Cleaning and screening device for neodymium iron boron waste recovery

Abstract

The utility model discloses a cleaning and screening device for neodymium iron boron waste recovery, and relates to the technical field of neodymium iron boron waste recovery, the cleaning and screening device comprises a main body, one side of the main body is provided with a feed inlet, and the interior of the main body is rotatably connected with two first rotating shafts matched with each other at the feed inlet; the two first rotating shafts are both connected with a plurality of cutting blocks which do not interfere with each other, and a cleaning cylinder is installed on the portion, below the first rotating shafts, of the body. According to the neodymium-iron-boron waste cleaning device, cut neodymium-iron-boron waste falls onto the limiting rods in the cleaning cylinder, along with rotation of the second rotating shaft, cleaning liquid in the cleaning cylinder rotates, upward lifting force is generated due to spiral arrangement of the limiting rods, and at the moment, the neodymium-iron-boron waste continuously rolls and is cleaned in the cleaning cylinder; although the neodymium-iron-boron waste continuously descends under the influence of gravity, the process is very slow under the action of the lifting force, so that the neodymium-iron-boron waste has sufficient time to be cleaned, subsequent cleaning is not affected, and the occupied area is small.

Description

Technical Field

[0001] This utility model relates to the field of neodymium iron boron waste recycling technology, specifically a cleaning and screening device for neodymium iron boron waste recycling. Background Technology

[0002] Neodymium iron boron (NdFeB) is a high-performance rare-earth permanent magnet material, renowned for its extremely high magnetic energy product and coercivity, and widely used in various high-tech fields. The production process of NdFeB magnets generates a certain amount of waste, including fragments and dust produced during cutting and grinding. NdFeB magnets contain rare-earth elements, the mining and refining of which are complex and have a significant environmental impact. Therefore, recycling can conserve valuable rare-earth resources. The recycling process also generates economic benefits, as the rare-earth elements extracted from the waste can be reused to produce new magnets or other products. NdFeB waste reflects its importance in modern industry and the challenges it poses to sustainable development and environmental protection. With technological advancements and increased environmental awareness, the recycling of NdFeB waste is becoming increasingly important.

[0003] The cleaning and recycling method for NdFeB waste typically includes the following steps, aimed at removing oil, dust, and other impurities from the waste surface to facilitate subsequent recycling: Sorting: First, the NdFeB waste is sorted according to its size, shape, and degree of contamination; Demagnetization: If the waste contains magnetic impurities, a magnetic separator can be used for preliminary demagnetization to separate non-magnetic impurities; Soaking: The sorted waste is placed in a cleaning tank and soaked in water or a suitable cleaning agent to soften and dissolve surface oil and impurities; Mechanical Cleaning: The waste is rinsed using a high-pressure water gun, spray system, or ultrasonic cleaner to remove surface oil and dust; Magnetic Separation: After cleaning, the waste is subjected to a second magnetic separation using a magnetic separator to separate any non-magnetic impurities that may have been mixed in; Drying: Natural air drying or hot air drying.

[0004] Currently, most methods for cleaning and recycling NdFeB waste on the market rely on manual labor to assist machines. This method is very labor-intensive. Furthermore, the fully automatic cleaning and recycling devices on the market can only perform cleaning and recycling in batches, resulting in low efficiency. These devices also cannot effectively clean the impurities adhering to the NdFeB waste. In addition, drying the NdFeB waste after cleaning is also a problem. Natural air drying is too time-consuming, and hot air drying has low utilization rates, leading to unnecessary energy waste. Therefore, it is necessary to design a highly efficient and effective NdFeB waste cleaning and recycling device. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a cleaning and screening device for recycling neodymium iron boron waste, so as to solve the technical problems of poor efficiency and effect of traditional devices.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cleaning and screening device for recycling neodymium iron boron waste, comprising a main body, an inlet on one side of the main body, two mutually cooperating first rotating shafts rotatably connected inside the main body at the inlet, and several non-interfering cutting blocks connected to each of the two first rotating shafts, a cleaning cylinder installed below the first rotating shafts on the main body, a rotating motor installed inside the main body, and a second rotating shaft connected to the output end of the bottom surface of the rotating motor, the second rotating shaft being located inside the cleaning cylinder, and a spirally arranged limiting rod connected to the second rotating shaft.

[0007] By adopting the above technical solution, NdFeB waste is poured into the main body through the feeding port. At this time, the first rotating shaft drives the cutting block to rotate, cutting the NdFeB waste. This step reduces the volume of the NdFeB waste, which facilitates subsequent cleaning and processing. The cut NdFeB waste then falls onto the limiting rod inside the cleaning cylinder. As the second rotating shaft rotates, the cleaning fluid inside the cleaning cylinder rotates and generates an upward lifting force due to the spiral arrangement of the limiting rod. At this time, the NdFeB waste continuously tumbles and is cleaned inside the cleaning cylinder. Although the NdFeB waste is continuously falling due to gravity, this process is very slow under the lifting force generated by the cleaning fluid, allowing sufficient time for the NdFeB waste to be cleaned. This does not affect the subsequent cleaning of NdFeB waste and also occupies a small area.

[0008] The present invention is further configured such that an immersion zone is provided inside the main body below the cleaning cylinder, a conveyor belt is installed inside the main body, and the surface of the conveyor belt is provided with small holes, one end of the conveyor belt is located in the immersion zone, and the other end of the conveyor belt passes through a drying zone located inside the main body. The drying zone is positioned higher than the cleaning cylinder, and a hot air device is installed inside the main body above the drying zone, with the hot air outlet of the hot air device facing the conveyor belt.

[0009] By adopting the above technical solution, the cleaned NdFeB waste finally falls into the soaking zone. The conveyor belt carries the NdFeB waste away from the soaking zone and into the drying zone, where it is dried by a hot air device.

[0010] The present invention is further configured such that an air suction device is installed inside the main body below the drying zone, and the air suction port of the air suction device is located on the top surface of the air suction device. The output ends on both sides of the air suction device are connected to air ducts, and the ends of the two air ducts penetrate through the two side walls of the drying zone.

[0011] By adopting the above technical solution, the operation of the suction device drives the air circulation in the drying zone, thereby accelerating the drying efficiency of NdFeB waste. In addition, the gas ejected from the air duct interferes with the hot air trajectory of the hot air device, allowing the high-temperature airflow to blow towards the NdFeB waste from different directions, further accelerating the drying efficiency of the NdFeB waste.

[0012] The present invention is further configured such that water-absorbing filter material is installed inside both air ducts, and one end of the water-absorbing filter material extends through the corresponding air duct. The ends of the two water-absorbing filter materials extending through the air ducts are in contact with water-absorbing cotton located inside the main body, and the tops of the two water-absorbing cottons extend through the main body. A heating rod installed inside the main body extends through the upper part of the water-absorbing cotton. The water absorption rate of the water-absorbing cotton is greater than that of the water-absorbing filter material, and the water-absorbing cotton is a high-temperature resistant material.

[0013] By adopting the above technical solution, the moisture in the drying zone enters the air duct through the air suction device. At this time, the water-absorbing filter material located in the air duct absorbs the moisture, thereby reducing the moisture in the drying zone and accelerating the drying efficiency of the NdFeB waste. At this time, the water in the water-absorbing filter material is transferred to the water-absorbing cotton through contact. As the heating rod works, the moisture in the water-absorbing cotton is evaporated, the water-absorbing cotton is dried again, and continues to absorb the moisture in the water-absorbing filter material.

[0014] The present invention is further configured such that a crushing zone is provided inside the main body below the end of the conveyor belt, and two cooperating grinding wheels are installed inside the crushing zone of the main body.

[0015] By adopting the above technical solution, the dried NdFeB waste falls into the crushing zone under the traction of the conveyor belt. As the grinding wheel rotates, the NdFeB waste is crushed into slag, which facilitates subsequent processing and secondary utilization.

[0016] The present invention is further configured such that: a separation zone is provided inside the main body below the grinding wheel; a transfer track cooperating with the grinding wheel is installed inside the separation zone of the main body; a separation track is installed above the transfer track away from the grinding wheel inside the main body; a sludge box that slides into the main body is provided below the transfer track away from the grinding wheel; an electromagnet is installed inside the separation track, and the electromagnet is located at the end of the separation track close to the grinding wheel; a recycling box that slides into the main body is provided below the end of the separation track away from the grinding wheel.

[0017] By adopting the above technical solution, the crushed NdFeB waste falls onto the transfer belt in the separation zone. Under the action of the electromagnet, the NdFeB is attracted onto the separation belt. At this time, only impurities remain on the transfer belt. As the transfer belt rotates, the impurities eventually fall into the impurity box for further processing. Meanwhile, the NdFeB on the separation belt, after moving away from the coverage area of ​​the electromagnet, falls into the recycling box under the influence of gravity for further processing.

[0018] In summary, the present invention has the following main advantages:

[0019] This invention involves allowing cut NdFeB waste to fall onto a limiting rod inside a cleaning cylinder. As the second rotating shaft rotates, the cleaning fluid inside the cylinder rotates, and the spiral arrangement of the limiting rod generates an upward lifting force. The NdFeB waste continuously tumbles and is cleaned within the cylinder. Although the waste descends due to gravity, the lifting force from the cleaning fluid makes the process very slow, allowing ample time for cleaning without affecting subsequent cleaning. Furthermore, it requires a small footprint. The cleaned NdFeB waste is then dried using a hot air device in the drying zone. The operation of the suction device circulates air within the drying zone, and the water-absorbing filter absorbs moisture, accelerating the drying process. Attached Figure Description

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a side sectional view of the overall structure of this utility model;

[0022] Figure 3 This is a front sectional view of the overall structure of this utility model;

[0023] Figure 4 For the present utility model Figure 3 Enlarged view of the structure at point A in the middle.

[0024] In the diagram: 1. Main body; 2. Feed inlet; 3. Soaking zone; 4. Drying zone; 5. Crushing zone; 6. Separation zone; 7. First rotating shaft; 8. Second rotating shaft; 9. Cutting block; 10. Limiting rod; 11. Conveying track; 12. Transfer track; 13. Separating track; 14. Grinding wheel; 15. Hot air device; 16. Suction device; 17. Air duct; 18. Electromagnet; 19. Water-absorbing filter material; 20. Water-absorbing cotton; 21. Heating rod; 22. Impurity box; 23. Recycling box; 24. Washing cylinder. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0026] The embodiments of this utility model will be described below based on its overall structure.

[0027] A washing and screening device for recycling NdFeB waste, such as Figure 1-4 As shown, the device includes a main body 1, with a feed inlet 2 on one side. Inside the main body 1, two cooperating first rotating shafts 7 are rotatably connected at the feed inlet 2, and each of the two first rotating shafts 7 is connected to several non-interfering cutting blocks 9. A cleaning cylinder 24 is installed below the first rotating shafts 7 on the main body 1. A rotating motor is installed inside the main body 1, and the output end of the rotating motor is connected to a second rotating shaft 8, which is located inside the cleaning cylinder 24. A spirally arranged limiting rod 10 is connected to the second rotating shaft 8. When neodymium iron boron waste is poured into the interior of the main body 1 through the feed inlet 2, the first rotating shafts 7 drive the cutting blocks 9 to rotate, thus removing the neodymium iron boron waste. The material is cut, which reduces the volume of the NdFeB waste, making it easier for subsequent cleaning and processing. At this time, the cut NdFeB waste falls onto the limiting rod 10 inside the cleaning cylinder 24. As the second rotating shaft 8 rotates, the cleaning fluid inside the cleaning cylinder 24 rotates and generates an upward lifting force due to the spiral arrangement of the limiting rod 10. At this time, the NdFeB waste is constantly tumbling and cleaning inside the cleaning cylinder 24. Although the NdFeB waste is constantly falling due to gravity, this process is very slow under the lifting force generated by the cleaning fluid, allowing the NdFeB waste sufficient time to be cleaned without affecting the subsequent cleaning of NdFeB waste, and it occupies a small area.

[0028] The main body 1 has an immersion zone 3 located below the cleaning cylinder 24. A conveyor belt 11 is installed inside the main body 1, and the surface of the conveyor belt 11 has small holes. One end of the conveyor belt 11 is located in the immersion zone 3, and the other end of the conveyor belt 11 passes through a drying zone 4 located inside the main body 1. The drying zone 4 is higher than the cleaning cylinder 24. A hot air device 15 is installed inside the main body 1 above the drying zone 4, and the hot air outlet of the hot air device 15 faces the conveyor belt 11. The cleaned NdFeB waste finally falls into the immersion zone 3. The conveyor belt 11 operates to carry the NdFeB waste away from the immersion zone 3 and into the drying zone 4, where the NdFeB waste is dried by the hot air device 15.

[0029] An air suction device 16 is installed inside the main body 1 below the drying zone 4, and the air intake of the air suction device 16 is located on the top surface of the air suction device 16. The output ends on both sides of the air suction device 16 are connected to air ducts 17, and the ends of the two air ducts 17 penetrate through the two side walls of the drying zone 4. The operation of the air suction device 16 drives the air circulation in the drying zone 4, thereby accelerating the drying efficiency of the NdFeB waste. In addition, the gas ejected from the air ducts 17 interferes with the hot air trajectory of the hot air device 15, so that the high temperature airflow can be blown towards the NdFeB waste from different directions, further accelerating the drying efficiency of the NdFeB waste.

[0030] Both air ducts 17 are equipped with water-absorbing filter media 19, with one end of the filter media 19 extending through the corresponding air duct 17. The ends of the two filter media 19 extending through the air ducts 17 are in contact with water-absorbing cotton 20 located inside the main body 1, and the tops of the two water-absorbing cotton 20 extend through the main body 1. A heating rod 21 installed inside the main body 1 extends through the upper part of the water-absorbing cotton 20. The water absorption rate of the water-absorbing cotton 20 is greater than that of the filter media 19. The water-absorbing cotton 20 is a high-temperature resistant material. The moisture in the drying zone 4 enters the air duct 17 with the air suction device 16. At this time, the water-absorbing filter media 19 located in the air duct 17 absorbs the moisture, thereby reducing the moisture in the drying zone 4 and accelerating the drying efficiency of the NdFeB waste. At this time, the water in the filter media 19 is transferred to the water-absorbing cotton 20 through contact. With the operation of the heating rod 21, the moisture in the water-absorbing cotton 20 is evaporated, and the water-absorbing cotton 20 is dried again and continues to absorb the moisture in the filter media 19.

[0031] Inside the main body 1, below the end of the conveyor belt 11, there is a crushing zone 5. Inside the crushing zone 5, there are two cooperating grinding wheels 14. After drying, the NdFeB waste falls into the crushing zone 5 under the traction of the conveyor belt 11. As the grinding wheels 14 rotate, the NdFeB waste is crushed into slag, which facilitates subsequent processing and secondary utilization.

[0032] Inside the main body 1, below the grinding wheel 14, there is a separation zone 6. Inside the separation zone 6, a transfer track 12 that cooperates with the grinding wheel 14 is installed. Inside the main body 1, above the transfer track 12 away from the grinding wheel 14, a separation track 13 is installed. Below the transfer track 12 away from the grinding wheel 14, there is a slidable impurity box 22 inserted into the main body 1. An electromagnet 18 is installed inside the separation track 13, and the electromagnet is located at the end of the separation track 13 closest to the grinding wheel 14. A recycling bin 23 is provided at one end of the main body 1 for sliding insertion. The crushed NdFeB waste falls onto the transfer belt 12 of the separation zone 6. Under the action of the electromagnet 18, the NdFeB is attracted onto the separation belt 13. At this time, only impurities remain on the transfer belt 12. As the transfer belt 12 rotates, the impurities eventually fall into the impurity bin 22 for further processing. The NdFeB on the separation belt 13, after moving away from the coverage area of ​​the electromagnet 18, falls into the recycling bin 23 under the influence of gravity for further processing.

[0033] Working principle: Neodymium iron boron (NdFeB) waste is poured into the main body 1 through the feed inlet 2. At this time, the first rotating shaft 7 drives the cutting block 9 to rotate, cutting the NdFeB waste. This step reduces the volume of the NdFeB waste, facilitating subsequent cleaning and processing. The cut NdFeB waste then falls onto the limiting rod 10 inside the cleaning cylinder 24. As the second rotating shaft 8 rotates, the cleaning fluid inside the cleaning cylinder 24 rotates, and the spiral arrangement of the limiting rod 10 generates an upward lifting force. At this time, the NdFeB waste continuously tumbles and is cleaned inside the cleaning cylinder 24. Although the NdFeB waste continuously descends due to gravity, it is continuously cleaned by the cleaning fluid. The lifting force makes this process very slow, allowing ample time for the NdFeB waste to be cleaned without affecting subsequent cleaning. It also requires less space. The cleaned NdFeB waste eventually falls into the soaking zone 3. The conveyor belt 11 then carries the NdFeB waste away from the soaking zone 3 and into the drying zone 4. The waste is then dried by the hot air device 15 within the drying zone 4. The operation of the suction device 16 promotes air circulation within the drying zone 4, thereby accelerating the drying efficiency. Furthermore, the gas ejected from the air duct 17 interferes with the hot air trajectory of the hot air device 15, making... High-temperature airflow can be blown towards the NdFeB waste from different directions, further accelerating the drying efficiency of the NdFeB waste. In addition, the moisture in the drying zone 4 enters the air duct 17 through the suction device 16. At this time, the water-absorbing filter material 19 located in the air duct 17 absorbs the moisture, thereby reducing the moisture in the drying zone 4 and accelerating the drying efficiency of the NdFeB waste. Meanwhile, the water in the water-absorbing filter material 19 is transferred to the absorbent cotton 20 through contact. With the operation of the heating rod 21, the moisture in the absorbent cotton 20 is evaporated, and the absorbent cotton 20 is re-dried, continuing to absorb moisture from the absorbent filter material 19. After drying, the NdFeB waste is then transported... Pulled by the track 11, the neodymium iron boron waste falls into the crushing zone 5. As the grinding wheel 14 rotates, the neodymium iron boron waste is crushed into slag, which facilitates subsequent processing and secondary utilization. The crushed neodymium iron boron waste falls onto the transfer track 12 of the separation zone 6. Under the action of the electromagnet 18, the neodymium iron boron is attracted to the separation track 13. At this time, only impurities remain on the transfer track 12. As the transfer track 12 rotates, the impurities eventually fall into the impurity box 22, waiting for further processing. The neodymium iron boron on the separation track 13, after moving away from the coverage area of ​​the electromagnet 18, falls into the recycling box 23 under the influence of gravity, waiting for further processing.

[0034] Based on the above structure, although embodiments of the present utility model have been shown and described in this embodiment, these specific embodiments are merely explanations of the present utility model and are not intended to limit the utility model. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present utility model, but such modifications, substitutions, and variations are protected by patent law as long as they fall within the scope of the claims of the present utility model.

Claims

1. A cleaning and screening device for recycling NdFeB waste, comprising a main body (1), characterized in that: A feed inlet (2) is provided on one side of the main body (1). Two first rotating shafts (7) are rotatably connected to the feed inlet (2) inside the main body (1). Several non-interfering cutting blocks (9) are connected to both first rotating shafts (7). A cleaning cylinder (24) is installed below the first rotating shafts (7) in the main body (1). A rotating motor is installed inside the main body (1). A second rotating shaft (8) is connected to the output end of the bottom surface of the rotating motor. The second rotating shaft (8) is located inside the cleaning cylinder (24). A spirally arranged limiting rod (10) is connected to the second rotating shaft (8).

2. The washing and screening device for recycling NdFeB waste according to claim 1, characterized in that: The main body (1) has an immersion zone (3) located below the cleaning cylinder (24) inside. The main body (1) is equipped with a conveyor belt (11), and the surface of the conveyor belt (11) is provided with small holes. One end of the conveyor belt (11) is located in the immersion zone (3), and the other end of the conveyor belt (11) passes through a drying zone (4) located inside the main body (1). The drying zone (4) is located higher than the cleaning cylinder (24).

3. The washing and screening device for recycling NdFeB waste according to claim 2, characterized in that: The interior of the main body (1) is equipped with a hot air device (15) located above the drying zone (4), and the hot air outlet of the hot air device (15) faces the conveyor belt (11).

4. The washing and screening device for recycling NdFeB waste according to claim 2, characterized in that: An air suction device (16) is installed inside the main body (1) below the drying area (4), and the air intake of the air suction device (16) is located on the top surface of the air suction device (16). The output ends on both sides of the air suction device (16) are connected to air ducts (17), and the ends of the two air ducts (17) penetrate through the two side walls of the drying area (4).

5. The cleaning and screening device for recycling NdFeB waste according to claim 4, characterized in that: Both air ducts (17) are equipped with water-absorbing filter material (19), and one end of the water-absorbing filter material (19) extends through the corresponding air duct (17). The ends of the two water-absorbing filter materials (19) extending through the air ducts (17) are in contact with water-absorbing cotton (20) located inside the main body (1), and the tops of the two water-absorbing cotton (20) extend through the main body (1). A heating rod (21) installed inside the main body (1) extends through the upper part of the water-absorbing cotton (20).

6. The washing and screening device for recycling NdFeB waste according to claim 5, characterized in that: The absorbent cotton (20) has a higher water absorption rate than the absorbent filter material (19), and the absorbent cotton (20) is a high-temperature resistant material.

7. The cleaning and screening device for recycling NdFeB waste according to claim 2, characterized in that: The main body (1) has a crushing zone (5) located below the end of the conveyor belt (11) inside, and two cooperating grinding wheels (14) are installed inside the crushing zone (5) of the main body (1).

8. The cleaning and screening device for recycling NdFeB waste according to claim 7, characterized in that: Inside the main body (1), below the grinding wheel (14), there is a separation zone (6). Inside the separation zone (6), there is a transmission track (12) that cooperates with the grinding wheel (14). Inside the main body (1), above the transmission track (12) away from the grinding wheel (14), there is a separation track (13). Below the transmission track (12) away from the grinding wheel (14), there is a slurry box (22) that is slidably inserted into the main body (1). Inside the separation track (13), there is an electromagnet (18), and the electromagnet is located at the end of the separation track (13) near the grinding wheel (14). Below the end of the separation track (13) away from the grinding wheel (14), there is a recycling box (23) that is slidably inserted into the main body (1).

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