A hole-type iron remover and an iron removal method

Abstract

The present invention relates to a hole-type iron remover and an iron removal method. The hole-type iron remover includes a vibration unit, a hole-type iron removal unit, an ore discharge hopper and an iron impurity collection tank; the vibration unit is composed of a vibration box body, a vibration source and a spring seat; the hole-type iron removal unit is composed of a hole bar conveyor, a power connection plate and a contact switch; the present invention uses the hole bar conveyor as the feeding device of the crusher, and an iron impurity adsorption section and an iron impurity discharge section are arranged on the hole bar conveyor; the vibration box body provides vibration force, and the non-magnetic minerals jump forward on the hole bar conveyor and fall into the lower crusher through the material dropping holes on the hole bars; the feeding operation and the iron removal operation are completed simultaneously on the same equipment, the iron removal device and the feeding device are integrated, and the external dimension of the equipment is small, reducing the space occupation and investment cost.

Description

Technical Field

[0001] The present invention relates to the technical field of ore dressing, and particularly to a pore type iron remover and an iron removal method. Background Art

[0002] Most non-magnetic ore species are embedded with relatively fine particle sizes and need to undergo grinding and separation to obtain high-quality concentrate products. The maximum particle size of the ore mined in the stope is usually 600 - 1200 mm, while the feed particle size for grinding is generally below 12 mm. Therefore, a crushing operation needs to be set before grinding.

[0003] Generally, the mined ore needs to undergo continuous three-stage to four-stage crushing before entering the grinding process to make its particle size meet the particle size requirements for grinding. Except for coarse crushing, medium crushing, fine crushing, and ultra-fine crushing are restricted by their small feed particle sizes, and their crushing chamber widths are also small, and it is very easy to be stuck by various ironware mixed in with sizes larger than the feed ore size, resulting in damage to the crusher. Therefore, in the feeding links of medium crushing, fine crushing, and ultra-fine crushing, iron removal operations must be carried out to protect the crusher.

[0004] Currently, the iron removal operation for non-magnetic ore generally adopts the method of suspending an independent iron removal device (such as a disc iron remover or a belt iron remover) above the feeding belt of the crusher. For example, the "iron chip removal device" disclosed in the Chinese patent application with the application publication number CN108580035A sets a belt above the feeding trough, with a permanent magnet inside the belt. The vibrating motor vibrates the feeding trough, and the conical plate lifts the material. The iron chips in the material are adsorbed on the belt and finally scraped off by the discharge plate and fall into the iron collection box. The Chinese utility model patent with the authorization announcement number CN204769116U discloses an "iron removal device", which includes a belt conveying mechanism installed on the frame. There is a bracket on one side of the frame, and two supports are respectively fixedly welded on the bracket. Two wheels are respectively rotatably installed on the two supports, and a box body is connected to the wheels through an annular traction rope. The box body is located directly above the belt conveying mechanism, and there are magnetic blocks inside the box body. The box body is suspended on the wheels through the annular traction rope and can swing under the action of magnetic force. The coal cinder moves forward with the conveying mechanism, and the iron in it will be adsorbed to the bottom surface of the box body to achieve the purpose of iron removal.

[0005] The above method using an independent iron removal device increases the overall specifications of the equipment, occupies a large space, and has relatively high equipment purchase and workshop construction investment. Summary of the Invention

[0006] The present invention provides a hole-type iron remover and an iron removal method. A hole-bar conveyor is used as a feeding device for a crusher, and an iron impurity adsorption section and an iron impurity discharge section are arranged on the hole-bar conveyor. The vibrating box body provides a vibrating force. Non-magnetic minerals jump forward on the hole-bar conveyor and fall into the crusher below through the material dropping holes on the hole bars. The feeding operation and the iron removal operation are completed simultaneously on the same device. The iron removal device and the feeding device are integrated into one, and the external dimension of the device is small, reducing the space occupation and investment cost.

[0007] In order to achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0008] A hole-type iron remover includes a vibration unit, a hole-type iron removal unit, an ore discharge hopper and an iron impurity collection tank. The vibration unit consists of a vibrating box body, a vibration source and a spring seat. The vibrating box body is inclined and arranged on the spring seat, and a vibration source is arranged at the top of the vibrating box body. Under the action of the vibration source, the whole vibrating box body vibrates up and down. The hole-type iron removal unit consists of a hole-bar conveyor, a power connection board and a contact switch. The hole-bar conveyor is arranged in the vibrating box body and vibrates with the vibrating box body. The hole-bar conveyor is arranged parallel to the vibrating box body, and the feeding end of the hole-bar conveyor is higher than the other end. The hole-bar conveyor adopts the structure of a chain plate conveyor, and the hole bars are used instead of the chain plates. The hole bars are made of electromagnetic materials, and a plurality of material dropping holes are longitudinally opened on the hole bars. Along the material conveying direction, the hole-bar conveyor is divided into an iron impurity adsorption section and an iron impurity discharge section. A power connection board is arranged on one side of the hole-bar conveyor corresponding to the iron impurity adsorption section, and the power connection board is electrically connected to the contact switch arranged at the end of the hole bar. The bottom of the vibrating box body is of an open structure. An ore discharge hopper is arranged below the hole-bar conveyor corresponding to the iron impurity adsorption section, and an iron impurity collection tank is arranged below the hole-bar conveyor corresponding to the iron impurity discharge section.

[0009] Further, the vibration source consists of a driving motor, a transmission shaft, two eccentric excitation blocks and a connecting frame. The driving motor is arranged on one side of the vibrating box body. The motor shaft of the driving motor is connected to the transmission shaft arranged above the vibrating box body. The two eccentric excitation blocks are symmetrically arranged at both ends of the transmission shaft. The transmission shaft is rotationally connected to the connecting frame through a bearing seat, and the connecting frame is connected to the top of the vibrating box body.

[0010] Further, a hole-type iron remover further includes a foundation platform. The vibrating box body is arranged on the foundation platform through a spring seat. The ore discharge hopper is connected to the foundation platform through a discharge hopper base, and the iron impurity collection tank is connected to the foundation platform through a collection tank base. Both the ore discharge hopper and the iron impurity collection tank are of a funnel-shaped structure with a large upper opening and a small lower opening.

[0011] Further, the spring seat consists of four groups of springs and an insulating rubber base. The four groups of springs are respectively arranged at the four corners of the bottom of the vibrating box body, and insulating rubber bases are correspondingly arranged at the bottoms of the springs.

[0012] Further, the hole strip conveyor includes a driving motor, a driving roller, hole strips, a chain and a longitudinal beam; a plurality of hole strips are hinged to each other by the chain to form an endless conveyor belt, and both ends of the endless conveyor belt are respectively sleeved on the outer sides of the driving rollers at the corresponding ends; the driving motor is arranged on one side of the vibration box body, and the motor shaft of the driving motor is connected to the rotating shaft of one of the driving rollers; both ends of the rotating shaft of the driving roller are connected to the longitudinal beam through corresponding bearing seats, and the longitudinal beam is connected to the side wall of the vibration box body; driven by the driving motor, the driving roller drives the endless conveyor belt to perform an endless conveying motion.

[0013] Further, the driving motor is arranged at one end of the iron impurity discharge section, and the driving roller at the corresponding end is the driving roller; the starting point of the iron impurity discharge section is located 0.5 - 1 m away from the driving roller on the upper endless conveyor belt, and the end point is located at the end of the upper endless conveyor belt; the rest area of the upper endless conveyor belt is the iron impurity adsorption section.

[0014] Further, the width of the hole strip is 200 - 500 mm; the blanking hole is a strip-shaped hole, and the width of the blanking hole is 0.90 - 0.98 times the maximum particle size of the iron impurity allowed to pass through the crusher, and the width of the blanking hole is 2 - 3 times the maximum particle size of the non-magnetic ore.

[0015] Further, the power connection board is arranged on the longitudinal beam; the thickness of the power connection board is 10 - 30 mm, a power connection groove with a width of 5 - 10 mm is arranged in the middle of the power connection board, and insulating rubber strips are arranged on both sides of the power connection groove; the contact switch is arranged at the corresponding end of each hole strip, the contact switch is a spring type contact switch, and the contact of the contact switch is elastically connected to the power connection groove.

[0016] Further, a hole type iron remover further includes a control system; the driving motor of the vibration unit and the driving motor of the hole strip conveyor are both frequency conversion motors; the control ends of the frequency conversion motors and the current intensity control end of the power connection board are respectively connected to the control system.

[0017] Based on the iron removal method of the hole type iron remover, the following steps are included:

[0018] 1) The non-magnetic ore to be crushed is fed into the upper part of the hole strip conveyor from the feeding end. While the hole strip conveyor vibrates with the vibration box body, the non-magnetic ore makes a forward throwing motion on the upper layer of the hole strip conveyor; every time it is thrown off and falls onto the surface of the upper endless conveyor belt, part of the non-magnetic ore will be unloaded from the blanking holes on the hole strip and enter the crusher through the ore discharge hopper below;

[0019] 2) During the process of the non-magnetic ore being conveyed to the other end of the hole strip conveyor, step 1) is continuously repeated until all of them pass through the blanking holes on the hole strip; during this process, the hole strips on the upper endless conveyor belt passing through the iron impurity adsorption section adsorb the iron impurities in the non-magnetic ore under the action of magnetic force; the magnetic field intensity adjustment range of the hole strip is 30 - 100 mT;

[0020] 3) When the upper annular conveyor belt moves to the iron impurity discharge section, the hole strip is powered off, the magnetic force disappears, and the iron impurities adsorbed on the hole strip fall into the iron impurity collection tank below.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1) Adsorb iron impurities in non-magnetic ores in the iron impurity adsorption section of the hole strip conveyor. The vibration box provides vibration force to make the non-magnetic ores perform a forward throwing motion. The non-magnetic ores that fall onto the surface of the hole strip are discharged through the material dropping holes to the crusher below; the iron impurities adsorbed by the hole strip conveyor are unloaded into the iron impurity collection tank in the iron impurity discharge section; under the action of magnetic force and vibration force, the removal of iron impurities and the feeding of the crusher are realized, that is, two operations are completed on one device at the same time, without the need to set up an independent iron removal device, occupying less space and reducing the investment in equipment and workshops;

[0023] 2) The length of the iron impurity adsorption section on the hole strip conveyor accounts for the vast majority of the total length, ensuring sufficient vibration and adsorption time. The size of the material dropping holes on the hole strip allows the ores to pass through, so as to ensure that all non-magnetic ores are discharged through the material dropping holes to the crusher, avoiding the loss of ore resources;

[0024] 3) The material dropping holes on the hole strip adopt long strip holes, which have the largest opening rate, thereby increasing the effective material dropping area of the hole strip and optimizing the ore discharging conditions; the design of the material dropping hole size forms an interception of large-size iron impurities while ensuring that all ores pass through, thus effectively protecting the subsequent crushing equipment;

[0025] 4) A power connection groove is provided in the middle of the power connection plate, insulating rubber strips are provided on both sides of the power connection groove, and the contact switch adopts a spring-type contact switch. After the contact of the contact switch contacts the power connection plate, the spring compresses to energize the hole strip of the electromagnetic material, realizing the magnetization of the hole strip. This power connection method has rapid power connection and disconnection, and eliminates the risk of contact leakage, ensuring the safety of the operation;

[0026] 5) By controlling the magnitude of the current applied to the hole strip, the adjustment of the electromagnetic field strength between 30 and 100 mT can be realized, thereby realizing the control and adjustment of the iron impurity adsorption force; the drive motor of the vibration unit adopts variable frequency speed regulation, which can realize the control and adjustment of the vibration intensity; the drive motor of the hole strip conveyor adopts variable frequency speed regulation, which can realize the adjustment of the residence time of non-magnetic ores in the iron impurity adsorption section, that is, the control and adjustment of the adsorption time; through the comprehensive application of the above control means, the iron removal effect is ensured while avoiding the loss of ores;

[0027] 6) The control end of the drive motor of the vibration unit, the control end of the drive motor of the hole strip conveyor, and the current intensity control end of the contact switch are all connected to the control system, realizing automatic control and adjustment, with a high degree of automation. Description of the Drawings

[0028] Figure 1 is the front sectional view of a hole-type iron remover according to the present invention.

[0029] Figure 2 is Figure 1 the top view of

[0030] Figure 3 is the schematic connection diagram of the power connection board and the contact switch according to the present invention.

[0031] In the figure: 1. Vibration box body; 2. Eccentric excitation block; 3. Driving motor; 4. Ore discharge hopper; 5. Iron impurity collection tank; 6. Discharge hopper base; 7. Collection tank base; 8. Foundation platform; 9. Spring; 10. Hole bar conveyor; 11. Power connection board; 12. Longitudinal beam; 13. Hole bar; 14. Chain; 15. Driving roller; 16. Driving motor; 17. Feeding hole; 18. Contact switch; 19. Power connection groove; 20. Insulating rubber strip; 21. Insulating rubber base Specific embodiments

[0032] The following further describes the specific embodiments of the present invention with reference to the accompanying drawings:

[0033] As Figure 1 , Figure 2 shown, a hole-type iron remover according to the present invention includes a vibration unit, a hole-type iron removal unit, an ore discharge hopper 4 and an iron impurity collection tank 5; the vibration unit consists of a vibration box body 1, a vibration source and a spring seat; the vibration box body 1 is inclined and arranged on the spring seat, a vibration source is arranged at the top of the vibration box body 1, and under the action of the vibration source, the vibration box body 1 vibrates up and down as a whole; the hole-type iron removal unit consists of a hole bar conveyor 10, a power connection board 11 and a contact switch 1; the hole bar conveyor 10 is arranged in the vibration box body 1 and vibrates with the vibration box body 1, the hole bar conveyor 10 is arranged parallel to the vibration box body 1, and the feeding end of the hole bar conveyor 10 is higher than the other end; the hole bar conveyor 10 adopts the structure of a chain plate conveyor, and hole bars 13 are used instead of chain plates, the hole bars 13 are made of electromagnetic materials, and a plurality of feeding holes 17 are longitudinally opened on the hole bars 13; along the material conveying direction, the hole bar conveyor 10 is divided into an iron impurity adsorption section and an iron impurity discharge section, a power connection board 11 is arranged on one side of the hole bar conveyor 10 corresponding to the iron impurity adsorption section, and the power connection board 11 is electrically connected to a contact switch 18 arranged at the end of the hole bar 13; the bottom of the vibration box body 1 is of an open structure, an ore discharge hopper 4 is arranged below the hole bar conveyor 10 corresponding to the iron impurity adsorption section, and an iron impurity collection tank 5 is arranged below the hole bar conveyor 10 corresponding to the iron impurity discharge section.

[0034] Further, the vibration source is composed of a driving motor 3, a transmission shaft, two eccentric excitation blocks 2 and a connecting frame; the driving motor 3 is arranged on one side of the vibration box body 1, the motor shaft of the driving motor 3 is connected to the transmission shaft arranged above the vibration box body 1, the two eccentric excitation blocks 2 are symmetrically arranged at both ends of the transmission shaft, the transmission shaft is rotationally connected to the connecting frame through a bearing seat, and the connecting frame is connected to the top of the vibration box body 1.

[0035] Further, the pore type iron remover of the present invention further includes a foundation platform 8, the vibration box body 1 is arranged on the foundation platform 8 through a spring seat, the ore discharge hopper 4 is connected to the foundation platform 8 through a discharge hopper base 6, and the iron impurity collection tank 5 is connected to the foundation platform 8 through a collection tank base 7; both the ore discharge hopper 4 and the iron impurity collection tank 5 are in a funnel-shaped structure with a large upper opening and a small lower opening.

[0036] Further, the spring seat is composed of 4 groups of springs 9 and an insulating rubber base 21, the 4 groups of springs 9 are respectively arranged at the four corners of the bottom of the vibration box body 1, and the insulating rubber bases 21 are correspondingly arranged at the bottoms of the springs 9.

[0037] Further, the pore bar conveyor 10 includes a driving motor 16, a driving roller 15, pore bars 13, a chain 14 and a longitudinal beam 12; a plurality of pore bars 13 are hinged to each other through the chain 14 to form an endless conveyor belt, and both ends of the endless conveyor belt are respectively sleeved on the outer sides of the driving rollers 15 at the corresponding ends; the driving motor 16 is arranged on one side of the vibration box body 1, and the motor shaft of the driving motor 16 is connected to the rotating shaft of one of the driving rollers 15; both ends of the rotating shaft of the driving roller 15 are connected to the longitudinal beam 12 through corresponding bearing seats, and the longitudinal beam 12 is connected to the side wall of the vibration phase body 1; driven by the driving motor 16, the driving roller 15 drives the endless conveyor belt to perform an endless conveying motion.

[0038] Further, the driving motor 16 is arranged at one end of the iron impurity discharge section, and the driving roller 15 at the corresponding end is the driving roller; the starting point of the iron impurity discharge section is located 0.5 - 1 m away from the driving roller on the upper endless conveyor belt, and the end point is located at the end of the upper endless conveyor belt; the remaining area of the upper endless conveyor belt is the iron impurity adsorption section.

[0039] Further, the width of the pore bar 13 is 200 - 500 mm; the blanking hole 17 is a strip-shaped hole, the width of the blanking hole 17 is 0.90 - 0.98 times the maximum particle size of the iron impurities allowed to pass through the crusher, and the width of the blanking hole 17 is 2 - 3 times the maximum particle size of the non-magnetic ore.

[0040] Further, the power connection plate 11 is arranged on the longitudinal beam 12; the thickness of the power connection plate 11 is 10 - 30 mm, a power connection groove 19 with a width of 5 - 10 mm is arranged in the middle of the power connection plate 11, and insulating rubber strips 20 are arranged on both sides of the power connection groove 19; the contact switch 18 is arranged at the corresponding end of each hole strip 13, the contact switch 18 is a spring-type contact switch, and the contact of the contact switch 18 is elastically connected to the power connection groove 19.

[0041] Further, the pore type iron remover of the present invention further includes a control system; the drive motor 3 of the vibration unit and the drive motor 16 of the pore strip conveyor 10 are both variable frequency motors; the control ends of the variable frequency motors and the current intensity control end of the power connection plate 11 are respectively connected to the control system.

[0042] The iron removal method based on a pore type iron remover of the present invention includes the following steps:

[0043] 1) The non-magnetic ore to be crushed is fed into the upper part of the pore strip conveyor 10 from the feeding end. While the pore strip conveyor 10 vibrates with the vibration box body 1, the non-magnetic ore makes a forward throwing motion on the upper layer of the pore strip conveyor 10; each time it is thrown off and falls onto the surface of the upper annular conveyor belt, part of the non-magnetic ore will be unloaded from the material dropping holes 17 on the pore strips 13 and enter the crusher through the ore discharge hopper 4 below;

[0044] 2) During the process of transporting the non-magnetic ore to the other end of the pore strip conveyor 10, step 1) is continuously repeated until all of it passes through the material dropping holes 17 on the pore strips 13; during this process, the pore strips 13 on the upper annular conveyor belt passing through the iron impurity adsorption section adsorb the iron impurities in the non-magnetic ore under the action of magnetic force; the magnetic field intensity adjustment range of the pore strips 13 is 30 - 100 mT;

[0045] 3) When the upper annular conveyor belt moves to the iron impurity discharge section, the pore strips 13 are powered off, the magnetic force disappears, and the iron impurities adsorbed on the pore strips 13 fall into the iron impurity collection tank 5 below.

[0046] The following embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation manners and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments. The methods used in the following embodiments are all conventional methods unless otherwise specified.

[0047]

Embodiment

[0048] In this embodiment, the pore type iron remover includes a vibration unit, a pore type iron removal unit, an ore discharge hopper 4 and an iron impurity collection tank 5.

[0049] The vibration unit is composed of a vibration box body 1, two eccentric excitation blocks 2 symmetrically arranged on the rotating shaft above the vibration box body 1, a driving motor 3 placed outside the vibration box body 1 and connected to the rotating shaft through a coupling, and a connecting frame connecting the rotating shaft and the vibration box body 1. The rotating shaft is rotatably connected to the connecting frame through a bearing seat.

[0050] The vibration box body 1 is arranged obliquely with the feeding end higher than the other end. Below the vibration box body 1, an ore discharge hopper 4 and an iron impurity collection tank 5 are provided along the material movement and conveying direction. Both the ore discharge hopper 4 and the iron impurity collection tank 5 are in the shape of a funnel with a larger upper part and a smaller lower part. The ore discharge hopper 4 and the iron impurity collection hopper 5 are provided with corresponding discharge hopper bases 6 and collection tank bases 7, and the discharge hopper base 6 and the collection tank base 7 are respectively fixedly connected to the foundation platform 8 through bolts.

[0051] One set of spring supports is provided at each of the four corners of the vibration box body 1. At the bottom of the spring 9 in each set of spring supports, an insulating rubber base 21 is provided, and the insulating rubber base 21 is connected to the foundation platform 8 through bolts.

[0052] The hole-type iron removal unit is composed of a hole strip conveyor 10, a power connection board 11 and a contact switch 19. The hole strip conveyor 10 is arranged in parallel with the vibration box body 1 inside the vibration box body 1 and is connected to the vibration box body 1 through the longitudinal beams 12 on both sides.

[0053] The annular conveyor belt on the hole strip conveyor 10 is composed of hole strips 13 with a width of 300 mm hinged to each other through chains 14. Strip-shaped blanking holes 17 are evenly distributed on each hole strip 13. In this embodiment, the width of the blanking hole 17 is 0.95 times the maximum particle size of the iron impurities allowed to pass through by the crusher, and the width of the blanking hole 17 is 2 times the maximum particle size of the non-magnetic ore.

[0054] The hole strip 13 is made of an electromagnetic material, and the magnetic field intensity of the hole strip 13 is adjustable, with an adjustment range of 30 - 100 mT.

[0055] In the hole strip conveyor 10, the drive motor 16 for driving the rotation of the driving roller is placed outside the vibration box body 1, and the drive motor 16 is connected to the motor foundation welded to the side wall of the vibration box body 1 through bolts.

[0056] The hole strip conveyor 10 is divided into an iron impurity adsorption section and an iron impurity discharge section along the material conveying direction. The drive motor 16 is arranged at one end of the iron impurity discharge section. The starting point of the iron impurity discharge section is located 0.8 m away from the driving roller on the upper annular conveyor belt, and the end point is located at the end of the upper annular conveyor belt. The remaining area of the upper annular conveyor belt is the iron impurity adsorption section.

[0057] The ore discharge hopper 4 is located below the iron impurity adsorption section of the hole strip conveyor 10, and the iron impurity collection tank 5 is located below the iron impurity discharge section of the hole strip conveyor 10.

[0058] On one side of the hole bar conveyor 10 corresponding to the iron impurity adsorption section, a power connection plate 11 is provided (the power connection plate 11 is not provided on the longitudinal beam 12 corresponding to the iron impurity discharge section). The power connection plate 11 is arranged on the longitudinal beam 12. One end of each hole bar 13 is respectively provided with a contact switch 18. In this embodiment, the contact switch 18 adopts a spring type contact switch. The thickness of the power connection plate 11 is 20 mm. A power connection groove 19 with a width of 8 mm is provided in the middle of the power connection plate 11. Both sides of the power connection groove 19 are insulating rubber strips 20.

[0059] The drive motor 3 of the vibration unit and the drive motor 16 of the hole bar conveyor 10 are both variable frequency motors. The current intensity of the power connection plate 11 is adjustable. The control ends of the drive motor 3 and the drive motor 16 and the current intensity control end of the power connection plate 11 are all connected to the control system.

Claims

1. A method for iron removal, which is implemented based on a hole-type iron remover, characterized in that, The pore-type iron remover includes a vibration unit, a pore-type iron removal unit, an ore discharge hopper and an iron impurity collection tank, and also includes a control system; the vibration unit consists of a vibration box body, a vibration source and a spring seat; the vibration box body is inclined and arranged on the spring seat, a vibration source is arranged at the top of the vibration box body, and under the action of the vibration source, the whole vibration box body vibrates up and down; the pore-type iron removal unit consists of a pore bar conveyor, a power connection plate and a contact switch; the pore bar conveyor is arranged in the vibration box body and vibrates with the vibration box body, the pore bar conveyor is arranged parallel to the vibration box body, and the feeding end of the pore bar conveyor is higher than the other end; the pore bar conveyor adopts the structure of a chain plate conveyor, with pore bars replacing the chain plates, the pore bars are made of electromagnetic materials, and a plurality of blanking holes are longitudinally opened on the pore bars; along the material conveying direction, the pore bar conveyor is divided into an iron impurity adsorption section and an iron impurity discharge section, a power connection plate is arranged on one side of the pore bar conveyor corresponding to the iron impurity adsorption section, and the power connection plate is electrically connected to the contact switch arranged at the end of the pore bar; the bottom of the vibration box body is of an open structure, an ore discharge hopper is arranged below the pore bar conveyor corresponding to the iron impurity adsorption section, and an iron impurity collection tank is arranged below the pore bar conveyor corresponding to the iron impurity discharge section; The width of the pore bar is 200-500mm; the blanking hole is a strip-shaped hole, the width of the blanking hole is 0.90-0.98 times the maximum particle size of the iron impurity allowed to pass through by the crusher, and the width of the blanking hole is 2-3 times the maximum particle size of the non-magnetic ore; The power connection plate is arranged on the longitudinal beam; the thickness of the power connection plate is 10-30mm, a power connection groove with a width of 5-10mm is arranged in the middle of the power connection plate, and insulating rubber strips are arranged on both sides of the power connection groove; the contact switch is arranged at the corresponding end of each pore bar, the contact switch is a spring-type contact switch, and the contact of the contact switch is elastically connected to the power connection groove; The drive motor of the vibration unit and the drive motor of the pore bar conveyor are both variable-frequency motors; the control end of the variable-frequency motor and the current intensity control end of the power connection plate are respectively connected to the control system; The iron removal method includes the following steps: 1) The non-magnetic ore to be crushed is fed into the upper part of the pore bar conveyor from the feeding end. While the pore bar conveyor vibrates with the vibration box body, the non-magnetic ore makes a forward throwing motion on the upper layer of the pore bar conveyor; each time it is thrown off and falls onto the surface of the upper annular conveyor belt, part of the non-magnetic ore will be unloaded from the blanking holes on the pore bars and enter the crusher through the ore discharge hopper below; 2) During the process of the non-magnetic ore being conveyed to the other end of the pore bar conveyor, step 1) is continuously repeated until all of it passes through the blanking holes on the pore bars; during this process, the pore bars on the upper annular conveyor belt passing through the iron impurity adsorption section adsorb the iron impurities in the non-magnetic ore under the action of magnetic force; the magnetic field intensity adjustment range of the pore bars is 30-100mT; 3) When the upper annular conveyor belt moves to the iron impurity discharge section, the pore bars are powered off, the magnetic force disappears, and the iron impurities adsorbed on the pore bars fall into the iron impurity collection tank below.

2. The iron removal method according to claim 1, characterized in that, The vibration source consists of a driving motor, a transmission shaft, two eccentric excitation blocks and a connecting frame; the driving motor is arranged on one side of the vibration box body, the motor shaft of the driving motor is connected to the transmission shaft arranged above the vibration box body, the two eccentric excitation blocks are symmetrically arranged at both ends of the transmission shaft, the transmission shaft is rotatably connected to the connecting frame through a bearing seat, and the connecting frame is connected to the top of the vibration box body.

3. A method for iron removal according to claim 1, characterized in that, It further includes a foundation platform. The vibration box body is arranged on the foundation platform through a spring seat. The ore discharge hopper is connected to the foundation platform through a discharge hopper base, and the iron impurity collection tank is connected to the foundation platform through a collection tank base; both the ore discharge hopper and the iron impurity collection tank are in a funnel-shaped structure with a large upper opening and a small lower opening.

4. A method for iron removal according to claim 1, characterized in that, The spring seat consists of 4 groups of springs and an insulating rubber base. The 4 groups of springs are respectively arranged at the four corners of the bottom of the vibration box body, and insulating rubber bases are correspondingly arranged at the bottoms of the springs.

5. A method for iron removal according to claim 1, characterized in that The perforated strip conveyor includes a driving motor, a driving roller, a perforated strip, a chain and a longitudinal beam; a plurality of perforated strips are hinged to each other through the chain to form an endless conveyor belt, and both ends of the endless conveyor belt are respectively sleeved on the outer sides of the driving rollers at the corresponding ends; the driving motor is arranged on one side of the vibration box body, and the motor shaft of the driving motor is connected to the rotating shaft of one of the driving rollers; both ends of the rotating shaft of the driving roller are connected to the longitudinal beam through corresponding bearing seats, and the longitudinal beam is connected to the side wall of the vibration body; driven by the driving motor, the driving roller drives the endless conveyor belt to perform an endless conveying movement.

6. The iron removal method according to claim 5, characterized in that, The driving motor is arranged at one end of the iron impurity discharge section, and the driving roller at the corresponding end is the driving roller; the starting point of the iron impurity discharge section is located 0.5 - 1 m away from the driving roller on the upper endless conveyor belt, and the end point is located at the end of the upper endless conveyor belt; the remaining area of the upper endless conveyor belt is the iron impurity adsorption section.

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