A magnetic separation device with rough separation and sweep separation functions

Abstract

The application belongs to the technical field of mining magnetic separation equipment, and provides a magnetic separation device with roughing and scavenging functions, which comprises an upper rack, a machine box arranged on the rack, a magnetic separation roller rotatably arranged in the machine box through a bearing, a discharge chute fixedly connected to one side of the machine box and used for discharging the iron ore after magnetic separation, a box cover fixed to the machine box, a feeding mechanism and a scavenging mechanism arranged on the box cover, and a driving mechanism arranged on the rack and used for driving the magnetic separation roller, the feeding mechanism and the scavenging mechanism to operate. The magnetic separation device with roughing and scavenging functions provided by the application realizes the integrated operation of roughing and scavenging, and reduces the problems of ore accumulation, adsorption and falling.

Description

Technical Field

[0001] This invention belongs to the technical field of magnetic separation equipment for mining, and particularly relates to a magnetic separation device with coarse and sweep functions. Background Technology

[0002] In the mineral resource sorting process, magnetic separation is a key process for recovering iron minerals. Roughing aims to quickly separate large amounts of gangue minerals, while scavenging is used to recover fine-grained or weakly magnetic iron minerals that were not captured in the roughing process.

[0003] Currently, to achieve integrated roughing and scavenging, a single magnetic drum structure is often used. By setting different magnetic field intensities in different areas of the magnetic drum, the roughing and scavenging operations are completed in the same rotation process. However, due to the difference in magnetic field intensity in different areas of the magnetic drum, the adsorption force of iron minerals on the surface of the magnetic drum is inconsistent, resulting in poor magnetic separation effect for large particles of ore. Due to their large weight, large particles of ore are difficult to be stably adsorbed on the surface of the magnetic drum even in the strong magnetic field environment of the roughing area, which easily leads to problems such as weak adsorption, detachment, or incomplete separation, thus reducing the recovery rate of iron minerals. Summary of the Invention

[0004] This invention provides a magnetic separator with coarse and sweep functions, aiming to solve the problem of poor magnetic separation effect of mineral materials mentioned in the background art.

[0005] The present invention is implemented as follows: a magnetic separator with coarse and scavenging functions, comprising: an upper frame; a housing mounted on the frame, wherein a magnetic separation roller is rotatably mounted in the housing via bearings; a discharge chute fixedly connected to one side of the housing for discharging magnetically separated iron ore; a cover fixed on the housing; a feeding mechanism and a scavenging mechanism mounted on the cover; and a drive mechanism mounted on the frame for driving the magnetic separation roller, the feeding mechanism, and the scavenging mechanism.

[0006] Preferably, the feeding mechanism includes: a guide cylinder fixed on the machine housing; a conduit fixedly connected to the guide cylinder, the discharge end of the conduit being fixedly connected to the housing cover; and a spiral shaft rotatably mounted inside the guide cylinder via bearings.

[0007] Preferably, the sweeping mechanism includes: a primary screening box fixedly connected to the guide cylinder; a sieve plate fixed inside the primary screening box, the sieve plate being conical; a first rotating rod rotatably mounted on the primary screening box via bearings, the bottom end of the first rotating rod being fixed with a connecting frame; and a sweeping plate fixed to the connecting frame by bolts.

[0008] Preferably, the drive mechanism includes: a motor and a speed regulator fixed on the frame, the output shaft of the motor being fixedly connected to the input shaft of the speed regulator via a coupling, and the output shaft of the speed regulator being fixedly connected to the shaft of the magnetic separator roller via a coupling; a first transmission rod rotatably mounted on the housing cover via a bearing seat, the bottom end of the first transmission rod being fixed with a first bevel gear meshing with the output shaft of the speed regulator; and second bevel gears fixed to the first transmission rod and the spiral shaft respectively and meshing with each other.

[0009] Preferably, the drive mechanism further includes: a second transmission rod rotatably mounted on the primary selection box via a bearing seat; pulleys fixed to the helical shaft and the second transmission rod respectively; a transmission belt sleeved on the pulleys; and a third bevel gear fixed to the second transmission rod and the first rotating rod respectively and meshing with each other.

[0010] Preferably, the primary screening box is provided with a discharge mechanism for discharging the ore intercepted by the screen plate. The discharge mechanism includes: a discharge cylinder fixedly connected to one side of the primary screening box; a second rotating rod rotatably installed in the discharge cylinder via a bearing; a plurality of blades fixed on the second rotating rod, the blades being arranged in a ring array; and a fourth bevel gear fixed on the second rotating rod and meshing with each other.

[0011] Preferably, the top of the primary selection box is fixedly connected to a feed hopper, and the bottom of the machine box is fixedly connected to a discharge cylinder for discharging slag, and a valve is provided on the discharge cylinder.

[0012] Preferably, a water spray pipe is fixed to the outer wall of the casing by a pipe rack for connecting to a water supply device for spraying water. The water spray pipe is equipped with several nozzles, and the water outlet of the nozzles faces the discharge trough.

[0013] Preferably, a guide plate is fixed at an inclination inside the primary screening box, with the lower end of the guide plate corresponding to the middle area of ​​the screen plate, used to guide the ore falling from the feed hopper to the screening area of ​​the screen plate.

[0014] Preferably, a polyurethane board is provided at the bottom of the sweeping plate, a pad is symmetrically fixed at the bottom of the frame, and the blades on the spiral shaft are bidirectional spiral blades, which are symmetrically distributed with the central axis of the spiral shaft as the center of symmetry.

[0015] Compared with related technologies, the magnetic separator with coarse and fine separation functions provided by the present invention has the following advantages:

[0016] The core magnetic separation framework consists of a frame, housing, and magnetic rollers. The feeding mechanism, including the guide cylinder, guide tube, and spiral shaft with bidirectional spiral blades, ensures uniform material transport. The scavenging mechanism, with its primary screening box, conical screen, and scavenging plate with polyurethane board, completes the material classification. The mechanism is driven by a motor, speed controller, and multiple sets of bevel gears and belt pulleys. With the assistance of the discharge mechanism, water spray pipe, and guide plate, it achieves integrated roughing and scavenging operations, reducing problems such as material accumulation and adsorption / detachment, and helping to improve the iron ore recovery rate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of a magnetic separator with coarse and fine separation functions provided by the present invention;

[0018] Figure 2 This is a schematic diagram of the main cross-sectional structure of a magnetic separator with coarse and sweep functions provided by the present invention;

[0019] Figure 3 for Figure 2 An enlarged structural diagram of part A shown in the figure;

[0020] Figure 4 for Figure 2 An enlarged structural diagram of part B shown in the figure;

[0021] Figure 5 for Figure 2 An enlarged structural diagram of section C shown in the figure;

[0022] Figure 6 This is a schematic diagram of the structure of the second rotating rod and the blade in this invention.

[0023] Reference numerals in the attached diagram: 1. Frame; 2. Chassis; 3. Magnetic separator roller; 4. Discharge chute; 5. Discharge cylinder; 6. Valve; 7. Cover; 8. Guide cylinder; 9. Guide tube; 10. Preliminary separator box; 11. Feed hopper; 12. Screen plate; 13. First rotating rod; 14. Connecting frame; 15. Sweeping plate; 16. Spiral shaft; 17. Discharge cylinder; 18. Second rotating rod; 19. Blade; 20. Motor; 21. Speed ​​regulator; 22. First transmission rod; 23. First bevel gear; 24. Second bevel gear; 25. Second transmission rod; 26. Pulley; 27. Transmission belt; 28. Third bevel gear; 29. ​​Fourth bevel gear; 30. Guide plate; 31. Water spray pipe. Detailed Implementation

[0024] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0025] This invention provides a magnetic separator with coarse and fine separation functions, such as... Figure 1-6 As shown, the magnetic separator with roughing and scavenging functions includes: an upper frame 1; a housing 2 mounted on the frame 1, wherein a magnetic separation roller 3 is rotatably mounted in the housing 2 via bearings; a discharge chute 4 fixedly connected to one side of the housing 2 for discharging the magnetically separated iron ore; a cover 7 fixed on the housing 2; a feeding mechanism and a scavenging mechanism mounted on the cover 7; and a drive mechanism mounted on the frame 1 for driving the magnetic separation roller 3, the feeding mechanism, and the scavenging mechanism.

[0026] In this embodiment, after the drive mechanism is started, it drives the magnetic separation roller 3, the feeding mechanism and the sweeping mechanism to run synchronously. The ore enters the machine box 2 through the feeding mechanism. The feeding mechanism can uniformly convey the ore, so that the ore can smoothly contact the magnetic separation roller 3, laying the foundation for subsequent magnetic separation operations.

[0027] During the rotation of the magnetic separator 3, the ore is roughed out, and most of the iron minerals are separated. The fine particles or weakly magnetic iron minerals that are not captured by the roughing process continue to move with the ore and are further sorted by the scavenging mechanism, thus realizing the integrated operation of roughing and scavenging.

[0028] The iron ore that has undergone roughing and scavenging is discharged through the discharge chute 4. This device improves the magnetic separation effect of large-particle ore by coordinating the feeding mechanism, scavenging mechanism and magnetic separation roller 3, reducing issues such as weak adsorption and detachment, which helps to improve the recovery rate of iron ore, while simplifying the magnetic separation process and improving operating efficiency.

[0029] In a further preferred embodiment of the present invention, the feeding mechanism includes: a guide cylinder 8 fixed on the housing 2; a conduit 9 fixedly connected to the guide cylinder 8, the discharge end of the conduit 9 being fixedly connected to the housing cover 7; and a spiral shaft 16 rotatably mounted in the guide cylinder 8 via a bearing.

[0030] In this embodiment, when the drive mechanism is running, it drives the spiral shaft 16 to rotate inside the guide cylinder 8. After the ore is fed into the guide cylinder 8, the spiral shaft 16 generates a conveying force by rotating, pushing the ore towards both ends of the guide tube 9, providing power support for the subsequent transmission of the ore.

[0031] The guide cylinder 8 serves to limit and guide the ore, preventing it from scattering during transportation. The rotation of the screw shaft 16 pushes the ore into the guide tube 9 continuously and smoothly, reducing congestion during transportation.

[0032] The ore enters the housing 2 through the discharge end of the guide tube 9 and comes into contact with the magnetic separation roller 3. The feeding mechanism, through the cooperation of the guide cylinder 8, the guide tube 9 and the spiral shaft 16, realizes the orderly conveying of the ore, which helps to improve the uniformity of the contact between the ore and the magnetic separation roller 3, and creates conditions for the stable development of subsequent magnetic separation operations.

[0033] In a further preferred embodiment of the present invention, the sweeping mechanism includes: a primary screening box 10 fixedly connected to the guide cylinder 8; a sieve plate 12 fixed inside the primary screening box 10, the sieve plate 12 being conical; a first rotating rod 13 rotatably mounted on the primary screening box 10 via bearings, the bottom end of the first rotating rod 13 being fixed with a connecting frame 14; and a sweeping plate 15 fixed to the connecting frame 14 by bolts.

[0034] In this embodiment, after the ore enters the primary screening box 10, it first falls on the conical screen plate 12. The conical structure of the screen plate 12 allows the ore to be naturally dispersed along its surface. Large particles of ore are initially intercepted by the screen plate 12, while fine particles are conveyed downward through the screen holes of the screen plate 12.

[0035] The drive mechanism drives the first rotating rod 13 to rotate through the transmission structure. The first rotating rod 13 drives the connecting frame 14 to rotate synchronously, thereby causing the sweeping plate 15 on the connecting frame 14 to rotate along the surface of the screen plate 12, sweeping and combing the large particles of mineral material intercepted on the screen plate 12.

[0036] The rotation of the sweeping plate 15 can reduce the accumulation of large particles of mineral material on the screen plate 12, and promote the smooth entry of large particles of mineral material into the subsequent magnetic separation stage. The cooperation between the screen plate 12 and the sweeping plate 15 realizes the initial classification of mineral material, which helps to improve the separation effect of the subsequent magnetic separation roller 3 on mineral materials of different particle sizes and ensures the continuity of magnetic separation operation.

[0037] In a further preferred embodiment of the present invention, the driving mechanism includes: a motor 20 and a speed regulator 21 fixed on the frame 1, the output shaft of the motor 20 being fixedly connected to the input shaft of the speed regulator 21 via a coupling, and the output shaft of the speed regulator 21 being fixedly connected to the shaft of the magnetic separator 3 via a coupling; a first transmission rod 22 rotatably mounted on the cover 7 via a bearing seat, the bottom end of the first transmission rod 22 being fixedly connected to the output shaft of the speed regulator 21 with a first bevel gear 23 meshing with each other; and a second bevel gear 24 being fixedly connected to the first transmission rod 22 and the spiral shaft 16 respectively and meshing with each other.

[0038] In this embodiment, after the motor 20 starts, it drives the speed regulator 21 to run through the coupling. The speed regulator 21 can adjust the output speed according to the operation requirements. Then, it drives the shaft of the magnetic separator 3 to rotate through the coupling, providing suitable power and speed support for the magnetic separation operation of the magnetic separator 3.

[0039] When the output shaft of the speed regulator 21 rotates, it drives the first bevel gear 23 fixed on it to mesh and drive, which in turn drives the first transmission rod 22 to rotate around the bearing seat. The first transmission rod 22 meshes with the second bevel gear 24 on the screw shaft 16 through the second bevel gear 24 at its end, and transmits power to the screw shaft 16.

[0040] The drive mechanism achieves synchronous drive of the magnetic separator 3 and the spiral shaft 16 through the cooperation of the motor 20, the speed regulator 21 and the bevel gear set. It eliminates the need for multiple power sources, which simplifies the equipment structure. At the same time, the speed regulation function of the speed regulator 21 can adapt to the sorting requirements of different minerals, which helps to improve the flexibility and stability of the equipment operation.

[0041] In a further preferred embodiment of the present invention, the driving mechanism further includes: a second transmission rod 25 rotatably mounted on the initial selection box 10 via a bearing seat; a pulley 26 fixed on the spiral shaft 16 and the second transmission rod 25 respectively; a transmission belt 27 sleeved on the pulley 26; and a third bevel gear 28 fixed on the second transmission rod 25 and the first rotating rod 13 respectively and meshing with each other.

[0042] In this embodiment, when the spiral shaft 16 rotates, it drives the pulley 26 fixed on it to rotate synchronously. The power is transmitted through the transmission belt 27 sleeved on the pulley 26, so that the second transmission rod 25 on the initial selection box 10 rotates around the bearing seat.

[0043] During the rotation of the second transmission rod 25, the third bevel gear 28 at its end meshes with the third bevel gear 28 on the first rotating rod 13, thereby driving the first rotating rod 13 to rotate and providing power for the operation of the sweeping mechanism.

[0044] The transmission structure uses the cooperation of pulley 26, transmission belt 27 and third bevel gear 28 to realize the transmission of power from the spiral shaft 16 to the first rotating rod 13, so that the feeding mechanism and the sweeping mechanism can share the same power source.

[0045] In a further preferred embodiment of the present invention, the primary screening box 10 is provided with a discharge mechanism for discharging the ore material intercepted by the screen plate 12. The discharge mechanism includes: a discharge cylinder 17 fixedly connected to one side of the primary screening box 10; a second rotating rod 18 rotatably mounted in the discharge cylinder 17 via bearings; a plurality of blades 19 fixed on the second rotating rod 18, the blades 19 being arranged in a ring array; and a fourth bevel gear 29 fixed on the second rotating rod 18 and the spiral shaft 16 and meshing with each other.

[0046] In this embodiment, when the spiral shaft 16 rotates, the second rotating rod 18 is driven to rotate inside the discharge cylinder 17 through the meshing fourth bevel gear 29, and the second rotating rod 18 synchronously drives the blades 19 arranged in a ring array on it to rotate.

[0047] During the rotation of the blade 19, it exerts a pushing effect on the ore intercepted by the screen plate 12, so that the ore can smoothly enter the discharge cylinder 17 and avoid accumulating in the primary selection box 10.

[0048] The material discharge mechanism transmits power through the fourth bevel gear 29 and achieves the orderly discharge of intercepted ore through the rotation of the blade 19.

[0049] In a further preferred embodiment of the present invention, the top of the primary selection box 10 is fixedly connected to a feed hopper 11, and the bottom of the casing 2 is fixedly connected to a discharge cylinder 5 for discharging slag. A valve 6 is provided on the discharge cylinder 5.

[0050] In this embodiment, the ore enters the equipment through the feed hopper 11 fixedly connected to the top of the primary selection box 10. The feed hopper 11 provides a centralized feeding channel for the ore, so that the ore can fall onto the screen plate 12 inside the primary selection box 10 in a directional manner, creating conditions for subsequent grading operations.

[0051] After the magnetic separation operation is completed, the slag settles to the bottom of the machine box 2. The discharge cylinder 5, which is fixedly connected to the bottom of the machine box 2, provides a discharge path for the slag. The operator can adjust the timing and speed of slag discharge by controlling the valve 6 on the discharge cylinder 5.

[0052] The feeding hopper 11 ensures smooth feeding of ore, and the cooperation between the discharge cylinder 5 and the valve 6 enables the orderly discharge of slag, preventing slag from accumulating in the machine box 2 and affecting equipment operation, which helps to maintain the stable and continuous operation of magnetic separation.

[0053] In a further preferred embodiment of the present invention, a water spray pipe 31 is fixed on the outer wall of the casing 2 by a pipe rack for connecting to a water supply device for spraying water. The water spray pipe 31 is provided with a plurality of nozzles, and the water outlet end of the nozzles faces the discharge trough 4.

[0054] In this embodiment, during operation, the water spray pipe 31 is connected to an external water supply device, and the water supply device supplies water to the water spray pipe 31. The water source forms a water flow through several nozzles on the water spray pipe 31 and sprays it toward the discharge trough 4.

[0055] The water flow acts on the surface of the iron ore that has undergone magnetic separation in the discharge trough 4, washing away the dust, fine slag and other impurities carried by the ore, reducing the adhesion of impurities.

[0056] The combination of the water spray pipe 31 and the nozzle enables online cleaning of iron ore, which helps to improve the cleanliness of the discharged iron ore. At the same time, the water flow can assist the iron ore to flow in the discharge trough 4, reduce accumulation, and ensure smooth discharge.

[0057] In a further preferred embodiment of the present invention, a guide plate 30 is inclinedly fixed inside the primary screening box 10. The lower end of the guide plate 30 corresponds to the middle area of ​​the screen plate 12 and is used to guide the ore falling from the feed hopper 11 to the screening area of ​​the screen plate 12.

[0058] In this embodiment, after the ore falls from the feed hopper 11 into the primary selection box 10, it first contacts the inclined and fixed guide plate 30. The inclined structure of the guide plate 30 guides the ore and guides it to move in a specific direction.

[0059] Guided by the guide plate 30, the ore is smoothly conveyed to the middle area of ​​the screen plate 12, so that the ore can accurately enter the effective screening range of the screen plate 12.

[0060] In a further preferred embodiment of the present invention, a polyurethane board is provided at the bottom of the sweeping plate 15, a pad is symmetrically fixed at the bottom of the frame 1, and the blades on the spiral shaft 16 are bidirectional spiral blades, which are symmetrically distributed with the central axis of the spiral shaft 16 as the center of symmetry.

[0061] In this embodiment, the polyurethane plate at the bottom of the sweeping plate 15 rotates synchronously with the sweeping plate 15 and forms a flexible contact with the surface of the screen plate 12, which reduces the wear on the screen plate 12 while sweeping the ore and extends the service life of both.

[0062] The symmetrically fixed pads at the bottom of the frame 1 provide stable support for the entire equipment and raise the distance between the frame 1 and the ground, which not only facilitates the placement and leveling of the equipment, but also provides maintenance space for the bottom components.

[0063] In summary, compared with related technologies, the core magnetic separation framework, consisting of frame 1, housing 2, and magnetic roller 3, is used to achieve uniform material conveying in conjunction with the feed mechanism's guide cylinder 8, guide tube 9, and spiral shaft 16 with bidirectional spiral blades. The ore grading is completed by the primary selection box 10, conical screen plate 12, and sweeping plate 15 with polyurethane plate of the scavenging mechanism. The coordinated operation of each mechanism is driven by motor 20, speed regulator 21, and multiple sets of bevel gears and belt pulleys. With the assistance of components such as discharge mechanism, water spray pipe 31, and guide plate 30, the integrated operation of roughing and scavenging is achieved, reducing problems such as ore accumulation and adsorption shedding, and helping to improve the iron ore recovery rate.

[0064] It is worth noting that the circuits, electronic components, and modules involved in this invention are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this invention does not involve improvements to the software and methods.

[0065] It should be understood, in the several embodiments provided in this application, that the disclosed apparatus may be implemented in other ways.

[0066] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not depart from the concept of the present invention. These technical solutions are also within the scope of protection of the present invention.

Claims

1. A magnetic separator with coarse and fine separation functions, characterized in that, include: frame; A housing mounted on the frame contains a magnetic separation roller that is rotatably mounted inside the housing via bearings. A discharge chute is fixedly connected to one side of the chassis for discharging magnetically separated iron ore; A cover fixed to the chassis; The feeding mechanism and the sweeping mechanism are installed on the box cover; The drive mechanism mounted on the frame is used to drive the magnetic separator, the feeding mechanism and the sweeping mechanism.

2. The magnetic separator with coarse and fine separation functions as described in claim 1, characterized in that, The feeding mechanism includes: A guide cylinder fixed to the chassis; A conduit is fixedly connected to the guide cylinder, and the outlet end of the conduit is fixedly connected to the box cover; The spiral shaft, mounted inside the feed tube, rotates via bearings.

3. The magnetic separator with coarse and fine separation functions as described in claim 2, characterized in that, The scanning mechanism includes: A primary selection box is fixedly connected to the feed cylinder; A sieve plate fixed inside the primary selection box, the sieve plate being conical; The first rotating rod is rotatably mounted on the initial selection box via a bearing, and a connecting frame is fixed at the bottom end of the first rotating rod; The sweeping plate is fixed to the connecting frame by bolts.

4. The magnetic separator with coarse and fine separation functions as described in claim 3, characterized in that, The drive mechanism includes: A motor and a speed regulator are fixed on the frame. The output shaft of the motor is fixedly connected to the input shaft of the speed regulator via a coupling. The output shaft of the speed regulator is fixedly connected to the shaft of the magnetic separator roller via a coupling. The first transmission rod is rotatably mounted on the cover of the box via a bearing seat. The bottom end of the first transmission rod is fixed with a first bevel gear that meshes with the output shaft of the speed regulator. The second bevel gears are fixed to the first transmission rod and the helical shaft respectively and mesh with each other.

5. The magnetic separator with coarse and fine separation functions as described in claim 4, characterized in that, The drive mechanism also includes: The second transmission rod, which is rotatably mounted on the primary selection box via a bearing housing, is used to rotate the primary selection box. Pulleys are respectively fixed on the spiral shaft and the second transmission rod; A transmission belt fitted onto the pulley; A third bevel gear is fixed to the second transmission rod and the first rotating rod respectively and meshes with each other.

6. The magnetic separator with coarse and fine separation functions as described in claim 3, characterized in that, The primary screening box is equipped with a discharge mechanism for discharging the ore material intercepted by the screen plate. The discharge mechanism includes: A discharge cylinder is fixedly connected to one side of the primary selection box; The second rotating rod, which is rotatably mounted inside the discharge cylinder, is rotatably connected by a bearing. Several blades are fixed on the second rotating rod, and the blades are arranged in a ring array; A fourth bevel gear fixed to and meshing with the second rotating rod and the helical shaft.

7. The magnetic separator with coarse and fine separation functions as described in claim 3, characterized in that, The top of the primary selection box is fixedly connected to a feed hopper, and the bottom of the machine box is fixedly connected to a discharge cylinder for discharging slag. A valve is installed on the discharge cylinder.

8. The magnetic separator with coarse and fine separation functions as described in claim 1, characterized in that, A water spray pipe is fixed to the outer wall of the casing by a pipe rack for connecting to a water supply device for spraying water. Several nozzles are provided on the water spray pipe 31, and the water outlet of the nozzles faces the discharge trough 4.

9. The magnetic separator with coarse and fine separation functions as described in claim 3, characterized in that, The primary selection box is fixed at an incline with a guide plate. The lower end of the guide plate corresponds to the middle area of ​​the screen plate and is used to guide the ore falling from the feed hopper to the screening area of ​​the screen plate.

10. The magnetic separator with coarse and fine separation functions as described in claim 3, characterized in that, The bottom of the sweeping plate is provided with a polyurethane board, and the bottom of the frame is symmetrically fixed with pads. The blades on the spiral shaft are bidirectional spiral blades, which are symmetrically distributed with the central axis of the spiral shaft as the center of symmetry.

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