first magnet rotor module (1413b) forms a first magnetic field strength of 3,000 to 5,000 gauss on the surface of the first belt module (1412a). The number of poles is set so that the spacing between each pole is sufficiently wider than the size of the object to be selected, corresponding to a large object to be selected in the range of 20 mm to 40 mm, thereby effectively inducing eddy currents throughout the object to be selected. A permanent magnet of grade NdFeB N35 to N42 is adopted in the first magnet rotor module (1413b), which is a grade that can be procured at an economical cost compared to high-grade magnets (N48 or higher) while achieving the magnetic field strength (3,000 to 5,000 gauss) required for sorting large non-ferrous metals in the range of 20 mm to 40 mm. Since large non-ferrous metals have a large volume, sufficient eddy currents are induced and sorting is possible even at a relatively low magnetic field strength, so there is no need to incur an increase in cost due to the use of high-grade magnets.

[0121] The first rotor drive module (1413c) includes a three-phase induction motor connected to the shaft of the first magnet rotor module (1413b) and an inverter that variably controls the rotational speed of the three-phase induction motor to 1,500 rpm to 2,000 rpm. The first rotor drive module (1413c) drives the rotational direction of the first magnet rotor module (1413b) to selectably be the same direction as or opposite to the movement direction of the first belt module (1412a). When the rotational direction of the first magnet rotor module (1413b) is set to the same direction as the movement direction of the first belt module (1412a), the injection distance of the non-ferrous metal increases, and the separation gap between the non-ferrous metal and the non-conductor is expanded. When the rotational direction of the first magnetic rotor module (1413b) is set to be opposite to the movement direction of the first belt module (1412a), the relative speed between the first belt module (1412a) and the first magnetic rotor module (1413b) increases, thereby increasing the frequency of the fluctuating magnetic field and increasing the strength of the eddy current. By variably controlling the rotational speed in the range of 1,500 rpm to 2,000 rpm by the inverter, it is possible to adjust the optimal eddy current repulsion force according to the material and size of the object to be selected.

[0122] The first separation collection member (1414) is positioned below the first eddy current generating member (1413) and separates and collects non-ferrous metals ejected by eddy current repulsion and non-conductive materials that fall naturally.

[0123] The first separation and collection member (1414) includes a first splitter module (1414a), a first magnetic material collection hopper module (1414b), a first non-magnetic material collection hopper module (1414c), and a first non-ferrous metal collection hopper module (1414d).

[0124] The first splitter module (1414a) is positioned in front of the discharge side of the first head drum module (1413a) and can be positioned within a horizontal distance of 200 mm to 400 mm from the center of the first head drum module (1413a). The first splitter module (1414a) can be finely positioned in the horizontal and vertical directions by means of an elongated slot (SL1), thereby precisely setting the separation boundary between the injection trajectory of the non-ferrous metal and the drop trajectory of the non-conductive material. The first splitter module (1414a) is formed as a plate-shaped separator, and the upper edge of the separator is adjusted to be positioned at the boundary between the injection trajectory of the non-ferrous metal and the drop trajectory of the non-conductive material.

[0125] The first magnetic material collection hopper module (1414b) is positioned directly below the first head drum module (1413a) to collect residual magnetic materials. Although most magnetic materials are removed in the magnetic separation unit (1200), a small amount of magnetic material may remain, and this residual magnetic material falls directly below the first head drum module (1413a). The first magnetic material collection hopper module (1414b) captures this residual magnetic material to prevent it from being mixed into the non-ferrous metal collection hopper and the non-magnetic material collection hopper.

[0126] The first non-magnetic material collection hopper module (1414c) is positioned on the side closer to the first head drum module (1413a) relative to the first splitter module (1414a) and collects non-conductive materials that naturally fall from the end of the first belt module (1412a).

[0127] The first non-ferrous metal collection hopper module (1414d) is positioned on the side far from the first head drum module (1413a) relative to the first splitter module (1414a) and collects non-ferrous metals ejected by eddy current repulsion.

[0128] The first vision inspection member (1415) is positioned in the first separation and collection member (1414) and photographs non-ferrous metals and non-conductive materials collected by the first separation and collection member (1414). The first vision inspection member (1415) includes a first camera module (1415a) and a first lighting module (1415b).

[0129] The first camera module (1415a) is positioned above the first non-ferrous metal collection hopper module (1414d) and captures the trajectory and distribution of non-ferrous metals falling into the first non-ferrous metal collection hopper module (1414d). The first camera module (1415a) is composed of a high-resolution industrial camera and acquires image data in real time, including the size, shape, color, and falling position of non-ferrous metal particles. The image data acquired by the first camera module (1415a) is transmitted to the image processing unit (1510) of the control unit (1500).

[0130] The first lighting module (1415b) is positioned corresponding to the first camera module (1415a) to illuminate the shooting area. The first lighting module (1415b) is composed of LED lighting and provides uniform illumination to the shooting area, enabling the first camera module (1415a) to acquire a clear image. The illumination of the first lighting module (1415b) is set sufficiently high to minimize the influence of external ambient light, and is operated in a flicker-free continuous lighting manner to ensure stable image quality even during high-speed shooting.

[0131] The second eddy current sorting unit (1420) is positioned to correspond to the second particle size section (1320) (10mm to 20mm) of the particle size classification unit (1300), and receives the material to be sorted in the second particle size section (1320) to sort non-ferrous metals by eddy current. Since the second eddy current sorting unit (1420) processes a material to be sorted that is relatively small compared to the first eddy current sorting unit (1410), the number of poles is increased in correspondence with the size of the material to be sorted, the magnetic field strength is strengthened, and an eccentric arrangement structure and a slit structure are applied to shorten the distance between the magnet rotor module and the material to be sorted.

[0132] The second eddy current sorting unit (1420) includes a second input member (1421), a second transfer member (1422), a second eddy current generating member (1423), a second separation collection member (1424), and a second vision inspection member (1425).

[0133] The second input member (1421) is connected to an outlet corresponding to the second particle size section (1320) of the particle size classification unit (1300) and receives the material to be sorted in the second particle size section (1320). The second input member (1421) is positioned above the input side of the second conveying member (1422).

[0134] The second input member (1421) includes a second input hopper module (1421a), a second input amount control gate module (1421b), and a second vibration feeder module (1421c).

[0135] The second input hopper module (1421a) is formed in a funnel shape that is wide at the top and narrows toward the bottom, and is connected to an outlet corresponding to the second particle size section (1320) of the particle size classification unit (1300). The second input hopper module (1421a) receives a sorting material of 10mm to 20mm that is transported through an inclined chute from the second particle size discharge member (1363) of the particle size classification unit (1300).

[0136] The second input amount control gate module (1421b) is installed at the lower opening of the second input hopper module (1421a). The second input amount control gate module (1421b) adjusts the opening area so that the material to be sorted is supplied in a single layer on the second belt module (1422a), and is configured to enable more precise opening area control than the first input amount control gate module (1411b) in correspondence with the size of the material to be sorted in the range of 10mm to 20mm.

[0137] The second vibrating feeder module (1421c) is positioned below the second input amount control gate module (1421b) and is driven by an eccentric weight vibrating motor with an amplitude of 1.5 mm to 3.0 mm to distribute and supply the sorted material of the second particle size section (1320) in a single layer in the width direction of the second conveying member (1422).

[0138] The second conveying member (1422) is positioned below the second input member (1421) and conveys the material to be sorted supplied from the second input member (1421). Compared to the first conveying member (1412), the belt thickness of the second conveying member (1422) is reduced and the conveying speed is set to be slower in response to the reduction in the particle size of the material to be sorted.

[0139] The second transfer member (1422) includes a second belt module (1422a), a second tail drum module (1422b), a second support roller module (1422c), and a second belt drive module (1422d).

[0140] The second belt module (1422a) is formed of a non-conductive polyurethane (PU) material and has a thickness of 2 mm to 3 mm, and is formed to be thinner than the first belt module (1412a). Since the second belt module (1422a) is formed to be thinner than the first belt module (1412a), the distance between the second magnet rotor module (1423b) and the object to be selected on the surface of the second belt module (1422a) is shortened compared to the distance at the first eddy current sorting section (1410), thereby improving the strength of the magnetic field reaching the object to be selected. Polyurethane (PU) material is adopted for the second belt module (1422a), and since PU material has superior wear resistance and cut resistance compared to PVC material, the durability of the belt is maintained even if the thickness is reduced. Since PU material has higher tear strength than PVC material, rupture caused by tension and bending during operation is prevented even when the belt thickness is reduced to 2mm to 3mm.

[0141] The second tail drum module (1422b) is positioned at the input end of the second belt module (1422a), is formed of non-magnetic stainless steel, and has a diameter of 120 mm to 160 mm. Ceramic lagging is formed on the outer surface of the second tail drum module (1422b). Compared to rubber lagging, ceramic lagging has superior wear resistance, a stable coefficient of friction with the belt, and reduces slip even in wet environments.

[0142] The second support roller module (1422c) supports the upper transfer surface and the lower return surface of the second belt module (1422a). The second support roller module (1422c) has roller spacing that is more densely arranged to correspond to the thin thickness of the second belt module (1422a), thereby minimizing belt sagging.

[0143] The second belt drive module (1422d) drives the second belt module (1422a) at a transfer speed of 0.5 m / s to 0.8 m / s, but is set slower than the transfer speed of the first belt module (1412a) by the first belt drive module (1412d). By setting the transfer speed of the second belt module (1422a) slower than the transfer speed of the first belt module (1412a), the time the sorting object stays in the magnetic field region of the second eddy current generating member (1423) increases. Since medium-sized sorting objects in the range of 10 mm to 20 mm have a smaller volume than large sorting objects, the absolute amount of induced eddy current decreases; therefore, to compensate for this, the time of stay in the magnetic field region is extended to secure the cumulative exposure amount to the fluctuating magnetic field. In the second eddy current sorting section (1420), a strategy is adopted to reduce the transport speed to secure residence time, because in the case of medium-sized particles in the range of 10 mm to 20 mm, the stacking thickness on the belt is relatively thin compared to fine particles (3 mm to 10 mm), so the problem of multi-layer stacking due to speed reduction does not occur.

[0144] The second eddy current generating member (1423) is disposed at the discharge end of the second conveying member (1422) and is equipped with a second magnet rotor module (1423b) in which a plurality of permanent magnets are arranged in alternating polarity, and generates eddy currents on the object to be selected by the rotation of the second magnet rotor module (1423b).

[0145] The second eddy current generating member (1423) includes a second head drum module (1423a), a second magnet rotor module (1423b), and a second rotor driving module (1423c).

[0146] The second head drum module (1423a) is cylindrical, formed of non-magnetic stainless steel, and has a diameter of 280 mm to 350 mm. A slit having a predetermined width is formed in the longitudinal direction of the second head drum module (1423a), and a PTFE lubricating coating is formed on the outer surface of the non-slit area. The second head drum module (1423a) is fixedly positioned on the frame without rotating. The slit of the second head drum module (1423a) causes the second magnet rotor module (1423b) to come into direct contact with the inner surface of the second belt module (1422a), thereby shortening the distance between the second magnet rotor module (1423b) and the object to be sorted by the thickness of the second head drum module (1423a) compared to the first head drum module (1413a) of the first eddy current sorting unit (1410), thereby improving the magnetic field reach efficiency.

[0147] The second magnetic rotor module (1423b) is eccentrically positioned inside the second head drum module (1423a) so that the center of the rotor is offset from the center of the second head drum module (1423a). The second magnetic rotor module (1423b) is configured to make direct contact with the inner surface of the second belt module (1422a) through a slit in the second head drum module (1423a). In the second magnetic rotor module (1423b), permanent magnets of grade NdFeB N42 to N48 are arranged in 22 poles such that the N pole and S pole alternate, and a second magnetic field strength of 5,000 to 8,000 gauss is formed on the surface of the second belt module (1422a). Permanent magnets of grades N42 to N48 of NdFeB have a higher residual magnetic flux density than grades N35 to N42 and are adopted to achieve the enhanced magnetic field strength required for sorting medium-sized non-ferrous metals in the range of 10 mm to 20 mm. Since medium-sized non-ferrous metals have a smaller volume compared to large-sized non-ferrous metals, it is difficult to induce eddy currents; therefore, this is compensated for by increasing the magnetic field strength through upgrading the magnet grade, and the resulting increase in magnet costs is offset by economic benefits from improved recovery rates of medium-sized non-ferrous metals.

[0148] In a structure where the second magnet rotor module (1423b) is in direct contact with the inner surface of the second belt module (1422a), friction occurs between the outer surface of the second magnet rotor module (1423b) and the inner surface of the second belt module (1422a). To manage the wear on the inner surface of the second belt module (1422a) caused by this contact friction, lubrication treatment may be applied to the inner surface of the second belt module (1422a), and a wear-resistant coating may be formed on the outer surface of the second magnet rotor module (1423b). The replacement cycle of the second belt module (1422a) is set by regularly checking the condition of the inner surface wear caused by contact friction, and the predictive maintenance member (1524) can predict the belt replacement time in advance by analyzing the trend of change in sorting quality.

[0149] The second rotor drive module (1423c) is connected to the shaft of the second magnet rotor module (1423b) and variably controls the rotational speed of the second magnet rotor module (1423b) to 2,500 rpm to 3,000 rpm. The second rotor drive module (1423c) drives the rotational direction of the second magnet rotor module (1423b) in a direction opposite to the movement direction of the second belt module (1422a) to maximize the relative speed between the second belt module (1422a) and the second magnet rotor module (1423b).

[0150] The second separation collection member (1424) is positioned below the second eddy current generating member (1423) and separates and collects non-ferrous metals ejected by eddy current repulsion and non-conductive materials that fall naturally.

[0151] The second separation and collection member (1424) includes a second splitter module (1424a), a second magnetic material collection hopper module (1424b), a second non-magnetic material collection hopper module (1424c), and a second non-ferrous metal collection hopper module (1424d).

[0152] The second splitter module (1424a) is positioned in front of the discharge side of the second head drum module (1423a) and its position can be adjusted within a horizontal distance of 150 mm to 300 mm from the center of the second head drum module (1423a).

[0153] The second magnetic material collection hopper module (1424b) is positioned directly below the second head drum module (1423a) to collect residual magnetic materials.

[0154] The second non-magnetic material collection hopper module (1424c) is positioned on the side closer to the second head drum module (1423a) relative to the second splitter module (1424a) to collect naturally falling non-magnetic materials.

[0155] The second non-ferrous metal collection hopper module (1424d) is positioned on the side far from the second head drum module (1423a) relative to the second splitter module (1424a) and collects non-ferrous metals ejected by eddy current repulsion.

[0156] The second vision inspection member (1425) is positioned in the second separation collection member (1424) and photographs non-ferrous metals and non-conductive materials collected by the second separation collection member (1424). The second vision inspection member (1425) includes a second camera module (1425a) and a second lighting module (1425b).

[0157] The second camera module (1425a) is positioned above the second non-ferrous metal collection hopper module (1424d) to capture the trajectory and distribution of non-ferrous metals falling into the second non-ferrous metal collection hopper module (1424d). The image data acquired by the second camera module (1425a) is transmitted to the image processing unit (1510) of the control unit (1500).

[0158] The second lighting module (1425b) is positioned corresponding to the second camera module (1425a) to illuminate the shooting area.

[0159] The third eddy current sorting unit (1430) is positioned in correspondence with the third particle size section (1330) (3mm to 10mm) of the particle size classification unit (1300), and receives the material to be sorted in the third particle size section (1330) to sort non-ferrous metals by eddy current. The third eddy current sorting unit (1430) is a configuration that embodies the core technical features of the present invention and effectively sorts fine non-ferrous metals in the range of 3mm to 10mm, which were difficult to sort in conventional eddy current sorters.

[0160] The third eddy current sorting unit (1430) includes a third input member (1431), a third transfer member (1432), a third eddy current generating member (1433), a third separation collection member (1434), and a third vision inspection member (1435).

[0161] The third input member (1431) is connected to an outlet corresponding to the third particle size section (1330) of the particle size classification unit (1300) and receives the sorted material of the third particle size section (1330).

[0162] The third input member (1431) includes a third input hopper module (1431a), a third input amount control gate module (1431b), and a third vibration feeder module (1431c).

[0163] The third input hopper module (1431a) is formed in a funnel shape that is wide at the top and narrows toward the bottom, and is connected to an outlet corresponding to the third particle size section (1330) of the particle size classification unit (1300). The inner wall surface of the third input hopper module (1431a) is processed to have a low surface roughness to prevent the attachment and stagnation of fine particles, and the inclination angle of the inner wall surface is formed as a steep slope so that fine particles descend smoothly due to their own weight.

[0164] The third input amount control gate module (1431b) is installed at the lower opening of the third input hopper module (1431a), and the opening amount is precisely limited to prevent excessive input of fine particles ranging from 3mm to 10mm. Since the number of fine particles passing through per unit time in the same opening area is significantly higher than that of large particles, the third input amount control gate module (1431b) is formed as a precision gate structure capable of finely controlling the opening amount.

[0165] The third vibration feeder module (1431c) is positioned below the third input amount control gate module (1431b) and is configured as a high-frequency micro-vibration type with an amplitude of 0.5 mm to 1.5 mm to disperse fine particles of the third particle size section (1330) into a uniform single layer in the width direction of the third conveying member (1432).

[0166] The third transfer member (1432) is positioned below the third input member (1431) and transfers the selected material supplied from the third input member (1431).

[0167] The third transfer member (1432) includes a third belt module (1432a), a third tail drum module (1432b), a third support roller module (1432c), and a third belt drive module (1432d).

[0168] The third belt module (1432a) is formed of a non-conductive polyurethane (PU) material, has a fabric reinforcement layer inserted inside, and is formed as an ultra-thin type with a thickness of 1.5 mm to 2.4 mm, thinner than the first belt module (1412a) and the second belt module (1422a). By forming the third belt module (1432a) thinner than the first belt module (1412a) and the second belt module (1422a), the distance between the third magnet rotor module (1433b) and the object to be selected on the surface of the third belt module (1432a) is minimized. Since the strength of the magnetic field rapidly attenuates inversely proportional to the cube of the distance from the magnet rotor module, minimizing the belt thickness to reduce the distance between the magnet rotor module and the object to be selected is very effective in improving the eddy current induction effect on fine non-ferrous metals. The fabric reinforcement layer inserted inside the third belt module (1432a) reinforces the tensile strength and dimensional stability of the ultra-thin belt. The fabric reinforcement layer can be formed from polyester or nylon fabric and is embedded and integrated within a polyurethane matrix. Since the fabric reinforcement layer is formed from a non-conductive fiber material, the fabric reinforcement layer does not hinder the transmission of the fluctuating magnetic field by the third magnet rotor module (1433b), and thus the insertion of the fabric reinforcement layer does not adversely affect the eddy current separation performance.

[0169] The third tail drum module (1432b) is positioned at the input end of the third belt module (1432a), is formed of non-magnetic stainless steel, and has a diameter of 100 mm to 140 mm. Ceramic lagging is formed on the outer surface of the third tail drum module (1432b).

[0170] The third support roller module (1432c) is spaced 200mm to 300mm apart to minimize the sagging of the third belt module (1432a).

[0171] The third belt drive module (1432d) drives the third belt module (1432a) at a conveying speed of 0.8 m / s to 1.2 m / s, but is set faster than the conveying speed of the second belt module (1422a) by the second belt drive module (1422d). By setting the conveying speed of the third belt module (1432a) faster than the conveying speed of the second belt module (1422a), the stacking thickness of the sorting material on the third belt module (1432a) is reduced relative to the same input amount, and accordingly, the sorting material is conveyed in a single layer. Since fine particles of 3 mm to 10 mm have a small volume and therefore a very large number of particles even with the same input amount, a single-layer conveying state is secured by increasing the conveying speed to reduce the number of particles stacked per unit area. The strategy of increasing the transport speed in the third eddy current sorting unit (1430) is contrary to the strategy of decreasing the transport speed in the second eddy current sorting unit (1420), which is due to the following trade-off. In the case of medium-sized particles (10 mm to 20 mm), the amount of eddy current induction relative to volume is insufficient, so extending the residence time is more important, whereas in the case of fine particles (3 mm to 10 mm), the number of particles is very large, so mutual shielding between particles due to multi-layer stacking reduces the sorting efficiency more significantly, so securing single-layer transport is prioritized over securing residence time. The insufficient amount of eddy current induction in fine particles is compensated not by increasing the transport speed, but by increasing the number of poles, strengthening the magnetic field strength, eccentric arrangement, and ultra-thin belts.

[0172] The third eddy current generating member (1433) is disposed at the discharge end of the third conveying member (1432) and is equipped with a third magnet rotor module (1433b) in which a plurality of permanent magnets are arranged in alternating polarity, and generates eddy currents on the object to be selected by the rotation of the third magnet rotor module (1433b).

[0173] The third eddy current generating member (1433) includes a third head drum module (1433a), a third magnet rotor module (1433b), and a third rotor driving module (1433c).

[0174] The third head drum module (1433a) is cylindrical, formed of non-magnetic stainless steel, with a diameter of 250 mm to 320 mm, and has a slit formed in the longitudinal direction with a predetermined width, and is configured so that the third magnet rotor module (1433b) directly contacts the inner surface of the third belt module (1432a) through the slit. A PTFE lubricating coating is formed on the outer circumference of the non-slit area, and the third head drum module (1433a) is fixedly positioned on the frame without rotating.

[0175] The third magnet rotor module (1433b) is eccentrically positioned inside the third head drum module (1433a). In the third magnet rotor module (1433b), permanent magnets of grades NdFeB N48 to N52 are arranged in 32 to 38 poles such that the N pole and S pole alternate, forming a third magnetic field strength of 8,000 to 12,000 gauss on the surface of the third belt module (1432a). The pole spacing of the third magnet rotor module (1433b) is formed to be 13 mm to 22 mm, corresponding to the size of the material to be sorted in the third particle size section (1330). Grades NdFeB N48 to N52 correspond to the highest grade among currently commercialized NdFeB permanent magnets and are grades in which the maximum energy product (BHmax) is maximized. The reason the highest grade permanent magnet is adopted in the third magnet rotor module (1433b) is that it is inevitable to strengthen the magnetic field strength to the extreme in order to sort fine non-ferrous metals in the range of 3 mm to 10 mm, and the increase in cost due to the high grade magnet is offset by the economic value of recovering fine non-ferrous metals that were previously impossible to recover.

[0176] In a structure where the third magnet rotor module (1433b) is in direct contact with the inner surface of the third belt module (1432a), frictional wear occurs on the inner surface of the third belt module (1432a). To manage the wear on the inner surface of the third belt module (1432a) caused by such contact friction, a low-friction ceramic coating or a DLC (Diamond-Like Carbon) coating may be formed on the outer surface of the third magnet rotor module (1433b), and a lubricating layer may be formed on the inner surface of the third belt module (1432a). The replacement cycle of the third belt module (1432a) is set by regularly checking the condition of the inner surface wear caused by contact friction.

[0177] The third rotor drive module (1433c) is connected to the shaft of the third magnet rotor module (1433b), variably controls the rotational speed of the third magnet rotor module (1433b) to 3,500 rpm to 4,500 rpm, and drives the rotational direction of the third magnet rotor module (1433b) in a direction opposite to the movement direction of the third belt module (1432a).

[0178] In summary, the third eddy current sorting unit (1430) enables sorting by generating an effective eddy current repulsion force even on fine non-ferrous metals in the range of 3 mm to 10 mm, which were difficult to sort in conventional eddy current sorters, through a combination of minimizing the distance between the magnet rotor module and the object to be sorted by an ultra-thin belt, shortening the magnetic field reach distance by eccentric arrangement and slit structure, responding to fine particles with a high number of poles by a high pole arrangement, maximizing magnetic field strength by a high-grade permanent magnet, and maximizing the fluctuating magnetic field frequency by a high rotational speed.

[0179] The third separation collection member (1434) is positioned below the third eddy current generating member (1433) and separates and collects non-ferrous metals ejected by eddy current repulsion and non-conductive materials that fall naturally.

[0180] The third separation and collection member (1434) includes a third splitter module (1434a), a third magnetic material collection hopper module (1434b), a third non-magnetic material collection hopper module (1434c), and a third non-ferrous metal collection hopper module (1434d).

[0181] The third splitter module (1434a) is positioned in front of the discharge side of the third head drum module (1433a) and its position can be adjusted within a horizontal distance of 100 mm to 250 mm from the center of the third head drum module (1433a).

[0182] The third magnetic material collection hopper module (1434b) is positioned directly below the third head drum module (1433a) to collect residual magnetic materials.

[0183] The third non-magnetic material collection hopper module (1434c) is positioned on the side closer to the third head drum module (1433a) relative to the third splitter module (1434a) to collect naturally falling non-magnetic materials.

[0184] The third non-ferrous metal collection hopper module (1434d) is positioned on the side far from the third head drum module (1433a) relative to the third splitter module (1434a) and collects fine non-ferrous metals ejected by eddy current repulsion.

[0185] The third vision inspection member (1435) is positioned in the third separation collection member (1434) and photographs non-ferrous metals and non-conductive materials collected by the third separation collection member (1434). The third vision inspection member (1435) includes a third camera module (1435a) and a third lighting module (1435b).

[0186] The third camera module (1435a) is positioned above the third non-ferrous metal collection hopper module (1434d) to capture the trajectory and distribution of non-ferrous metals falling into the third non-ferrous metal collection hopper module (1434d). The image data acquired by the third camera module (1435a) is transmitted to the image processing unit (1510) of the control unit (1500).

[0187] The third lighting module (1435b) is positioned corresponding to the third camera module (1435a) to illuminate the shooting area.

[0188] The control unit (1500) inspects the condition of non-ferrous metals selected from a plurality of eddy current sorting units and adjusts the sorting conditions of the plurality of eddy current sorting units based on the inspection results. The control unit (1500) includes an image processing unit (1510), an AI analysis unit (1520), and an integrated control unit (1530).

[0189] The image processing unit (1510) receives and processes images captured from the first camera module (1415a) of the first vision inspection member (1415), the second camera module (1425a) of the second vision inspection member (1425), and the third camera module (1435a) of the third vision inspection member (1435).

[0190] The image processing unit (1510) includes a preprocessing member (1511), a contour detection member (1512), a size measurement member (1513), and an incorporation analysis member (1514).

[0191] The preprocessing member (1511) removes noise and enhances contrast of images received from the first camera module (1415a), the second camera module (1425a), and the third camera module (1435a), respectively. The preprocessing member (1511) removes noise components included in the image by applying a Gaussian filter or a median filter, and enhances the contrast between the non-ferrous metal particles and the background by applying histogram equalization or an adaptive contrast enhancement algorithm.

[0192] The contour detection member (1512) detects the contour of a non-ferrous metal particle from an image processed by the preprocessing member (1511). The contour detection member (1512) detects the brightness boundaries within the image by applying a Canny edge detection algorithm or a Sobel operator, and connects the detected edges to form a closed contour of the non-ferrous metal particle.

[0193] The size measuring member (1513) measures the size and shape of a non-ferrous metal particle from the contour detected by the contour detection member (1512). The size measuring member (1513) calculates shape parameters including the area, perimeter, major axis length, minor axis length, aspect ratio, and circularity of the detected contour.

[0194] The mixing analysis member (1514) tracks the drop location of non-ferrous metal particles in each of the first separation collection member (1414), the second separation collection member (1424), and the third separation collection member (1434) to calculate the mixing ratio of non-ferrous metal and non-conductive materials. The mixing analysis member (1514) calculates the ratio of non-conductive materials (mis-separation rate) among the particles dropped into the non-ferrous metal collection hopper module and the ratio of non-ferrous metals (mis-separation rate) among the particles dropped into the non-magnetic material collection hopper module. The mixing ratio calculated by the mixing analysis member (1514) is transmitted to the AI ​​analysis unit (1520) and used as basic data for determining sorting quality and optimizing sorting conditions. In particular, the mis-separation rate and mis-separation rate calculated by the mixing analysis member (1514) are used as direct input data for the optimization member (1522) to calculate the position adjustment amount of the splitter module. For example, if the mis-separation rate exceeds a reference value, the position of the splitter module is moved away from the head drum module, and if the non-separation rate exceeds a reference value, the position of the splitter module is moved closer to the head drum module, so that the result of the mixing analysis member (1514) is reflected in the position of the splitter module through the optimization member (1522).

[0195] The AI ​​analysis unit (1520) analyzes the data transmitted from the image processing unit (1510) using an artificial intelligence algorithm to determine the quality of non-ferrous metal sorting in the first eddy current sorting unit (1410), the second eddy current sorting unit (1420), and the third eddy current sorting unit (1430).

[0196] The AI ​​analysis unit (1520) includes a quality classification unit (1521), an optimization unit (1522), a learning unit (1523), and a prediction maintenance unit (1524).

[0197] The quality classification member (1521) uses a deep learning-based convolutional neural network (CNN) to classify the sorting quality of non-ferrous metals collected in the first non-ferrous metal collection hopper module (1414d) of the first separation and collection member (1414), the second non-ferrous metal collection hopper module (1424d) of the second separation and collection member (1424), and the third non-ferrous metal collection hopper module (1434d) of the third separation and collection member (1434) into appropriate, unseparated, and misseparated. The convolutional neural network (CNN) is composed of multiple convolutional layers, pooling layers, and fully connected layers, and automatically extracts the distribution pattern, drop location, particle density, and shape features of non-ferrous metal particles within an image to classify the sorting quality.

[0198] Based on the classification result of the quality classification member (1521), the optimization member (1522) calculates at least one adjustment amount among the rotational speeds of the first magnet rotor module (1413b), the second magnet rotor module (1423b), and the third magnet rotor module (1433b), the transfer speeds of the first transfer member (1412), the second transfer member (1422), and the third transfer member (1432), and the positions of the first splitter module (1414a) of the first separation and collection member (1414), the second splitter module (1424a) of the second separation and collection member (1424), and the third splitter module (1434a) of the third separation and collection member (1434), using a reinforcement learning algorithm. The reinforcement learning algorithm of the optimization member (1522) receives the current sorting quality state as input, outputs an action including an increase or decrease in rotor rotation speed, an increase or decrease in belt conveying speed, and a change in splitter position, and sets the degree of improvement in sorting quality as a reward, thereby learning an optimal action policy that maximizes the reward.

[0199] The learning unit (1523) accumulates learning data and continuously trains the convolutional neural network and reinforcement learning algorithm. As the convolutional neural network and reinforcement learning algorithm are continuously trained by the learning unit (1523), the accuracy of the screening quality judgment and the convergence speed of the screening condition optimization are gradually improved over time.

[0200] The predictive maintenance member (1524) analyzes the rotational speed change history and sorting quality history of each of the first magnet rotor module (1413b), the second magnet rotor module (1423b), and the third magnet rotor module (1433b) to predict the degree of demagnetization of the permanent magnets arranged in the first magnet rotor module (1413b), the second magnet rotor module (1423b), and the third magnet rotor module (1433b) and calculates the maintenance time. As specific indicators for predicting demagnetization, the predictive maintenance member (1524) monitors the trend of the average injection distance of non-ferrous metals gradually decreasing under the same rotor rotational speed conditions, the trend of the mis-separation rate gradually increasing, and the trend of the un-separation rate gradually increasing. If the change in these indicators proceeds gradually over a long period regardless of fluctuations in belt conveying speed and input amount, the predictive maintenance member (1524) determines that this is due to demagnetization of the permanent magnet. The predictive maintenance member (1524) analyzes the correlation between the history of rotational speed change and the history of sorting quality using a time series analysis algorithm, and calculates the time when the degree of demagnetization is predicted to exceed a predetermined threshold as the maintenance time.

[0201] The integrated control unit (1530) independently controls the transfer speed of each of the first transfer member (1412), the second transfer member (1422), and the third transfer member (1432), and the rotation speed and rotation direction of each of the first magnet rotor module (1413b), the second magnet rotor module (1423b), and the third magnet rotor module (1433b), based on the analysis results of the AI ​​analysis unit (1520).

[0202] The integrated control unit (1530) includes a first belt inverter member (1531), a second belt inverter member (1532), a third belt inverter member (1533), a first rotor inverter member (1534), a second rotor inverter member (1535), a third rotor inverter member (1536), a controller member (1537), a sensor input member (1538), and an interface member (1539).

[0203] The first belt inverter member (1531) is positioned corresponding to the first transfer member (1412) and individually controls the transfer speed of the first transfer member (1412). The second belt inverter member (1532) is positioned corresponding to the second transfer member (1422) and individually controls the transfer speed of the second transfer member (1422). The third belt inverter member (1533) is positioned corresponding to the third transfer member (1432) and individually controls the transfer speed of the third transfer member (1432).

[0204] The first rotor inverter member (1534) is positioned corresponding to the first eddy current generating member (1413) and individually controls the rotational speed and rotational direction of the first magnet rotor module (1413b). The second rotor inverter member (1535) is positioned corresponding to the second eddy current generating member (1423) and individually controls the rotational speed and rotational direction of the second magnet rotor module (1423b). The third rotor inverter member (1536) is positioned corresponding to the third eddy current generating member (1433) and individually controls the rotational speed and rotational direction of the third magnet rotor module (1433b).

[0205] The controller member (1537) generates and transmits control signals to the first belt inverter member (1531) to the third belt inverter member (1533) and the first rotor inverter member (1534) to the third rotor inverter member (1536), respectively, based on the adjustment amount received from the optimization member (1522) of the AI ​​analysis unit (1520). The controller member (1537) is composed of a PLC (Programmable Logic Controller) or an industrial controller. The controller member (1537) performs a comparison operation between the measurement value received from the sensor input member (1538) and the adjustment amount received from the AI ​​analysis unit (1520), and performs real-time feedback control of the first belt inverter member (1531) to the third belt inverter member (1533) and the first rotor inverter member (1534) to the third rotor inverter member (1536).

[0206] The sensor input member (1538) receives measurement values ​​from a plurality of speed sensors that detect the transfer speed of each of the first transfer member (1412), the second transfer member (1422), and the third transfer member (1432), and the rotation speed of each of the first magnet rotor module (1413b), the second magnet rotor module (1423b), and the third magnet rotor module (1433b).

[0207] The interface member (1539) displays the transfer speed, rotor rotation speed, rotation direction, and sorting quality status of each of the first eddy current sorting unit (1410), the second eddy current sorting unit (1420), and the third eddy current sorting unit (1430), and receives input of setting values ​​from the operator. The interface member (1539) may be configured as a touchscreen type HMI (Human-Machine Interface) panel. The interface member (1539) is equipped with a switching function between an automatic control mode by the AI ​​analysis unit (1520) and a manual control mode by the operator. The interface member (1539) displays maintenance timing information calculated by the predictive maintenance member (1524), so that the operator can recognize the time for replacing or remagnetizing the permanent magnet in advance.

[0208] The integrated control unit (1530) repeatedly performs receiving images from the first vision inspection unit (1415), the second vision inspection unit (1425), and the third vision inspection unit (1435), processing by the image processing unit (1510), analysis by the AI ​​analysis unit (1520), and control by the controller unit (1537) at a cycle of 1 to 10 seconds. As this feedback control cycle is repeated at a cycle of 1 to 10 seconds, the sorting quality is continuously maintained in an optimal state by responding in real time to changes in the characteristics of the sorted material, fluctuations in the input amount, and changes in sorting conditions caused by the demagnetization of the permanent magnet.

[0210] Although embodiments of the present invention have been described in more detail with reference to the attached drawings, the present invention is not necessarily limited to these embodiments and may be modified in various ways within the scope of the technical spirit of the present invention. Accordingly, the embodiments disclosed in the present invention are intended to explain, not limit, the technical spirit of the present invention, and the scope of the technical spirit of the present invention is not limited by these embodiments. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. The scope of protection of the present invention shall be interpreted by the claims below, and all technical spirits within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention.

[0211] Therefore, other implementations, other embodiments, and equivalents to the claims also fall within the scope of the claims set forth below. Explanation of the symbols

[0212] 1000: Non-ferrous metal eddy current separator capable of classifying fine metals 1100: Frame unit 1200: Magnetic Separation Unit 1300: Particle Size Classification Unit 1400: Eddy current separation unit 1500: Control Unit

Claims

Claim 1 A non-ferrous metal eddy current separator capable of classifying fine metals for separating non-ferrous metals from mixed waste comprises: a frame unit; a magnetic separation unit installed on the frame unit and separating magnetic materials contained in the mixed waste by magnetic force; a particle size classification unit connected to the magnetic separation unit and classifying the materials to be separated from the magnetic materials into a plurality of particle size sections according to particle size; and an eddy current separation unit including a plurality of eddy current separation sections connected to the particle size classification unit, arranged in parallel corresponding to each of the plurality of particle size sections, and receiving the materials to be separated in each particle size section and separating non-ferrous metals by eddy current. and a control unit that inspects the condition of non-ferrous metals selected from the plurality of eddy current separators and adjusts the sorting conditions of the plurality of eddy current separators based on the inspection results; wherein the plurality of eddy current separators each have different pole numbers and magnetic field strengths according to the size of the material to be sorted in the corresponding particle size range, and the plurality of particle size ranges include a first particle size range of 20 mm to 40 mm, a second particle size range of 10 mm to 20 mm, and a third particle size range of 3 mm to 10 mm, and the eddy current separator unit includes a first eddy current separator corresponding to the first particle size range, a second eddy current separator corresponding to the second particle size range, and a third eddy current separator corresponding to the third particle size range, and the first eddy current separator is connected to an outlet corresponding to the first particle size range of the particle size classification unit and sorts the material to be sorted in the first particle size range A first input member receiving input; a first transfer member disposed below the first input member and transferring the object to be selected supplied from the first input member; a first eddy current generating member disposed at the discharge end of the first transfer member and having a first magnet rotor module in which a plurality of permanent magnets are arranged in alternating polarity, and generating eddy current in the object to be selected by the rotation of the first magnet rotor module;A first separation and collection member disposed below the first eddy current generating member and separating and collecting non-ferrous metals ejected by eddy current repulsion and non-conductive materials falling naturally; and a first vision inspection member disposed in the first separation and collection member and photographing the non-ferrous metal and the non-conductive material collected by the first separation and collection member; wherein the second eddy current sorting unit comprises: a second input member connected to an outlet corresponding to the second particle size section of the particle size classification unit to receive the material to be sorted in the second particle size section; a second transfer member disposed below the second input member and transferring the material to be sorted supplied from the second input member; a second eddy current generating member disposed at the discharge end of the second transfer member and equipped with a second magnet rotor module in which a plurality of permanent magnets are arranged in alternating polarity, and generating eddy currents on the material to be sorted by the rotation of the second magnet rotor module; and a second eddy current generating member disposed below the second eddy current generating member and separating and collecting the non-ferrous metal ejected by eddy current repulsion and the non-conductive material falling naturally. Absence of separate collection; and a second vision inspection member disposed in the second separation and collection member and photographing the non-ferrous metal and the non-conductive material collected by the second separation and collection member; wherein the third eddy current sorting unit comprises: a third input member connected to an outlet corresponding to the third particle size section of the particle size classification unit to receive the material to be sorted in the third particle size section; a third transfer member disposed below the third input member and transferring the material to be sorted supplied from the third input member; a third eddy current generating member disposed at the discharge end of the third transfer member and equipped with a third magnet rotor module having a plurality of permanent magnets arranged in alternating polarity, and generating eddy currents on the material to be sorted by the rotation of the third magnet rotor module; and a third unit disposed below the third eddy current generating member and separating and collecting the non-ferrous metal ejected by eddy current repulsion and the non-conductive material falling naturally. Absence of separate collection;and a third vision inspection member disposed in the third separation and collection member and photographing the non-ferrous metal and the non-conductive body collected by the third separation and collection member; wherein the first magnetic rotor module has a first number of poles and forms a first magnetic field strength, the second magnetic rotor module has a second number of poles greater than the first number of poles and forms a second magnetic field strength greater than the first magnetic field strength, and the third magnetic rotor module has a third number of poles greater than the second number of poles and forms a third magnetic field strength greater than the second magnetic field strength, and the control unit includes an image processing unit that receives and processes images captured from the first vision inspection member, the second vision inspection member, and the third vision inspection member; an AI analysis unit that analyzes data transmitted from the image processing unit using an artificial intelligence algorithm to determine the quality of non-ferrous metal sorting in the first eddy current sorting unit, the second eddy current sorting unit, and the third eddy current sorting unit; and An integrated control unit that independently controls the transfer speed of each of the first transfer member, the second transfer member, and the third transfer member, and the rotation speed and rotation direction of each of the first magnetic rotor module, the second magnetic rotor module, and the third magnetic rotor module, based on the analysis results of the AI ​​analysis unit; wherein the image processing unit comprises: a preprocessing unit that removes noise and enhances contrast of images received from the first camera module of the first vision inspection member, the second camera module of the second vision inspection member, and the third camera module of the third vision inspection member, respectively; a contour detection unit that detects the contour of the non-ferrous metal from the image processed by the preprocessing unit; and a size measuring unit that measures the size and shape of the non-ferrous metal from the contour detected by the contour detection unit. and an incorporation analysis member that tracks the drop position of the non-ferrous metal in each of the first separation collection member, the second separation collection member, and the third separation collection member, and calculates the incorporation ratio of the non-ferrous metal and the non-conductor;The AI ​​analysis unit comprises: a quality classification member that classifies the sorting quality of the non-ferrous metal collected in each of the first non-ferrous metal collection hopper module of the first separation and collection member, the second non-ferrous metal collection hopper module of the second separation and collection member, and the third non-ferrous metal collection hopper module of the third separation and collection member into appropriate, unseparated, and misseparated using a deep learning-based convolutional neural network (CNN); and, based on the classification result of the quality classification member, calculates at least one adjustment amount among the rotational speed of each of the first magnet rotor module, the second magnet rotor module, and the third magnet rotor module, the transfer speed of each of the first transfer member, the second transfer member, and the third transfer member, and the position of each of the first splitter module of the first separation and collection member, the second splitter module of the second separation and collection member, and the third splitter module of the third separation and collection member using a reinforcement learning algorithm. The apparatus comprises: an optimization member; a learning member that accumulates learning data and continuously trains the convolutional neural network and the reinforcement learning algorithm; and a predictive maintenance member that analyzes the history of rotational speed changes and sorting quality of each of the first magnet rotor module, the second magnet rotor module, and the third magnet rotor module to predict the degree of demagnetization of permanent magnets arranged in the first magnet rotor module, the second magnet rotor module, and the third magnet rotor module, and calculates the maintenance time; wherein the first input member comprises: a first input hopper module formed in a funnel shape that is wide at the top and narrows toward the bottom, connected to an outlet corresponding to the first particle size section of the particle size classification unit, and having a space inside to accommodate the sorted material; and a first input amount control gate module installed at the bottom opening of the first input hopper module to vary the opening area to control the input amount of the sorted material. and a first vibration feeder module disposed below the first input amount control gate module and vibrating by an eccentric weight vibration motor to uniformly disperse the sorted material in the width direction of the first conveying member and supply it in a single layer;The first conveying member comprises: a first belt module formed of a non-conductive PVC material, having a thickness of 3 mm to 5 mm and a width of 600 mm to 1000 mm; a first tail drum module disposed at the input end of the first belt module, formed of non-magnetic stainless steel, having a diameter of 150 mm to 200 mm, having rubber lagging formed on its outer surface to secure friction with the first belt module, and having both ends rotatably supported by pillow block bearings; a first support roller module comprising a plurality of upper carrier rollers arranged at intervals of 300 mm to 500 mm to support the upper conveying surface of the first belt module, and a plurality of lower return rollers supporting the lower return surface of the first belt module; a three-phase induction motor, a helical reducer connected to the three-phase induction motor, and a component coupled to the output shaft of the helical reducer to transmit power to the shaft of the first tail drum module. A first belt drive module comprising a drive pulley and driving the first belt module at a feed speed of 1.0 m / s to 1.5 m / s; wherein the first eddy current generating member is cylindrical formed of non-magnetic stainless steel, has a diameter of 300 mm to 400 mm, has a polytetrafluoroethylene (PTFE) lubricating coating formed on its outer surface, is fixedly disposed on a frame without rotating, and supports the first belt module to rotate while wrapping around its outer surface; and a first magnet rotor module concentrically disposed inside the first head drum module, wherein 12 permanent magnets of grade NdFeB N35 to N42 are arranged on the outer surface of a rotor core formed of non-magnetic alloy steel so that the N poles and S poles alternate, and forms the first magnetic field strength of 3,000 to 5,000 gauss on the surface of the first belt module.and a first rotor drive module comprising a three-phase induction motor connected to the shaft of the first magnet rotor module and an inverter that variably controls the rotational speed of the three-phase induction motor to 1,500 rpm to 2,000 rpm, and which drives the rotational direction of the first magnet rotor module to selectably be the same direction as or opposite to the movement direction of the first belt module; wherein the first separation and collection member comprises: a first splitter module disposed in front of the discharge side of the first head drum module, whose position is adjustable within a horizontal distance of 200 mm to 400 mm from the center of the first head drum module, and whose position is finely adjustable in the horizontal and vertical directions by means of an elongated slot; a first magnetic material collection hopper module disposed directly below the first head drum module to collect residual magnetic material; and a member disposed on the side closer to the first head drum module relative to the first splitter module and naturally falling from the end of the first belt module It includes: a first non-magnetic material collection hopper module for collecting the entire non-conductive material; and a first non-ferrous metal collection hopper module disposed on the side far from the first head drum module relative to the first splitter module for collecting non-ferrous metals ejected by eddy current repulsion; wherein the second input member is formed in a funnel shape that is wide at the top and narrows toward the bottom, and is connected to an outlet corresponding to the second particle size section of the particle size classification unit; and a second input amount control gate module installed at the lower opening of the second input hopper module. and a second vibrating feeder module disposed below the second input amount control gate module and driven by an eccentric weight vibrating motor having an amplitude of 1.5 mm to 3.0 mm to disperse and supply the sorted material of the second particle size section in a single layer in the width direction of the second conveying member; wherein the second conveying member comprises a second belt module formed of a non-conductive polyurethane (PU) material, having a thickness of 2 mm to 3 mm, and formed thinner than the first belt module;A second tail drum module disposed at the input end of the second belt module, formed of non-magnetic stainless steel, having a diameter of 120 mm to 160 mm, and having ceramic lagging formed on its outer surface; a second support roller module supporting the upper conveying surface and the lower return surface of the second belt module; and a second belt drive module that drives the conveying speed of the second belt module at 0.5 m / s to 0.8 m / s, but is set slower than the conveying speed of the first belt module by the first belt drive module to increase the residence time of the sorted object in the magnetic field region of the second eddy current generating member; wherein the second eddy current generating member is cylindrical formed of non-magnetic stainless steel, has a diameter of 280 mm to 350 mm, has a slit formed with a predetermined width in the longitudinal direction, has a PTFE lubricating coating formed on the outer surface of the non-slit region, and is fixedly disposed on a frame without rotating. A head drum module; a second magnet rotor module eccentrically disposed inside the second head drum module such that the rotor center is deviated from the center of the second head drum module and is configured to directly contact the inner surface of the second belt module through a slit of the second head drum module, wherein 22 permanent magnets of grade NdFeB N42 to N48 are arranged such that the N and S poles alternate, and the second magnet rotor module forms the second magnetic field strength of 5,000 to 8,000 gauss on the surface of the second belt module; and a second rotor drive module connected to the shaft of the second magnet rotor module, variablely controlling the rotational speed of the second magnet rotor module to 2,500 rpm to 3,000 rpm, and driving the rotational direction of the second magnet rotor module in a direction opposite to the movement direction of the second belt module to maximize the relative speed between the second belt module and the second magnet rotor module;The second head drum module includes a slit that causes the second magnet rotor module to directly contact the inner surface of the second belt module, thereby shortening the distance between the second magnet rotor module and the object to be sorted by the thickness of the second head drum module relative to the first head drum module of the first eddy current sorting unit, and improving the magnetic field reach efficiency; the second separation and collection member comprises: a second splitter module positioned in front of the discharge side of the second head drum module and adjustable in position within a horizontal distance range of 150 mm to 300 mm from the center of the second head drum module; a second magnetic material collection hopper module positioned directly below the second head drum module; and a second non-magnetic material collection hopper module positioned on the side closer to the second head drum module relative to the second splitter module. and a second non-ferrous metal collection hopper module positioned on the side farther from the second head drum module based on the second splitter module; wherein the third input member is formed in a funnel shape that is wide at the top and narrows toward the bottom, and is connected to an outlet corresponding to the third particle size section of the particle size classification unit; and a third input amount control gate module installed at the lower opening of the third input hopper module, wherein the opening amount is precisely limited to prevent excessive input of fine particles of 3mm to 10mm. and a third vibration feeder module disposed below the third input amount control gate module and configured as a high-frequency micro-vibration type with an amplitude of 0.5 mm to 1.5 mm to disperse fine particles of the third particle size range into a uniform single layer in the width direction of the third conveying member; wherein the third conveying member comprises: a third belt module formed of a non-conductive polyurethane (PU) material, having a fabric reinforcement layer inserted inside, having a thickness of 1.5 mm to 2.4 mm, and formed as an ultra-thin type thinner than the first belt module and the second belt module; and a third tail drum module disposed at the input end of the third belt module, formed of non-magnetic stainless steel, having a diameter of 100 mm to 140 mm, and having ceramic lagging formed on its outer surface.A third support roller module arranged at intervals of 200 mm to 300 mm to minimize sagging of the third belt module; a third belt drive module that drives the conveying speed of the third belt module at 0.8 m / s to 1.2 m / s, and is set faster than the conveying speed of the second belt module by the second belt drive module, thereby reducing the stacking thickness of the sorted material on the third belt module relative to the same input amount, so that the sorted material is conveyed in a single layer; wherein the third eddy current generating member is cylindrical formed of non-magnetic stainless steel, has a diameter of 250 mm to 320 mm, has a slit formed with a predetermined width in the longitudinal direction, is configured so that the third magnetic rotor module directly contacts the inner surface of the third belt module through the slit, has a PTFE lubricating coating formed on the outer circumference of the non-slit area, and is fixedly disposed on a frame without rotating; and the third A third magnetic rotor module eccentrically disposed inside the head drum module, wherein permanent magnets of grade NdFeB N48 to N52 are arranged in 32 to 38 poles such that the N and S poles alternate, and wherein the third magnetic field strength of 8,000 to 12,000 gauss is formed on the surface of the third belt module, and the pole spacing is formed to be 13 mm to 22 mm, corresponding to the size of the material to be sorted in the third particle size section; and a third rotor drive module connected to the shaft of the third magnet rotor module, variablely controlling the rotational speed of the third magnet rotor module to 3,500 rpm to 4,500 rpm, and driving the rotational direction of the third magnet rotor module in a direction opposite to the movement direction of the third belt module; wherein the third separation and collection member comprises: a third splitter module disposed in front of the discharge side of the third head drum module and whose position is adjustable within a horizontal distance of 100 mm to 250 mm from the center of the third head drum module; and a third magnetic material collection hopper module disposed directly below the third head drum module.A third non-magnetic material collection hopper module positioned on the side closer to the third head drum module relative to the third splitter module; and a third non-ferrous metal collection hopper module disposed on the side farther from the third head drum module with respect to the third splitter module; wherein the first vision inspection member comprises a first camera module disposed above the first non-ferrous metal collection hopper module to photograph the trajectory and distribution of non-ferrous metal falling into the first non-ferrous metal collection hopper module, and a first lighting module disposed corresponding to the first camera module to illuminate a shooting area; the second vision inspection member comprises a second camera module disposed above the second non-ferrous metal collection hopper module to photograph the trajectory and distribution of non-ferrous metal falling into the second non-ferrous metal collection hopper module, and a second lighting module disposed corresponding to the second camera module to illuminate a shooting area; and the third vision inspection member comprises a third It includes a third camera module for capturing the trajectory and distribution of non-ferrous metal falling into a non-ferrous metal collection hopper module, and a third lighting module positioned corresponding to the third camera module to illuminate the shooting area; the third belt module is formed thinner than the first belt module and the second belt module so that the distance between the third magnetic rotor module and the object to be sorted is minimized, and the number of poles of the third magnetic rotor module is configured to be greater than the number of poles of the first magnetic rotor module and the second magnetic rotor module so that the pole spacing narrows in correspondence with the size of the object to be sorted in the third particle size section, and accordingly, an eddy current effective even for fine objects to be sorted in the third particle size section is induced, and the integrated control unit is positioned corresponding to the first conveying member, the second conveying member, and the third conveying member, respectively, to individually control the conveying speed of each of the first conveying member, the second conveying member, and the third conveying member. First belt inverter member, second belt inverter member and third belt inverter member;A first rotor inverter member, a second rotor inverter member, and a third rotor inverter member respectively disposed corresponding to the first eddy current generating member, the second eddy current generating member, and the third eddy current generating member to individually control the rotational speed and rotational direction of each of the first magnet rotor module of the first eddy current generating member, the second magnet rotor module of the second eddy current generating member, and the third magnet rotor module of the third eddy current generating member; a controller member that generates and transmits control signals to each of the first belt inverter member to the third belt inverter member and the first rotor inverter member to the third rotor inverter member based on a control amount received from the optimization member of the AI ​​analysis unit; and the transfer speed of each of the first transfer member, the second transfer member, and the third transfer member, and the first magnet rotor module, the second magnet rotor module, and the third A sensor input member that receives measurement values ​​from a plurality of speed sensors that detect the rotational speed of each magnet rotor module; An interface member that displays the transfer speed, rotor rotation speed, rotation direction, and sorting quality status of each of the first eddy current sorting unit, the second eddy current sorting unit, and the third eddy current sorting unit, and receives input of a set value from an operator; wherein the controller member compares and calculates a measurement value received from the sensor input member and a control amount received from the AI ​​analysis unit to provide real-time feedback control of the first to third belt inverter members and the first to third rotor inverter members; and the integrated control unit repeatedly performs image reception from the first vision inspection member, the second vision inspection member, and the third vision inspection member, processing by the image processing unit, analysis by the AI ​​analysis unit, and control by the controller member at a cycle of 1 to 10 seconds, thereby classifying fine metals; Claim 2 delete Claim 3 delete

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