Recycling and regenerating device and method for neodymium-iron-boron material skin

Abstract

The neodymium iron boron material skin recycling and regenerating device 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 particles obtained after neodymium iron boron material skin crushing, a separating mechanism is arranged on one side of each grinding roller, and each separating mechanism comprises a separating block; one end of the separation block is inclined and used for shoveling materials, an open type separation groove is formed in the upper end of the separation block, a separation screen is arranged at an inlet of the separation groove, and a plurality of electrostatic adsorption plates used for adsorbing fine particles at the bottom of the separation block are further arranged at the bottom of the separation block. According to the neodymium-iron-boron material skin screening device, neodymium-iron-boron material skin particles extruded by a grinding roller can be screened in time, particles meeting the size can be screened and separated in time, the situation that the particle size of a large number of particles is too small due to the fact that the particles are repeatedly extruded and ground is effectively prevented, and the screened particles can be extruded and ground again in time; and the overall grinding efficiency is fully improved.

Description

Technical Field

[0001] The invention belongs to the technical field of recycling and processing of NdFeB material skins, and in particular relates to a recycling and regeneration device and method for NdFeB material skins. Background Art

[0002] In the modern industrial field, NdFeB permanent magnet materials are widely used in many key industries such as electronics, new energy vehicles, wind power generation, etc. due to their excellent properties such as high remanence, high coercivity and high magnetic energy product. However, a large amount of material waste will be generated during the production and processing of NdFeB materials.

[0003] There are mainly physical, chemical and physical-chemical methods for the recycling of NdFeB skin. The physical method is to first separate the NdFeB skin from other non-magnetic impurities by magnetic separation, and then send it to the crusher for coarse crushing to a particle size of 5-20mm, and then grind it to a fine crushing to a particle size of less than 1mm, and then screen it for subsequent deep processing according to the particle size;

[0004] When the inventors were finely crushing the crushed NdFeB skin particles, they found that the existing equipment used a unified feeding and discharging method during the fine crushing process, and was unable to separate the required particles in a timely manner, resulting in repeated extrusion and grinding of the required particles, causing some particles to be too small in size, thereby causing unnecessary waste.

[0005] Therefore, the existing structure and defects are studied and improved, and a NdFeB skin recovery and regeneration device and method are provided, in order to achieve a more practical purpose. 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 NdFeB skin recovery and regeneration device and method.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A recycling and regeneration device for NdFeB material skin, comprising a grinding box, a feeding hopper is provided on the grinding box, a plurality of rotatable grinding rollers which are evenly distributed in an annular shape are provided in the grinding box, the grinding rollers are used to extrude and grind the particles after the NdFeB material skin is crushed, a separation mechanism which can move synchronously and is used to separate materials with set fineness is provided on one side of the grinding rollers, the separation mechanism comprises a separation block, one end of the separation block is inclined for scooping up materials, an open separation trough is provided at the upper end of the separation block, a fixedly connected and inclined separation screen is provided at the inlet of the separation trough, and a plurality of electrostatic adsorption plates for adsorbing fine particles at the bottom of the separation block are also provided at the bottom of the separation block.

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

[0010] Preferably, an adsorption groove is provided at the bottom of the separation block, two rotatable conveying plates for driving the conveying ring to rotate are provided on one side wall of the adsorption groove, the guide arc plate is fixedly connected to the side wall of the adsorption groove, the guide ring plate is fixedly connected to the other side wall of the adsorption groove, an electrostatic generator is also provided in the grinding box, a plurality of first joints are provided in the conveying ring, the electrostatic generator is electrically connected to the first joint, a second joint is provided at the end of the electrostatic adsorption plate, when the electrostatic adsorption plate is located in the guide ring plate, the first joint is electrically connected to the second joint, and when the electrostatic adsorption plate is located at the notch, the first joint is separated from the second joint.

[0011] Preferably, a collecting box for collecting materials after the electrostatic adsorption plate rotates is provided in the separation tank. After the electrostatic adsorption plate rotates and falls, it contacts and collides with the side wall of the collecting box, and the fine particles are separated in time through vibration. After the electrostatic adsorption plate contacts the collecting tank, the static electricity in the electrostatic adsorption plate is released.

[0012] Preferably, the grinding box is provided with an annular grinding ring groove, the grinding roller is arranged in the grinding ring groove, a rotatably connected rotating shaft is provided in the middle of the grinding box, a plurality of fixedly connected fixing rods are provided on the rotating shaft, the fixed rods are rotatably connected to the grinding roller, a feed port connected to the feed hopper is provided at the upper end of the grinding box, the rotating shaft is rotatably connected to the feed port, a plurality of guide grooves connected to the feed port are provided at the upper end of the rotating shaft, and a plurality of guide pipes connected to the other end of the guide grooves are provided on the side wall of the rotating shaft, the extending ends of the guide pipes are respectively located at the front ends of the rotation direction of the grinding roller, and a fixedly connected shifting rod is provided in the feed port.

[0013] Preferably, a conveying trough for collecting materials is provided at the bottom of the separation trough, a rotatable spiral conveying rod is provided in the conveying trough, a discharge ring groove is also provided in the grinding box, a discharge port connected to the discharge ring groove is provided on one side of the grinding box, and the discharge ring groove is inclined as a whole, so that the material in the discharge ring groove can automatically slide to the discharge port by gravity, and a discharge hopper connected to the conveying trough is provided on one side of the separation block, and the extension end of the discharge hopper is located in the discharge ring groove.

[0014] Preferably, a plurality of fixedly connected positioning rods are provided on the rotating shaft, and a fixedly connected U-shaped fixing frame is provided at the end of the positioning rod, and the fixing frame is fixedly connected to the separation block.

[0015] Preferably, a rotatable and inclined conveyor belt is provided in the fixed frame, and a plurality of fixedly connected and retractable material-diverting plates are provided on the conveyor belt, and the material-diverting plates are used to convey the materials to the separation screen.

[0016] Preferably, a rotatably connected driving wheel is provided on the positioning rod, the driving wheel is rollingly connected to the corresponding bottom, and a fixedly connected driving gear is provided at one end of the driving wheel, two rotatably connected first conveying wheels are provided in the fixed frame, and a conveying gear connected to one of the first conveying wheels is provided on one side of the fixed frame, and the driving gear is meshed with the conveying gear.

[0017] A method for using a NdFeB material skin recycling device, using the NdFeB material skin recycling device, comprising the following steps:

[0018] S1 feeds the crushed NdFeB skin particles into a feed hopper, and the NdFeB skin particles are laid in a ring shape in the grinding box through the feed hopper;

[0019] S2 then rotates the grinding roller, and the rotating grinding roller extrudes and grinds the NdFeB skin particles;

[0020] After the S3 grinding roller is extruded, the separation block moves synchronously with the grinding roller. The separation block can scoop up the extruded NdFeB material skin particles and transport them to the separation screen. The separation screen can timely screen and separate the particles that meet the size after extrusion. The screened particles automatically slide down with the separation screen and continue to be laid, waiting for the next grinding roller to be extruded;

[0021] After the S4 separation block scoops up a part of the NdFeB material skin particles for transportation, the remaining fine particles are promptly adsorbed by the electrostatic adsorption plate when passing through the electrostatic adsorption plate to prevent 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 can improve the grinding efficiency of NdFeB skin particles through the sequential extrusion of multiple grinding rollers. The design of separation blocks and separation screens can timely screen the NdFeB skin particles after being extruded by the grinding rollers, and can timely screen and separate particles that meet the size, effectively preventing the particles from being repeatedly extruded and ground, resulting in a large number of particles being too small in size, and the screened particles can be promptly extruded and ground again by the next grinding roller, fully improving the overall grinding efficiency; at the same time, the addition of the electrostatic adsorption plate, since the separation block cannot scoop up all the particles, there must be a part of fine particles at the bottom of the separation block, and the existence of the electrostatic adsorption plate can timely adsorb and separate the fine particles, effectively preventing the fine particles from being repeatedly extruded and ground into powder, thereby causing overall unnecessary losses.

[0024] The design of the conveying ring bar, guide ring plate, notch groove and guide arc plate can utilize the rotation of the conveying ring bar to realize the circular rotation of multiple electrostatic adsorption plates, so that the electrostatic adsorption plate can continuously adsorb fine particles. At the same time, the design of the rotational connection between the notch groove and the electrostatic adsorption plate can make the electrostatic adsorption plate lose support at the end when it moves to the notch groove, and automatically rotate to a vertical state due to gravity, so that the material particles on the surface of the electrostatic adsorption plate can be automatically separated, and combined with the guide arc plate, the electrostatic adsorption plate that falls can automatically return to its original state under the action of the guide arc plate during the subsequent movement, so that the electrostatic adsorption plate can continuously adsorb fine particles. This design effectively prevents the problem of excessive adsorption of the electrostatic adsorption plate, which leads to a decrease in the overall adsorption efficiency.

[0025] The design of the first joint and the second joint can ensure that when the electrostatic adsorption plate is located in the guide ring groove, the electrostatic adsorption plate maintains adsorption force, and when the electrostatic adsorption plate is rotated to a vertical state, the electrostatic adsorption plate loses adsorption force. This design can ensure that after the electrostatic adsorption plate is rotated to a vertical state, fine particles on the surface of the electrostatic adsorption plate can fall and separate in time.

[0026] With reference to the following description and the accompanying drawings, the specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope thereby.

[0027] Features described and / or illustrated with respect to 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 “include / comprises” when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of 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 paying any creative labor.

[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 This is a schematic diagram of the three-dimensional structure of the fixing 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 separation blocks provided by the present invention.

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

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

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

[0037] Explanation of the reference numerals in the figure: 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, fixed frame; 31, positioning rod; 311, driving wheel; 312, driving gear; 313, conveying gear; 314, second gear; 315, fixed shaft; 316, second bevel gear; 317, first bevel gear; 3 18. Synchronous shaft; 32. Discharge hopper; 33. Conveyor belt; 34. Material removal plate; 35. First conveyor wheel; 36. Separation block; 360. Separation trough; 361. Screw conveyor rod; 362. Conveyor trough; 363. Separation screen; 37. Adsorption trough; 371. Electrostatic adsorption plate; 372. Conveyor ring strip; 373. Guide rod; 374. Collecting box; 375. Guide ring plate; 376. Guide ring groove; 377. Second conveyor wheel. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0039] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be another element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be another element centered thereon at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0041] Example 1, please refer to Figure 1 , Figure 2 and Figure 4 A recycling and regeneration device for NdFeB material skin comprises a grinding box 1, on which a feed hopper 11 is provided, and a plurality of ring-shaped uniformly distributed and rotatable grinding rollers 2 are provided in the grinding box 1, and the grinding rollers 2 are used for extruding and grinding the particles after the NdFeB material skin is crushed. A separation mechanism that can move synchronously and is used to set the fineness of material separation is provided on one side of the grinding rollers 2, and the separation mechanism comprises a separation block 36, one end of the separation block 36 is inclined for scooping up the material, and an open separation groove 360 ​​is provided at the upper end of the separation block 36, and a fixedly connected and inclined separation screen 363 is provided at the inlet of the separation groove 360, and a plurality of electrostatic adsorption plates 371 for adsorbing fine particles at the bottom of the separation block 36 are also provided at the bottom of the separation block 36.

[0042] The design of multiple grinding rollers 2 can improve the grinding efficiency of NdFeB skin particles by sequentially extruding multiple grinding rollers 2. The design of separation block 36 and separation screen 363 can timely screen the NdFeB skin particles after being extruded by grinding roller 2, and can timely screen and separate particles that meet the size, effectively preventing the particles from being repeatedly extruded and ground, resulting in a large number of particles being too small in size, and the screened particles can be timely extruded and ground again by the next grinding roller 2, which fully improves the overall grinding efficiency; at the same time, the addition of electrostatic adsorption plate 371, since the separation block 36 cannot scoop up all the particles, there must be a part of fine particles at the bottom of the separation block 36, and the existence of electrostatic adsorption plate 371 can timely adsorb and separate the fine particles, effectively preventing the fine particles from being repeatedly extruded and ground into powder, thereby causing overall unnecessary losses.

[0043] In this example, see Figure 4 , Figure 5 A rotatable conveying ring bar 372 is provided at the bottom of the separation block 36, and the electrostatic adsorption plate 371 is rotatably connected to the conveying ring bar 372. A guide ring plate 375 is also provided at the bottom of the separation block 36. A guide ring groove 376 for sliding connection of the end of the electrostatic adsorption plate 371 is provided on one side of the guide ring plate 375, and a notch groove is provided on the guide ring plate 375 for the electrostatic adsorption plate 371 to fall and separate. A guide arc plate is provided on one side of the conveying ring bar 372 for guiding and conveying the electrostatic adsorption plate 371 into the guide ring groove 376 after falling.

[0044] The design of the conveying ring bar 372, the guide ring plate 375, the notch groove and the guide arc plate can utilize the rotation of the conveying ring bar 372 to realize the circular rotation of multiple electrostatic adsorption plates 371, so that the electrostatic adsorption plates 371 can continuously adsorb fine particles. At the same time, the design of the rotational connection between the notch groove and the electrostatic adsorption plate 371 can make the electrostatic adsorption plate 371 lose support at the end when it moves to the notch groove, and automatically rotate to a vertical state due to gravity, so that the material particles on the surface of the electrostatic adsorption plate 371 can be automatically separated, and then cooperate with the guide arc plate, so that the electrostatic adsorption plate 371 that falls can automatically return to its original state under the action of the guide arc plate during the subsequent movement, so that the electrostatic adsorption plate 371 can continuously adsorb fine particles. This design effectively prevents the electrostatic adsorption plate 371 from adsorbing too much, resulting in a decrease in the overall adsorption efficiency.

[0045] In this example, see Figure 5 , Figure 6The extended end of the electrostatic adsorption plate 371 is provided with a fixedly connected guide rod 373, and the guide rod 373 is slidably connected in the guide ring groove 376. Since the electrostatic adsorption plate 371 is large in size, 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 of the electrostatic adsorption plate 371 so that it can better move horizontally.

[0046] In this example, see Figure 4 , Figure 5 An adsorption groove 37 is provided at the bottom of the separation block 36, and two rotatable conveying plates for driving the conveying ring 372 to rotate are provided on one side wall of the adsorption groove 37. The guide arc plate is fixedly connected to the side wall of the adsorption groove 37, and the 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, and a plurality of first joints are provided in the conveying ring 372. The electrostatic generator is electrically connected to the first joint. A second joint is provided at the end of the electrostatic adsorption plate 371. When the electrostatic adsorption plate 371 is located in the guide ring plate 375, the first joint is electrically connected to the second joint. When the electrostatic adsorption plate 371 is located at the notch, the first joint is separated from the second joint.

[0047] The design of the first joint and the second joint can ensure that when the electrostatic adsorption plate 371 is located in the guide ring groove 376, the electrostatic adsorption plate 371 maintains the adsorption force, and when the electrostatic adsorption plate 371 rotates to a vertical state, the electrostatic adsorption plate 371 loses the adsorption force. This design can ensure that after the electrostatic adsorption plate 371 rotates to a vertical state, fine particles on the surface of the electrostatic adsorption plate 371 can fall and separate in time.

[0048] In this example, see Figure 5 A collecting box 374 is provided in the separation tank 360 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 collecting box 374, and the fine particles are separated in time through vibration. After the electrostatic adsorption plate 371 contacts the collecting 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, and the side walls of the collection box 374 can release the static electricity in the electrostatic adsorption plate 371 by 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 example, see Figure 2A ring-shaped grinding groove 14 is provided in the grinding box 1, and the grinding roller 2 is arranged in the grinding groove 14. A rotating shaft 15 connected in rotation is provided in the middle of the grinding box 1. A plurality of fixed rods connected in rotation are provided on the rotating shaft 15. The fixed rods are rotatably connected to the grinding roller 2. A feed port connected to the feed hopper 11 is provided at the upper end of the grinding box 1. The rotating shaft 15 is rotatably connected to the feed port. A plurality of guide grooves 151 connected to the feed port are provided at the upper end of the rotating shaft 15, and a plurality of guide pipes 152 connected to the other end of the guide grooves 151 are provided on the side wall of the rotating shaft 15. The extending ends of the guide pipes 152 are respectively located at the front ends of the rotation direction of the grinding roller 2, and a fixedly connected shifting rod is provided in the feed port.

[0051] The design of the feed hopper 11, feed port, guide groove 151 and guide tube 152 can allow the NdFeB skin particles to enter the feed port through the feed hopper 11, and then be automatically laid in the grinding box 1 through the diversion of the guide groove 151 and the guide tube 152. This design can enable continuous grinding in the grinding box 1 to improve the overall efficiency. At the same time, the design of the lever, since the rotating shaft 15 is rotatable, the lever can automatically move the particles at the upper end of the rotating shaft 15 to the corresponding guide groove 151, effectively preventing the material from accumulating at the end of the rotating shaft 15.

[0052] In this example, see Figure 4 A conveying trough 362 for collecting materials is provided at the bottom of the separation trough 360, and a rotatable spiral conveying rod 361 is provided in the conveying trough 362. A discharge ring groove 13 is also provided in the grinding box 1, and a discharge port 12 connected to the discharge ring groove 13 is provided on one side of the grinding box 1. The discharge ring groove 13 is inclined as a whole, so that the material in the discharge ring groove 13 can automatically slide to the discharge port 12 by gravity. A discharge hopper 32 connected to the conveying trough 362 is provided on one side of the separation block 36, and the extending end of the discharge hopper 32 is located in the discharge ring groove 13.

[0053] In this example, see Figure 2 A plurality of fixedly connected positioning rods 31 are provided on the rotating shaft 15 , and a fixedly connected and U-shaped fixing frame 3 is provided at the end of the positioning rod 31 , and the fixing frame 3 is fixedly connected to the separation block 36 .

[0054] In this embodiment, a rotatable and inclined conveyor belt 33 is provided in the fixed frame 3 , and a plurality of fixedly connected and retractable material shifting plates 34 are provided on the conveyor belt 33 . The material shifting plates 34 are used to convey the materials to the separation screen 363 .

[0055] In this example, see Figure 2 , Figure 7A rotatably connected driving wheel 311 is provided on the positioning rod 31, and the driving wheel 311 is rollingly connected to the corresponding bottom, and a fixedly connected driving gear 312 is provided at one end of the driving wheel 311. Two rotatably connected first conveying wheels 35 are provided in the fixed frame 3, and a conveying gear 313 connected to one of the first conveying wheels 35 is provided on one side of the fixed frame 3, and the driving gear 312 is meshed with the conveying gear 313.

[0056] In this example, see Figure 2 , Figure 7 A first gear and a second gear 314 are also provided on the fixed frame 3. The first gear is connected to the spiral conveying rod 361. Two second conveying wheels 377 are rotatably connected. A fixed synchronous shaft 318 is provided in the middle of one of the second conveying wheels 377. A fixed first bevel gear 317 is provided at the end of the synchronous shaft 318. A meshing second bevel gear 316 is provided on the outer side of the first bevel gear 317. A fixed fixed shaft 315 is provided in the middle of the second bevel gear 316. 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 driving gear 312.

[0057] When using this application:

[0058] First, the material is fed into the feed hopper 11, and the material enters the guide groove 151 and the guide pipe 152 through the feed port, and then is laid in the grinding box 1 through the guide pipe 152. At the same time, the rotation of the rotating shaft 15 is controlled to drive the guide pipe 152 to lay the material in a ring shape. 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 extruded 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 the extruded material to the separation screen 363. The material automatically moves downward from the separation screen 363 due to gravity, and the particles that meet the size automatically fall into the separation groove 360 ​​for collection, and the larger particles automatically slide down and continue to be laid in the grinding box 1;

[0059] The material entering the separation screen 363 automatically falls into the conveying groove 362 due to gravity, and is automatically conveyed to the discharge hopper 32 as the spiral conveying rod 361 rotates, and then automatically falls into the discharge ring groove 13 by gravity, and is automatically discharged through the discharge port 12 by the inclination of the discharge ring groove 13. Such a design can realize extrusion and grinding, and can screen and replenish materials in time at the same time, thereby improving the overall extrusion and grinding efficiency, and also effectively preventing the material from being ground too small to cause waste.

[0060] Since the separation block 36 cannot scoop up all the material particles, some fine particles must pass through the bottom of the separation block 36, resulting in repeated grinding and squeezing of the fine particles, making the particles smaller and smaller, causing waste. When the fine particles move to the adsorption groove 37, the electrostatic adsorption plate 371 can adsorb the fine particles in time. With the rotation of the conveying ring 372, the electrostatic adsorption plate 371 adsorbed with fine particles can be conveyed to the upper end of the conveying ring 372. When the electrostatic adsorption plate 371 moves to the notch groove, since the end of the electrostatic adsorption plate 371 loses support, the electrostatic adsorption plate 371 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 makes the electrostatic adsorption plate 371 lose its static electricity source once it rotates, and 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, thereby 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 state to a horizontal state, and the end of the electrostatic adsorption plate 371 automatically moves into the guide ring groove 376, thereby realizing automatic charging of the electrostatic adsorption plate 371 for the next adsorption, thereby achieving continuous adsorption of fine particles.

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

[0063] A method for using a NdFeB material skin recycling device, using the NdFeB material skin recycling device, comprising the following steps:

[0064] S1 feeds the crushed NdFeB skin particles into the feed hopper 11, and the NdFeB skin particles are laid in the grinding box 1 in a ring shape through the feed hopper 11;

[0065] S2 then rotates the grinding roller 2, and the rotating grinding roller 2 extrudes and grinds the NdFeB skin particles;

[0066] After S3 grinding roller 2 is extruded, separation block 36 moves synchronously with grinding roller 2. Separation block 36 can scoop up the extruded NdFeB skin particles and transport them to separation screen 363. Separation screen 363 can timely screen and separate the particles that meet the size after extrusion. The screened particles automatically slide down with separation screen 363 and continue to be laid, waiting for the next grinding roller 2 to be extruded;

[0067] After the S4 separation block 36 scoops up and transports a portion of the NdFeB material skin particles, the remaining fine particles are promptly adsorbed by the electrostatic adsorption plate 371 when passing through the electrostatic adsorption plate 371, thereby preventing the fine particles from being excessively ground.

[0068] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for all purposes. The term "consisting essentially of..." to describe a combination should include the identified elements, ingredients, parts or steps and other elements, ingredients, parts or steps that do not substantially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe a combination of elements, ingredients, parts or steps herein also contemplates embodiments that consist essentially of these elements, ingredients, parts or steps. By using the term "may", it is intended to indicate that any attribute described that "may" include is optional.

[0069] Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "an" used to describe an element, ingredient, part or step is not intended to exclude other elements, ingredients, parts or steps.

[0070] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present application should not be determined with reference to the above description, but should be determined with reference to the appended claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of 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 to be a waiver of the subject matter, nor should it be considered that the inventors did not consider the subject matter to be part of the disclosed inventive subject matter.

Claims

1. A NdFeB material skin recovery and regeneration device, characterized in that: It comprises a grinding box, on which a feed hopper is provided, and inside of which a plurality of grinding rollers which are evenly distributed in an annular shape and can rotate are provided, wherein the grinding rollers are used for extruding and grinding the particles after the NdFeB material skin is crushed, and one side of the grinding rollers is provided with a separation mechanism which can move synchronously and is used for separating materials with set fineness, and the separation mechanism comprises a separation block, one end of which is inclined for scooping up materials, and an open separation trough is provided at the upper end of the separation block, a fixedly connected and inclined separation screen is provided at the inlet of the separation trough, and the bottom of the separation block is also provided with a plurality of electrostatic adsorption plates for adsorbing fine particles at the bottom of the separation block.

2. The NdFeB material skin recycling device according to claim 1, characterized in that: A rotatable conveying ring bar is provided at the bottom of the separation block, and the electrostatic adsorption plate is rotatably connected to the conveying ring bar. A guide ring plate is also provided at the bottom of the separation block, and a guide ring groove is provided on one side of the guide ring plate for sliding connection of the end of the electrostatic adsorption plate, and a notch groove is provided on the guide ring plate for the electrostatic adsorption plate to fall and separate, and a guide arc plate is provided on one side of the conveying ring bar for guiding the electrostatic adsorption plate into the guide ring groove after falling.

3. The NdFeB skin recycling device according to claim 2, characterized in that: An adsorption groove is provided at the bottom of the separation block, and two rotatable conveying plates for driving the conveying ring to rotate are provided on one side wall of the adsorption groove. The guide arc plate is fixedly connected to the side wall of the adsorption groove, and the guide ring plate is fixedly connected to the other side wall of the adsorption groove. An electrostatic generator is also provided in the grinding box, and a plurality of first joints are provided in the conveying ring. The electrostatic generator is electrically connected to the first joint, and a second joint is provided at the end of the electrostatic adsorption plate. When the electrostatic adsorption plate is located in the guide ring plate, the first joint is electrically connected to the second joint, and when the electrostatic adsorption plate is located at the notch, the first joint is separated from the second joint.

4. The NdFeB material skin recovery and regeneration device according to claim 2, characterized in that: The separation tank is provided with a collecting 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 collecting box, and the fine particles are separated in time through vibration. After the electrostatic adsorption plate contacts the collecting tank, the static electricity in the electrostatic adsorption plate is released.

5. The NdFeB skin recycling device according to claim 1, characterized in that: The grinding box is provided with an annular grinding ring groove, the grinding roller is arranged in the grinding ring groove, a rotatably connected rotating shaft is provided in the middle of the grinding box, a plurality of fixedly connected fixing rods are provided on the rotating shaft, the fixed rods are rotatably connected to the grinding roller, a feed port connected to the feed hopper is provided at the upper end of the grinding box, the rotating shaft is rotatably connected to the feed port, a plurality of guide grooves connected to the feed port are provided at the upper end of the rotating shaft, and a plurality of guide pipes connected to the other end of the guide grooves are provided on the side wall of the rotating shaft, the extending ends of the guide pipes are respectively located at the front ends of the rotation direction of the grinding roller, and a fixedly connected shifting rod is provided in the feed port.

6. The NdFeB skin recycling device according to claim 2, characterized in that: A conveying trough for collecting materials is provided at the bottom of the separation trough, a rotatable spiral conveying rod is provided in the conveying trough, a discharge ring groove is also provided in the grinding box, a discharge port connected to the discharge ring groove is provided on one side of the grinding box, and the discharge ring groove is inclined as a whole, so that the material in the discharge ring groove can automatically slide to the discharge port by gravity, and a discharge hopper connected to the conveying trough is provided on one side of the separation block, and the extension end of the discharge hopper is located in the discharge ring groove.

7. The NdFeB skin recycling device according to claim 5, characterized in that: A plurality of fixedly connected positioning rods are arranged on the rotating shaft, and a fixedly connected and U-shaped fixing frame is arranged at the end of the positioning rod, and the fixing frame is fixedly connected to the separation block.

8. The NdFeB skin recycling device according to claim 7, characterized in that: A rotatable and inclined conveyor belt is arranged in the fixed frame, and a plurality of fixedly connected and retractable material-diverting plates are arranged on the conveyor belt. The material-diverting plates are used to convey the materials to the separation screen.

9. The NdFeB material skin recovery and regeneration device according to claim 8, characterized in that: The positioning rod is provided with a rotatably connected driving wheel, the driving wheel is rollingly connected to the corresponding bottom, and one end of the driving wheel is provided with a fixedly connected driving gear, two rotatably connected first conveying wheels are provided in the fixed frame, and one side of the fixed frame is provided with a conveying gear connected to one of the first conveying wheels, and the driving gear is meshed with the conveying gear.

10. A method for using a NdFeB material skin recycling device, using the NdFeB material skin recycling device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1 feeds the crushed NdFeB skin particles into a feed hopper, and the NdFeB skin particles are laid in a ring shape in the grinding box through the feed hopper; S2 then rotates the grinding roller, and the rotating grinding roller extrudes and grinds the NdFeB skin particles; After the S3 grinding roller is extruded, the separation block moves synchronously with the grinding roller. The separation block can scoop up the extruded NdFeB material skin particles and transport them to the separation screen. The separation screen can timely screen and separate the particles that meet the size after extrusion. The screened particles automatically slide down with the separation screen and continue to be laid, waiting for the next grinding roller to be extruded; After the S4 separation block scoops up a part of the NdFeB material skin particles for transportation, the remaining fine particles are promptly adsorbed by the electrostatic adsorption plate when passing through the electrostatic adsorption plate to prevent the fine particles from being excessively ground.

Images