CN101823020A - Permanent magnet vibration module type magnetic separator - Google Patents

Abstract

A permanent magnet vibration modular magnetic separator, characterized in that: the magnetic separator includes a frame (2), a sorting device installed above the frame (2) through a vibrating mechanism, and the sorting device includes a sorting device The selection cavity (13), the feeding port (11) at the top of the sorting cavity, the discharge port (20) at the top and bottom of the sorting cavity, and the coaxial mode with the sorting cavity are arranged in the sorting cavity and vertically Extending straight down to at least one magnetism-gathering medium box (21) at the discharge port, a pair of permanent magnets that can be used for relative horizontal displacement of the coaxial line are respectively arranged on both sides of the magnetism-gathering medium box (21) (10).

Description

Permanent Magnetic Vibration Modular Magnetic Separator

technical field

The invention belongs to the technical field of mineral processing, and relates to a separation device for magnetic particles and non-magnetic particles in fine-grained materials, in particular to a permanent magnet vibration modular magnetic separator, which is convenient for large scale and can be used for coal burning Desulfurization, impurity removal and purification of non-metallic minerals and other fields.

Background technique

At present, most of the existing permanent magnet magnetic separators have a single arrangement of the magnetic system, the design of the magnetic circuit is cumbersome, and the generated magnetic induction is generally low. Stone and weak magnetic iron ore are selected. At the same time, the selection of permanent magnet magnetic separator equipment is too complicated and takes up too much space; in some application fields, the scope of application is narrow; and the arrangement of power source equipment provided during the material sorting process is unreasonable. These existing factors directly affect the beneficiation precision and beneficiation efficiency, and indirectly cause the economic benefit of the beneficiation plant to decline; the weak magnetic ores mixed in it cannot be selected, resulting in the loss of tailings and the waste of resources.

Chinese patent CN86106686A discloses a permanent magnetic cylinder type medium magnetic separator with a magnetic field strength of 5000-9000 Oersted, and proposes the idea of combining different permanent magnetic materials to increase the effective magnetic field strength. But this is an open magnetic separator, and the magnetic field force is not high enough. US Patent No. 4,769,130 discloses a high-gradient permanent magnet magnetic separator. A box-shaped sorting chamber is arranged in the gap between a pair of permanent magnet surfaces with opposite polarities, and a sorting medium is housed in the sorting chamber. This magnetic separator solves the problem of sorting magnetic materials with different strengths. But the production capacity of this sorting machine is small, the body weight is big, and the machine weight ratio is only greater than 0.5 (the machine weight ratio is the ratio of the production capacity Q1 of the machine when the machine is selected and the weight Q2 of the machine itself, that is, Q1: Q2 ≥ 0.5), and It is difficult to process and manufacture, and consumes a lot of materials.

Currently, the mechanical devices used for separating fine-grained iron in the processing of non-metallic mineral products include single-roller, double-roller, multi-roller, strong, medium and weak magnetic field and other types of magnetic separators. The efficiency of iron removal is low, and the highest can only reach 50%, large volume and high energy consumption. In particular, the general-purpose double-roller magnetic separator adopts the form of double-roller separation. If the material is not dried before beneficiation (reducing the absolute humidity), there will be serious sticking, which will make the machine unable to operate.

Chinese patent CN2269905Y discloses "Permanent Magnet Dry Type Automatic Iron Removal Magnetic Separator" and CN2130111Y discloses "Fine Material Dry Purification Magnetic Separator", which all provide the possibility for the dry operation of magnetic separation. However, since the former is "powder separation in the air-gap magnetic field channel", the latter is through "the inner cylinder swings to separate the magnetic and non-magnetic substances", which will inevitably lead to their structural complexity and operational complexity. Complicated, thus affecting the popularization and application.

However, for the magnetic separation of weak magnetic minerals such as manganese ore and hematite, electromagnetic induction roller-type strong magnetic separators are mostly used. Electromagnetic magnetic separators have problems such as high power consumption, easy blockage, and high cost; for current magnetic separation In the case of many and complicated applications of machines, it is imminent to find a permanent magnet magnetic separation equipment suitable for removing iron and impurities from non-metallic ore solid waste, which is low in cost, high in separation accuracy, large in processing capacity, and not easy to clog.

Contents of the invention

The object of the present invention is to provide a permanent magnet vibrating modular magnetic separator capable of separating magnetic and non-magnetic materials in fine-grained materials in view of the shortcomings in the prior art. This magnetic separator not only has the advantages of dry and wet mineral processing, but also adopts the modular layout of the magnetic system, and the separation space is an opposite-pole high-gradient magnetic separation; at the same time, it has the advantages of simple structure, convenient operation, and strong applicability. It can be used in coal-fired desulfurization, non-metallic ore impurity removal and purification and other fields.

The purpose of the present invention can be achieved through the following technical measures:

The permanent magnetic vibration modular magnetic separator of the present invention includes a frame, and a sorting device installed above the frame through a vibrating mechanism. The sorting device includes a sorting chamber, a feeding port at the top of the The discharge port at the top and bottom of the selection cavity, and at least one magnetic accumulation medium box arranged in the separation cavity in a coaxial manner with the separation cavity and extending vertically downwards to the discharge opening, in the magnetic accumulation medium box Both sides are provided with a pair of permanent magnetic steels which can be used for relative horizontal displacement movement of the coaxial line.

The vibration mechanism of the present invention includes an elastic support driven by a vibration source installed above the middle support frame of the frame, and a vibrating steel plate with a hollow structure in the center that is combined with the elastic support in a horizontal manner. The device is installed in the central hollow structure of the vibrating steel plate in a manner perpendicular to the plane of the vibrating steel plate, and is fixedly connected with the vibrating steel plate through the connecting piece.

According to the present invention, the two pairs of permanent magnetic steels capable of relative horizontal displacement movement are respectively combined with the piston rod ends of the horizontal hydraulic cylinders installed on the corresponding side above the frame frame. System—horizontal hydraulic cylinder drives the permanent magnetic steel to move out of the sorting chamber conveniently and quickly in the axial direction, so that the fine-grained magnetic materials fall off from the magnetic gathering medium. This set of hydraulic system can be correspondingly increased or decreased according to the design of the permanent magnet magnetic system to avoid unnecessary waste and greatly improve the automation of the whole set of devices.

The permanent magnets described in the present invention are all rectangular cubic structures with the same specifications, and the permanent magnets of high-performance NdFeB are used as the source of strong magnetic force for their materials, and every two pairs of permanent magnets are made of The side polarities are opposite to each other and arranged in the sorting chamber to form an opposite-pole magnetic separation space; and the outer side of each permanent magnet is designed with a series magnetic system, that is, the inner and outer sides of each permanent magnet are simultaneously A magnetic source can be provided; at the same time, the polarity distribution of the multi-group separation space constructed according to this arrangement is N-S-N-S arrangement.

The permanent magnet magnets described in the present invention are all assembled according to the polarity requirements, that is, one side surface of each permanent magnet magnet is fixed on a high-permeability magnetism-gathering plate, and the height of the high-permeability magnetism-gathering plate is slightly smaller than that of the permanent magnet magnet. The height of the steel makes the field strength of the permanent magnet steel show a step change from the upper end to the lower end, and provides a magnetic field source N pole on the inner surface of the permanent magnet steel along the radial direction of magnetization, and the magnetic field source N pole is opposite to the other set The S pole of the magnetic field source provided by the inner surface of the permanent magnetic steel forms a closed loop and provides a sorting space. This structural design of the present invention can reduce magnetic flux leakage to the greatest extent. In terms of the layout of the magnetic system, multiple series and parallel separation spaces can be constructed to increase the adaptability of the magnetic separator; the magnetic field area through which the sorted materials flow increases in the vertical direction, and the The sorting ability is improved accordingly; at the same time, the background field strength provided by each piece of connected permanent magnet steel is also different, which changes in steps in the vertical direction, and the magnetic materials of different strengths and weaknesses are correspondingly sorted.

The magnetic-gathering medium box of the present invention is made of non-magnetic stainless steel material, and the height of the magnetic-gathering medium box in the sorting chamber should be equal to the height of the high-field surface provided by each permanent magnetic steel, and its width should be less than The distance between the corresponding surfaces of two pairs of permanent magnetic steels is centered. The magnetism-gathering medium in the magnetism-gathering medium box is penetrated by the horizontally distributed strong magnetic force lines, generating a relatively high magnetic field gradient. The gap between the permanent magnet system and the magnetic gathering medium box can be adjusted appropriately according to the sorting requirements, so as to obtain a magnetic force distribution line that meets the sorting requirements and obtain satisfactory sorting indicators.

The three-phase asynchronous motor of the vibration source in the present invention provides the vibration source, and the vibration steel plate is driven to generate high-frequency vibration through the fastening connection of the stud, the compression spring, and the vibration steel plate, and then the fixed plate in contact with the upper surface of the vibration steel plate is driven to vibrate. At the same time, the sorting device is welded as a whole through the fixing plate while vertically passing through the center of the vibrating steel plate, which ensures the small amplitude vibration of the sorting chamber of the sorting device, and furthermore satisfies the requirement that the front and rear walls of the sorting chamber are arranged by The magnetic gathering medium box installed in the separation space constructed by the permanent magnetic steel driven by the hydraulic cylinder forms a moving state, so that when the powder material passes through the strong magnetic separation space, the non-magnetic material can completely fall off due to its own gravity and vibration force. Magnetic materials can be fully adsorbed on the magnetic stainless steel mesh. The machine has reasonable structure, simple sorting process, good effect, low power consumption and easy operation and maintenance.

The present invention mainly uses the modular design of the magnetic system to match the corresponding hydraulic system to improve the automation and applicability of the device. At the same time, the vibration source with a compact structure and reasonable layout is designed so that the materials can be completely obtained through the vibration force during the sorting process. Separation, improve sorting accuracy.

The beneficial effects of the present invention are as follows:

(1) The magnetic system adopts the N-S arrangement to build a modular design, and both sides of the middle magnetic pole can be used as magnetic sources, maximizing the efficiency of the magnetic pole;

(2) According to the separation requirements, multiple sets of magnetic systems can be added to build multiple sets of series and parallel separation spaces to broaden the applicable field of the magnetic separation device. At the same time, the entire set of magnetic system is arranged in a closed sorting chamber, which can shield the overflow of magnetic force lines and reduce the loss of magnetic flux. The magnetic circuit design is reasonable.

(3) Through the reasonable layout of the vibration system, the stress state of the material is increased, the material is dispersed and moved as much as possible, the mechanical inclusion of the dry powder material is reduced, and the separation effect is improved.

(4) When obtaining magnetic materials, the permanent magnetic steel can be conveniently withdrawn and entered in the axial direction through the corresponding hydraulic system, which is easy to coordinate, improves the flexibility and automation of the device, and has certain industrial application value.

(5) The equipment is easy to be enlarged-the horizontal increase can increase the processing capacity, and the vertical increase of the magnetic steel is beneficial to the yield of the magnetite concentrate.

Description of drawings

Fig. 1 is the overall frame diagram of the present invention.

FIG. 2 is a side view of FIG. 1 .

FIG. 3 is a top view of FIG. 1 .

Fig. 4A is a design diagram of the magnetic system of the module permanent magnet unit; Fig. 4B is a design diagram of the series connection of the permanent magnet magnetic system.

Fig. 5A is a design diagram of a two-stage parallel connection of a permanent magnet system; Fig. 5B is a top view of A; Fig. 5C is a side view of A.

Fig. 6A is a diagram of a multi-stage parallel unit of a permanent magnet system; Fig. 6B is a diagram of a multi-stage series and parallel connection of a permanent magnet system.

Serial numbers in the figure: 1. Main body frame; 2. Hydraulic support frame; 3. Spring gasket; 4. Compression spring; 5. Vibrating steel plate; 6. Lock nut; 7. Fixing bolt; 8. Fixing plate; 9. Magnetic gathering plate; 10. Permanent magnetic steel; 11. Feeding port; 12. Gasket; 13. Sorting chamber; 14. Piston rod; 15. Horizontal hydraulic cylinder; 16. Stud; 17. Bearing seat ; 18, connection key; 19, vibration source three-phase asynchronous motor; 20, discharge port; 21, magnetic gathering medium box; 22, radial magnetization.

Detailed ways

The present invention will be further described below in conjunction with embodiment (accompanying drawing):

As shown in Figures 1, 2, and 3, the permanent magnet vibration modular magnetic separator of the present invention includes a frame 2, and a sorting device installed on the top of the frame 2 by a vibration mechanism, and the sorting device includes a sorting chamber 13 , the feed port 11 at the top of the sorting chamber, the discharge port 20 at the top and bottom of the sorting chamber, and the coaxial mode with the sorting chamber is arranged in the sorting chamber and extends vertically downwards to the discharge port At least one magnetism gathering medium box 21, on both sides of said magnetism gathering medium box 21 are provided with a pair of permanent magnets 10 which can move relative to the horizontal displacement of the coaxial line.

The vibration mechanism of the present invention includes an elastic support driven by a vibration source installed above the middle support body of the frame 2, and a vibrating steel plate 5 with a hollow structure in the center of which is combined with the elastic support in a horizontal manner. The sorting device is installed in the central hollow structure of the vibrating steel plate in a manner perpendicular to the plane of the vibrating steel plate, and is fixedly connected to the vibrating steel plate 5 through a connecting piece.

The two pairs of permanent magnets 10 capable of relative horizontal displacement movement in the present invention are respectively combined with the piston rod ends of the horizontal hydraulic cylinders installed on the corresponding side above the frame 2 frame. More specifically: the horizontal hydraulic cylinder 15 is fixed on the frame 2, and one end of the piston rod 14 is fastened to the center of the permanent magnetic steel 10. During work, the horizontal hydraulic cylinder 15 drives the piston rod 14 to move in the axial direction. Stretching, the stroke of which can be greater than the width of the permanent magnet 15, so that when the magnetic material is obtained, the permanent magnet 10 can be completely moved out of the magnetic field area. The height of the permanent magnetic steel 10 should be less than the height of the sorting chamber 13, and its outer surface should have a certain interval with the inner wall of the sorting chamber 13, so as to meet the mobility when pulling. This structure can move the permanent magnetic steel out of the sorting chamber conveniently and quickly in the axial direction through the hydraulic system—horizontal hydraulic cylinder after sorting, so that the fine-grained magnetic materials fall off from the magnetic gathering medium. This set of hydraulic system can be correspondingly increased or decreased according to the design of the permanent magnet magnetic system to avoid unnecessary waste and greatly improve the automation of the whole set of devices.

Magnetic-gathering medium box 21 of the present invention adopts non-magnetic stainless steel to make, and the height of magnetic-gathering medium box in the sorting chamber should be equal to the high field intensity surface height that every piece of permanent magnetic steel provides, and its width should be It is less than the distance between the corresponding surfaces of the two pairs of permanent magnetic steels, and is arranged centrally. The magnetism-gathering medium in the magnetism-gathering medium box is penetrated by the horizontally distributed strong magnetic force lines, generating a relatively high magnetic field gradient. The gap between the permanent magnet system and the magnetic gathering medium box can be adjusted appropriately according to the sorting requirements, so as to obtain a magnetic force distribution line that meets the sorting requirements and obtain satisfactory sorting indicators.

The vibration source of the present invention is mainly connected to the vibrating steel plate 5 hollowed out in the center through the sorting main structure, and the vibration source is provided by the vibration source three-phase asynchronous motor 19 welded on the lower end of the vibrating steel plate 5, and the vibrating steel plate 5 passes through the stud 16 , the compression spring 4 is connected and locked and fixed together by the lock nut 6, which will ensure that the vibrating steel plate 5 vibrates and drives the sorting device to vibrate; the sorting device is welded on the fixed plate 8, and the fixed plate 8 is fixed by The bolt 7 is fixed on the surface of the vibrating steel plate 5, so that the vibration force of the vibrating steel plate 5 is transmitted to the magnetic gathering medium box 21 step by step while the vibrating steel plate 5 is vibrating, so that the magnetic gathering medium box in the sorting chamber 13 is fed from the feeding port 11 The materials in 21 are fully dispersed to improve the sorting efficiency. While the whole is vibrating, the permanent magnetic steel 10 is fixed to move in the axial direction by the horizontal hydraulic cylinder 15, and does not vibrate with the whole. The small-amplitude vibration of the sorting chamber of the sorting device is guaranteed, and the magnetic gathering medium box installed in the sorting space constructed by the permanent magnetic steel driven by the hydraulic cylinder on the front and rear walls of the sorting chamber is formed. In the state of motion, when the powder material passes through the strong magnetic separation space, the non-magnetic material can completely fall off due to its own gravity and vibration force, and the magnetic material can be fully adsorbed on the magnetic stainless steel plate net. The machine has reasonable structure, simple sorting process, good effect, low power consumption and easy operation and maintenance.

As shown in Fig. 1, 2,, 3, 4A, the permanent magnetic steel 10 of the present invention described in the present invention is the same rectangular cube structure of specification, and its material adopts the permanent magnetic steel of high performance NdFeB as the strong magnetic force source, And every two pairs of permanent magnet steels are all arranged in the sorting chamber in an arrangement mode opposite to the inner surface of the magnetic accumulation medium box 21, forming a counter-pole type magnetic separation space; and the outer surface of each permanent magnet steel The side adopts a series magnetic system design, that is, the inside and outside of each permanent magnet steel can provide a magnetic source at the same time; at the same time, the multi-group separation space constructed according to this arrangement has a polarity distribution of N-S-N-S arrangement.

The permanent magnet magnets 10 of the present invention are all assembled according to the polarity requirements, that is, one side surface of each permanent magnet magnet is fixed on the high magnetic permeability and magnetic gathering plate 9, and the height of the high magnetic permeability and magnetic gathering plate 9 is slightly less than The height of the permanent magnet steel 10 makes the field strength of the permanent magnet steel 10 show a gradient change from the upper end to the lower end, and provides a magnetic field source N pole on the inner surface of the permanent magnet steel 10 along the radial direction of magnetization. The magnetic field source N The pole forms a closed loop with the S pole of the magnetic field source provided by the inner surface of another permanent magnetic steel oppositely arranged to provide a sorting space. This structural design of the present invention can reduce magnetic flux leakage to the greatest extent. In terms of the layout of the magnetic system, multiple series and parallel separation spaces can be constructed to increase the adaptability of the magnetic separator; the magnetic field area through which the sorted materials flow increases in the vertical direction, and the The sorting ability is improved accordingly; at the same time, the background field strength provided by each piece of connected permanent magnet steel is also different, which changes in steps in the vertical direction, and the magnetic materials of different strengths and weaknesses are correspondingly sorted. The whole set of magnetic system is arranged in the sorting chamber 13, the magnetic circuit is designed compactly, and the inner wall of the sorting chamber 13 can shield the lines of magnetic force to reduce the loss of magnetic flux.

The arrangement of the permanent magnet magnetic system of the present invention is a modular design, and the number of magnetic steels can be adjusted according to the sorting index to determine the number of magnetic separation space groups. As shown in FIG. 4B , it is a series design diagram of a permanent magnet magnetic system, and a magnetic pole system in which n _{1 pairs} of magnetic poles can be connected in series can form n ₁ working areas. At this moment, both sides of the permanent magnetic steel 10 are fixed with a high magnetic permeability magnetic gathering plate 9, and a magnetic field source is provided at the same time; its corresponding polarity is corresponding to another group of magnetic steel, and multiple groups of closed sorting spaces are provided. The middle folder is sorted with a magnetic accumulation media box. When designing in series, the sorting chamber 13 can be designed according to the number of magnetic separation space groups, and the outer surfaces of the first and last two sets of magnets are fixed at a certain distance from the inner wall of the sorting chamber 13 .

As shown in Figures 5A, 5B, and 5C, they are two-stage parallel design drawings of the permanent magnet magnetic system. Two sets of permanent magnets 10 can be arranged in the vertical direction and combined with N-S-N-S polarity. The inner surfaces of the permanent magnets 10 arranged up and down provide different background field strengths, and there are stepwise field strengths along the vertical direction. The distribution can be sorted according to the magnetic strength of the sorted materials in turn, so that the sorting efficiency is improved; at the same time, the magnetic gathering medium box 21 can be properly adjusted according to the height of the magnetic steel parallel connection.

As shown in FIG. 6B , the multi-stage series magnetic circuit shown in FIG. 4B can be connected in parallel with n ₃ magnetic poles to form a parallel series permanent magnet magnetic circuit composed of n ₂ *n ₃ magnetic poles. During the series-parallel connection process, the volume of the sorting chamber can be specifically determined according to the number of magnetic poles.

The permanent magnet vibration modular magnetic separator of the present invention realizes the continuous operation process is simple, and the specific steps are as follows:

(1) Turn on the power supply on the control cabinet and check whether the switch is normal; determine the styles to be selected at different granularity levels, and prepare for the sorting test.

(2) Turn on the power to make the three-phase asynchronous motor 19 of the vibration source stabilize at a certain low frequency, and slowly and evenly feed a certain granularity from the feeding funnel 11 (self-weight feeding), so that the material flows through at a low speed And through the magnetic accumulation medium box 21 in the separation chamber 13, in the strong magnetic field separation space, the magnetic material is adsorbed on the magnetic accumulation medium in the magnetic accumulation medium box 21, and the non-magnetic material passes through the magnetic separation space, and through the composite force (Self gravity and vibration force) are discharged into the designated material receiving container through the discharge port 20; when the feeding is finished, keep the motor 19 working at the same vibration frequency for about 1 minute, and when the discharged material is almost zero (indicating non-magnetic materials and magnetic materials) The material has been separated), and the material receiver is moved out of the working area, so as to obtain the non-magnetic material of the test particle size.

(3) Open the motor control button, the power source provided will move the permanent magnetic steel 10 out of the working area, increase the vibration frequency of the vibration motor 19 and stabilize it for a period of time, and the magnetic material will start to move in the non-magnetic area under the strong vibration of the vibration source. It falls off from the magnetic gathering medium, and is discharged through the discharge port 20 into the designated receiving container through the composite force (self-gravity and vibration force); thereby obtaining the magnetic material with the particle size for the test.

(4) Reduce the frequency of the motor to the initial value and move the permanent magnetic steel 10 back to the original position through the horizontal hydraulic cylinder 15, and perform multiple selections on the magnetic materials obtained by one sorting, which can improve the taste of the concentrate.

The assembly of the permanent magnet vibration modular magnetic separator of the present invention can only be realized by adopting a reasonable assembly process.

The permanent magnetic vibration modular magnetic separator of the present invention has the advantages of reliable process, simple equipment, high degree of automation and strong applicability for fine-grained materials, especially coal-fired desulfurization and non-metallic ore removal of iron and impurities. It is a modular design and is equipped with a corresponding hydraulic system, which has certain industrial application prospects.

Claims (6)

1. a kind of permanent magnetic vibration modular magnetic separator, it is characterized in that: described magnetic separator comprises frame (2), is installed in the sorting device above frame (2) by vibrating mechanism, described sorting device It includes a sorting chamber (13), a feed port (11) at the top of the sorting chamber, a discharge port (20) at the top and bottom of the sorting chamber, and a coaxial arrangement with the sorting chamber in the sorting chamber And extend vertically downwards to at least one magnetism-gathering medium box (21) at the discharge port, a pair of permanent magnets that can be used for relative horizontal displacement of the coaxial line are respectively arranged on both sides of the magnetism-gathering medium box (21) Magnetic steel (10). 2. The permanent magnet vibrating modular magnetic separator according to claim 1, characterized in that: the vibrating mechanism comprises an elastic support driven by a vibrating source installed above the frame (2) middle support body, with The center of the horizontal arrangement combined with the elastic support is a vibrating steel plate (5) with a hollow structure. It is firmly connected with the vibrating steel plate (5). 3. The permanent magnetic vibration modular magnetic separator according to claim 1, characterized in that: said two pairs of permanent magnetic steels (10) that can perform relative horizontal displacement movements are respectively connected to the frame (2) frame The piston rod end of the horizontal hydraulic cylinder on the corresponding side above is combined. 4. The permanent magnetic vibration modular magnetic separator according to claim 1 or 3, characterized in that: the permanent magnetic steel (10) is a rectangular cube structure with the same specifications, and its material adopts the permanent magnet of high performance NdFeB. The magnetic steel is used as a strong magnetic force source, and every two pairs of permanent magnetic steel are arranged in the sorting chamber in an arrangement with opposite polarity relative to the inner surface of the magnetic accumulation medium box (21), forming a counter-pole magnetic separation space; And the outer surface of each permanent magnet is designed with a series magnetic system, that is, the inner and outer surfaces of each permanent magnet can provide a magnetic source at the same time; at the same time, the multi-group separation space constructed according to this arrangement, the polarity distribution Arranged as N-S-N-S. 5. The permanent magnetic vibration modular magnetic separator according to claim 4, characterized in that: the permanent magnetic steel (10) is assembled according to the polarity requirements, that is, the surface on one side of each permanent magnetic steel is Be fixed on the high magnetic permeability gathering plate (9), the height of the high magnetic permeability gathering plate (9) is slightly less than the height of the permanent magnet steel (10), so that the permanent magnet steel (10) has a field strength from the upper end to the lower end It presents a step change, and provides a magnetic field source N pole on the inner surface of the permanent magnet steel (10) along the radial direction of magnetization, and the magnetic field source S provided by the inner surface of another permanent magnet steel oppositely arranged. The poles form a closed loop to provide sorting space. 6. The permanent magnet vibration modular magnetic separator according to claim 1, characterized in that: the magnetic gathering medium box (21) is made of nonmagnetic stainless steel material, and the magnetic gathering medium box is in the sorting chamber The height of each permanent magnet should be equal to the height of the high-field surface provided by each permanent magnet, and its width should be smaller than the distance between the corresponding surfaces of two pairs of permanent magnets, and it should be arranged in the center.

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