A magnetic separation and purification device for lithium battery negative electrode sheet material

Abstract

The utility model discloses a kind of lithium battery negative pole piece material magnetic separation purification equipment, including magnetic separation purification box and the integrated end cap of being set in the front end of magnetic separation purification box, integrated end cap is close to four corners and is inserted with hand screw type fixed screw, and integrated end cap is fixedly connected with magnetic separation purification box by multiple hand screw type fixed screw, integrated end cap front end outer wall center is provided with pull handle, by additionally preselected type screening feed device in the top of magnetic separation purification box, replace original cylindrical feed hopper, after material is put in, the preselected screening net of material collecting frame separates large size impurities, avoid affecting purification, by rectangular dismounting slot convenient cleaning material collecting frame, material board and conical unloading cover make material uniform drop, improve magnetic separation efficiency and uniformity, closed baffle and fixed clamping plate flexible control material collecting frame position, convenient operation, the device optimizes feeding link, improves magnetic separation purification equipment working quality and efficiency, reduces subsequent purification difficulty.

Description

Technical Field

[0001] This utility model belongs to the technical field of lithium battery anode material processing, specifically relating to a magnetic separation and purification device for lithium battery anode material. Background Technology

[0002] In the current booming lithium battery industry, the quality of lithium battery anode materials plays a decisive role in the performance and lifespan of lithium batteries. To ensure the high quality of anode materials, magnetic separation purification equipment has become a crucial link in the production process. However, during the magnetic separation purification process, the lithium battery anode materials to be purified are often mixed with various impurities, some of which have larger particle sizes that can interfere with the magnetic separation process. These large particles of impurities may not only block the channels of the magnetic separation equipment but also affect the adsorption effect of the magnetic field on magnetic impurities in the anode material, leading to a decrease in magnetic separation efficiency and ultimately affecting the purification quality of the anode material. Secondly, the stability and uniformity of the feeding process have a significant impact on the magnetic separation purification effect. Traditional feeding methods make it difficult to ensure that the anode material enters the magnetic separation area uniformly and stably. The material may accumulate near the feed inlet or experience localized high or low concentrations when entering the magnetic separation equipment, preventing the magnetic separation process from functioning effectively and reducing the consistency and reliability of the purification. Utility Model Content

[0003] The purpose of this invention is to provide a magnetic separation and purification device for lithium battery anode materials, in order to solve the problem mentioned in the background art that the lithium battery anode materials to be purified are often mixed with a variety of impurities, some of which are large particles that interfere with the magnetic separation process, block the magnetic separation equipment channels, affect the magnetic field's adsorption of magnetic impurities, and reduce the magnetic separation efficiency and purification quality.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a magnetic separation purification device for lithium battery negative electrode materials, comprising a magnetic separation purification box and an integrated end cap disposed at the front end of the magnetic separation purification box. Each of the four corners of the integrated end cap is fitted with a hand-tightening fixing screw, and the integrated end cap is fixedly connected to the magnetic separation purification box via multiple hand-tightening fixing screws. A pull handle is provided at the center of the outer wall at the front end of the integrated end cap. Multiple magnetic rods are equidistantly arranged on both the upper and lower sides of the center of the rear end of the integrated end cap, with the rear ends of the multiple magnetic rods close to the inner rear wall of the magnetic separation purification box. The multiple magnetic rods on the upper side of the center of the rear end of the integrated end cap and the multiple magnetic rods on the lower side of the center of the rear end are staggered. A rectangular discharge port is provided inside the top of the magnetic separation purification box, and a pre-selection screening feeding device is provided at the top of the magnetic separation purification box, and the pre-selection screening feeding device is connected to the interior of the magnetic separation purification box through the rectangular discharge port.

[0005] Preferably, the pre-selection screening and feeding device includes a baffle bar, a collection frame, a pre-selection screening screen, a rectangular feeding cylinder, and a rectangular disassembly slot. The rectangular feeding cylinder has a fixed flange on its bottom exterior, which is fixed to the top of the magnetic separation and purification box by multiple screws. The rectangular feeding cylinder is located directly above the rectangular discharge port inside the top of the magnetic separation and purification box. A rectangular disassembly slot is provided on the lower side of the center of the right end of the rectangular feeding cylinder, and the rectangular disassembly slot is close to the bottom end of the rectangular feeding cylinder. The baffle bar is fixedly connected to the inner wall of the rectangular feeding cylinder near the bottom front and rear ends and the left end. A collection frame is placed on the baffle bar. A pre-selection screening screen is fixed inside the bottom opening of the collection frame, and the collection frame can be directly pulled out to the right through the rectangular disassembly slot by sliding to the right.

[0006] Preferably, the pre-selection screening and feeding device further includes a closing baffle, a switch handle, and a fixing clamp. The closing baffle is provided at the right end of the collecting frame. When the outer wall of the left end of the collecting frame is in contact with the inner wall of the left end of the rectangular feeding cylinder, the closing baffle is blocked outside the right end of the rectangular feeding cylinder. A switch handle is provided at the center of the right end of the closing baffle. Fixing clamps are welded to both the front and rear ends of the closing baffle, and both fixing clamps extend to the left.

[0007] Preferably, the switch handle can drive the closing baffle to move left and right, and the closing baffle can drive the material collection frame to move left and right. When the closing baffle moves to the left and the two fixed clamps come into contact with the rectangular feed cylinder, the closing baffle can be pushed to the left so that the two fixed clamps are respectively clamped to the outer walls of the front and rear ends on the right side of the center of the rectangular feed cylinder, and the fixed clamps in the clamped state can prevent the closing baffle from driving the material collection frame to move to the right.

[0008] Preferably, the pre-selection screening and feeding device further includes a material equalization plate, material equalization holes, and a conical discharge cover. The material equalization plate is provided inside the lower side of the center of the rectangular feeding cylinder. The material equalization plate is fixed horizontally inside the rectangular feeding cylinder and is located above the material collection frame. Multiple material equalization holes are equidistantly arranged inside the material equalization plate. A conical discharge cover is provided at the bottom end of each of the multiple material equalization holes. The opening diameter at the top of each of the multiple conical discharge covers is larger than the opening diameter at the bottom.

[0009] Preferably, each of the four corners of the bottom of the magnetic separation purification box is provided with a support column, the multiple support columns are all vertically downward, the bottom of the multiple support columns are welded with a base plate, and the bottom of the multiple support columns are connected to each other with a reinforcing connecting rod.

[0010] Preferably, the bottom of the magnetic separation and purification box is provided with a discharge collection guide cover, and the bottom of the magnetic separation and purification box is provided with a discharge port, and the magnetic separation and purification box is connected to the inside of the discharge collection guide cover through the discharge port.

[0011] Preferably, the top opening area of ​​the discharge collection guide cover is larger than the bottom opening area, and the inner wall of the discharge collection guide cover is smooth and burr-free, and a discharge discharge cylinder is provided at the bottom of the discharge collection guide cover.

[0012] Compared with the prior art, this utility model provides a magnetic separation and purification device for lithium battery negative electrode materials, which has the following beneficial effects:

[0013] This invention adds a novel pre-selection screening and feeding device to the top of the magnetic separation purification box, replacing the original cylindrical feeding hopper. When the lithium battery negative electrode material to be magnetically purified is fed into this device, the pre-selection screening screen of the collection frame performs preliminary screening, separating out oversized impurities to prevent them from entering the magnetic separation purification box and affecting the purification effect. The rectangular disassembly slot allows for easy removal of the collection frame to clean impurities. The even distribution holes and conical discharge hood of the even distribution plate ensure uniform material flow, improving the efficiency and uniformity of magnetic separation purification. The closed baffle and fixed clamp cooperate to flexibly control the position of the collection frame, facilitating operation. This device optimizes the feeding process, improves the overall working quality and efficiency of the magnetic separation purification equipment, and reduces the difficulty of subsequent purification work. Attached Figure Description

[0014] Figure 1 This is a front-view three-dimensional structural diagram of a magnetic separation and purification device for lithium battery negative electrode material according to this utility model.

[0015] Figure 2 This is a front view schematic diagram of a magnetic separation and purification device for lithium battery negative electrode material according to this utility model.

[0016] Figure 3 This is a schematic diagram of the integrated end cap in the open state and the internal three-dimensional structure of the magnetic separation purification box of this utility model.

[0017] Figure 4 This is a cross-sectional three-dimensional structural diagram of the pre-selection screening and feeding device of this utility model.

[0018] Figure 5 This is a three-dimensional disassembly diagram of the pre-selection screening and feeding device of this utility model.

[0019] In the diagram: 1. Support column; 2. Discharge cylinder; 3. Discharge collection guide cover; 4. Hand-tightening fixing screw; 5. Pull-out handle; 6. Integrated end cap; 7. Magnetic separation purification box; 8. Pre-selection screening feeding device; 9. Magnetic rod; 10. Baffle bar; 11. Collection frame; 12. Pre-selection screening screen; 13. Material equalization plate; 14. Material equalization round hole; 15. Rectangular feed cylinder; 16. Conical discharge cover; 17. Closing baffle; 18. Rectangular disassembly and assembly slot; 19. Switch handle; 20. Fixing clamp. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] This utility model provides, for example Figure 1-5 The illustrated magnetic separation purification equipment for lithium battery negative electrode materials includes a magnetic separation purification box 7 and an integrated end cover 6 located at the front end of the magnetic separation purification box 7. Hand-tightened fixing screws 4 are inserted near each of the four corners of the integrated end cover 6, and the integrated end cover 6 is fixedly connected to the magnetic separation purification box 7 via multiple hand-tightened fixing screws 4. A pull handle 5 is located at the center of the outer wall of the front end of the integrated end cover 6. Multiple magnetic rods 9 are equidistantly arranged on both the upper and lower sides of the center of the rear end of the integrated end cover 6, with the rear ends of the magnetic rods 9 close to the inner rear wall of the magnetic separation purification box 7. The magnetic rods 9 on the upper side of the center of the rear end of the integrated end cover 6 and the magnetic rods 9 on the lower side of the center of the rear end of the integrated end cover 6 are staggered. The magnetic separation purification box 7, as the core load-bearing component of the entire equipment, provides a stable physical space for purification operations. The integrated end cover 6 is tightly connected to the magnetic separation purification box 7 via the hand-tightened fixing screws 4 at the four corners. This connection method ensures structural stability and provides convenience for subsequent maintenance and repair. The pull handle 5 at the front end allows the operator to easily access the equipment. The integrated end cap 6 can be easily disassembled and installed, allowing for the inspection, cleaning, or replacement of the key internal component—the magnetic rod 9. A rectangular discharge port is located at the top of the magnetic separation and purification box 7, and a pre-selection screening and feeding device 8 is also installed at the top of the box. This device connects to the interior of the magnetic separation and purification box 7 via the rectangular discharge port. Multiple sets of staggered magnetic rods 9 are the core components for achieving magnetic separation and purification. Based on magnetic principles, these magnetic rods 9 create a complex and orderly magnetic field environment inside the magnetic separation and purification box 7. When the lithium battery negative electrode material enters the magnetic separation and purification box 7 through the pre-selection screening and feeding device 8, different substances in the material experience varying degrees of force in the magnetic field due to their magnetic differences. Magnetic impurities are strongly adsorbed onto the surface of the magnetic rods 9, while the lithium battery negative electrode material itself, due to its weak or non-magnetic nature, continues to move downwards under the influence of gravity and internal airflow, thus achieving the separation of magnetic impurities from the negative electrode material and achieving the purpose of magnetic separation and purification.

[0022] like Figure 1 , Figure 2 and Figure 3As shown, each of the four corners of the bottom of the magnetic separation and purification box 7 is equipped with a support column 1. Multiple support columns 1 are vertically downwards, and each support column 1 has a base plate welded to its bottom. Reinforcing connecting rods connect the bottom ends of the support columns 1 to each other. The base plates welded to the bottom of the support columns 1 and the interconnecting reinforcing connecting rods together form a stable support structure. This structure can not only withstand the weight of the equipment itself and various forces during operation, but also effectively reduce equipment vibration, ensuring the stability of the equipment during long-term operation, thereby guaranteeing the accuracy and reliability of the magnetic separation and purification work. A discharge collection guide hood 3 is provided at the bottom of the magnetic separation and purification box 7. A discharge port is provided inside the bottom of the magnetic separation and purification box 7, and the magnetic separation and purification box 7 is connected to the interior of the discharge collection guide hood 3 through the discharge port. The opening area at the top of the discharge collection guide hood 3 is larger than [missing information - likely a number]. The bottom opening area is larger than the bottom opening area, and the inner wall of the discharge collection guide cover 3 is smooth and burr-free. The bottom end of the discharge collection guide cover 3 is equipped with a discharge discharge cylinder 2. The discharge collection guide cover 3 and the discharge discharge cylinder 2 are responsible for collecting and discharging the purified lithium battery negative electrode material. The design of the top opening area of ​​the discharge collection guide cover 3 being larger than the bottom opening area, as well as the smooth and burr-free inner wall, allows the purified material to smoothly converge into the discharge discharge cylinder 2 under the action of gravity and be discharged from the equipment through the discharge discharge cylinder 2, completing the entire magnetic separation purification process. Moreover, the entire lithium battery negative electrode material magnetic separation purification equipment, through the precise design and coordinated work of each component, utilizes the magnetic field characteristics, the differences in the physical properties of the material, and a reasonable structural layout to achieve efficient and stable magnetic separation purification of lithium battery negative electrode material, providing a strong guarantee for the quality improvement of negative electrode material in the lithium battery production process.

[0023] like Figure 1 , Figure 4 and Figure 5As shown, the pre-selection screening and feeding device 8 includes a baffle 10, a collection frame 11, a pre-selection screening screen 12, a rectangular feeding cylinder 15, and a rectangular disassembly slot 18. A fixing flange is provided on the outer bottom of the rectangular feeding cylinder 15, and the fixing flange is fixed to the top of the magnetic separation and purification box 7 by multiple screws. The rectangular feeding cylinder 15 is located directly above the rectangular discharge port inside the top of the magnetic separation and purification box 7. As the main frame of the device, the rectangular feeding cylinder 15 is securely installed on the top of the magnetic separation and purification box 7 through the tight fit of the fixing flange on the outer bottom and multiple screws, precisely positioned directly above the rectangular discharge port inside the top of the magnetic separation and purification box 7. This precise installation position ensures that the lithium battery negative pressure after processing by this device is effectively controlled. The electrode material can fall vertically into the magnetic separation and purification box 7 without obstruction, providing a stable material supply channel for subsequent magnetic separation and purification. A rectangular disassembly slot 18 is provided inside the lower side of the center of the right end of the rectangular feed cylinder 15, and this slot 18 is close to the bottom of the rectangular feed cylinder 15. A baffle 10 is fixedly connected to the inner wall of the rectangular feed cylinder 15 near the bottom, front and rear ends, and left end. A collection frame 11 is placed on the baffle 10. A pre-selection screening screen 12 is fixed inside the bottom opening of the collection frame 11. The collection frame 11 can be slid to the right and pulled out directly through the rectangular disassembly slot 18. As the core component of the pre-selection screening, the collection frame 11 has a pre-selection screening screen 12 fixed inside its bottom opening. 2. When the lithium battery negative electrode material is fed into the rectangular feed cylinder 15 through the inlet, it first falls into the collection frame 11. The mesh size of the pre-selection screening screen 12 is carefully designed to perform preliminary screening of the input material according to the particle size standard of the lithium battery negative electrode material. Impurities larger than the mesh size of the screening screen, such as larger metal particles and agglomerated materials, will be intercepted in the collection frame 11, while lithium battery negative electrode material that meets the size requirements can pass smoothly through the screening screen and fall into the lower space of the rectangular feed cylinder 15. This pre-selection screening operation is of great significance because it can effectively remove larger particle impurities that may interfere with the magnetic separation process before the material enters the magnetic separation purification box 7. This prevents these impurities from entering the magnetic separation area along with the negative electrode material, thereby reducing interference factors in the magnetic separation process and improving magnetic separation efficiency and purification effect. In addition, the rectangular disassembly slot 18 set inside the lower side of the right center of the rectangular feed cylinder 15 provides great convenience for cleaning and maintenance of the collection frame 11. After long-term use, a large amount of intercepted impurities will accumulate inside the collection frame 11, which needs to be cleaned in time. At this time, the operator only needs to slide the collection frame 11 to the right, and it can be directly pulled out of the rectangular feed cylinder 15 through the rectangular disassembly slot 18, so as to conveniently and quickly clean or replace the collection frame 11 and the pre-selection screening screen 12, ensuring the continuous and stable operation of the pre-selection screening function.

[0024] like Figure 1 , Figure 4 and Figure 5As shown, the pre-selection screening and feeding device 8 also includes a closed baffle 17, a switch handle 19, and fixed clamping plates 20. A closed baffle 17 is provided at the right end of the collecting frame 11. When the outer wall of the left end of the collecting frame 11 is in contact with the inner wall of the left end of the rectangular feeding cylinder 15, the closed baffle 17 is blocked outside the right end of the rectangular feeding cylinder 15. A switch handle 19 is provided at the center of the right end of the closed baffle 17. Fixed clamping plates 20 are welded to both the front and rear ends of the closed baffle 17. Both fixed clamping plates 20 extend to the left. The switch handle 19 can drive the closed baffle 17 to move left and right, and the closed baffle 17 can drive the collecting frame 11 to move left and right. During the leftward movement of the closed baffle 17, when the two fixed clamping plates 20 contact the rectangular feeding cylinder 15, the closed baffle 17 can be pushed to the left so that the two fixed clamping plates 20 are respectively clamped onto the outer walls of the front and rear ends of the right side of the center of the rectangular feeding cylinder 15. The fixed clamping plates 20 in the clamped state can... To prevent the closing baffle 17 from moving the collection frame 11 to the right, when it is necessary to securely fix the collection frame 11 during actual operation, the operator pushes the switch handle 19 to move the closing baffle 17 to the left. During this process, the fixing clamps 20, which are pre-welded to the front and rear ends of the closing baffle 17 and extend to the left, will gradually approach the rectangular feed cylinder 15 as the closing baffle 17 moves. After the fixing clamps 20 contact the rectangular feed cylinder 15, the operator only needs to push the closing baffle 17 to the left with appropriate force. At this time, the two fixing clamps 20 will be precisely and firmly clamped on the outer walls of the front and rear ends of the right side of the center of the rectangular feed cylinder 15. This tight clamping state plays a crucial role. It can form a strong resistance and effectively prevent the closing baffle 17 from moving the collection frame 11 to the right. In this way, the collection frame 11 can be stably fixed in a specific position.

[0025] like Figure 1 , Figure 4 and Figure 5As shown, the pre-selection screening and feeding device 8 also includes a material equalization plate 13, material equalization holes 14, and a conical discharge cover 16. The material equalization plate 13 is located inside the lower side of the center of the rectangular feeding cylinder 15. The material equalization plate 13 is fixed horizontally inside the rectangular feeding cylinder 15 and is positioned above the collecting frame 11. Multiple material equalization holes 14 are equidistantly arranged inside the material equalization plate 13. A conical discharge cover 16 is located at the bottom of each of the multiple material equalization holes 14. The opening diameter at the top of each conical discharge cover 16 is larger than the opening diameter at the bottom. The function of the material equalization plate 13 is to further optimize the feeding uniformity of the lithium battery negative electrode material. The design of the multiple material equalization holes 14 equidistantly distributed inside the material equalization plate 13 allows the material falling after pre-selection screening to be dispersed, preventing material from concentrating in a certain area. In one area, each material equalization hole 14 is equipped with a conical feeding hood 16 at its bottom. The top opening diameter of the conical feeding hood 16 is larger than the bottom opening diameter. This special structural design allows the material to diffuse further in all directions under the guidance of the conical inner wall after entering the conical feeding hood 16 through the material equalization hole 14, thus achieving a more uniform falling distribution. Through the action of the material equalization plate 13 and the conical feeding hood 16, the lithium battery negative electrode material entering the magnetic separation purification box 7 can achieve a relatively uniform distribution in both the horizontal and vertical directions, avoiding situations where the local material concentration is too high or too low. This provides a more stable and uniform material input for the subsequent magnetic separation purification process, which helps to improve the consistency and stability of the magnetic separation effect and ensures that the quality of the finally purified lithium battery negative electrode material is more reliable.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A magnetic separation purification device for lithium battery negative electrode material, comprising a magnetic separation purification box (7) and an integrated end cap (6) disposed at the front end of the magnetic separation purification box (7), wherein each of the four corners of the integrated end cap (6) is fitted with a hand-tightening fixing screw (4), and the integrated end cap (6) is fixedly connected to the magnetic separation purification box (7) by a plurality of hand-tightening fixing screws (4), a pull handle (5) is provided at the center of the outer wall of the front end of the integrated end cap (6), and a plurality of magnetic rods (9) are equidistantly arranged on both the upper and lower sides of the center of the rear end of the integrated end cap (6), and the rear ends of the plurality of magnetic rods (9) are close to the inner wall of the rear end of the magnetic separation purification box (7), and the plurality of magnetic rods (9) on the upper side of the center of the rear end of the integrated end cap (6) and the plurality of magnetic rods (9) on the lower side of the center of the rear end are staggered with each other, characterized in that: The magnetic separation purification box (7) has a rectangular discharge port inside its top, and a pre-selection screening feed device (8) is provided at the top of the magnetic separation purification box (7), and the pre-selection screening feed device (8) is connected to the inside of the magnetic separation purification box (7) through the rectangular discharge port. The pre-selection screening and feeding device (8) includes a baffle bar (10), a collection frame (11), a pre-selection screening screen (12), a rectangular feed cylinder (15), and a rectangular disassembly slot (18). The bottom of the rectangular feed cylinder (15) is provided with a fixing flange, which is fixed to the top of the magnetic separation and purification box (7) by multiple screws. The rectangular feed cylinder (15) is located directly above the rectangular discharge port inside the top of the magnetic separation and purification box (7). The center of the right end of the rectangular feed cylinder (15) is located below... A rectangular disassembly slot (18) is provided inside the side, and the rectangular disassembly slot (18) is close to the bottom end of the rectangular feed cylinder (15). The rectangular feed cylinder (15) is connected and fixed to the front and rear ends and the left inner wall near the bottom. A collection frame (11) is placed on the collection frame (10). A pre-selection screening screen (12) is fixed inside the bottom opening of the collection frame (11). The collection frame (11) can be directly pulled out to the right through the rectangular disassembly slot (18) when it slides to the right.

2. The magnetic separation and purification equipment for lithium battery negative electrode material according to claim 1, characterized in that: The pre-selection screening and feeding device (8) also includes a closed baffle (17), a switch handle (19), and a fixed clamp (20). The right end of the collection frame (11) is provided with a closed baffle (17). When the outer wall of the left end of the collection frame (11) is in contact with the inner wall of the left end of the rectangular feed cylinder (15), the closed baffle (17) is blocked outside the right end of the rectangular feed cylinder (15). The center of the right end of the closed baffle (17) is provided with a switch handle (19). Fixed clamps (20) are welded to both the front and rear ends of the closed baffle (17). Both fixed clamps (20) extend to the left.

3. The magnetic separation and purification equipment for lithium battery negative electrode materials according to claim 2, characterized in that: The switch handle (19) can drive the closing baffle (17) to move left and right. The closing baffle (17) can drive the collection frame (11) to move left and right. When the closing baffle (17) moves to the left and the two fixed clamps (20) come into contact with the rectangular feed cylinder (15), the closing baffle (17) can be pushed to the left so that the two fixed clamps (20) are clamped to the outer walls of the front and rear ends on the right side of the center of the rectangular feed cylinder (15). The fixed clamps (20) in the clamped state can prevent the closing baffle (17) from driving the collection frame (11) to move to the right.

4. The magnetic separation and purification equipment for lithium battery negative electrode material according to claim 3, characterized in that: The pre-selection screening and feeding device (8) further includes a material equalization plate (13), material equalization holes (14), and a conical discharge cover (16). The material equalization plate (13) is provided inside the lower side of the center of the rectangular feeding cylinder (15). The material equalization plate (13) is fixed horizontally inside the rectangular feeding cylinder (15) and is located above the material collection frame (11). Multiple material equalization holes (14) are provided at equal intervals inside the material equalization plate (13). A conical discharge cover (16) is provided at the bottom of each of the multiple material equalization holes (14). The opening diameter at the top of the multiple conical discharge covers (16) is larger than the opening diameter at the bottom.

5. The magnetic separation and purification equipment for lithium battery negative electrode material according to claim 1, characterized in that: The magnetic separation purification box (7) is provided with a support column (1) at each of the four corners at the bottom. The multiple support columns (1) are all vertically downward. The bottom of the multiple support columns (1) is welded with a base plate. The bottom of the multiple support columns (1) are connected to each other by a reinforcing connecting rod.

6. The magnetic separation and purification equipment for lithium battery negative electrode material according to claim 5, characterized in that: The bottom of the magnetic separation purification box (7) is provided with a discharge collection guide cover (3), and the bottom of the magnetic separation purification box (7) is provided with a discharge port, and the magnetic separation purification box (7) is connected to the inside of the discharge collection guide cover (3) through the discharge port.

7. The magnetic separation and purification equipment for lithium battery negative electrode material according to claim 6, characterized in that: The top opening area of ​​the discharge collection guide cover (3) is larger than the bottom opening area, and the inner wall of the discharge collection guide cover (3) is smooth and burr-free. The bottom end of the discharge collection guide cover (3) is provided with a discharge cylinder (2).

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