Structure for preventing radial deformation and fatigue fracture of magnetic drum of magnetic separator

Abstract

The application discloses a structure for preventing radial deformation and fatigue fracture of a magnetic drum of a magnetic separator, and relates to the technical field of ore dressing and magnetic separation equipment. The structure for preventing radial deformation and fatigue fracture of the magnetic drum of the magnetic separator comprises a drum body and a slurry tank, the lower part of the drum body is arranged in the slurry tank, a permanent magnet system assembly is arranged in the drum body, left and right flanges are respectively connected to the left and right ends of the drum body, a core shaft penetrates the center of the drum body, and a reinforcing hoop plate is welded to the outer wall of the drum body. The structure for preventing radial deformation and fatigue fracture of the magnetic drum of the magnetic separator is welded with the reinforcing hoop plate at equal distances on the surface of the drum body, the reinforcing hoop plate increases the radial rigidity of the drum body, the damage of the magnetic separator caused by the radial deformation and fatigue fracture of the drum body is solved, and the product quality is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of magnetic separation equipment, in particular to a structure for preventing radial deformation and fatigue fracture of a magnetic drum of a magnetic separator. BACKGROUND

[0002] The permanent-magnetic drum magnetic separator is the most widely used type of magnetic separator. The magnetic separator mainly comprises a transmission mechanism, an angle-adjustable sector permanent magnetic system, and a rotatable drum. The permanent-magnetic system capable of adjusting the rotation angle is arranged inside the rotatable drum to form a magnetic drum.

[0003] In the separation process, the magnetic drum is half-submerged in a tank of ore slurry to be separated. The magnetic material (iron concentrate) in the tank is adsorbed on the outer surface of the rotatable drum. The separation is achieved when the drum rotates out of the magnetic zone of the tank. The iron concentrate is separated from the magnetic drum by washing the drum with clean water (the outer surface of the drum is in a non-magnetic zone in the washing zone).

[0004] With the increase of the annual output of the ore dressing plant, large magnetic drums have been developed. The length of the magnetic drum has increased from 2960 mm to 5940 mm, the diameter has increased from 1042 mm to 1480 mm, and the wall thickness has increased from 4 mm to 8 mm. The magnetic field strength has increased from 180 mT to 600 mT. The material of the magnetic drum has not changed, which is 06Cr19Ni10. SUMMARY

[0005] The present application aims to provide a structure for preventing radial deformation and fatigue fracture of a magnetic drum of a magnetic separator. The equal-distance welding of the hoop plate on the surface of the drum body increases the radial stiffness of the drum body, solves the damage caused by the radial deformation and fatigue fracture of the drum body to the magnetic separator, and improves the product quality, thereby solving the problems in the background art.

[0006] In order to achieve the above object, the present application provides the following technical scheme: a structure for preventing radial deformation and fatigue fracture of a magnetic drum of a magnetic separator, comprising a drum body and a slurry tank, the lower part of the drum body being placed in the slurry tank, a permanent magnet system assembly being arranged in the drum body, left and right flanges being respectively connected to the left and right ends of the drum body, a mandrel being penetrated through the center of the drum body, and a reinforcing hoop plate being welded on the outer wall of the drum body.

[0007] The permanent magnet system assembly comprises a bearing seat, a support frame, a magnetic yoke plate and a permanent magnet, the bearing seat being movably connected with the mandrel, the magnetic yoke plate being connected with the support frame on one side of the bearing seat, and the permanent magnet being arranged on the side of the magnetic yoke plate away from the support frame.

[0008] Preferably, the outer diameter of the reinforcing hoop plate is smaller than the outer diameter of the left and right flanges, the reinforcing hoop plate is made of 06Cr19Ni10 material, and the cross-sectional dimension of the reinforcing hoop plate is b x h=(10-16) x (12-25), wherein b is the width of the reinforcing hoop plate, i.e. the vertical distance between the two annular planes on the two sides of the reinforcing hoop plate, and h is the thickness of the reinforcing hoop plate, i.e. the vertical distance from the inner wall curve to the outer wall curve of the reinforcing hoop plate, both in mm.

[0009] Preferably, the reinforcing hoop plate is provided with three or four reinforcing hoop plates, and the reinforcing hoop plates are equidistantly arranged on the outer surface of the drum body along the axial direction of the drum body.

[0010] Preferably, the reinforcing hoop plate is connected to the middle position of the outer surface of the drum body, reinforcing side plates vertically connected to the reinforcing hoop plate are equidistantly welded on the outer surface of the drum body, and the thickness of the reinforcing side plate near the reinforcing hoop plate is greater than the thickness of the reinforcing side plate at the two ends.

[0011] Preferably, the reinforcing hoop plate is provided with two reinforcing hoop plates along the axial direction of the drum body, and the reinforcing hoop plates are symmetrically arranged about the center line of the drum body, and a helical protruding strip is arranged on the side of the reinforcing hoop plate away from the other reinforcing hoop plate.

[0012] Preferably, one end of the helical protruding strip is welded to the reinforcing hoop plate, the helical protruding strip is made of 06Cr19Ni10 material, and the helical protruding strips are equidistantly arranged.

[0013] Preferably, three holes are arranged on the side of the reinforcing hoop plate near the connection position of the helical protruding strip, and the three holes are arranged on the acute angle side formed by the helical protruding strip and the reinforcing hoop plate.

[0014] Preferably, the reinforcing hoop plates are provided in two along the axial direction of the drum body, and the reinforcing hoop plates are symmetrically provided about the center line of the drum body, the adjacent sides of the reinforcing hoop plates are staggered to provide traction rods, the ends of the traction rods away from the reinforcing hoop plates are fixedly connected with limiting plates, the ends of the traction rods close to the limiting plates are sleeved with supporting springs, and one end of the supporting spring is fixedly connected with the limiting plate.

[0015] Preferably, the outer surface of the drum body is staggered to provide positioning balls, the centers of the positioning balls are provided with through holes, the through holes are movably connected with the traction rods, and the other end of the supporting spring is fixedly connected with the positioning ball.

[0016] Preferably, the limiting plate is provided with an arc-shaped push plate, the arc of the arc-shaped push plate is matched with the drum body, the inner wall of the arc-shaped push plate is in contact with the drum body, and the arc-shaped push plate is made of 06Cr19Ni10 material.

[0017] Compared with the prior art, the present application has the following beneficial effects:

[0018] 1. The reinforcing hoop plates are welded on the surface of the drum body at equal distances, the reinforcing hoop plates increase the radial rigidity of the drum body, solve the damage caused by the radial deformation and fatigue fracture of the drum body to the magnetic separator, and improve the product quality.

[0019] 2. The reinforcing hoop plates are provided at the position of the largest deformation of the drum body, and the reinforcing side plates are connected to the reinforcing hoop plates, which also achieve the goal of increasing the radial rigidity of the drum body, and the reinforcing side plates also play a stirring role on the materials in the ore pulp tank, which can improve the adsorption effect.

[0020] 3. The reinforcing hoop plates are provided with spiral protruding strips on one side, the spiral protruding strips increase the wall thickness of the drum body, when the drum body is deformed due to the pressure generated by the magnetic adsorption of the magnetic iron ore powder, the deformation direction is perpendicular to the axial direction of the drum body and intersects with the spiral protruding strips, the spiral protruding strips can resist the increase of deformation, thereby improving the radial rigidity of the drum body, the spiral protruding strips play a guiding role, the washing water can be guided by the spiral protruding strips to the space between the reinforcing hoop plates, which is convenient for collecting the washing water and the magnetic iron ore powder.

[0021] 4. The adjacent sides of the reinforcing hoop plates are staggered to provide traction rods, the traction rods are used in cooperation with the positioning balls, the adjacent traction rods restrict each other, overcome the deformation of the drum body, improve the radial rigidity of the drum body, the traction rods are telescoped in the positioning balls, drive the arc-shaped push plate to move the magnetic iron ore powder adsorbed on the outer surface of the drum body to the two ends of the drum body, reduce the magnetic iron ore powder on the middle position of the outer surface of the drum body, thereby reducing the pressure of the magnetic iron ore powder on the middle position of the drum body, and prolonging the service life of the drum body. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Figure of the structure after the deformation of the drum body in the prior art;

[0023] Figure 2 Figure of the working state after the deformation of the drum body in the prior art;

[0024] Figure 3 Figure of the installation of the drum body of the present application;

[0025] Figure 4 Figure of the internal structure of the drum body of the present application;

[0026] Figure 5 Figure of the working state of the drum body of the present application;

[0027] Figure 6 Figure of the structure of the drum body of the first embodiment of the present application;

[0028] Figure 7 Figure of the structure of the drum body of the second embodiment of the present application;

[0029] Figure 8 Figure of the structure of the drum body of the third embodiment of the present application;

[0030] Figure 9 Figure of the structure of the drum body of the fourth embodiment of the present application;

[0031] Figure 10 Figure of the enlarged view of A of the present application

[0032] Figure 11 Figure of the structure of the drum body of the fifth embodiment of the present application.

[0033] In the figure: 1, drum body; 11, left flange; 12, right flange; 13, mandrel; 14, positioning ball; 2, permanent magnet assembly; 21, bearing seat; 22, support frame; 23, magnetic yoke plate; 24, permanent magnet; 3, ore pulp tank; 4, reinforcing hoop plate; 41, reinforcing side plate; 42, spiral protruding strip; 43, three-hole; 44, traction rod; 441, limiting plate; 442, supporting spring; 443, arc-shaped push plate. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0035] Embodiment one:

[0036] Please refer to Figures 1-6The application discloses a structure for preventing radial deformation and fatigue fracture of a magnetic drum of a magnetic separator, which comprises a drum body 1 and a slurry tank 3, the lower part of the drum body 1 is arranged in the slurry tank 3, a permanent magnetic system assembly 2 is arranged in the drum body 1, left and right flanges 11 and 12 are respectively connected to the left and right ends of the drum body 1, a core shaft 13 penetrates through the center of the drum body 1, and reinforcing hoop plates 4 are welded on the outer wall of the drum body 1.

[0037] The permanent magnetic system assembly 2 comprises a bearing seat 21, a support frame 22, a magnetic yoke plate 23 and permanent magnets 24, the bearing seat 21 is movably connected with the core shaft 13, the magnetic yoke plate 23 is connected with the support frame 22 on one side of the bearing seat 21, and the permanent magnets 24 are arranged on the side, away from the support frame 22, of the magnetic yoke plate 23.

[0038] The outer diameter of the reinforcing hoop plate 4 is smaller than the outer diameter of the left and right flanges 11 and 12, the reinforcing hoop plate 4 is made of 06Cr19Ni10 material, and the sectional dimension of the reinforcing hoop plate 4 is b x h=(10-16) x (12-25), wherein b is the width of the reinforcing hoop plate 4, that is, the vertical distance between the two annular planes on the two sides of the reinforcing hoop plate 4, h is the thickness of the reinforcing hoop plate 4, that is, the vertical distance from the inner wall curve to the outer wall curve of the reinforcing hoop plate 4, and the units are mm.

[0039] The reinforcing hoop plate 4 is provided with three or four reinforcing hoop plates 4, and the reinforcing hoop plates 4 are equidistantly arranged on the outer surface of the drum body 1 along the axial direction of the drum body 1.

[0040] Working process: three reinforcing hoop plates 4 are welded on the outer surface of the drum body 1, the drum body 1 is half-submerged in the slurry tank 3 to be selected, one end of the core shaft 13 is connected with a driving device such as a motor, the position of the permanent magnet 24 is adjusted, the driving device drives the drum body 1 to rotate, the drum body 1 rotates to the position corresponding to the permanent magnet 24, under the action of the permanent magnet 24, the magnetic substances in the slurry tank 3 can be adsorbed on the outer surface of the drum body 1, the separation and separation are realized when the drum body 1 rotates out of the non-magnetic area of the slurry tank 3, the magnetic substances on the drum body 1 are washed with clean water, the separation of the magnetic substances from the drum body 1 is realized, the reinforcing hoop plate 4 increases the radial rigidity of the drum body 1, the drum body 1 is not easy to deform, and the inner wall of the drum body 1 keeps a normal working distance from the permanent magnet 24.

[0041] Embodiment two

[0042] Please refer to Figure 7 The reinforcing hoop plate 4 is connected to the middle position of the outer surface of the drum body 1, reinforcing side plates 41 vertically connected with the reinforcing hoop plate 4 are equidistantly welded on the outer surface of the drum body 1, and the thickness of the reinforcing side plate 41 close to the position of the reinforcing hoop plate 4 is greater than the thickness of the reinforcing side plate 41 at the two ends.

[0043] Specifically, the distance of elastic deformation of the middle position of the outer surface of the drum body 1 is the largest, the reinforcing hoop plate 4 is arranged at the position of the largest deformation of the drum body 1, the radial stiffness of the middle position of the outer surface of the drum body 1 can be improved, the radial stiffness of the two ends of the drum body 1 is increased through the connected reinforcing side plates 41, the two ends of the drum body 1 are connected through the left flange 11 and the right flange 12, and the radial stiffness of the two ends is greater than that of the middle position of the drum body 1, the thickness of the reinforcing side plate 41 gradually decreases from the middle to the two ends, the use of the material of the reinforcing side plate 41 is reduced, and the influence of the reinforcing side plate 41 on the suction of the drum body 1 is reduced, and the thickness of the connection between the reinforcing side plate 41 and the reinforcing hoop plate 4 is the largest, so that higher radial stiffness of the drum body 1 is provided.

[0044] Compared with example one, another embodiment for improving the radial stiffness of the drum body 1 is provided in the embodiment, in which the reinforcing side plate 41 plays a stirring role on the material in the ore pulp tank 3, and the adsorption effect can be improved.

[0045] Example three:

[0046] Please refer to Figure 8 The reinforcing hoop plate 4 is provided with two in the axial direction of the drum body 1, and the reinforcing hoop plate 4 is symmetrically arranged about the center line of the drum body 1, and the side away from the reinforcing hoop plate 4 is provided with a spiral protruding strip 42.

[0047] Specifically, the reinforcing hoop plate 4 is arranged at the position close to the middle of the surface of the drum body 1, so that the radial stiffness of the drum body 1 can be greatly improved, meanwhile, the wall thickness of the drum body 1 is increased by using the spiral protruding strip 42, and the radial stiffness of the drum body 1 is correspondingly improved, and the spiral protruding strip 42 is in a spiral shape, when the drum body 1 is deformed due to the pressure generated by the magnetic adsorption of the magnetic iron ore powder, the deformation direction is perpendicular to the axial direction of the drum body 1 and intersects with the spiral protruding strip 42, the spiral protruding strip 42 can resist the increase of the deformation, so that the radial stiffness of the drum body 1 is improved.

[0048] One end of the spiral protruding strip 42 is welded with the reinforcing hoop plate 4, the spiral protruding strip 42 is made of 06Cr19Ni10 material, and the spiral protruding strips 42 are arranged at equal distances.

[0049] Specifically, the spiral protruding strip 42 is provided with two groups, and the two groups of spiral protruding strips 42 are symmetrically arranged, in actual operation, when the drum body 1 with the adsorbed magnetic iron ore powder rotates away from the permanent magnet 24, the surface of the drum body 1 is washed, the washing water can be guided by the spiral protruding strip 42 and collected between the reinforcing hoop plates 4, so that the washing water and the magnetic iron ore powder are conveniently collected.

[0050] The reinforcing hoop plate 4 is provided with three holes 43 on the side close to the connection position of the spiral protruding strip 42, and the three holes 43 are arranged on the acute angle side formed by the spiral protruding strip 42 and the reinforcing hoop plate 4.

[0051] Specifically, the three holes 43 are continuous and equal-sized circular holes connected together, and the three holes 43 are arranged for water drainage when the magnetic iron ore powder on the surface of the drum body 1 is washed. The three holes 43 are continuous three-arch structures, which mainly bear the axial pressure and are balanced by the thrust at both ends. In the case of not affecting or reducing the influence of the reinforcing hoop plate 4, the washing water can be conveniently discharged.

[0052] Compared with the first embodiment, the spiral protruding strip 42 is arranged in the embodiment to improve the radial rigidity of the drum body 1, and the spiral protruding strip 42 also plays a guiding role. The washing water can be guided by the spiral protruding strip 42 and collected between the reinforcing hoop plates 4, so as to facilitate the collection of the washing water and the magnetic iron ore powder.

[0053] Embodiment four:

[0054] Please refer to Figures 9-10 The reinforcing hoop plate 4 is arranged along the axial direction of the drum body 1, and the reinforcing hoop plate 4 is symmetrically arranged about the center line of the drum body 1. The side of the adjacent reinforcing hoop plate 4 is arranged with a traction rod 44, and the end of the traction rod 44 away from the reinforcing hoop plate 4 is fixedly connected with a limiting plate 441. The end of the traction rod 44 close to the limiting plate 441 is sleeved with a supporting spring 442, and one end of the supporting spring 442 is fixedly connected with the limiting plate 441.

[0055] The outer surface of the drum body 1 is arranged with a positioning ball 14, and a through hole is arranged in the center of the positioning ball 14. The through hole is movably connected with the traction rod 44, and the other end of the supporting spring 442 is fixedly connected with the positioning ball 14.

[0056] Specifically, the traction rod 44, the positioning ball 14 and the support spring 442 are made of 06Cr19Ni10 material, the reinforcing hoop plate 4 increases the radial stiffness of the drum body 1, after the drum body 1 surface appears concave due to excessive magnetic iron ore powder adsorbed on the outer surface of the drum body 1 and pressure deformation, the distance between the positioning ball 14 and the reinforcing hoop plate 4 connected with the traction rod 44 is shortened, the support spring 442 is stretched, the elasticity of the support spring 442 itself pulls the drum body 1 back to the original position, and at the same time, the positions of the two adjacent positioning balls 14 on both sides of the support spring 442 in the stretched state appear concave, and correspondingly, the support spring 442 connected with the positioning ball 14 at the concave position is extruded, driving the positioning ball 14 at the concave position to return to the original position. The working directions of the support spring 442 in the stretched state and the two adjacent support springs 442 on both sides are opposite, overcoming the deformation of the drum body 1. In addition, the traction rod 44 and the positioning ball 14 protrude from the surface of the drum body 1, and when the drum body 1 rotates, the traction rod 44 and the positioning ball 14 can be rolled in the ore tank 3, playing a stirring role and increasing the magnetic effect.

[0057] Compared with example one, in this embodiment, the movable traction rod 44 is used to increase the radial stiffness of the drum body 1, and the reverse work of the misaligned traction rod 44 is used to restrict each other and reduce the deformation.

[0058] Example five:

[0059] Please refer to Figure 11 The limiting plate 441 is provided with an arc-shaped push plate 443, the arc of the arc-shaped push plate 443 matches the drum body 1, the inner wall of the arc-shaped push plate 443 is in contact with the drum body 1, and the arc-shaped push plate 443 is made of 06Cr19Ni10 material.

[0060] Specifically, after the drum body 1 surface appears concave due to excessive magnetic iron ore powder adsorbed on the outer surface of the drum body 1 and pressure deformation, the distance between the positioning ball 14 and the reinforcing hoop plate 4 connected with the traction rod 44 is shortened, the traction rod 44 is stretched in the positioning ball 14, the support spring 442 is stretched, the position of the traction rod 44 relative to the drum body 1 changes, driving the arc-shaped push plate 443 to push the magnetic iron ore powder adsorbed on the outer surface of the drum body 1 to move to the positions of both ends of the drum body 1, reducing the magnetic iron ore powder on the middle position of the outer surface of the drum body 1, thereby reducing the pressure on the middle position of the drum body 1 generated by the magnetic iron ore powder, reducing the pressure deformation of the drum body 1 due to excessive magnetic iron ore powder adsorbed on the outer surface of the drum body 1, the drum body 1 is provided with the reinforcing hoop plate 4 at the end, the radial stiffness of the both ends of the drum body 1 is greater than that of the middle position of the drum body 1, the deformation amount is small, and the service life of the drum body 1 is prolonged.

[0061] Compared with example four, the structure of the arc-shaped push plate 443 is added in the embodiment, cooperates with the work of the traction rod 44, can push the magnetic material adsorbed on the surface of the drum body 1, changes the adsorption position of the magnetic material, thereby changes the position of the pressure generated by the magnetic material on the drum body 1, and reduces the deformation of the drum body 1.

[0062] In summary: the structure for preventing the radial deformation and fatigue fracture of the magnetic drum of the magnetic separator is proposed in the application, the reinforcing hoop plates 4 are welded on the surface of the drum body 1 at equal distances, the reinforcing hoop plates 4 increase the radial rigidity of the drum body 1, solve the damage caused by the radial deformation and fatigue fracture of the drum body 1 to the magnetic separator, and improve the product quality; the reinforcing hoop plates 4 are arranged at the position of the maximum deformation of the drum body 1, and the reinforcing side plates 41 are connected to the reinforcing hoop plates 4, which also achieve the target of increasing the radial rigidity of the drum body 1, and the reinforcing side plates 41 can stir the materials in the ore pulp tank 3, thereby improving the adsorption effect; the spiral protruding strips 42 are arranged on one side of the reinforcing hoop plates 4, the spiral protruding strips 42 increase the wall thickness of the drum body 1, when the drum body 1 is deformed due to the magnetic adsorption of the magnetic iron ore powder, the deformation direction is perpendicular to the axial direction of the drum body 1 and intersects with the spiral protruding strips 42, the spiral protruding strips 42 can resist the increase of the deformation, thereby improving the radial rigidity of the drum body 1, the spiral protruding strips 42 can guide the washing water to flow to the reinforcing hoop plates 4, and the washing water and the magnetic iron ore powder can be collected conveniently; the traction rods 44 are arranged on the opposite sides of the adjacent reinforcing hoop plates 4, the traction rods 44 are used in cooperation with the positioning balls 14, the adjacent traction rods 44 restrict each other, overcome the deformation of the drum body 1, improve the radial rigidity of the drum body 1, the traction rods 44 are telescoped in the positioning balls 14, drive the arc-shaped push plates 443 to push the magnetic iron ore powder adsorbed on the outer surface of the drum body 1 to move to the two ends of the drum body 1, reduce the magnetic iron ore powder on the middle position of the outer surface of the drum body 1, thereby reducing the pressure generated by the magnetic iron ore powder on the middle position of the drum body 1, and prolonging the service life of the drum body 1.

[0063] The above merely describes the preferred embodiments of the application, but the protection scope of the application is not limited to this, any person skilled in the art can make equivalent replacements or changes according to the technical scheme and the inventive concept of the application within the technical range disclosed by the application, which should be covered in the protection scope of the application.

Claims

1. A structure for preventing radial deformation and fatigue fracture of a magnetic drum of a magnetic separator, comprising a drum body (1) and a slurry tank (3), characterized in that: The lower part of the drum body (1) is placed in the ore pulp tank (3), the drum body (1) is provided with a permanent magnet magnetic system assembly (2), the left and right ends of the drum body (1) are respectively connected with the left flange (11) and the right flange (12), the center of the drum body (1) penetrates the mandrel (13), and the outer wall of the drum body (1) is welded with the reinforcing hoop plate (4); the permanent magnet magnetic system assembly (2) comprises a bearing seat (21), a support frame (22), a magnetic yoke plate (23) and a permanent magnet (24), the bearing seat (21) is movably connected with the mandrel (13), one side of the bearing seat (21) is connected with the magnetic yoke plate (23) through the support frame (22), and the side, away from the support frame (22), of the magnetic yoke plate (23) is provided with the permanent magnet (24); The reinforcing hoop plate (4) is provided with two in the axial direction of the drum body (1), and the reinforcing hoop plate (4) is symmetrically arranged about the center line of the drum body (1), and the side, adjacent to the reinforcing hoop plate (4), is arranged with the traction rod (44) in a staggered manner, one end, away from the reinforcing hoop plate (4), of the traction rod (44) is fixedly connected with the limiting plate (441), one end, close to the limiting plate (441), of the traction rod (44) is sleeved with the supporting spring (442), and one end of the supporting spring (442) is fixedly connected with the limiting plate (441). The outer surface of the drum body (1) is arranged with the positioning ball (14) in a staggered manner, the center of the positioning ball (14) is provided with a through hole, the through hole is movably connected with the traction rod (44), and the other end of the supporting spring (442) is fixedly connected with the positioning ball (14).

2. The structure for preventing the radial deformation and fatigue fracture of the magnetic drum of a magnetic separator according to claim 1, characterized in that: The outer diameter of the reinforcing hoop plate (4) is lower than that of the left flange (11) and the right flange (12), the reinforcing hoop plate (4) is made of 06Cr19Ni10 material, and the cross-sectional dimension of the reinforcing hoop plate (4) is b×h=(10-16)×(12-25), wherein b is the width of the reinforcing hoop plate (4), that is, the vertical distance between the two side annular planes of the reinforcing hoop plate (4), h is the thickness of the reinforcing hoop plate (4), that is, the vertical distance from the inner wall curve of the reinforcing hoop plate (4) to the outer wall curve, and the units are mm.

3. The structure for preventing the radial deformation and fatigue fracture of the magnetic drum of a magnetic separator according to claim 1, characterized in that: The limiting plate (441) is provided with an arc-shaped push plate (443), the arc of the arc-shaped push plate (443) matches the drum body (1), the inner wall of the arc-shaped push plate (443) is in contact with the drum body (1), and the arc-shaped push plate (443) is made of 06Cr19Ni10 material.

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