A device for recovering rare earth from NdFeB waste

Abstract

The utility model discloses a device for recycling rare earths from NdFeB waste, and relates to the technical field of rare earth recycling and utilization, including a recycling box, a de-impurity box fixedly arranged below the feed port, a de-impurity mechanism arranged in the de-impurity box, and the de-impurity mechanism comprising a sieve plate; a liquid inlet is connected above the liquid inlet, and the liquid inlet realizes the injection of quantitative hydrochloric acid into the recycling box through a quantitative liquid inlet mechanism; the quantitative liquid inlet mechanism comprises a first baffle, a screw and a movable block. The utility model arranges a de-impurity box in the recycling box, and then realizes the de-impurity of the NdFeB waste before being dissolved by concentrated hydrochloric acid, so as not to affect the effect of subsequent dissolution. At the same time, the utility model cooperates with the first baffle, the movable block, the threaded hole, the screw and the connecting rod, that is, the movable block is driven to move by the rotation of the screw, and then the first baffle is moved up and down in the liquid inlet cylinder through the connection of the connecting rod, so that the space in the liquid inlet cylinder can be adjusted, thereby realizing the quantitative injection of concentrated hydrochloric acid in the liquid inlet cylinder into the recycling box.

Description

Technical Field

[0001] The utility model relates to the technical field of rare earth recycling, in particular to a device for recycling rare earth from NdFeB waste. Background Art

[0002] As a kind of rare earth permanent magnet material, NdFeB has extremely high magnetic energy product and coercive force. As the latest result of the development of rare earth permanent magnet materials, it is called "King of Magnets" due to its excellent magnetic properties. At the same time, the advantage of high energy density makes NdFeB permanent magnet materials widely used in modern industry and electronic technology, making it possible to miniaturize, lighten and thin the equipment such as instruments, electroacoustic motors, magnetic separation and magnetization. In the production process of NdFeB, from the pretreatment of raw materials to the final product testing, each process inevitably produces waste, and the waste generated needs to be recycled in time.

[0003] The existing process for recycling rare earths from NdFeB waste is to put a certain amount of concentrated hydrochloric acid and NdFeB waste into a recovery device, dissolve the NdFeB waste, and make all rare earth elements and iron elements dissolve and convert into ionic state. Since NdFeB waste contains many impurity particles, it should be firstly impurity-removed when dissolved by concentrated hydrochloric acid, but the existing rare earth recovery device is not provided with an impurity-removing device, which affects the effect of recovery. In addition, the existing method of adding concentrated hydrochloric acid to the recovery box is to directly add it directly through the liquid inlet in the recovery box, but this feeding method does not know how much concentrated hydrochloric acid is added, which usually causes more or less concentrated hydrochloric acid to be added, affecting the dissolution of NdFeB waste, thereby affecting the effect of recovering rare earths from NdFeB waste. Utility Model Content

[0004] In order to solve the problems of the prior art, the utility model provides a device for recovering rare earth from NdFeB waste, comprising a recovery box, the top of which is provided with a feed inlet for feeding NdFeB waste and a liquid inlet for adding concentrated hydrochloric acid solution;

[0005] A de-impurity box is fixedly arranged below the feed port and inside the recycling box, and the feed port is communicated with the interior of the de-impurity box; a de-impurity mechanism is arranged in the de-impurity box, and the de-impurity mechanism includes a sieve plate, a rotating shaft is rotatably mounted on the sieve plate, a connecting spring is fixedly connected to the top of one side of the sieve plate, a connecting block is fixedly connected to the top of the connecting spring, and one end of the connecting block is fixedly connected to the inner wall of the de-impurity box; the sieve plate removes impurities from the raw materials through a shaking mechanism; a discharge port is arranged below one side of the de-impurity box, and the discharge port is communicated with the interior of the recycling box;

[0006] The liquid inlet is connected to a liquid inlet cylinder above the liquid inlet, and the liquid inlet cylinder injects a quantitative amount of hydrochloric acid into the recovery box through a quantitative liquid inlet mechanism;

[0007] The quantitative liquid inlet mechanism comprises a first baffle, a screw rod and a movable block, wherein the first baffle is slidably connected to the inner wall of the liquid inlet cylinder, the screw rod is arranged on the top of the recovery box, and the screw rod is fixedly connected to the power output shaft of the first drive motor;

[0008] The movable block is provided with a through hole which vertically passes through the movable block, the inner wall of the through hole is provided with an internal thread, the screw rod passes through the through hole, and the external thread on the outer surface of the screw rod matches the internal thread on the inner wall of the through hole, and the movable block is connected to the first baffle through a connecting rod.

[0009] A further solution is that the shaking mechanism includes a second driving motor and a sliding sleeve, the power output shaft of the second driving motor is connected to the driving shaft through a coupling, the end of the driving shaft is fixedly connected with a cam, the sliding sleeve is slidably connected with a sliding rod, the bottom of the sliding rod is fixedly connected with a force block, and the sliding rod is sleeved with a sleeve spring; the top of the sliding rod is an arc-shaped structure, and the top of the sliding rod is in contact with the bottom of the screen plate.

[0010] A further solution is that a debris discharge port is opened on one side surface of the debris removal box, the sieve plate is rotatably mounted on the inner wall of the debris discharge port via the rotating shaft, and the end of the debris discharge port extends to the outside of the recovery box.

[0011] A further solution is that a material guide block is fixedly provided on the inner bottom of the impurity removal box, the material guide block is provided with an inclined surface, and one end of the material guide block extends to the discharge port.

[0012] A further solution is that a movable hole is opened at the top of the recovery box, and the outer wall of the connecting rod is movably connected with the inner wall of the movable hole.

[0013] A further solution is that a rubber ring is sleeved on the outer wall of the first baffle, and the outer wall of the rubber ring is arranged in an interference fit with the inner wall of the liquid inlet cylinder.

[0014] A further solution is that a feed hopper is provided above the feed port, a feed barrel is fixedly connected below the feed hopper, the interior of the feed hopper is connected to the interior of the feed barrel, and the interior of the feed barrel is connected to the interior of the impurity removal box;

[0015] A matching second baffle is provided inside the feed barrel, an elastic plate is provided on one side of the second baffle, a rotating shaft is provided at both ends of the second baffle, a bearing matching the rotating shaft is provided inside the feed barrel, a plurality of fixed blocks are provided at the bottom of the second baffle and inside the feed barrel, and a plurality of reset springs are provided between the second baffle and the feed barrel;

[0016] A further solution is that the number of the second baffle plates and the number of the elastic plates are both set to two, and the elastic plates are fixedly connected to the second baffle plates.

[0017] A further solution is that the number of the rotating shafts and bearings are set to be several groups, and the second baffle is rotatably connected to the feed barrel through the rotating shafts and bearings.

[0018] A further solution is that the return spring is detachably connected to the fixing block via a through hole;

[0019] The number of the return springs is set to four groups, the number of the fixed blocks is set to eight groups, and the second baffle is elastically connected to the feed barrel via the return spring.

[0020] Beneficial effects of the utility model:

[0021] The utility model arranges an impurity removal box in the recycling box, thereby removing impurities from the NdFeB waste before it is dissolved by concentrated hydrochloric acid, so as to avoid affecting the effect of subsequent dissolution.

[0022] The utility model cooperates with the first baffle plate, the movable block, the threaded hole, the screw rod and the connecting rod, that is, the movable block is driven to move by the rotation of the screw rod, and then the first baffle plate is moved up and down in the liquid inlet cylinder through the connection of the connecting rod, so that the space in the liquid inlet cylinder can be adjusted, thereby realizing the quantitative injection of concentrated hydrochloric acid in the liquid inlet cylinder into the recovery box. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of a device for recovering rare earth from NdFeB waste provided in an embodiment of the utility model;

[0024] Figure 2 A schematic diagram of the structure of the interior of the impurity removal box provided by an embodiment of the utility model;

[0025] Figure 3 A schematic diagram of the structure of a quantitative liquid inlet mechanism provided in an embodiment of the utility model;

[0026] Figure 4 A schematic diagram of the front view of the interior of the feed hopper and feed barrel provided in an embodiment of the utility model;

[0027] Figure 5 for Figure 4 Side view of

[0028] Figure 6 for Figure 4 A top view of

[0029] The attached drawings are marked as follows: 1-recovery box; 10-movable hole; 2-impurity removal box; 20-sieve plate; 21-rotating shaft; 22-connecting spring; 23-connecting block; 24-discharge port; 25-impurity discharge port; 26-guiding block; 30-liquid inlet cylinder; 31-first baffle; 32-screw rod; 33-movable block; 34-first drive motor; 35-connecting rod; 36-rubber ring; 40-second drive motor; 41-sliding sleeve; 42-drive shaft; 43-cam; 44-force block; 45-sleeve spring; 46-slide rod; 5-feed hopper; 51-feed cylinder; 52-second baffle; 53-elastic plate; 54-rotating shaft; 55-bearing; 56-fixed block; 57-reset spring. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0031] like Figure 1-6 As shown, one embodiment of the utility model discloses a device for recovering rare earth from NdFeB waste, comprising a recovery box 1, the top of which is provided with a feed port for feeding NdFeB waste and a liquid inlet for adding concentrated hydrochloric acid solution;

[0032] The above-mentioned configuration of this embodiment can realize that NdFeB waste can be added to the recovery box through the feed port and concentrated hydrochloric acid can be added to the recovery box through the liquid inlet, so that the NdFeB waste and concentrated hydrochloric acid react in the recovery box, so that the rare earth elements and iron elements are completely dissolved and converted into ionic state. This is an existing conventional technical means for recycling rare earths from NdFeB waste, and this embodiment does not elaborate on its principle and implementation process.

[0033] Since NdFeB waste contains many impurities, it should be cleaned before being dissolved by concentrated hydrochloric acid. However, the existing rare earth recovery devices are not equipped with a cleaning device, which affects the recovery effect. Therefore, in this embodiment, a cleaning box is set in the recovery box, specifically, a cleaning box 2 is fixedly set below the feed port and located inside the recovery box 1, and the feed port is connected to the inside of the cleaning box 2; a cleaning mechanism is set in the cleaning box 2, and the cleaning mechanism includes a sieve plate 20, and a rotating shaft 21 is rotatably mounted on the sieve plate 20, and a connecting spring 22 is fixedly connected to the top of one side of the sieve plate 20, and a connecting block 23 is fixedly connected to the top of the connecting spring 22, and one end of the connecting block 23 is fixedly connected to the inner wall of the cleaning box 2; the sieve The plate 20 removes impurities from the raw material through a shaking mechanism; the shaking mechanism includes a second drive motor 40 and a sleeve 41, the power output shaft of the second drive motor 40 is connected to the drive shaft 42 through a coupling, a cam 43 is fixedly connected to the end of the drive shaft 42, a slide rod 46 is slidably connected to the sleeve 41, a force block 44 is fixedly connected to the bottom of the slide rod 46, and a sleeve spring 45 is sleeved on the slide rod 46; the top of the slide rod 46 is an arc structure, and the top of the slide rod 46 contacts the bottom of the screen plate 20. The slide rod is set as an arc structure so that the top of the slide rod can abut against the bottom of the screen plate.

[0034] Through the above-mentioned arrangement, the present embodiment can realize that after the NdFeB waste enters the impurity removal box, the NdFeB waste falls onto the screen plate, and the second drive motor can be started. The power output shaft of the second drive motor rotates to drive the drive shaft to rotate, and the rotation of the drive shaft drives the cam to rotate, so that the cam squeezes the force block with different radii, and then the screen plate can be squeezed through the top of the slide rod, and under the elastic force of the connecting spring, the screen plate is continuously shaken around the rotating shaft, so that the NdFeB waste is screened through the screen plate, so that impurities with larger particle sizes in the NdFeB waste are retained on the screen plate, and the NdFeB waste after the impurities are removed passes through the screen plate and falls to the bottom of the impurity removal box, thereby realizing the screening of impurities and NdFeB waste, and then removing the impurities in the NdFeB waste.

[0035] In this embodiment, a debris discharge port 25 is opened on one side of the debris removal box 2, and the sieve plate 20 is rotatably mounted on the inner wall of the debris discharge port 25 via a rotating shaft 21, and the end of the debris discharge port 25 extends to the outside of the recovery box 1.

[0036] The above-mentioned arrangement of this embodiment can realize that by setting the impurity discharge port, the sieved impurity particles can be discharged from the impurity removal box and the recovery box through the impurity discharge port.

[0037] In this embodiment, a discharge port 24 is provided at the lower side of the impurity removal box 2, and the discharge port 24 is connected to the interior of the recovery box 1; a guide block 26 is fixedly provided at the inner bottom of the impurity removal box 2, the guide block 26 is provided with an inclined surface, and one end of the guide block 26 extends to the discharge port 24.

[0038] Through the above arrangement, the present embodiment can achieve that the NdFeB waste after impurity removal falls onto the guide block and slides along the inclined surface of the guide block to the discharge port of the impurity removal box and is discharged from the discharge port to the bottom of the recovery box.

[0039] A liquid inlet cylinder 30 is connected above the liquid inlet port, and a scale line from top to bottom is arranged on the outer surface of the liquid inlet cylinder 30. The liquid inlet cylinder 30 realizes the injection of a certain amount of hydrochloric acid into the recovery box 1 through a quantitative liquid inlet mechanism; the quantitative liquid inlet mechanism includes a first baffle 31, a screw rod 32 and a movable block 33, the first baffle 31 is slidably connected to the inner wall of the liquid inlet cylinder 30, the screw rod 32 is arranged on the top of the recovery box 1, and the screw rod 32 is fixedly connected to the power output shaft of the first drive motor 34; the movable block 33 is provided with a through hole that vertically penetrates the movable block 33, the inner wall of the through hole is provided with an internal thread, the screw rod 32 passes through the through hole, and the external thread on the outer surface of the screw rod 32 matches the internal thread on the inner wall of the through hole, and the movable block 33 is connected to the first baffle 31 through a connecting rod 35.

[0040] The present embodiment is arranged as above, when it is necessary to add a certain amount of concentrated hydrochloric acid into the recovery box through the liquid inlet cylinder, the first baffle is initially located inside the liquid inlet cylinder, at this time, a certain amount of concentrated hydrochloric acid is injected into the liquid inlet cylinder according to the scale line on the outer wall of the liquid inlet cylinder, after the injection is completed, the first drive motor is started again to make its power output shaft rotate forward, so that the movable block moves vertically upward, thereby driving the first baffle to move vertically downward, until the first baffle is separated from the liquid inlet cylinder and enters the recovery box, the first drive motor is turned off, and the concentrated hydrochloric acid in the liquid inlet cylinder can enter the recovery box at this time, when the liquid level in the liquid inlet cylinder drops to a certain height, the first drive motor is restarted again to reverse its power output shaft, so that the movable block moves vertically downward, thereby driving the first baffle to move vertically upward, until the first baffle enters the inside of the liquid inlet cylinder, the concentrated hydrochloric acid in the liquid inlet cylinder no longer enters the recovery box from the liquid inlet cylinder, thereby realizing the addition of a certain amount of concentrated hydrochloric acid into the recovery box.

[0041] In this embodiment, a movable hole 10 is opened at the top of the recovery box 1 , and the outer wall of the connecting rod 35 is movably connected with the inner wall of the movable hole 10 .

[0042] Through the above arrangement, this embodiment can realize that the connecting rod passes through the movable hole, so that the movement of the movable block can drive the first baffle to move stably.

[0043] In this embodiment, a rubber ring 36 is sleeved on the outer wall of the first baffle 31 , and the outer wall of the rubber ring 36 is arranged in an interference fit with the inner wall of the liquid inlet cylinder 30 .

[0044] Through the above arrangement, this embodiment can achieve sealing between the first baffle and the feed cylinder by setting a rubber ring, thereby preventing the concentrated hydrochloric acid injected into the liquid feed cylinder from flowing down the gap between the first baffle and the liquid feed cylinder, thereby ensuring the accuracy of quantitative addition of quantitative concentrated hydrochloric acid.

[0045] In this embodiment, a feed hopper 5 is arranged above the feed port, a feed barrel 51 is fixedly connected below the feed hopper 5, the interior of the feed hopper 5 is connected to the interior of the feed barrel 51, and the interior of the feed barrel 51 is connected to the interior of the impurity removal box 2; a matching second baffle 52 is arranged inside the feed barrel 51, an elastic plate 53 is arranged on one side of the second baffle 52, a rotating shaft 54 ​​is arranged at both ends of the second baffle 52, a bearing 55 matching the rotating shaft 54 ​​is arranged inside the feed barrel 51, a plurality of fixed blocks 56 are arranged at the bottom of the second baffle 52 and the interior of the feed barrel 51, and a plurality of reset springs 57 are arranged between the second baffle 52 and the feed barrel 51;

[0046] When NdFeB waste is put into the impurity removal box, since the NdFeB waste has been crushed and is in powder form and contains dust, a large amount of dust will inevitably be generated when the NdFeB waste falls from the feed port and is easy to scatter everywhere. When it comes into contact with the device operator, it will also cause various diseases, which is highly harmful. This embodiment can realize the process of NdFeB waste falling through the feed port through the above-mentioned setting. Since the second baffle is rotatably connected to the feed barrel through the rotating shaft and the bearing, and the second baffle is elastically connected to the straight barrel through the return spring, the second baffle will tilt downward due to the gravity of the NdFeB waste. When the gravity of the NdFeB waste disappears, under the action of the return spring, the second baffle returns to its original state, thereby preventing the NdFeB waste from generating a large amount of dust during feeding and scattering into the external air, effectively improving the working environment, and preventing dust from affecting the health of the operator. The setting of the elastic plate plays a role in protecting the second baffle, saving costs.

[0047] In this embodiment, the number of the second baffle plates 52 and the number of the elastic plates 53 are both set to two, and the elastic plates 53 are fixedly connected to the second baffle plates 52 .

[0048] Through the above arrangement, this embodiment can protect the second baffle through the elastic plate, thus saving costs.

[0049] In this embodiment, the number of the rotating shafts 54 and the bearings 55 are set to be a plurality of groups, and the second baffle 52 is rotatably connected to the feed barrel 51 through the rotating shafts 54 and the bearings 55 .

[0050] This embodiment can prevent the dust contained in the NdFeB waste from being easily scattered when feeding by arranging the rotating shaft, the bearing and the second baffle.

[0051] In this embodiment, the return spring 57 is detachably connected to the fixing block 56 via a through hole.

[0052] This embodiment facilitates installation and disassembly of the return spring through the above arrangement.

[0053] In this embodiment, the number of the return springs 57 is set to four groups, the number of the fixing blocks 56 is set to eight groups, and the second baffle 52 is elastically connected to the feed barrel 51 through the return springs 57 .

[0054] In this embodiment, the second baffle can be automatically reset by providing a reset spring.

[0055] Finally, it should be noted that the above only describes in detail the specific embodiments of the utility model. However, the utility model is not limited to the specific embodiments described above. Equivalent modifications and substitutions made by technicians in this field to the utility model are also within the scope of the utility model. Therefore, equal changes and modifications made without departing from the spirit and scope of the utility model are all included in the scope of the utility model.

Claims

1. A device for recovering rare earth from NdFeB waste, comprising a recovery box (1), characterized in that: The top of the recovery box (1) is provided with a feed inlet for feeding NdFeB waste material and a liquid inlet for adding concentrated hydrochloric acid solution; A de-impurity box (2) is fixedly arranged below the feed port and inside the recycling box (1), and the feed port is communicated with the inside of the de-impurity box (2); a de-impurity mechanism is arranged in the de-impurity box (2), and the de-impurity mechanism comprises a sieve plate (20), a rotating shaft (21) is rotatably mounted on the sieve plate (20), a connecting spring (22) is fixedly connected to the top of one side of the sieve plate (20), a connecting block (23) is fixedly connected to the top of the connecting spring (22), and one end of the connecting block (23) is fixedly connected to the inner wall of the de-impurity box (2); the sieve plate (20) removes impurities from the raw material through a shaking mechanism; a discharge port (24) is arranged below one side of the de-impurity box (2), and the discharge port (24) is communicated with the inside of the recycling box (1); A liquid inlet cylinder (30) is connected above the liquid inlet, and the liquid inlet cylinder (30) injects a quantitative amount of hydrochloric acid into the recovery box (1) through a quantitative liquid inlet mechanism; The quantitative liquid inlet mechanism comprises a first baffle (31), a screw rod (32) and a movable block (33), wherein the first baffle (31) is slidably connected to the inner wall of the liquid inlet cylinder (30), the screw rod (32) is arranged on the top of the recovery box (1), and the screw rod (32) is fixedly connected to the power output shaft of the first drive motor (34); The movable block (33) is provided with a through hole which vertically passes through the movable block (33); the inner wall of the through hole is provided with an internal thread; the screw rod (32) passes through the through hole; the external thread on the outer surface of the screw rod (32) matches the internal thread on the inner wall of the through hole; the movable block (33) is connected to the first baffle (31) via a connecting rod (35).

2. A device for recovering rare earth from NdFeB waste according to claim 1, characterized in that: The shaking mechanism comprises a second driving motor (40) and a sliding sleeve (41); the power output shaft of the second driving motor (40) is connected to the driving shaft (42) through a coupling; the end of the driving shaft (42) is fixedly connected to a cam (43); the sliding sleeve (41) is slidably connected to a sliding rod (46); the bottom of the sliding rod (46) is fixedly connected to a force block (44); a sleeve spring (45) is sleeved on the sliding rod (46); the top of the sliding rod (46) is an arc-shaped structure, and the top of the sliding rod (46) is in contact with the bottom of the screen plate (20).

3. The device for recovering rare earth from NdFeB waste according to claim 1, characterized in that: A debris discharge opening (25) is provided on one side surface of the debris removal box (2), and the sieve plate (20) is rotatably mounted on the inner wall of the debris discharge opening (25) via the rotating shaft (21), and the end of the debris discharge opening (25) extends to the outside of the recovery box (1).

4. The device for recovering rare earth from NdFeB waste according to claim 1, characterized in that: A material guide block (26) is fixedly provided on the inner bottom of the impurity removal box (2), the material guide block (26) is provided with an inclined surface, and one end of the material guide block (26) extends to the discharge port (24).

5. The device for recovering rare earth from NdFeB waste according to claim 1, characterized in that: A movable hole (10) is provided at the top of the recovery box (1), and the outer wall of the connecting rod (35) is movably connected to the inner wall of the movable hole (10).

6. The device for recovering rare earth from NdFeB waste according to claim 1, characterized in that: The outer wall of the first baffle (31) is sleeved with a rubber ring (36), and the outer wall of the rubber ring (36) is arranged in an interference fit with the inner wall of the liquid inlet cylinder (30).

7. The device for recovering rare earth from NdFeB waste according to claim 1, characterized in that: A feed hopper (5) is arranged above the feed port, a feed barrel (51) is fixedly connected below the feed hopper (5), the interior of the feed hopper (5) is connected to the interior of the feed barrel (51), and the interior of the feed barrel (51) is connected to the interior of the impurity removal box (2); A matching second baffle (52) is arranged inside the feed barrel (51), an elastic plate (53) is arranged on one side of the second baffle (52), a rotating shaft (54) is arranged at both ends of the second baffle (52), a bearing (55) matching the rotating shaft (54) is arranged inside the feed barrel (51), a plurality of fixed blocks (56) are arranged at the bottom of the second baffle (52) and inside the feed barrel (51), and a plurality of return springs (57) are arranged between the second baffle (52) and the feed barrel (51).

8. The device for recovering rare earth from NdFeB waste according to claim 7, characterized in that: The number of the second baffle plates (52) and the number of the elastic plates (53) are both set to two, and the elastic plates (53) are fixedly connected to the second baffle plates (52).

9. The device for recovering rare earth from NdFeB waste according to claim 7, characterized in that: The number of the rotating shafts (54) and the bearings (55) are set in a plurality of groups, and the second baffle plate (52) is rotatably connected to the feed barrel (51) via the rotating shaft (54) and the bearings (55).

10. The device for recovering rare earth from NdFeB waste according to claim 7, characterized in that: The return spring (57) is detachably connected to the fixing block (56) via a through hole; The number of the return springs (57) is set to four groups, and the number of the fixing blocks (56) is set to eight groups. The second baffle (52) is elastically connected to the feeding cylinder (51) via a return spring (57).

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