Ferrite magnetic steel grinding ball mill

Abstract

The application relates to a ball mill for grinding ferrite magnetic steel and belongs to the technical field of magnetic steel processing equipment, which comprises a rack and a ball mill tank arranged on the rack, the ball mill tank is used for grinding materials, a screening device is arranged on the rack, and the screening device is used for screening the material particles ground in the ball mill tank. Through the screening of the screen, the materials meeting the particle size requirement can pass through the screen into the discharge pipe and be discharged, and the materials not meeting the particle size requirement are blocked in the screen cylinder by the screen, so that the screening of the ground materials is realized, the uniformity of the particle size of the discharged materials is effectively improved, and the problem that the particle size is uneven due to excessive grinding or insufficient grinding of part of the materials in the traditional ball mill is avoided.

Description

Technical Field

[0001] This application relates to the technical field of magnetic steel processing equipment, and in particular to a ball mill for grinding ferrite magnets. Background Technology

[0002] Ferrite magnets possess advantages such as high magnetic permeability, excellent magnetic properties, and low cost, making them widely used in various fields including electronics, motors, and communications. Grinding is a crucial step in the production and processing of ferrite magnets. Its purpose is to process the raw or semi-finished ferrite magnets into products with specific particle size and surface quality to meet the requirements of subsequent production processes. Currently, the equipment used for grinding ferrite magnets is mainly the traditional ball mill. A traditional ball mill typically includes a cylinder, end caps at both ends of the cylinder, a drive unit to rotate the cylinder, and a support unit to support the cylinder. During the grinding process, the ferrite magnet material and grinding media (such as steel balls, ceramic balls, etc.) are placed inside the cylinder. The drive unit rotates the cylinder, causing the material and grinding media to impact, grind, and collide within the cylinder, thus achieving the grinding of the material.

[0003] However, due to the uneven distribution of materials inside the cylinder and the different contact probabilities between the grinding media and the materials, some materials are easily over-ground while others are under-ground, resulting in uneven particle size distribution of the ground ferrite magnets and affecting product quality. Utility Model Content

[0004] To improve the particle size uniformity during the grinding of ferrite magnets, this application provides a ball mill for grinding ferrite magnets.

[0005] This application provides a ball mill for grinding ferrite magnets, which adopts the following technical solution: A ball mill for grinding ferrite magnets includes a frame and a grinding jar mounted on the frame. The grinding jar is used for grinding materials. A screening device is provided on the frame for screening the particles of the ground material in the grinding jar. The screening device includes: A sieve cylinder is rotatably mounted on a frame and connected to a ball mill jar, and the sieve cylinder rotates synchronously with the ball mill jar; The guide tube is mounted on the frame and located between the sieve cylinder and the ball mill jar. The guide tube is connected to the interior of both the sieve cylinder and the ball mill jar, and is rotatably sealed to both the sieve cylinder and the ball mill jar. The ground material in the ball mill jar enters the sieve cylinder through the guide tube. The discharge pipe is mounted on the frame, with one end extending into the screen cylinder. The connection between the discharge pipe and the screen cylinder is rotatably sealed. A plurality of guide plates are provided, which are evenly distributed on the inner side wall of the screen cylinder. The guide plates are inclined. The material entering the screen cylinder rotates with the screen cylinder under the action of the guide plates and moves to the discharge pipe under the guidance of the guide plates. A screen is installed at one end of the discharge pipe located inside the screen cylinder, and the screen is used to screen the material entering the discharge pipe.

[0006] By adopting the above technical solution, after the ball mill jar grinds the material, the material enters the screen cylinder through the guide tube. Since the screen cylinder rotates synchronously with the ball mill jar, the rotation of the screen cylinder drives the guide plates on the inner wall to rotate as well. The inclined guide plates can receive and move the material. After the guide plates rotate above the screen, the material on the guide plates gradually moves towards the discharge pipe under the guidance of the guide plates. When the material reaches the discharge pipe, it will first be screened by the screen. Material that meets the particle size requirements can pass through the screen and enter the discharge pipe for discharge, while material that does not meet the particle size requirements is blocked by the screen inside the screen cylinder. This achieves the screening of the ground material, effectively improving the uniformity of the discharged material particle size and avoiding the problem of uneven particle size caused by over-grinding or insufficient grinding of some materials in traditional ball mills. At the same time, the rotating sealing connection between the guide tube and the screen cylinder, the ball mill jar, and the discharge pipe and the screen cylinder can prevent material leakage from the connection points during transmission and screening, ensuring the airtightness of the equipment operation.

[0007] Optionally, the discharge pipe is equipped with a vibration mechanism, which drives the screen to vibrate. The vibration mechanism includes: Mounting bracket, which is fixedly mounted on the outer wall of the discharge pipe; A vibration motor, which is fixedly mounted on a mounting bracket; A vibrating rod, one end of which is fixedly connected to the output end of a vibrating motor, and the other end of which extends into the discharge pipe and is fixedly connected to a screen. An elastic element is sleeved on the part of the vibrating rod located inside the discharge pipe. One end of the elastic element abuts against the inner wall of the discharge pipe, and the other end of the elastic element abuts against the screen.

[0008] By adopting the above technical solution, during the screening process, the vibration motor is started, which drives the vibrating rod to vibrate, and the vibrating rod in turn drives the screen that is fixedly connected to it to vibrate. The vibration of the screen can effectively prevent materials that meet the particle size requirements from clogging the screen mesh, improve the material throughput, and ensure the smooth progress of the screening work. At the same time, the elastic element sleeved on the vibrating rod can play a buffering role when the screen vibrates, reducing the impact of the screen vibration on the discharge pipe, reducing the noise of the equipment during operation, and can also limit the vibration amplitude of the screen to a certain extent, avoiding damage to the screen due to excessive vibration amplitude and extending the service life of the screen. The mounting bracket provides a stable installation position for the vibration motor, ensuring that the vibration motor can work stably.

[0009] Optionally, the inner wall of the sieve cylinder is provided with a plurality of grinding protrusions, which are evenly distributed on the inner wall of the sieve cylinder and have a triangular cross-section.

[0010] By adopting the above technical solution, when the material enters the screen cylinder and rotates with it, it collides and rubs against the grinding protrusions on the inner wall of the screen cylinder. The triangular-shaped grinding protrusions have sharp edges, which can further grind the material. Especially for materials that were not sufficiently ground in the ball mill and have a slightly larger particle size, the grinding protrusions can perform secondary grinding, making the particle size more uniform and further improving the grinding quality. The evenly distributed arrangement of several grinding protrusions ensures that the material can fully contact the grinding protrusions at all positions within the screen cylinder, ensuring a uniform and consistent secondary grinding effect and avoiding situations where some materials are not properly ground.

[0011] Optionally, the frame is provided with a recycling mechanism for recycling non-conforming materials screened out by the screen. The recycling mechanism includes: The recycling cover has a recycling hole on the outer wall of the screen cylinder that communicates with the interior. The recycling cover is rotatably mounted on the screen cylinder and is used to open and close the recycling hole. A limiting component is disposed on the screen cylinder and is used to limit the position of the recycling cover when the recycling hole is closed. A recycling hopper is mounted on the frame and located below the screen cylinder. The opening of the recycling hopper faces the bottom of the screen cylinder. The recycling hopper is used to collect non-conforming materials that fall out of the recycling hole. A collection box is placed at the bottom of the recycling hopper, and the top of the collection box is open.

[0012] By adopting the above technical solution, when a certain amount of defective material blocked by the screen accumulates in the screen cylinder, the recovery cover can be opened. The defective material will fall from the recovery hole under the centrifugal force of the rotating screen cylinder and its own gravity. The recovery hopper, located below the screen cylinder and opening towards the bottom of the screen cylinder, can promptly catch the falling defective material and guide it into the collection box placed at the bottom of the recovery hopper, achieving centralized recovery of defective material. After recovery, the recovery cover is closed, and its position is fixed by a limiting component to prevent the recovery cover from opening on its own during normal equipment operation and causing material leakage. The collection box is designed with an open state, making it convenient for workers to periodically remove the collection box from the bottom of the recovery hopper for processing of defective material, such as re-grinding it in the ball mill jar, improving material utilization and reducing production costs.

[0013] Optionally, the limiting component includes: A limiting frame is provided on the screen cylinder and located at the recycling hole of the screen cylinder. A limiting groove is provided on the limiting frame. When the recycling cover closes the recycling hole, the recycling cover is engaged in the limiting groove. A limiting bolt, which passes through the recycling cover and is threadedly connected to the limiting frame.

[0014] By adopting the above technical solution, when the recycling cover needs to be closed, it is snapped into the limiting groove of the limiting frame. The limiting groove positions the recycling cover, ensuring it accurately covers the recycling hole. Then, the limiting bolt is passed through the recycling cover and threaded into the limiting frame. Tightening the limiting bolt securely fixes the recycling cover to the limiting frame, effectively limiting the closed position of the recycling cover and preventing it from loosening or opening due to centrifugal force during screen cylinder rotation, thus ensuring the equipment's sealing during operation. This limiting method is simple in structure and easy to operate. Operators only need to tighten or loosen the limiting bolt to fix and remove the recycling cover, facilitating the recycling of non-conforming materials.

[0015] Optionally, a drive mechanism is provided on the frame, the drive mechanism being used to drive the ball mill jar and the sieve cylinder to rotate synchronously, the drive mechanism comprising: A drive motor, which is fixedly mounted on the frame; A drive wheel, which is fixedly sleeved on the output shaft of a drive motor; Driven wheel, the driven wheel is fixedly sleeved on the outer wall of the ball mill jar; A drive belt is fitted onto the driving pulley and the driven pulley.

[0016] By adopting the above technical solution, the drive motor is started, and the output shaft of the drive motor drives the driving wheel to rotate. The driving wheel transmits power to the driven wheel through a transmission belt, and the driven wheel in turn drives the ball mill jar, which is fixedly connected to it, to rotate. Since the screen cylinder is connected to the ball mill jar, the rotation of the ball mill jar will drive the screen cylinder to rotate together, thus achieving synchronous rotation of the ball mill jar and the screen cylinder. This drive method, through belt drive, has the advantages of simple structure, low cost, stable operation and low noise. It can ensure that the rotation speed of the ball mill jar and the screen cylinder is consistent during the rotation process, ensuring that the material entering the screen cylinder from the ball mill jar can be stably and effectively screened and secondary ground in the screen cylinder. At the same time, the drive motor is fixedly mounted on the frame, providing stable support for the entire drive mechanism and ensuring that the drive mechanism can operate stably for a long time.

[0017] Optionally, a rubber sealing gasket is provided in the limiting groove of the limiting frame.

[0018] By adopting the above technical solution, when the recycling cover is engaged in the limiting groove, it will make tight contact with the rubber sealing gasket inside the limiting groove. The rubber sealing gasket has good elasticity and sealing performance, which can effectively fill the gap between the recycling cover and the limiting groove, further improving the sealing performance when the recycling cover is closed. This prevents material in the screen cylinder from leaking from the connection between the recycling cover and the limiting frame during rotation, ensuring the sealing performance of the equipment during operation, reducing material waste, and also preventing leaked material from contaminating or damaging other parts of the equipment.

[0019] Optionally, shock-absorbing pads are provided at the four corners of the bottom of the frame.

[0020] By adopting the above technical solution, vibrations are generated during the operation of the equipment due to the rotation of the drive mechanism, grinding jar, and screen cylinder. The vibration-damping pads at the four corners of the frame effectively buffer and absorb these vibrations. These pads reduce the impact of equipment vibration on the ground, lower noise levels during operation, and improve the working environment. Furthermore, they enhance the stability of the equipment during operation, preventing displacement or tipping due to excessive vibration, ensuring safe and stable operation, and extending the equipment's service life.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. Through sieving by the screen, materials that meet the particle size requirements can pass through the screen and enter the discharge pipe and be discharged, while materials that do not meet the particle size requirements are blocked in the screen cylinder by the screen, thereby realizing the screening of the ground materials, effectively improving the uniformity of the particle size of the discharged materials, and avoiding the problem of uneven particle size caused by over-grinding or insufficient grinding of some materials in traditional ball mills. 2. By starting the drive motor, the output shaft of the drive motor drives the drive wheel to rotate. The drive wheel transmits power to the driven wheel through the transmission belt. The driven wheel then drives the ball mill jar, which is fixedly connected to it, to rotate. Since the sieve cylinder is connected to the ball mill jar, the rotation of the ball mill jar will drive the sieve cylinder to rotate together, thus realizing the synchronous rotation of the ball mill jar and the sieve cylinder. 3. Installing shock-absorbing pads can reduce the impact of equipment vibration on the ground, lower noise levels during operation, and improve the working environment. Simultaneously, shock-absorbing pads also enhance the stability of the equipment during operation, preventing displacement or tipping due to excessive vibration, ensuring safe and stable operation, and extending the equipment's service life. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of this application; Figure 2 This is a structural schematic diagram of the drive mechanism and screening device in this application, in which the side wall of the ball mill jar is shown in cross section. Figure 3 This is a structural schematic diagram of the vibration mechanism in this application, in which the side wall of the screen and the side wall of the mounting frame are shown in cross section; Figure 4 yes Figure 2 Enlarged schematic diagram of part A in the middle.

[0023] Reference numerals: 1. Frame; 11. Shock-absorbing foot pad; 12. Grinding jar; 13. Grinding protrusion; 2. Drive mechanism; 21. Drive motor; 22. Drive wheel; 23. Driven wheel; 24. Transmission belt; 3. Screening device; 31. Screen cylinder; 32. Guide tube; 33. Discharge pipe; 34. Guide plate; 35. Screen mesh; 4. Vibration mechanism; 41. Mounting frame; 42. Vibration motor; 43. Vibration rod; 44. Elastic element; 5. Recycling mechanism; 51. Recycling cover; 52. Limiting component; 53. Recycling hopper; 54. Collection box; 55. Limiting frame; 56. Limiting bolt. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1 - Appendix Figure 4 This application will be described in further detail.

[0025] This application discloses a ball mill for grinding ferrite magnets.

[0026] Reference Figure 1The ball mill for grinding ferrite magnets includes a frame 1. Vibration-damping pads 11 are fixedly installed at the four corners of the bottom of the frame 1. The vibration-damping pads 11 are made of rubber and have good elasticity and wear resistance. A grinding jar 12 is rotatably mounted on the frame 1 via bearings. The grinding jar 12 can hold grinding media (such as steel balls or ceramic balls) and is used to grind ferrite magnet materials. A drive mechanism 2 is also provided on the frame 1 to drive the grinding jar 12 to rotate. Simultaneously, a screening device 3 is provided on one side of the frame 1 corresponding to the grinding jar 12, and the screening device 3 is used to screen the ground material particles inside the grinding jar 12.

[0027] Reference Figure 1 and Figure 2 The drive mechanism 2 includes a drive motor 21, a drive pulley 22, a driven pulley 23, and a transmission belt 24. The drive motor 21 is fixedly mounted on one side of the frame 1 by bolts. The drive pulley 22 is fixedly mounted on the output shaft of the drive motor 21 by a flat key. The driven pulley 23 is mounted on the outer wall of the ball mill jar 12 near the drive motor 21, and the diameter of the driven pulley 23 is larger than the diameter of the drive pulley 22 to achieve speed reduction transmission. The transmission belt 24 is a rubber synchronous belt, which is mounted on the drive pulley 22 and the driven pulley 23 to ensure stable power transmission.

[0028] Reference Figure 1 and Figure 2 The screening device 3 includes a screen cylinder 31, a guide tube 32, a discharge pipe 33, a guide plate 34, and a screen 35. The screen cylinder 31 has a cylindrical structure and is rotatably mounted on the frame 1 via bearings, located on the side of the grinding jar 12 furthest from the drive motor 21. The screen cylinder 31 is coaxially arranged with the grinding jar 12, and one end of the screen cylinder 31 closest to the grinding jar 12 is fixedly connected to the grinding jar 12, enabling synchronous rotation between the screen cylinder 31 and the grinding jar 12. The guide tube 32 is cylindrical and is positioned between the screen cylinder 31 and the grinding jar 12. One end of the guide tube 32 extends into the interior of the grinding jar 12, and the other end extends into the interior of the screen cylinder 31. This ensures communication between the guide tube 32 and the interiors of both the screen cylinder 31 and the grinding jar 12. Sealing rings are provided at the connections between the guide tube 32 and the screen cylinder 31 and the grinding jar 12 to achieve a sealed connection and prevent material leakage.

[0029] Reference Figure 2The discharge pipe 33 is also fixedly mounted on the frame 1 by a bracket. One end of the discharge pipe 33 extends horizontally into the end of the screen cylinder 31 away from the ball mill jar 12. A rotary sealing ring is also provided at the connection between the discharge pipe 33 and the screen cylinder 31 to achieve a rotary sealing setting. Four guide plates 34 are provided. The four guide plates 34 are evenly distributed and welded along the circumference of the inner side wall of the screen cylinder 31. The guide plates 34 are set in an inclined state. The inclination direction of the guide plates 34 is adapted to the rotation direction of the screen cylinder 31, so that the material entering the screen cylinder 31 can move towards the discharge pipe 33 along the inclination direction of the guide plates 34 when the screen cylinder 31 rotates under the action of the guide plates 34. The screen 35 is fixedly mounted on the end face of the discharge pipe 33 located inside the screen cylinder 31 by bolts. The mesh size of the screen 35 is set according to the grinding particle size requirements of the ferrite magnet material and is used to screen the material entering the discharge pipe 33.

[0030] Reference Figure 2 and Figure 3 To prevent clogging of the screen 35, a vibration mechanism 4 is installed on the discharge pipe 33. The vibration mechanism 4 includes a mounting frame 41, a vibration motor 42, a vibration rod 43, and an elastic element 44. The mounting frame 41 is fixedly installed on the outer wall of the discharge pipe 33 by bolts; the vibration motor 42 is a miniature eccentric vibration motor 42, which is fixedly installed on the top of the mounting frame 41 by bolts. The vibration rod 43 is a stainless steel round rod, one end of which is fixedly connected to the output end of the vibration motor 42 by a coupling, and the other end extends through the side wall of the discharge pipe 33 into the discharge pipe 33, with a sealing sleeve provided at the penetration point between the vibration rod 43 and the discharge pipe 33. The end of the vibration rod 43 located inside the discharge pipe 33 is welded and fixed to the middle of the screen 35. The elastic element 44 is a compression spring. The elastic element 44 is sleeved on the part of the vibrating rod 43 located inside the discharge pipe 33. One end of the elastic element 44 abuts against the inner wall of the discharge pipe 33, and the other end abuts against the side of the screen 35, so as to play a buffering role when the screen 35 vibrates.

[0031] Reference Figure 2 To perform secondary grinding on the unqualified materials inside the screen cylinder 31, a number of grinding protrusions 13 are integrally formed on the inner side wall of the screen cylinder 31. The grinding protrusions 13 are evenly distributed along the circumference and axial direction of the inner side wall of the screen cylinder 31, and the cross-section of the grinding protrusions 13 is triangular, with the apex of the triangle facing the center of the screen cylinder 31. When the material rotates with the screen cylinder 31, it can fully collide and rub against the grinding protrusions 13 to achieve secondary grinding.

[0032] Reference Figure 2 and Figure 4A recycling mechanism 5 is installed on the frame 1 to recycle unqualified materials screened out by the screen 35. The recycling mechanism 5 includes a recycling cover 51, a limiting component 52, a recycling hopper 53, and a collection box 54. A rectangular recycling hole, located near the bottom of the screen cylinder 31, is provided on the outer wall of the screen cylinder 31 and communicates with the interior. The recycling cover 51 is made of a metal plate that matches the shape of the recycling hole. The recycling cover 51 is hinged and rotated on the outer wall of the screen cylinder 31 to open and close the recycling hole.

[0033] Reference Figure 2 and Figure 4 A limiting component 52 is mounted on the screen cylinder 31 and located on one side of the recovery hole. The limiting component 52 is used to limit the position of the recovery cover 51 when the recovery hole is closed. The recovery hopper 53 is a funnel-shaped structure made of metal. The recovery hopper 53 is fixedly mounted on the frame 1 by a bracket. The recovery hopper 53 is located directly below the screen cylinder 31. The opening size of the recovery hopper 53 is larger than the size of the recovery hole, and the opening faces the bottom of the screen cylinder 31. It is used to collect unqualified materials falling out of the recovery hole. The collection box 54 is a rectangular box made of plastic. It is placed below the discharge port at the bottom of the recovery hopper 53. The upper opening of the collection box 54 is open. It is used to collect unqualified materials discharged from the recovery hopper 53.

[0034] Reference Figure 2 and Figure 4 The limiting component 52 includes a limiting frame 55 and a limiting bolt 56. The limiting frame 55 has a "U"-shaped structure and is welded and fixed to the outer wall of the screen cylinder 31, located at the edge of the recycling hole. A limiting groove is formed on the inner side of the limiting frame 55. When the recycling cover 51 closes the recycling hole, the side of the recycling cover 51 away from the hinge is engaged in the limiting groove. The limiting bolt 56 is a hand-tightening bolt. The limiting bolt 56 passes through a pre-set through hole on the recycling cover 51 and is threadedly connected to a pre-set threaded hole on the limiting frame 55 to fix the recycling cover 51. In addition, a rubber sealing gasket is pasted and fixed in the limiting groove of the limiting frame 55. When the recycling cover 51 is engaged in the limiting groove, the rubber sealing gasket can fill the gap between the recycling cover 51 and the limiting frame 55, improving the sealing performance.

[0035] The working principle of this application embodiment is as follows: Grinding preparation: Place the ferrite magnet material to be ground and the grinding media into the ball mill jar 12, close the feed port of the ball mill jar 12, and set the speed of the drive motor 21 according to the material grinding requirements.

[0036] Material grinding: Start the drive motor 21, which drives the drive wheel 22 to rotate. The drive wheel 22 drives the driven wheel 23 to rotate via the transmission belt 24, which in turn drives the ball mill jar 12 to rotate. During the rotation of the ball mill jar 12, the grinding media inside collide and rub against the material, thereby achieving the grinding of the material.

[0037] Material screening: The ground material enters the screen cylinder 31 through the guide tube 32 under the rotation of the ball mill jar 12. Since the screen cylinder 31 rotates synchronously with the ball mill jar 12, the guide plate 34 inside the screen cylinder 31 drives the material to rotate with the screen cylinder 31, and moves towards the discharge pipe 33 under the inclined guidance of the guide plate 34. At the same time, the vibration motor 42 of the vibration mechanism 4 is started. The vibration motor 42 drives the screen 35 to vibrate through the vibration rod 43. When the material moves to the discharge pipe 33, the material that meets the particle size requirements passes through the screen 35 and enters the discharge pipe 33 and is discharged, while the material that does not meet the particle size requirements is blocked by the screen 35 inside the screen cylinder 31.

[0038] Secondary grinding and recycling: As the screen cylinder 31 rotates, the substandard material inside 31 collides and rubs against the grinding protrusions 13 on the inner wall of 31, achieving secondary grinding. When a certain amount of substandard material accumulates in the screen cylinder 31, the equipment is stopped, the limit bolt 56 of the limit component 52 is unscrewed, the recycling cover 51 is opened, and the screen cylinder 31 is rotated so that the recycling hole faces the recycling hopper 53. Under the action of gravity, the substandard material falls from the recycling hole into the recycling hopper 53, and is then guided into the collection box 54. After recycling is completed, the recycling cover 51 is closed, the limit bolt 56 is tightened, and the substandard material in the collection box 54 can be poured back into the ball mill jar 12 for further grinding.

[0039] Throughout the entire operation of the equipment, the shock-absorbing pads 11 at the bottom of the frame 1 can effectively absorb equipment vibration and reduce noise; the sealing rings and rubber gaskets at each rotating seal connection can prevent material leakage and ensure the sealing and stability of the equipment operation.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A ball mill for grinding ferrite magnets, characterized in that: The assembly includes a frame (1) and a ball mill jar (12) mounted on the frame (1). The ball mill jar (12) is used for grinding materials. A screening device (3) is mounted on the frame (1) for screening the particles of the ground material in the ball mill jar (12). The screening device (3) includes: A sieve cylinder (31) is rotatably mounted on a frame (1) and connected to a ball mill jar (12). The sieve cylinder (31) and the ball mill jar (12) rotate synchronously. The conduit (32) is disposed between the sieve cylinder (31) and the ball mill jar (12). The conduit (32) is connected to the inside of both the sieve cylinder (31) and the ball mill jar (12). The conduit (32) is sealed to both the sieve cylinder (31) and the ball mill jar (12). The ground material in the ball mill jar (12) enters the sieve cylinder (31) through the conduit (32). The discharge pipe (33) is set on the frame (1), one end of the discharge pipe (33) extends into the screen cylinder (31), and the connection between the discharge pipe (33) and the screen cylinder (31) is rotatably sealed. A guide plate (34) is provided, and a plurality of the guide plates (34) are evenly distributed on the inner side wall of the screen cylinder (31). The guide plates (34) are set in an inclined state. The material entering the screen cylinder (31) rotates with the screen cylinder (31) under the action of the guide plates (34) and moves to the discharge pipe (33) under the guidance of the guide plates (34). A screen (35) is set at one end of the discharge pipe (33) inside the screen cylinder (31). The screen (35) screens the material entering the discharge pipe (33).

2. The ball mill for grinding ferrite magnets according to claim 1, characterized in that: A vibration mechanism (4) is provided on the discharge pipe (33). The vibration mechanism (4) is used to drive the screen (35) to vibrate. The vibration mechanism (4) includes: Mounting bracket (41), which is fixedly mounted on the outer wall of the discharge pipe (33); Vibration motor (42), which is fixedly mounted on mounting bracket (41); Vibrating rod (43), one end of which is fixedly connected to the output end of vibrating motor (42), and the other end extends into the discharge pipe (33) and is fixedly connected to the screen (35); The elastic element (44) is sleeved on the part of the vibrating rod (43) located inside the discharge pipe (33). One end of the elastic element (44) abuts against the inner wall of the discharge pipe (33), and the other end abuts against the screen (35).

3. The ball mill for grinding ferrite magnets according to claim 1, characterized in that: The inner wall of the sieve cylinder (31) is provided with a plurality of grinding protrusions (13), which are evenly distributed on the inner wall of the sieve cylinder (31) and have a triangular cross-section.

4. The ball mill for grinding ferrite magnets according to claim 1, characterized in that: A recycling mechanism (5) is provided on the frame (1). The recycling mechanism (5) is used to recycle the unqualified materials screened out by the screen (35). The recycling mechanism (5) includes: The recycling cover (51) has a recycling hole that communicates with the interior on the outer wall of the screen cylinder (31). The recycling cover (51) is rotatably mounted on the screen cylinder (31) and is used to open and close the recycling hole. A limiting component (52) is provided on the screen cylinder (31) and is used to limit the position of the recycling cover (51) when the recycling hole is closed; The recycling hopper (53) is set on the frame (1) and is located below the screen cylinder (31). The opening of the recycling hopper (53) faces the bottom of the screen cylinder (31). The recycling hopper (53) is used to receive unqualified materials that fall out from the recycling hole. Collection box (54) is placed at the bottom of recycling hopper (53), and the upper opening of collection box (54) is open.

5. A ball mill for grinding ferrite magnets according to claim 4, characterized in that: The limiting component (52) includes: A limiting frame (55) is provided on the screen cylinder (31) and located at the recycling hole of the screen cylinder (31). A limiting groove is provided on the limiting frame (55). When the recycling cover (51) closes the recycling hole, the recycling cover (51) is engaged in the limiting groove. A limiting bolt (56) passes through the recycling cover (51) and is threadedly connected to the limiting frame (55).

6. The ball mill for grinding ferrite magnets according to claim 1, characterized in that: A drive mechanism (2) is provided on the frame (1). The drive mechanism (2) is used to drive the ball mill jar (12) and the sieve cylinder (31) to rotate synchronously. The drive mechanism (2) includes: A drive motor (21) is fixedly mounted on the frame (1); The drive wheel (22) is fixedly sleeved on the output shaft of the drive motor (21); Driven wheel (23), which is fixedly sleeved on the outer side wall of the ball mill jar (12); A drive belt (24) is fitted on the drive pulley (22) and the driven pulley (23).

7. A ball mill for grinding ferrite magnets according to claim 5, characterized in that: A rubber sealing gasket is provided in the limiting groove of the limiting frame (55).

8. A ball mill for grinding ferrite magnets according to claim 1, characterized in that: Shock-absorbing pads (11) are provided at the four corners of the bottom of the frame (1).

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