A depth sorting device

Abstract

The application provides a deep sorting device, which comprises a primary sorting unit and a secondary sorting unit, the secondary sorting unit is arranged on the axial side of the primary sorting unit, the primary sorting unit comprises a primary feeding hopper and a magnetic sorting body, the magnetic sorting body is arranged in the interior of the primary feeding hopper, the magnetic sorting body is coaxially arranged with the primary feeding hopper, the magnetic sorting body is used for primary sorting of materials in the primary feeding hopper to discharge primary magnetic sorting waste, the secondary sorting unit comprises a secondary feeding hopper and a magnetic roller, the secondary feeding hopper is communicated with the primary feeding hopper, the primary magnetic sorting waste enters the secondary feeding hopper from the primary feeding hopper, the magnetic roller is arranged in the interior of the secondary feeding hopper, the magnetic field intensity of the magnetic roller is greater than that of the magnetic sorting body, and the magnetic roller is used for secondary sorting of the primary magnetic sorting waste. Through arrangement of the magnetic roller, the materials can be sorted twice, so that the materials with low iron content can be recycled, the purpose of deep sorting is achieved through twice sorting, and the recovery rate of the magnetite is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of iron ore magnetic separation equipment, and particularly relates to a deep sorting device. BACKGROUND

[0002] Before entering the grinding, the magnetite generally needs to be crushed in three or four stages, and each crushing stage is a dissociation of the magnetite, and part of the single gangue not containing the magnetite is regenerated, which should be sorted and tailing. Since most iron ore species have a certain degree of magnetism, magnetic separation is the most important beneficiation method for iron ore, and a magnetic separator is usually used to sort and recover the crushed iron ore. Since the existing magnetic separator can only sort the iron ore once, the iron ore with weak magnetism is easily discarded as waste, and the recovery rate of the magnetite is low. SUMMARY

[0003] Therefore, the technical problem to be solved by the application is to provide a deep sorting device which can sort the magnetite twice so that the ore with weak magnetism and the ore-gangue intergrowth can be recovered, and the recovery rate of the magnetite is improved.

[0004] In order to solve the above problems, the application provides a deep sorting device, which comprises a primary sorting unit and a secondary sorting unit, the secondary sorting unit is arranged on the axial side of the primary sorting unit, the primary sorting unit comprises a primary feeding hopper and a magnetic sorting body, the magnetic sorting body is arranged in the interior of the primary feeding hopper, the magnetic sorting body is coaxially arranged with the primary feeding hopper, the magnetic sorting body is used for primary sorting of the material in the primary feeding hopper to discharge primary magnetic separation waste, the secondary sorting unit comprises a secondary feeding hopper and a magnetic roller, the secondary feeding hopper is in communication with the primary feeding hopper, the primary magnetic separation waste enters the secondary feeding hopper from the primary feeding hopper, the magnetic roller is arranged in the interior of the secondary feeding hopper, the magnetic field strength of the magnetic roller is greater than that of the magnetic sorting body, and the magnetic roller is used for re-sorting the primary magnetic separation waste.

[0005] Optionally, the primary feeding hopper and the magnetic sorting body are annular, the cross-sectional area of the primary feeding hopper and the magnetic sorting body close to one end of the secondary feeding hopper is greater than that away from the other end of the secondary feeding hopper, and the generatrix angle of the primary feeding hopper and the magnetic sorting body is A, 70°≤A≤80°.

[0006] Optionally, the magnetic selection body comprises an electromagnetic plate, an electric ring and a contact switch, the electromagnetic plate is electrically connected with the electric ring through the contact switch, a plurality of electromagnetic plates are arranged uniformly along the circumference of the first feeding hopper, the cross-sectional circumferential angle of the electromagnetic plate is A, 10°≤A≤20°, the cross-sectional circumferential angle of the electric ring is B, 290°≤B≤310°, and the electric ring is used for controlling the start and stop of the electromagnetic plate.

[0007] Optionally, the first sorting unit further comprises a rotating shaft and a first motor, the first motor is connected with the magnetic selection body through the rotating shaft, and the first motor drives the magnetic selection body to rotate along the circumferential direction of the first feeding hopper through the rotating shaft.

[0008] Optionally, the first sorting unit further comprises a control module, the control module is electrically connected with the electric ring, the control module is used for controlling the current intensity of the electric ring, the control module is electrically connected with the first motor, and the control module is used for controlling the start and stop of the first motor and the rotating speed of the first motor.

[0009] and / or,

[0010] The magnetic field intensity of the magnetic selection body is C, 100mT≤C≤500mT.

[0011] Optionally, the magnetic roller comprises a permanent magnet, the permanent magnet is arranged in the interior of the magnetic roller along the circumferential direction of the magnetic roller and extends in the axial direction of the magnetic roller, the permanent magnet is fan-shaped, the cross-sectional circumferential angle of the permanent magnet is D, 110°≤A≤130°, and the magnetic field intensity of the permanent magnet is D, 1.1C≤D≤1.2C.

[0012] Optionally, the second sorting unit further comprises a second motor, the second motor is connected with the magnetic roller, and the second motor drives the magnetic roller to rotate along the circumferential direction of the magnetic roller, so that the material adsorbed by the permanent magnet falls off from the magnetic roller.

[0013] Optionally, the depth sorting device further comprises a first discharging hopper, the first discharging hopper comprises a first ore discharging cavity and a first waste rock discharging cavity, the first feeding hopper is connected with the first feeding hopper in communication through the first waste rock discharging cavity, and the primary magnetic selection waste is discharged into the second feeding hopper through the first waste rock discharging cavity.

[0014] Optionally, the secondary feeding hopper comprises a secondary ore discharging chamber and a secondary waste rock discharging chamber, the magnetic ore separated by the secondary sorting unit is discharged through the secondary ore discharging chamber, the secondary magnetic separation waste separated by the secondary sorting unit is discharged through the secondary waste rock discharging chamber, the secondary sorting unit further comprises a partition plate, the partition plate is connected to the secondary feeding hopper through a base, the partition plate is arranged on the side of the magnetic roller away from the primary feeding hopper, the partition plate extends along the radial direction of the secondary feeding hopper, the partition plate comprises a first guide surface and a second guide surface, the top end of the first guide surface is connected to the top end of the second guide surface to form a sharp angle, the bottom end of the first guide surface extends towards the secondary ore discharging chamber, and the bottom end of the second guide surface extends towards the secondary waste rock discharging chamber.

[0015] Optionally, the magnetic separation device further comprises a crushing part, the crushing part is arranged on the side of the primary sorting unit away from the secondary sorting unit, the crushing part is in communication with the primary sorting unit, and the crushing part is coaxially arranged with the primary sorting unit.

[0016] Advantages

[0017] The depth sorting device provided in the embodiment of the application can perform twice magnetic separation on the ore through the magnetic separation body and the magnetic roller, the waste generated by the first magnetic separation of the magnetic separation body is subjected to the second magnetic separation through the magnetic roller, the magnetic field strength of the magnetic roller is greater than that of the magnetic separation body, so that the ore with weak magnetism and the ore-gangue intergrowth in the waste of the first magnetic separation are adsorbed on the magnetic roller, the twice sorting achieves the purpose of depth sorting, improves the recovery rate of magnetite, and improves the economic benefit of the ore dressing plant. Meanwhile, the crushing part is in communication with the primary sorting unit, so that the crushing operation and the waste rejection operation of pre-separation are integrated, the equipment integration can be realized, the independent pre-separation belt conveyor and the pre-separation plant house are avoided, the investment cost of the equipment and the plant house is reduced, the operation cost and the maintenance cost of the equipment are reduced due to the simple structure, small size and no need of a plurality of workers to guard the equipment of the depth sorting device. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 FIG. 1 is a structural schematic view of the depth sorting device of the embodiment of the application;

[0019] Fig. 2 FIG. 4 is a structural schematic view of the magnetic separation body of the embodiment of the application.

[0020] The signs are as follows:

[0021] 1, primary feeding hopper; 2, magnetic sorting body; 21, electromagnetic plate; 22, power connection ring; 23, contact switch; 3, secondary feeding hopper; 4, magnetic roller; 41, permanent magnet; 5, rotating shaft; 6, primary motor; 7, secondary motor; 8, primary discharge hopper; 81, primary ore discharge cavity; 82, primary waste rock discharge cavity; 9, partition plate; 10, crushing part; 11, frame; 12, secondary ore discharge cavity; 13, secondary waste rock discharge cavity. DETAILED DESCRIPTION

[0022] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0023] For reference Figs. 1-2 As shown, according to the embodiment of the present application, a deep sorting device is provided, which comprises a primary sorting unit and a secondary sorting unit, the secondary sorting unit is arranged on the axial side of the primary sorting unit, the primary sorting unit comprises a primary feeding hopper 1 and a magnetic sorting body 2, the magnetic sorting body 2 is arranged inside the primary feeding hopper 1, the magnetic sorting body 2 is coaxially arranged with the primary feeding hopper 1, the magnetic sorting body 2 is used for primary sorting of the material in the primary feeding hopper 1 to discharge primary magnetic sorting waste, the secondary sorting unit comprises a secondary feeding hopper 3 and a magnetic roller 4, the secondary feeding hopper 3 is in communication with the primary feeding hopper 1, the primary magnetic sorting waste enters the secondary feeding hopper 3 from the primary feeding hopper 1, the magnetic roller 4 is arranged inside the secondary feeding hopper 3, the magnetic field strength of the magnetic roller 4 is greater than that of the magnetic sorting body 2, and the magnetic roller 4 is used for re-sorting the primary magnetic sorting waste.

[0024] By arranging the magnetic sorting body 2 and the magnetic roller 4, the ore can be sorted twice, the waste produced by the primary sorting of the magnetic sorting body 2 is subjected to secondary sorting by the magnetic roller 4, wherein the magnetic field strength of the magnetic roller 4 is greater than that of the magnetic sorting body 2, so that the ore with weak magnetism and the ore-gangue intergrowth in the primary sorting waste are adsorbed on the magnetic roller 4, and the purpose of deep sorting is achieved by twice sorting, the recovery rate of magnetite is improved, and the economic benefit of the ore dressing plant is improved.

[0025] In the present application, the deep sorting device further comprises a frame 11, the frame 11 comprises a first platform, a second platform and a third platform, in the present application, the deep sorting device is vertically arranged, and the first platform, the second platform and the third platform are horizontally arranged.

[0026] The first-stage feeding hopper 1 is substantially annular, is arranged on the upper portion of the second platform, and is fixedly connected with the second platform. The connection manner can be bolt connection or welding, and the application does not make further limitation.

[0027] Specifically, the first-stage feeding hopper 1 can include an outer ring surface and an inner ring surface. In a cross section perpendicular to the central axis of the first-stage feeding hopper 1, the cross-sectional area of the outer ring surface is greater than that of the inner ring surface. The material flows between the outer ring surface and the inner ring surface. By arranging the outer ring surface and the inner ring surface, a stable flow space is provided for the material.

[0028] The first-stage sorting unit further includes a magnetic sorting body 2 arranged inside the first-stage feeding hopper 1. In the embodiment of the application, the magnetic sorting body 2 can be annular. The outer wall surface of the magnetic sorting body 2 is in close contact with the inner ring surface of the first-stage feeding hopper 1. The height of the magnetic sorting body 2 can be the same as that of the first-stage feeding hopper 1. The magnetic sorting body 2 is coaxially arranged with the first-stage feeding hopper 1.

[0029] The first-stage sorting unit further includes a wear-resistant pad made of rubber or the like. The thickness of the wear-resistant pad can be 20-30 mm. In the embodiment of the application, the thickness of the wear-resistant pad is 25 mm. The wear-resistant pad is annular and is sleeved on the outer peripheral wall of the magnetic sorting body 2. By arranging the wear-resistant pad, the service life of the magnetic sorting body 2 can be improved.

[0030] Specifically, the first-stage sorting unit further includes a rotating shaft 5 and a motor. The rotating shaft 5 is arranged on the third platform through a bearing seat. The rotating shaft 5 is coaxially arranged with the first-stage feeding hopper 1. One end of the rotating shaft 5 is connected with the magnetic sorting body 2, and the other end is connected with the motor. The motor can be a variable frequency motor. The motor drives the rotating shaft 5 to rotate, thereby driving the magnetic sorting body 2 to rotate around the rotating shaft 5 in the circumferential direction of the feeding hopper.

[0031] The second-stage sorting unit further includes a second-stage feeding hopper 3. The second-stage feeding hopper 3 is substantially rectangular, is arranged on the upper portion of the third platform, and is fixedly connected with the third platform. The connection manner can be bolt connection or flange, and the application does not make further limitation.

[0032] The second-stage sorting unit further includes a magnetic roller 4. The magnetic roller 4 can be cylindrical. In the embodiment of the application, the magnetic roller 4 is horizontally arranged. The magnetic roller 4 is arranged inside the second-stage feeding hopper 3 away from the side where the material flows. The magnetic roller 4 is used to adsorb the weakly magnetic ore and ore-gangue intergrowth in the waste rock discharged from the first-stage feeding hopper 1, and performs sorting and waste throwing operation on the waste rock and the weakly magnetic ore and ore-gangue intergrowth, thereby improving the recovery rate of magnetite.

[0033] Specifically, the secondary sorting unit further comprises a flexible pad, which can be made of rubber or the like, and which can be arranged on the outer peripheral wall of the magnetic roller 4. The thickness of the flexible pad can be 30-80 mm. In the embodiment of the present application, the thickness of the flexible pad is 55 mm. By arranging the flexible pad, the magnetic roller 4 can be prevented from being directly impacted by the material flow, the maintenance frequency of the magnetic roller 4 is reduced, the service life of the magnetic roller 4 is improved, and thus the service life of the deep sorting device is improved.

[0034] The primary feeding hopper 1 and the magnetic sorting body 2 are annular. The cross-sectional area of the primary feeding hopper 1 and the magnetic sorting body 2 close to one end of the secondary feeding hopper 3 is greater than the cross-sectional area thereof away from the other end of the secondary feeding hopper 3. The generatrix angle of the primary feeding hopper 1 and the magnetic sorting body 2 is A, and 70°≤A≤80°.

[0035] By arranging the primary feeding hopper 1 and the magnetic sorting body 2 to be annular, the vertical two-layer thin advantage of the annular circumferential discharge port of the cone crusher or the gyratory crusher can be fully utilized, so that the material layer is close to the outer peripheral wall of the annular magnetic sorting body 2, and the situation that the material layer is too far away from the outer peripheral wall of the magnetic sorting body 2 and the field strength is too low to enable the ore to be adsorbed can be avoided, thereby ensuring efficient recovery of the magnetic sorting iron.

[0036] The magnetic sorting body 2 is arranged inside the primary feeding hopper 1 and extends along the inner peripheral side of the primary feeding hopper. In the embodiment of the present application, the magnetic sorting body 2 is coaxially arranged with the primary feeding hopper 1. The cross-sectional area of the magnetic sorting body 2 and the primary feeding hopper 1 in the first direction gradually increases.

[0037] The first direction can be the direction of the gravity received by the primary feeding hopper 1 and the magnetic sorting body 2, i.e., the first direction is a vertical downward direction.

[0038] Specifically, the generatrix angle of the primary feeding hopper 1 and the magnetic sorting body 2 is A, and 70°≤A≤80°. In the embodiment of the present application, the generatrix angle of the primary feeding hopper 1 and the magnetic sorting body 2 is preferably 75°. By arranging the primary feeding hopper and the magnetic sorting body 2 to be annular with a small upper opening and a large lower opening and a generatrix angle of 75°, it can be ensured that the material has sufficient sorting area. At the same time, the material can have sufficient longitudinal rolling and downward movement sorting distance on the annular surface of the feeding hopper, the sorting effect is improved, waste rock is prevented from being mixed into the magnetic ore, and the recovery rate of the magnetic ore is improved.

[0039] The magnetic sorting body 2 comprises an electromagnetic plate 21, an electrical connection ring 22, and a contact switch 23. The electromagnetic plate 21 is electrically connected to the electrical connection ring 22 through the contact switch 23. The electromagnetic plate 21 is arranged in multiple, and the multiple electromagnetic plates 21 are uniformly arranged along the circumference of the primary feeding hopper 1. The cross-sectional circumferential angle of the electromagnetic plate 21 is B, and 10°≤B≤20°. The cross-sectional circumferential angle of the electrical connection ring 22 is C, and 290°≤C≤310°. The electrical connection ring 22 is used to control the start and stop of the electromagnetic plate 21.

[0040] The electromagnetic plate 21 is substantially isosceles trapezoidal, and a plurality of electromagnetic plates 21 can be arranged. The plurality of electromagnetic plates 21 are uniformly arranged along the circumference of the primary feeding hopper 1. The electromagnetic plate 21 can generate a magnetic force after being powered on, so that the magnetic material is adsorbed on the inner ring surface of the primary feeding hopper 1.

[0041] Specifically, the cross-sectional circumferential angle of the electromagnetic plate 21 is B, and 10°≤B≤20°. In the embodiment of the present application, the cross-sectional circumferential angle of the electromagnetic plate 21 perpendicular to the central axis of the primary feeding hopper 1 is preferably 20°, and the electromagnetic plate 21 is provided with 18 electromagnetic plates.

[0042] The electromagnet is provided below with a contact switch 23, which can be a spring structure. The electromagnet is electrically connected to the power ring 22 through the contact switch 23.

[0043] Specifically, the thickness of the power ring 22 can be 10-30mm. The power ring 22 is provided with a power slot in the middle, and the width of the power slot is 5-10mm. The cross-sectional circumferential angle of the power ring 22 perpendicular to the central axis of the primary feeding hopper 1 is C, and 290°≤C≤310°. In the embodiment of the present application, the cross-sectional circumferential angle of the power ring 22 is preferably 300°.

[0044] In the embodiment of the present application, the ring surface area of the primary feeding hopper 1 corresponding to the cross-sectional circumferential angle 300° of the power ring 22 is the magnetic material adsorption area, and the remaining ring surface 60° of the primary feeding hopper 1 is the unloading area. The adsorbed magnetic material is discharged through the unloading area.

[0045] In the present application, by setting the angle of the ring surface occupied by each electromagnetic plate 21 to 20°, after the electromagnetic plate 21 completes the adsorption and separation of the magnetic ore through the power connection and magnetism in the primary separation unit, it enters the unloading area with the rotation of the magnetic selection body 2. Since the unloading area is not provided with the power ring 22, the electromagnetic plate 21 entering the unloading area is demagnetized one by one, so that the magnetic ore adsorbed on the inner ring surface of the primary feeding hopper 1 completes unloading, and the continuous separation and unloading operation of each electromagnetic plate 21 is realized, improving the working efficiency of the device. At the same time, the cross-sectional circumferential angle of the magnetic selection body 2 perpendicular to the central axis of the primary feeding hopper 1 is 300°, which corresponds to the magnetic selection area, improving the separation effect. The remaining 60° corresponding to the non-magnetic selection area will give the raw materials and dry selected ores as ore products, avoiding the loss of magnetic minerals in the raw materials in the non-magnetic selection area, thereby ensuring the recovery rate of the magnetic iron in the magnetite, and laying a foundation for the high yield of the ore dressing plant.

[0046] The primary separation unit further comprises a rotating shaft 5 and a primary motor 6. The primary motor 6 is connected to the magnetic selection body 2 through the rotating shaft 5. The primary motor 6 drives the magnetic selection body 2 to rotate along the circumferential direction of the primary feeding hopper through the rotating shaft 5.

[0047] The rotation shaft 5 and the first motor 6 are arranged to enable the magnetic selection body 2 to rotate around the circumferential direction of the first hopper 1 with the rotation shaft 5 as the rotation center, so that the vertical two-layer thin advantage of the annular circumferential discharge port of the cone crusher or rotary crusher can be fully utilized, the material layer is close to the outer circumferential wall of the annular magnetic selection body 2, and the situation that the material layer is too far away from the outer circumferential wall of the magnetic selection body 2 and the field strength is too low to cause the magnetic attraction of some ores is avoided, and the efficient recovery of the magnetic iron is ensured.

[0048] The rotation shaft 5 can be a cylinder, the rotation shaft 5 is vertically arranged, one end of the rotation shaft 5 close to the second hopper 3 is rotationally connected with the first motor 6, and the other end is fixedly connected with the magnetic selection body 2.

[0049] Specifically, the first motor 6 can be a variable frequency motor, the rotation speed of the motor is adjusted to control the rotation speed of the magnetic selection body 2, so that the magnetic selection body 2 adopts different rotation speeds corresponding to different iron grades of the material, the magnetic ore in the magnetic selection area is avoided to be thrown out, and the recovery rate of the magnetite is improved.

[0050] The first sorting unit further comprises a control module electrically connected with the power connection ring 22, the control module is used to control the current intensity of the power connection ring 22, the control module is electrically connected with the first motor 6, and the control module is used to control the start-stop and rotation speed of the first motor 6.

[0051] And / or,

[0052] The magnetic field strength of the magnetic selection body 2 is D, and 100mT≤D≤500mT.

[0053] The start-stop and frequency conversion signal of the first motor 6 are controlled by the module, and the adsorption capacity of the magnetic selection body 2 is controlled by the current intensity signal of the electromagnetic plate 21, so that manual operation of the operator is avoided, and the automation degree of the device is improved.

[0054] The magnetic field strength of the magnetic selection body 2 is D, and 100mT≤D≤500mT. In the embodiment of the application, the magnetic field strength of the magnetic selection body 2 is preferably 300mT.

[0055] Specifically, the electromagnetic plate 21 controls the size of the input current through the control module, the field strength of the magnetic selection body 2 can be adjusted between 100-500mT, the control and adjustment of the magnetic attraction of the magnetic ore can be realized, the rotation frequency conversion speed of the first motor 6 of the magnetic selection body 2 is controlled through the control module, the adjustment of the sorting time of the material in the first sorting unit can be realized, the sorting magnetic force and the sorting time of the magnetic selection body 2 are adjusted and controlled through the control module, and the recovery rate of the magnetite is improved.

[0056] The magnetic roller 4 comprises permanent magnets 41 arranged in the circumferential direction of the magnetic roller 4 inside the magnetic roller 4 and extending in the axial direction of the magnetic roller 4, the permanent magnets 41 are fan-shaped, the cross-sectional circumferential angle of the permanent magnets 41 is E, 110°≤E≤130°, the magnetic field strength of the permanent magnets 41 is F, 1.1C≤F≤1.2C, and the permanent magnets 41 are used for adsorbing small magnetic materials.

[0057] The permanent magnets 41 can be curved panel-shaped, arranged in the circumferential direction of the magnetic roller 4 inside the magnetic roller 4 and extending in the axial direction of the magnetic roller 4, and the length of the permanent magnets 41 is the same as the length of the magnetic roller 4.

[0058] Specifically, the cross section of the permanent magnet parallel to the secondary feeding hopper 3 is generally fan-shaped, one end of the fan-shaped angle is arranged towards the central axis of the magnetic roller 4, and the other end is arranged towards the material flow. In the embodiment of the application, the symmetry plane of the permanent magnet is in the same plane as the central axis of the magnetic roller 4.

[0059] The cross-sectional circumferential angle of the permanent magnets 41 perpendicular to the central axis of the magnetic roller 4 is E, 110°≤E≤130°, and the cross-sectional circumferential angle of the permanent magnets 41 in the embodiment of the application is preferably 120°. By setting the cross-sectional circumferential angle of the permanent magnets 41 to be preferably 120°, the secondary separation area is improved, thereby improving the recovery rate of magnetite.

[0060] Specifically, the magnetic field strength of the permanent magnets 41 is F, 1.1D≤F≤1.2D, and the magnetic field strength of the permanent magnets 41 in the embodiment of the application is preferably 345mT. By setting the magnetic field strength of the magnetic separator 2 to be greater than the magnetic field strength of the magnetic separator 2, the weakly magnetic ore or ore-gangue intergrowth in the waste discharged from the primary feeding hopper 1 can be adsorbed, avoiding the weakly magnetic ore or ore-gangue intergrowth from being discharged as waste rock, thereby improving the recovery rate of magnetite.

[0061] The secondary separation unit further comprises a secondary motor 7 connected with the magnetic roller 4, the secondary motor 7 drives the magnetic roller 4 to rotate in the circumferential direction of the magnetic roller 4, so that the material adsorbed by the permanent magnets 41 falls off the magnetic roller 4.

[0062] The secondary motor 7 can be a transmission motor, the secondary motor 7 is arranged on the third platform, and the output end of the secondary motor 7 is rotatably connected with one end of the magnetic roller 4. The magnetic roller 4 is driven to rotate in the circumferential direction of the magnetic roller 4 by the secondary motor 7.

[0063] Specifically, the permanent magnet is used to adsorb the ore or ore-gangue intergrowth with weak magnetism on the surface of the magnetic roller 4. In the embodiment of the application, the permanent magnet remains stationary during the rotation of the magnetic roller 4, and the ore or ore-gangue intergrowth with weak magnetism on the surface of the magnetic roller 4 moves away from the adsorption area of the permanent magnet along with the rotation of the magnetic roller 4, so that the dry separation and waste throwing operation of the magnetite can be realized, and the work efficiency is improved.

[0064] In the application, the magnetic separation cylinder is rotationally connected with the secondary motor 7, and the magnetic separation cylinder is driven to rotate by the secondary motor 7, so that the material adsorbed by the permanent magnet is separated from the adsorption area of the permanent magnet along with the rotation of the magnetic roller 4, and the secondary dry separation and waste throwing operation of the magnetite can be realized, and the recovery rate of the magnetite is improved.

[0065] The deep separation device further comprises a primary discharge hopper 8, the primary discharge hopper 8 comprises a primary ore discharge chamber 81 and a primary waste rock discharge chamber 82, and the primary feeding hopper 1 is connected with the primary feeding hopper 1 through the primary waste rock discharge chamber 82, and the primary magnetic separation waste is discharged into the secondary feeding hopper 3 through the primary waste rock discharge chamber 82.

[0066] The primary discharge hopper 8 is arranged, and the waste after the primary separation can be arranged in a strip-shaped and bundled manner in the vertical direction through the inclined and narrowed opening of the primary discharge hopper 8, so that the adsorption effect of the secondary separation unit is improved, the primary waste rock is re-separated through the secondary separation, the field strength of the secondary magnetic separation is 1.1-1.2 times that of the primary magnetic separation, the part of the magnetite-gangue intergrowth with weak magnetism in the primary waste rock can be recovered, the high-field-strength secondary deep separation further improves the comprehensive recovery rate of the magnetic iron, and the economic benefit of the ore dressing plant is ensured.

[0067] The primary ore discharge chamber 81 is used to discharge the primary selected magnetic ore.

[0068] The primary discharge hopper 8 is connected with the secondary separation unit through the primary separation unit, one end of the primary discharge hopper 8 close to the primary separation unit is in a circular ring shape, and the other end is in a rectangular shape, so that the waste after the primary separation can be arranged in a strip-shaped and bundled manner in the vertical direction, and the adsorption effect of the secondary separation unit is improved.

[0069] The cross-sectional area of the primary discharge hopper 8 gradually decreases in the first direction, and in the embodiment of the application, the inclination angle of the generatrix of the first discharge hopper is the same as the inclination angle of the generatrix of the primary feeding hopper 1, that is, 80°.

[0070] Specifically, the first-stage discharge hopper 8 is divided into a first-stage ore discharge chamber 81 and a first-stage waste rock discharge chamber 82 near one end of the second-stage separation unit, the first-stage ore discharge chamber 81 is arranged corresponding to the magnetic material adsorption area with an upper circumferential angle of 60°, and the magnetic ore is discharged through the first-stage ore discharge chamber 81, and the first-stage waste rock discharge chamber 82 is arranged corresponding to the non-magnetic material adsorption area with an upper circumferential angle of 300°, and the ore with weak magnetism and the ore-vein intergrowth are discharged through the first-stage waste rock discharge chamber 82.

[0071] In the present application, the first-stage feeding hopper 1, the magnetic separation body 2 and the first-stage discharge hopper 8 are all annular structures with a small upper opening and a large lower opening and a busbar inclination angle of 75-85 degrees, which not only guarantees sufficient separation area, but also ensures that the material has sufficient longitudinal rolling and downward movement separation distance on the annular surface, optimizes the separation effect, and improves the recovery rate of the magnetite.

[0072] The second-stage feeding hopper 3 includes a second-stage ore discharge chamber 12 and a second-stage waste rock discharge chamber 13, the magnetic ore separated by the second-stage separation unit is discharged through the second-stage ore discharge chamber 12, the secondary magnetic separation waste separated by the second-stage separation unit is discharged through the second-stage waste rock discharge chamber 13, and the second-stage separation unit further includes a partition plate 9 connected to the second-stage feeding hopper 3 through a base, the partition plate 9 is arranged on the side of the magnetic roller 4 away from the first-stage feeding hopper 1, the partition plate 9 extends along the radial direction of the second-stage feeding hopper 3, the partition plate 9 includes a first guide surface and a second guide surface, the top end of the first guide surface is connected to the top end of the second guide surface to form a sharp angle, the bottom end of the first guide surface extends towards the second-stage ore discharge chamber 12, and the bottom end of the second guide surface extends towards the second-stage waste rock discharge chamber 13.

[0073] The partition plate 9 is triangular, the sharp end of the triangle is arranged towards the magnetic roller 4, the first guide surface is the outer wall of the triangle formed by the partition plate 9 and close to the second-stage ore discharge chamber 12, and the second guide surface is the outer wall of the triangle formed by the partition plate 9 and close to the second-stage waste rock discharge chamber 13.

[0074] The partition plate is arranged to divide the end of the second-stage feeding hopper 3 away from the first-stage feeding hopper 1 into the second-stage ore discharge chamber 12 and the second-stage waste rock discharge chamber 13, so that the waste rock and the ore-vein intergrowth after separation can be discharged from the ore discharge chamber, the waste rock after separation can be discharged from the waste rock discharge chamber, the partition plate 9 can avoid the waste rock after separation from mixing with the ore with weak magnetism and the ore-vein intergrowth, the ore with weak magnetism and the ore-vein intergrowth can be discharged in time, and the recovery rate of the magnetic iron ore is improved.

[0075] The partition plate 9 can be triangular, the sharp end of the partition plate 9 is arranged towards the material flow, and the partition plate 9 is connected to the second-stage feeding hopper 3 through a base and a bottom plate.

[0076] Specifically, the partition plate 9 is fixedly connected with the base, and the base is slidingly connected with the bottom plate, so that the partition plate 9 can slide along the length direction of the bottom plate, different separation of the products of the ore and waste rock can be realized by changing the position of the partition plate 9, and the efficient recovery of the magnetic ore is ensured, and the recovery rate of the magnetic iron in the pre-selection is ensured.

[0077] The magnetic separation device further comprises a crushing part 10, which is arranged on the side of the primary separation unit away from the secondary separation unit, and is coaxially arranged with the primary separation unit.

[0078] By arranging the crushing part 10, the crusher, the primary separation unit, the secondary separation unit and the discharge hopper can be integrated on the same longitudinal rack 11 from top to bottom, forming an integrated arrangement of cone crushing and pre-selection tail throwing, thereby creating a crushing-coarse magnetic separation-sweep magnetic separation integrated machine. This way has high integration degree, small occupation area, and does not need to arrange an additional independent pre-selection belt conveyor and pre-selection plant, thereby reducing the equipment investment, plant investment, operation and maintenance cost of the equipment.

[0079] The crushing part 10 comprises a crusher, which can be a cone crusher or other material outlet circular ring-shaped crushing equipment, and the application does not make further limitation.

[0080] Specifically, the crushing part 10 further comprises a transmission motor, which is arranged on the first platform and can be connected with the moving cone of the crusher, so as to drive the moving cone to rotate and crush the material entering the crusher.

[0081] The crushing part 10 can be vertically arranged, and the crushing part 10 is perpendicular to the first platform. The crushing part 10 is connected with the primary separation unit, and the crushing part 10 can be arranged on the axial side of the primary separation unit. In the embodiment of the application, the primary separation unit is arranged below the crushing part 10, and the material is crushed by the crushing part 10 and then enters the primary separation unit.

[0082] The deep sorting device provided in the embodiment of the application can perform twice magnetic separation on ores through the magnetic selection body 2 and the magnetic roller 4. The waste produced by the first magnetic separation of the magnetic selection body 2 is subjected to the second magnetic separation through the magnetic roller 4. The magnetic field strength of the magnetic roller 4 is greater than that of the magnetic selection body 2, so that the ores with weak magnetism and the ore-ore body in the waste of the first magnetic separation are adsorbed on the magnetic roller 4. The two times of sorting achieve the purpose of deep sorting, improve the recovery rate of the magnetite, and improve the economic benefit of the ore dressing plant. Meanwhile, the crushing part 10 is connected with the first sorting unit, so that the crushing operation and the waste throwing operation of the pre-selection are integrated, the equipment integration is realized, the independent pre-selection belt conveyor and the pre-selection plant house are avoided, the investment cost of the equipment and the plant house is reduced, the structure of the deep sorting device is simple, the volume is small, and a plurality of workers are not needed to guard the equipment, so that the operation cost and the maintenance cost of the equipment are reduced.

Claims

1. A depth sorting device, characterized in that, The system includes a primary sorting unit and a secondary sorting unit. The secondary sorting unit is located on the axial side of the primary sorting unit. The primary sorting unit includes a primary feed hopper (1) and a magnetic separator (2). The magnetic separator (2) is located inside the primary feed hopper (1) and is coaxially arranged with the primary feed hopper (1). The magnetic separator (2) is used to perform preliminary sorting on the material in the primary feed hopper (1) to discharge the primary magnetic separation waste. The secondary sorting unit includes a secondary feed hopper (3) and a magnetic roller (4). The secondary feed hopper (3) is connected to the primary feed hopper (1). The primary magnetic separation waste enters the secondary feed hopper (3) from the primary feed hopper (1). The magnetic roller (4) is located inside the secondary feed hopper (3). The magnetic field strength of the magnetic roller (4) is greater than that of the magnetic separator (2). The magnetic roller (4) is used to further sort the primary magnetic separation waste. The deep separation device also includes a primary discharge hopper (8), which includes a primary ore discharge chamber (81) and a primary waste rock discharge chamber (82). The primary feed hopper (1) is connected to the secondary feed hopper (3) through the primary waste rock discharge chamber (82). The primary magnetic separation waste is discharged into the secondary feed hopper (3) through the primary waste rock discharge chamber (82). The cross-sectional area of ​​the primary discharge hopper (8) gradually decreases in the first direction; The first-stage discharge hopper (8) is circular at one end near the first-stage sorting unit and rectangular at the other end; The magnetic roller (4) is located inside the secondary feed hopper (3) on the side away from the material flow; The primary feed hopper (1) and the magnetic separator (2) are annular. The cross-sectional area of ​​the primary feed hopper (1) and the magnetic separator (2) near the secondary feed hopper (3) is greater than the cross-sectional area away from the secondary feed hopper (3). The generatrix inclination angle of the primary feed hopper (1) and the magnetic separator (2) is A, 70°≤A≤80°. The magnetic separator (2) includes an electromagnetic plate (21), a contact ring (22), and a contact switch (23). The electromagnetic plate (21) is electrically connected to the contact ring (22) through the contact switch (23). Multiple electromagnetic plates (21) are provided and are evenly arranged around the circumference of the primary feed hopper (1). The circumferential angle of the cross section of the electromagnetic plate (21) is B, 10°≤B≤20°. The circumferential angle of the cross section of the contact ring (22) is C, 290°≤C≤310°. The contact ring (22) is used to control the start and stop of the electromagnetic plate (21).

2. The depth sorting device according to claim 1, characterized in that, The primary sorting unit also includes a rotating shaft (5) and a primary motor (6). The primary motor (6) is connected to the magnetic separator (2) through the rotating shaft (5). The primary motor (6) drives the magnetic separator (2) to rotate along the circumferential direction of the primary feed hopper (1) through the rotating shaft (5).

3. The depth sorting device according to claim 2, characterized in that, The primary sorting unit also includes a control module, which is electrically connected to the contact ring (22) and is used to control the current intensity of the contact ring (22). The control module is also electrically connected to the primary motor (6) and is used to control the start-up, stop and rotation speed of the primary motor (6). The magnetic field strength of the magnetic separator (2) is D, 100mT≤D≤500mT.

4. The depth sorting device according to claim 3, characterized in that, The magnetic roller (4) includes a permanent magnet (41), which is arranged inside the magnetic roller (4) along the circumferential direction of the magnetic roller (4) and extends in the axial direction of the magnetic roller (4). The permanent magnet (41) is fan-shaped, and the circumferential angle of the cross section of the permanent magnet (41) is E, 110°≤E≤130°. The magnetic field strength of the permanent magnet (41) is F, 1.1D≤F≤1.2D.

5. The depth sorting device according to claim 4, characterized in that, The secondary sorting unit also includes a secondary motor (7), which is connected to the magnetic roller (4). The secondary motor (7) drives the magnetic roller (4) to rotate in the circumferential direction of the magnetic roller (4) so ​​that the material adsorbed by the permanent magnet (41) falls off the magnetic roller (4).

6. The depth sorting device according to claim 1, characterized in that, The secondary feed hopper (3) includes a secondary ore discharge chamber (12) and a secondary waste rock discharge chamber (13). The magnetic ore separated by the secondary sorting unit is discharged through the secondary ore discharge chamber (12), and the secondary magnetic separation waste separated by the secondary sorting unit is discharged through the secondary waste rock discharge chamber (13). The secondary sorting unit also includes a partition plate (9). The partition plate (9) is connected to the secondary feed hopper (3) through a base. The partition plate (9) is located on the side of the magnetic roller (4) away from the primary feed hopper (1). The partition plate (9) extends along the radial direction of the secondary feed hopper (3). The partition plate (9) includes a first guide surface and a second guide surface. The top end of the first guide surface and the top end of the second guide surface are connected to form a sharp angle. The bottom end of the first guide surface extends toward the secondary ore discharge chamber (12), and the bottom end of the second guide surface extends toward the secondary waste rock discharge chamber (13).

7. The depth sorting device according to claim 1, characterized in that, The depth sorting device further includes a crushing section (10), which is disposed on the side of the primary sorting unit away from the secondary sorting unit. The crushing section (10) is connected to the primary sorting unit and is coaxially arranged with the primary sorting unit.

Images