Neodymium iron boron material skin recycling device and method thereof

Abstract

The application discloses a recycling device and method for neodymium iron boron material skin, which comprises a grinding box, a feeding hopper is arranged on the grinding box, a plurality of grinding rollers are arranged in the grinding box, the grinding rollers are used for extruding and grinding the particles after the neodymium iron boron material skin is crushed, a separation mechanism is arranged on one side of each grinding roller, the separation mechanism comprises a separation block, one end of the separation block is inclined and used for shoveling materials, an open separation groove is arranged at the upper end of the separation block, a separation screen is arranged at the inlet of the separation groove, and a plurality of electrostatic adsorption plates are further arranged at the bottom of the separation block and used for adsorbing fine particles at the bottom of the separation block. The particles of the neodymium iron boron material skin after being extruded by the grinding rollers can be screened in time, the particles meeting the size can be screened and separated in time, the particles are effectively prevented from being repeatedly extruded and ground, the size of a large number of particles is effectively prevented from being too small, and the particles after screening can be extruded and ground again in time, so that the overall grinding efficiency is fully improved.

Description

Technical Field

[0001] This invention belongs to the field of recycling and processing technology of NdFeB material, specifically relating to a recycling and regeneration device and method for NdFeB material. Background Technology

[0002] In modern industry, neodymium iron boron (NdFeB) permanent magnets are widely used in many key sectors such as electronics, new energy vehicles, and wind power generation due to their excellent properties, including high remanence, high coercivity, and high energy product. However, the production and processing of NdFeB materials generates a large amount of waste material.

[0003] The recycling and processing of NdFeB scrap mainly includes physical methods, chemical methods, and combined physical and chemical methods. The physical method first uses magnetic separation to separate the NdFeB scrap from other non-magnetic impurities, then feeds it into a crusher for coarse crushing to a particle size of 5-20mm, followed by fine crushing through grinding to a particle size of less than 1mm, and finally screening before further processing according to particle size.

[0004] When the inventors were crushing NdFeB scrap particles, they found that the existing equipment, which uses a uniform feeding and discharging method, could not separate the required particles in a timely manner. This resulted in the particles being repeatedly squeezed and ground, causing some particles to be too small and thus causing unnecessary waste.

[0005] Therefore, this study aims to improve the existing structure and address its shortcomings, providing a recycling device and method for NdFeB material casings, with the goal of achieving greater practical value. Summary of the Invention

[0006] In view of at least one problem in the prior art, an object of the present invention is to provide a device and method for recycling and regenerating neodymium iron boron (NdFeB) foil.

[0007] To achieve the above objectives, the present invention employs the following technical solution:

[0008] A recycling and regeneration device for NdFeB material includes a grinding box with a feeding hopper. The grinding box contains multiple rotating grinding rollers arranged in a ring. These rollers are used to grind and compress the crushed NdFeB material particles. Each grinding roller has a synchronously moving separation mechanism on one side for separating materials of a set fineness. The separation mechanism includes a separation block with one end inclined for scooping up materials. An open separation trough is located at the top of the separation block, with a fixedly connected, inclined separation screen at the inlet. Multiple electrostatic adsorption plates are also located at the bottom of the separation block for adsorbing fine particles.

[0009] Preferably, the bottom of the separation block is provided with a rotatable conveying ring, the electrostatic adsorption plate is rotatably connected to the conveying ring, the bottom of the separation block is also provided with a flow guide ring plate, one side of the flow guide ring plate is provided with a flow guide ring groove for sliding connection of the end of the electrostatic adsorption plate, and the flow guide ring plate is provided with a notch groove for the electrostatic adsorption plate to fall and separate, and one side of the conveying ring is provided with a flow guide arc plate for guiding and conveying the electrostatic adsorption plate into the flow guide ring groove after it falls.

[0010] Preferably, the bottom of the separation block is provided with an adsorption groove, and two rotatable conveying discs for driving the conveying ring to rotate are provided on one side wall of the adsorption groove. The flow guiding arc plate is fixedly connected to the side wall of the adsorption groove, and the flow guiding ring plate is fixedly connected to the other side wall of the adsorption groove. An electrostatic generator is also provided in the grinding box. Multiple first joints are provided in the conveying ring. The electrostatic generator is electrically connected to the first joints. A second joint is provided at the end of the electrostatic adsorption plate. When the electrostatic adsorption plate is located in the flow guiding ring plate, the first joint and the second joint are electrically connected. When the electrostatic adsorption plate is located at the notch, the first joint and the second joint are separated.

[0011] Preferably, the separation tank is provided with a collection box for collecting materials after the electrostatic adsorption plate rotates. After the electrostatic adsorption plate rotates and falls, it contacts and collides with the side wall of the collection box. The vibration causes the fine particles to separate in time. After the electrostatic adsorption plate comes into contact with the collection tank, the static electricity in the electrostatic adsorption plate is released.

[0012] Preferably, the grinding box has an annular grinding ring groove, the grinding roller is disposed in the grinding ring groove, the grinding box has a rotating shaft rotatably connected in the middle, the rotating shaft has a plurality of fixed rods fixedly connected, the fixed rods are rotatably connected to the grinding roller, the upper end of the grinding box has a feed inlet connected to the feed hopper, the rotating shaft is rotatably connected to the feed inlet, the upper end of the rotating shaft has a plurality of guide grooves connected to the feed inlet, and the side wall of the rotating shaft has a plurality of guide pipes connected to the other end of the guide grooves, the extension ends of the guide pipes are respectively located at the front end of the grinding roller in the rotation direction, and the feed inlet has a fixedly connected lever.

[0013] Preferably, the bottom of the separation tank is provided with a conveying trough for material collection, and the conveying trough is provided with a rotatable spiral conveying rod. The grinding box is also provided with a discharge ring groove. One side of the grinding box is provided with a discharge port that communicates with the discharge ring groove. The discharge ring groove is inclined as a whole, so that the material in the discharge ring groove can automatically slide down to the discharge port by gravity. One side of the separation block is provided with a discharge hopper that communicates with the conveying trough, and the extension end of the discharge hopper is located in the discharge ring groove.

[0014] Preferably, the rotating shaft is provided with a plurality of fixedly connected positioning rods, and the end of each positioning rod is provided with a fixed frame that is fixedly connected and is U-shaped, and the fixed frame is fixedly connected to the separating block.

[0015] Preferably, the fixed frame is provided with a rotatable and inclined conveyor belt, and the conveyor belt is provided with a plurality of fixedly connected and retractable material-pushing plates, which are used to transport materials to the separation screen.

[0016] Preferably, the positioning rod is provided with a rotatably connected drive wheel, the drive wheel is rolledly connected to the corresponding bottom, and one end of the drive wheel is provided with a fixedly connected drive gear. The fixed frame is provided with two rotatably connected first conveying wheels, and one side of the fixed frame is provided with a conveying gear connected to one of the first conveying wheels. The drive gear meshes with the conveying gear.

[0017] A method for using a neodymium iron boron (NdFeB) scrap recycling and regeneration device, comprising the following steps:

[0018] S1 feeds the crushed NdFeB material particles into the feed hopper, and the feed hopper causes the NdFeB material particles to be laid in a ring in the grinding box;

[0019] S2 then rotates the grinding roller, which then extrudes and grinds the NdFeB material particles.

[0020] After the S3 grinding rollers extrude the material, the separating blocks move synchronously with the grinding rollers. The separating blocks can scoop up the extruded NdFeB material particles and transport them to the separating screen. The separating screen can promptly screen and separate the particles that meet the size requirements after extrusion. The screened particles automatically slide down with the separating screen and continue to be laid, waiting for the next grinding roller to extrude them.

[0021] After the S4 separating block scoops up and conveys a portion of the NdFeB material particles, the remaining fine particles are promptly adsorbed by the electrostatic adsorption plate as they pass through, preventing the fine particles from being excessively ground.

[0022] Compared with the prior art, the present invention has the following technical effects:

[0023] The design of multiple grinding rollers improves the grinding efficiency of NdFeB scrap particles through sequential compression. The design of the separation block and separation screen allows for timely screening of the NdFeB scrap particles after compression, effectively separating particles of the correct size and preventing repeated compression and grinding that could lead to a large number of particles being too small. Furthermore, the screened particles can be promptly compressed and ground again by the next grinding roller, significantly improving the overall grinding efficiency. Simultaneously, the addition of the electrostatic adsorption plate addresses the issue that the separation block cannot scoop up all the particles, leaving some fine particles at the bottom. The electrostatic adsorption plate effectively adsorbs and separates these fine particles, preventing them from being repeatedly compressed and ground into powder, thus avoiding unnecessary overall loss.

[0024] The design of the conveyor ring, guide ring plate, notch groove, and guide arc plate allows multiple electrostatic adsorption plates to rotate in a ring shape via the rotation of the conveyor ring. This enables the electrostatic adsorption plates to continuously adsorb fine particles. Simultaneously, the rotating connection between the notch groove and the electrostatic adsorption plates ensures that when the electrostatic adsorption plates reach the notch groove, their ends lose support and automatically rotate to a vertical position due to gravity. This allows for automatic separation of material particles from the surface of the electrostatic adsorption plates. Furthermore, the guide arc plate ensures that the fallen electrostatic adsorption plates automatically return to their initial position during subsequent movement, allowing for continuous adsorption of fine particles. This design effectively prevents the electrostatic adsorption plates from over-adsorbing, which would reduce overall adsorption efficiency.

[0025] The design of the first and second connectors allows the electrostatic adsorption plate to maintain its adsorption force when it is located in the flow guide ring groove, and to lose its adsorption force when it rotates to a vertical position. This design allows fine particles on the surface of the electrostatic adsorption plate to fall off and separate in a timely manner after it rotates to a vertical position.

[0026] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the invention can be employed. It should be understood that the embodiments of the present invention are not limited in scope as a result.

[0027] Features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0028] It should be emphasized that the term "including / comprises" as used herein refers to the presence of a feature, whole, step, or component, but does not exclude the presence or addition of one or more other features, wholes, steps, or components. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the external three-dimensional structure of the grinding box provided by the present invention.

[0031] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the grinding box provided by the present invention.

[0032] Figure 3 A schematic diagram of the three-dimensional structure of the fixed frame provided by the present invention.

[0033] Figure 4 This is a schematic diagram of the three-dimensional connection structure of the conveyor belt and the separator block provided by the present invention.

[0034] Figure 5 This is a schematic diagram of the three-dimensional connection structure of the conveying ring and electrostatic adsorption plate provided by the present invention.

[0035] Figure 6 Provided by the present invention Figure 5 Enlarged view of point A in the middle.

[0036] Figure 7 This is a top view schematic diagram of the connection structure of the drive wheel, the conveying gear, and the second gear provided by the present invention.

[0037] Explanation of the numbers in the diagram: 1. Grinding box; 11. Feed hopper; 12. Discharge port; 13. Discharge ring groove; 14. Grinding ring groove; 15. Rotating shaft; 151. Guide groove; 152. Guide pipe; 2. Grinding roller; 3. Fixing frame; 31. Positioning rod; 311. Drive wheel; 312. Drive gear; 313. Conveying gear; 314. Second gear; 315. Fixing shaft; 316. Second bevel gear; 317. First bevel gear; 3 18. Synchronous shaft; 32. Discharge hopper; 33. Conveyor belt; 34. Feeding plate; 35. First conveyor wheel; 36. Separating block; 360. Separating trough; 361. Spiral conveyor rod; 362. Conveying trough; 363. Separating screen; 37. Adsorption trough; 371. Electrostatic adsorption plate; 372. Conveying ring; 373. Guide rod; 374. Collection box; 375. Guide ring plate; 376. Guide ring groove; 377. Second conveyor wheel. Detailed Implementation

[0038] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0039] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or may be interposed with another element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or may be interposed with another element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0041] Example 1, please refer to Figure 1 , Figure 2 and Figure 4 A recycling device for NdFeB material includes a grinding box 1 with a feeding hopper 11. The grinding box 1 contains multiple rotating grinding rollers 2 arranged in a ring. The grinding rollers 2 are used to grind and compress the particles of the NdFeB material after crushing. Each grinding roller 2 has a separation mechanism on one side that can move synchronously and is used to separate materials of a set fineness. The separation mechanism includes a separation block 36, one end of which is inclined for scooping up materials. The upper end of the separation block 36 has an open separation trough 360. The inlet of the separation trough 360 has a fixedly connected and inclined separation screen 363. The bottom of the separation block 36 also has multiple electrostatic adsorption plates 371 for adsorbing fine particles at the bottom of the separation block 36.

[0042] The design of multiple grinding rollers 2 improves the grinding efficiency of NdFeB material particles through sequential extrusion by multiple grinding rollers 2. The design of separation block 36 and separation screen 363 enables timely screening of NdFeB material particles after extrusion by grinding rollers 2, and timely separation of particles that meet the size requirements. This effectively prevents particles from being repeatedly extruded and ground, resulting in a large number of particles with excessively small particle sizes. Furthermore, the screened particles can be extruded and ground again by the next grinding roller 2 in a timely manner, which greatly improves the overall grinding efficiency. At the same time, the addition of electrostatic adsorption plate 371 is beneficial because separation block 36 cannot scoop up all the particles. Therefore, there will inevitably be some small particles at the bottom of separation block 36. The presence of electrostatic adsorption plate 371 can adsorb and separate the small particles in a timely manner, effectively preventing the small particles from being repeatedly extruded and ground into powder, thus preventing unnecessary overall loss.

[0043] In this embodiment, please refer to Figure 4 , Figure 5 The bottom of the separation block 36 is provided with a rotatable conveying ring 372. The electrostatic adsorption plate 371 is rotatably connected to the conveying ring 372. The bottom of the separation block 36 is also provided with a flow guide ring plate 375. One side of the flow guide ring plate 375 is provided with a flow guide ring groove 376 for sliding connection of the end of the electrostatic adsorption plate 371. The flow guide ring plate 375 is provided with a notch groove for the electrostatic adsorption plate 371 to fall and separate. One side of the conveying ring 372 is provided with a flow guide arc plate for guiding the electrostatic adsorption plate 371 to the flow guide ring groove 376 after it falls.

[0044] The design of the conveying ring 372, the guide ring plate 375, the notch, and the guide arc plate allows multiple electrostatic adsorption plates 371 to rotate in a ring shape by the rotation of the conveying ring 372. This enables the electrostatic adsorption plates 371 to continuously adsorb fine particles. Simultaneously, the rotating connection between the notch and the electrostatic adsorption plates 371 ensures that when the electrostatic adsorption plates 371 move to the notch, their ends lose support and automatically rotate to a vertical position due to gravity. This allows material particles on the surface of the electrostatic adsorption plates 371 to automatically separate. Combined with the guide arc plate, the fallen electrostatic adsorption plates 371 automatically return to their initial state during subsequent movement, ensuring continuous adsorption of fine particles. This design effectively prevents the electrostatic adsorption plates 371 from adsorbing too much material, thus avoiding a decrease in overall adsorption efficiency.

[0045] In this embodiment, please refer to Figure 5 , Figure 6The extended end of the electrostatic adsorption plate 371 is provided with a fixedly connected guide rod 373. The guide rod 373 is slidably connected in the guide ring groove 376. Since the electrostatic adsorption plate 371 is relatively large, it is difficult for the electrostatic adsorption plate 371 to enter the guide ring groove 376. The addition of the guide rod 373 can reduce the size and enable the electrostatic adsorption plate 371 to move horizontally better.

[0046] In this embodiment, please refer to Figure 4 , Figure 5 The bottom of the separation block 36 is provided with an adsorption groove 37. Two rotatable conveying discs are provided on one side wall of the adsorption groove 37 to drive the conveying ring 372 to rotate. The flow guide arc plate is fixedly connected to the side wall of the adsorption groove 37, and the flow guide ring plate 375 is fixedly connected to the other side wall of the adsorption groove 37. An electrostatic generator is also provided in the grinding box 1. Multiple first joints are provided in the conveying ring 372. The electrostatic generator is electrically connected to the first joints. The end of the electrostatic adsorption plate 371 is provided with a second joint. When the electrostatic adsorption plate 371 is located in the flow guide ring plate 375, the first joint and the second joint are electrically connected. When the electrostatic adsorption plate 371 is located at the notch, the first joint and the second joint are separated.

[0047] The design of the first and second connectors allows the electrostatic adsorption plate 371 to maintain its adsorption force when it is located in the flow guide ring groove 376, and to lose its adsorption force when it rotates to a vertical position. This design allows fine particles on the surface of the electrostatic adsorption plate 371 to fall off and separate in a timely manner after it rotates to a vertical position.

[0048] In this embodiment, please refer to Figure 5 The separation tank 360 is equipped with a collection box 374 for collecting materials after the electrostatic adsorption plate 371 rotates. After the electrostatic adsorption plate 371 rotates and falls, it contacts and collides with the side wall of the collection box 374. The vibration causes the fine particles to separate in time. After the electrostatic adsorption plate 371 contacts the collection tank, the static electricity in the electrostatic adsorption plate 371 is released.

[0049] The design of the collection box 374 can collect the fine particles falling from the electrostatic adsorption plate 371 in a timely manner. Furthermore, the side wall of the collection box 374 can release the static electricity inside the electrostatic adsorption plate 371 through collision after the electrostatic adsorption plate 371 rotates and falls, and can also make the fine particles on the surface of the electrostatic adsorption plate 371 fall and separate more quickly.

[0050] In this embodiment, please refer to Figure 2The grinding box 1 is provided with an annular grinding ring groove 14. The grinding roller 2 is set in the grinding ring groove 14. The grinding box 1 is provided with a rotating shaft 15 rotatably connected in the middle. The rotating shaft 15 is provided with a number of fixed rods fixedly connected. The fixed rods are rotatably connected to the grinding roller 2. The upper end of the grinding box 1 is provided with a feed inlet connected to the feed hopper 11. The rotating shaft 15 is rotatably connected to the feed inlet. The upper end of the rotating shaft 15 is provided with a number of guide grooves 151 connected to the feed inlet. The side wall of the rotating shaft 15 is provided with a number of guide pipes 152 connected to the other end of the guide grooves 151. The extension ends of the guide pipes 152 are respectively located at the front end of the rotation direction of the grinding roller 2. The feed inlet is provided with a fixedly connected lever.

[0051] The design of the feed hopper 11, feed inlet, guide channel 151, and guide pipe 152 allows NdFeB scrap particles to enter the feed inlet through the feed hopper 11 and then be automatically laid in the grinding box 1 through the guide channel 151 and guide pipe 152. This design enables continuous grinding in the grinding box 1, improving overall efficiency. At the same time, the design of the lever, since the rotating shaft 15 is rotating, allows the lever to automatically move the particles at the upper end of the rotating shaft 15 to the corresponding guide channel 151, effectively preventing the material from accumulating at the end of the rotating shaft 15.

[0052] In this embodiment, please refer to Figure 4 The bottom of the separation tank 360 is provided with a conveying tank 362 for material collection. The conveying tank 362 is provided with a rotatable spiral conveying rod 361. The grinding box 1 is also provided with a discharge ring groove 13. The side of the grinding box 1 is provided with a discharge port 12 connected to the discharge ring groove 13. The discharge ring groove 13 is inclined, so that the material in the discharge ring groove 13 can automatically slide down to the discharge port 12 by gravity. The side of the separation block 36 is provided with a discharge hopper 32 connected to the conveying tank 362. The extension end of the discharge hopper 32 is located in the discharge ring groove 13.

[0053] In this embodiment, please refer to Figure 2 The rotating shaft 15 is provided with multiple fixedly connected positioning rods 31. The end of the positioning rod 31 is provided with a fixed frame 3 in the shape of a U, which is fixedly connected to the separation block 36.

[0054] In this embodiment, a rotatable and inclined conveyor belt 33 is provided inside the fixed frame 3. Multiple fixedly connected and retractable material-pushing plates 34 are provided on the conveyor belt 33. The material-pushing plates 34 are used to transport materials to the separating screen 363.

[0055] In this embodiment, please refer to Figure 2 , Figure 7The positioning rod 31 is provided with a drive wheel 311 that is rotatably connected. The drive wheel 311 is rotatably connected to the corresponding bottom. One end of the drive wheel 311 is provided with a drive gear 312 that is fixedly connected. The fixed frame 3 is provided with two first conveying wheels 35 that are rotatably connected. One side of the fixed frame 3 is provided with a conveying gear 313 that is connected to one of the first conveying wheels 35. The drive gear 312 meshes with the conveying gear 313.

[0056] In this embodiment, please refer to Figure 2 , Figure 7 The fixed frame 3 is also provided with a first gear and a second gear 314. The first gear is connected to the spiral conveyor rod 361. The adsorption tank 37 is provided with two rotatably connected second conveyor wheels 377. One of the second conveyor wheels 377 is provided with a fixedly connected synchronous shaft 318 in the middle. The end of the synchronous shaft 318 is provided with a fixedly connected first bevel gear 317. The outer side of the first bevel gear 317 is provided with a meshing second bevel gear 316. The middle of the second bevel gear 316 is provided with a fixedly connected fixed shaft 315. The end of the fixed shaft 315 is fixedly connected to the second gear 314. The first gear and the second gear 314 are respectively meshed with the drive gear 312.

[0057] When this application is used:

[0058] First, the material is fed into the feed hopper 11. The material enters the guide trough 151 and guide pipe 152 through the feed inlet. Then, it is laid in the grinding box 1 through the guide pipe 152. At the same time, the rotating shaft 15 is controlled to rotate, which drives the guide pipe 152 to lay the material in a ring. After the material is laid, the rotating shaft 15 can synchronously drive the grinding roller 2 to squeeze the laid material in time. When the squeezed material passes through the separation block 36, the slope on one side of the separation block 36 and the rotation of the conveyor belt 33 can lift and transport the squeezed material to the separation screen 363. Due to gravity, the material automatically moves downward from the separation screen 363. Particles of the correct size automatically fall into the separation trough 360 for collection, while larger particles automatically slide down and continue to be laid in the grinding box 1.

[0059] Material entering the separating screen 363 automatically falls into the conveying trough 362 due to gravity. With the rotation of the screw conveyor 361, it is automatically conveyed to the discharge hopper 32, and then automatically falls into the discharge ring groove 13 by gravity. Due to the inclination of the discharge ring groove 13, it is automatically discharged through the discharge port 12. This design can realize both extrusion and grinding, timely screening, and timely replenishment, improving the overall extrusion and grinding efficiency, and effectively preventing the material from being ground to an excessively small size, thus avoiding waste.

[0060] Since the separating block 36 cannot scoop up all the material particles, some fine particles will inevitably pass through the bottom of the separating block 36, causing repeated grinding and squeezing of the fine particles, making the particles smaller and smaller, resulting in waste. When the fine particles move to the adsorption tank 37, the electrostatic adsorption plate 371 can adsorb the fine particles in time. As the conveying ring 372 rotates, the electrostatic adsorption plate 371 with the adsorbed fine particles can be conveyed to the upper end of the conveying ring 372. When the electrostatic adsorption plate 371 moves to the notch, the end of the electrostatic adsorption plate 371 loses support and will automatically rotate and fall until it contacts and collides with the side wall of the collection box 374. The design of the first joint and the second joint means that once the electrostatic adsorption plate 371 rotates, it loses the source of static electricity. After contacting and colliding with the collection box 374, the static electricity in the electrostatic adsorption plate 371 disappears, so that the fine particles can automatically fall into the collection box 374 under the action of gravity and the collision and vibration of the electrostatic adsorption plate 371, realizing the automatic collection of fine particles.

[0061] As the conveying ring 372 continues to move, and under the action of the guide arc plate, the electrostatic adsorption plate 371 can automatically rotate from a vertical position to a horizontal position, and the end of the electrostatic adsorption plate 371 automatically moves into the guide ring groove 376, realizing the automatic charging of the electrostatic adsorption plate 371 for the next adsorption; thus realizing the continuous adsorption of fine particles.

[0062] As the rotating shaft 15 rotates, the positioning rod 31 rotates synchronously. Since the drive wheel 311 is in contact with the inner wall of the grinding box 1, the drive wheel 311 rotates automatically. The rotation of the drive wheel 311, through the meshing transmission of gears, drives the conveyor belt 33, the spiral conveyor rod 361, and the conveyor ring 372 to rotate synchronously.

[0063] A method for using a neodymium iron boron (NdFeB) scrap recycling and regeneration device, comprising the following steps:

[0064] S1 feeds the crushed NdFeB material particles into the feed hopper 11, and the feed hopper 11 makes the NdFeB material particles lay in a ring in the grinding box 1;

[0065] S2 then rotates the grinding roller 2, and the rotated grinding roller 2 extrudes and grinds the neodymium iron boron material particles;

[0066] After the S3 grinding roller 2 extrudes, the separating block 36 moves synchronously with the grinding roller 2. The separating block 36 can scoop up the extruded NdFeB material particles and transport them to the separating screen 363. The separating screen 363 can promptly screen and separate the particles that meet the size requirements after extrusion. The screened particles automatically slide down with the separating screen 363 and continue to be laid, waiting for the next extrusion by the grinding roller 2.

[0067] After the S4 separating block 36 scoops up and conveys a portion of the NdFeB material particles, the remaining fine particles are promptly adsorbed by the electrostatic adsorption plate 371 as they pass through it, preventing the fine particles from being excessively ground.

[0068] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified elements, components, parts, or steps, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute included by “may” is optional.

[0069] Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The use of "a" or "an" to describe an element, component, part, or step does not imply the exclusion of other elements, components, parts, or steps.

[0070] It should be understood that the above description is for illustrative purposes and not for limitation. Many embodiments and applications beyond the provided examples will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this application should not be determined by reference to the above description, but rather by reference to the appended claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the inventors have not considered that subject matter as part of the disclosed inventive subject matter.

Claims

1. A recycling and regeneration device for NdFeB scrap, characterized in that: The device includes a grinding box with a feed hopper. Inside the grinding box are multiple rotating grinding rollers arranged in a ring. These grinding rollers are used to grind and compress the particles after the NdFeB material is crushed. Each grinding roller has a separation mechanism on one side that can move synchronously and is used to separate materials with a set fineness. The separation mechanism includes a separation block. One end of the separation block is inclined for scooping up the material, and the upper end of the separation block has an open separation trough. The inlet of the separation trough is equipped with a fixedly connected and inclined separation screen. The bottom of the separation block is also equipped with multiple electrostatic adsorption plates for adsorbing fine particles at the bottom of the separation block. The bottom of the separation block is provided with a rotatable conveying ring, the electrostatic adsorption plate is rotatably connected to the conveying ring, the bottom of the separation block is also provided with a flow guide ring plate, one side of the flow guide ring plate is provided with a flow guide ring groove for sliding connection of the end of the electrostatic adsorption plate, and the flow guide ring plate is provided with a notch groove for the electrostatic adsorption plate to fall and separate, and one side of the conveying ring is provided with a flow guide arc plate for guiding and conveying the electrostatic adsorption plate into the flow guide ring groove after it falls. The bottom of the separation block is provided with an adsorption groove. Two rotatable conveying discs for driving the conveying ring are provided on one side wall of the adsorption groove. The flow guiding arc plate is fixedly connected to the side wall of the adsorption groove, and the flow guiding ring plate is fixedly connected to the other side wall of the adsorption groove. An electrostatic generator is also provided in the grinding box. Multiple first connectors are provided in the conveying ring. The electrostatic generator is electrically connected to the first connectors. A second connector is provided at the end of the electrostatic adsorption plate. When the electrostatic adsorption plate is located in the flow guiding ring plate, the first connector and the second connector are electrically connected. When the electrostatic adsorption plate is located at the notch, the first connector and the second connector are separated. The separation tank is equipped with a collection box for collecting materials after the electrostatic adsorption plate rotates. After the electrostatic adsorption plate rotates and falls, it contacts and collides with the side wall of the collection box. The vibration causes the fine particles to separate in time. After the electrostatic adsorption plate contacts the collection tank, the static electricity in the electrostatic adsorption plate is released. The grinding box has an annular grinding ring groove, and the grinding roller is disposed in the grinding ring groove. A rotating shaft is rotatably connected in the middle of the grinding box. Multiple fixed rods are fixedly connected on the rotating shaft. The fixed rods are rotatably connected to the grinding roller. The upper end of the grinding box has a feed inlet connected to the feed hopper. The rotating shaft is rotatably connected to the feed inlet. The upper end of the rotating shaft has multiple guide grooves connected to the feed inlet. Multiple guide pipes connected to the other end of the guide grooves are provided on the side wall of the rotating shaft. The extension ends of the guide pipes are respectively located at the front end of the grinding roller in the rotation direction. A lever is fixedly connected in the feed inlet.

2. The recycling and regeneration device for NdFeB scrap according to claim 1, characterized in that: The bottom of the separation tank is provided with a conveying trough for material collection. The conveying trough is provided with a rotatable spiral conveying rod. The grinding box is also provided with a discharge ring groove. One side of the grinding box is provided with a discharge port that communicates with the discharge ring groove. The discharge ring groove is inclined as a whole, so that the material in the discharge ring groove can automatically slide down to the discharge port by gravity. One side of the separation block is provided with a discharge hopper that communicates with the conveying trough. The extension end of the discharge hopper is located in the discharge ring groove.

3. The recycling and regeneration device for NdFeB scrap according to claim 1, characterized in that: The rotating shaft is provided with multiple fixedly connected positioning rods, and the ends of the positioning rods are provided with fixedly connected U-shaped fixing frames, which are fixedly connected to the separating block.

4. The recycling and regeneration device for NdFeB scrap according to claim 3, characterized in that: The fixed frame is equipped with a rotatable and inclined conveyor belt, and the conveyor belt is equipped with multiple fixedly connected and retractable material-pushing plates, which are used to transport materials to the separation screen.

5. The recycling and regeneration device for NdFeB scrap according to claim 4, characterized in that: The positioning rod is provided with a rotatably connected drive wheel, which contacts the inner wall of the grinding box. One end of the drive wheel is provided with a fixedly connected drive gear. The fixed frame is provided with two rotatably connected first conveying wheels, and one side of the fixed frame is provided with a conveying gear connected to one of the first conveying wheels. The drive gear meshes with the conveying gear.

6. A method of using a recycling and regeneration device for NdFeB scrap, comprising the recycling and regeneration device for NdFeB scrap as described in any one of claims 1-5, characterized in that, Includes the following steps: S1 feeds the crushed NdFeB material particles into the feed hopper, and the feed hopper causes the NdFeB material particles to be laid in a ring in the grinding box; S2 then rotates the grinding roller, which then extrudes and grinds the NdFeB material particles. After the S3 grinding rollers extrude the material, the separating blocks move synchronously with the grinding rollers. The separating blocks can scoop up the extruded NdFeB material particles and transport them to the separating screen. The separating screen can promptly screen and separate the particles that meet the size requirements after extrusion. The screened particles automatically slide down with the separating screen and continue to be laid, waiting for the next grinding roller to extrude them. After the S4 separating block scoops up and conveys a portion of the NdFeB material particles, the remaining fine particles are promptly adsorbed by the electrostatic adsorption plate as they pass through, preventing the fine particles from being excessively ground.

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