Back washing device for neodymium iron boron waste acid leaching iron slag

Abstract

The invention discloses a back washing device for neodymium iron boron waste acid leaching iron slag, and belongs to the technical field of acid leaching iron slag back washing devices.The back washing device comprises a back washing pool and a filter cylinder arranged in the back washing pool, a sealing assembly matched with the filter cylinder is arranged in the back washing pool, and the back washing pool can be divided into a left cavity and a right cavity through the arranged sealing assembly; the sealing assembly comprises a sealing base and a sealing plate surrounding the outer side of the sealing base. Through cooperation of the sealing base and the sealing plate, the filter cartridge can rotate by 180 degrees after being matched with the sealing base, so that the filter cartridge can enter the other cavity in the backwashing pool for secondary backwashing, and in the whole process, solutions in the two cavities in the backwashing pool cannot be mixed with each other, so that compared with a traditional backwashing mode, the backwashing efficiency is improved, and the backwashing efficiency is improved. The device is more coherent when the residues are subjected to secondary backwashing, and the secondary backwashing time can be remarkably shortened.

Description

Technical Field

[0001] The invention relates to the technical field of acid leaching iron slag rewashing devices, in particular to a rewashing device for acid leaching iron slag of NdFeB waste materials. Background Art

[0002] Neodymium iron boron is a high-performance permanent magnet material widely used in electronics, new energy and other fields. When recycling waste materials, acid leaching is usually used to dissolve the metal in them. After acid leaching, a large amount of solid waste slag mainly containing iron (acid leached iron slag) will be produced.

[0003] Chinese patent CN222119344U discloses a rare earth pickling and refining device, which can conveniently pour rare earth raw materials into the filter barrel inside the ring seat. The filter barrel is convenient for holding the rare earth raw materials, facilitating pickling of the rare earth and allowing the remaining solid residue to be intercepted in the filter barrel.

[0004] The above-mentioned device loads the residue through the filter barrel provided, but during the multiple rewashing process, the solution in the tank needs to be discharged and then refilled with acidic solution to rewash the residue, which makes the overall operation inconsistent and time-consuming. In summary, there is still room for improvement in the above-mentioned device.

[0005] Therefore, it is necessary to provide a rewashing device for acid leaching iron slag of NdFeB waste to solve the above technical problems. Summary of the Invention

[0006] The object of the present invention is to provide a rewashing device for acid-leaching iron slag of NdFeB waste, so as to solve the problem that the existing device proposed in the above background technology loads the residue through a filter barrel, but during multiple rewashing processes, it is necessary to drain the solution in the tank body and then refill the acidic solution to rewash the residue, making the overall operation more time-consuming.

[0007] Based on the above ideas, the present invention provides the following technical solutions: a rewashing device for acid-leaching iron slag from NdFeB waste, comprising a rewashing tank and a filter cartridge arranged in the rewashing tank, wherein a sealing assembly cooperating with the filter cartridge is provided in the rewashing tank, and the sealing assembly can divide the rewashing tank into two left and right chambers; The sealing assembly includes a sealing base and a sealing plate enclosed on the outside of the sealing base. The sealing plate is an arc-shaped structure. When the filter cartridge is driven to move to one side of the sealing base and fits into the sealing base, the filter cartridge can drive the sealing base to rotate synchronously. During this process, the filter cartridge can rotate to the inner side of the sealing plate and complete the position exchange between the two chambers in the rewash tank.

[0008] As a further solution of the present invention: a chain is provided at the position above the rewash tank, the filter cartridge is a semi-annular structure, a rotating shaft is installed at the axial position of the filter cartridge, the rotating shaft cooperates with the filter cartridge through a clamping assembly, and a driven sprocket is provided on the outer fixed sleeve of the rotating shaft, and the driven sprocket is engaged with the chain.

[0009] As a further solution of the present invention: two guide grooves are symmetrically provided on the bottom surface of the rewash tank, and an annular groove is provided at the center of the bottom surface of the rewash tank, and the annular groove is connected to the guide groove. Guide blocks that slide in cooperation with the guide groove are fixed on both sides of the bottom surface of the filter cartridge. When the filter cartridge is in contact with the sealing base, the guide block can slide from the guide groove into the annular groove.

[0010] As a further solution of the present invention: a semi-annular convex strip is fixedly provided on the top surface of the sealing plate, a rocker arm is fixedly installed on the outer side of the rotating shaft, and a push rod is slidably assembled on the end of the rocker arm away from the rotating shaft. When the sealing base rotates and changes position with the filter cartridge, the rotating shaft drives the rocker arm to rotate, and the force of the push rod on the convex strip can drive the sealing plate to rotate and finally enclose the outer side of the sealing base.

[0011] As a further solution of the present invention: a vertical shaft is fixedly provided on the bottom surface of the sealing base at the axis, a ring is provided on the outer side of the vertical shaft, and the ring is fixed to the rewashing tank. A limiting block is elastically connected to the outer peripheral wall of the vertical shaft, and a limiting groove matching the limiting block is provided on the inner wall of the ring. There are two limiting grooves and they are symmetrically distributed about the axis center of the ring. A magnetic strip is slidingly provided on the outer peripheral wall of the sealing base, and a traction rope is fixed between the magnetic strip and the limiting block. A magnetic plate matching the magnetic strip is fixedly embedded on the inner wall of the sealing plate, and the opposite side of the magnetic plate and the magnetic strip has different magnetic poles.

[0012] As a further solution of the present invention: side columns are fixedly provided inside the rewash tank and at positions on both sides, the sealing assembly is installed between the side columns, and a stop block that cooperates with the convex strip is slidably provided on the inner side surface of one of the side columns.

[0013] As a further solution of the present invention: a guide bar is fixedly provided on the bottom surface of the sealing base, and the guide bar is in contact with the inner wall of the annular groove and can slide in the annular groove.

[0014] As a further solution of the present invention: the clamping assembly includes a clamping block arranged on the outer wall of the rotating shaft and elastically matched with the rotating shaft, and the end of the clamping block extending out of the rotating shaft is a spherical structure, the top of the filter cartridge is provided with a blind hole matching with the rotating shaft, and the inner wall of the blind hole is provided with a clamping groove matching with the clamping block.

[0015] As a further solution of the present invention: the inner wall of the magnetic plate is aligned with the inner wall of the sealing plate.

[0016] As a further solution of the present invention: sprockets are provided at both ends of the chain, and bases are installed at both sides of the rewash tank, so that the sprockets are rotatably installed on the bases.

[0017] Compared with the prior art, the beneficial effect of the present invention is that: this device cooperates with the sealing base and the sealing plate through the arrangement, so that the filter cartridge can rotate 180° after cooperating with the sealing base, so that it can enter another chamber in the rewashing tank for secondary rewashing, and during the whole process, the solutions in the two chambers inside the rewashing tank will not mix with each other. Compared with the traditional rewashing method, this device is more consistent when performing secondary rewashing on the residue, and can significantly shorten the time of secondary rewashing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the guide groove and annular groove structure of the present invention; Figure 3 This is a schematic diagram of the push rod and the convex strip of the present invention; Figure 4 is a cross-sectional view of the present invention; Figure 5 This is a schematic diagram of the cooperation between the filter cartridge and the sealing assembly of the present invention; Figure 6 This is a schematic diagram of the position of the sealing base of the present invention after rotating half a circle; Figure 7 This invention Figure 4 A schematic diagram of the enlarged structure at point A; Figure 8 This invention Figure 4 A schematic diagram of the enlarged structure at point B; Figure 9 This invention Figure 6 Schematic diagram of the enlarged structure at C; Figure 10 It is a schematic structural diagram of the lifting block of the present invention.

[0019] In the figure: 1. Rewash tank; 101. Baffle; 102. Side column; 1021. Block; 103. Guide groove; 104. Annular groove; 2. Chain; 3. Driven sprocket; 4. Rotating shaft; 401. Block; 5. Filter cartridge; 501. Guide block; 502. Slot; 6. Sealing plate; 601. Raised strip; 602. Magnetic plate; 7. Sealing base; 701. Vertical axis; 702. Guide strip; 703. Positioning groove; 8. Ring; 9. Rocker; 901. Push rod; 10. Insert rod; 11. Positioning rod; 1101. Slot; 1102. Chamfer; 12. Pull rope; 13. Magnetic strip; 14. Limit block; 15. Lifting block. DETAILED DESCRIPTION

[0020] like Figures 1-10 As shown, a rewashing device for acid-leaching iron slag of NdFeB waste includes a rewashing tank 1 and a filter cartridge 5 arranged in the rewashing tank 1. The bottom of the filter cartridge 5 is a solid structure and fits into the inner bottom surface of the rewashing tank 1. In actual use, the recycled NdFeB waste slag is put into the filter cartridge 5, and the rare earth in the waste slag is dissolved by the acidic solution in the rewashing tank 1, so that the rare earth metal can be fully recycled. Of course, an agitator can also be installed at the inner end face of the rewashing tank 1 to make the solution fully contact with the residue in the filter cartridge 5. In addition, a cover can be installed on the top of the rewashing tank 1 to seal the top of the rewashing tank 1, and a blower is installed at the cover to extract the exhaust gas, and the chain 2 that drives the filter cartridge 5 to move is set through the cover.

[0021] In the actual operation process, the waste residue needs to be rewashed several times. Therefore, in this solution, a sealing component that matches the filter cartridge 5 is provided in the rewash tank 1. Figure 1 As shown, side columns 102 are fixedly provided inside the rewash tank 1 and at positions on both sides, and the sealing assembly is installed between the side columns 102 on both sides. The provided sealing assembly can divide the rewash tank 1 into two left and right chambers. Initially, the filter cartridge 5 containing residue is in one of the chambers. When the chamber needs to be replaced after rewashing for a period of time, it is only necessary to move the filter cartridge 5 to the sealing assembly. Specifically, when the filter cartridge 5 is fitted with the sealing assembly, the filter cartridge 5 can drive the sealing assembly to rotate synchronously, so that the filter cartridge 5 can be rotated to the other chamber for secondary rewashing, and the provided sealing assembly can prevent the solutions in the two chambers from mixing with each other during the process of exchanging the position of the filter cartridge 5.

[0022] In order to drive the filter cartridge 5 to move in the rewash tank 1, a chain 2 is provided above the rewash tank 1. Figures 1-4As shown, the filter cartridge 5 is a semi-annular structure, and the axial position of the filter cartridge 5 is set to a cylindrical structure. Specifically, a rotating shaft 4 is set on the top of the filter cartridge 5 and at the axis. The rotating shaft 4 is movably connected to the filter cartridge 5 and the rotating shaft 4 can move relative to the filter cartridge 5 along its axial direction. A driven sprocket 3 is fixedly sleeved on the outer side of the rotating shaft 4, and the driven sprocket 3 is unilaterally engaged with the chain 2. During the rewashing process, the rotating shaft 4 is clamped with the filter cartridge 5 through the clamping assembly, making it difficult for the rotating shaft 4 to rotate relative to the filter cartridge 5. This results in the chain 2 not being able to drive the driven sprocket 3 to rotate during rotation. Therefore, as the chain 2 rotates, it will pull the driven sprocket 3 to move in the horizontal direction, thereby driving the filter cartridge 5 to move in the rewashing tank 1.

[0023] The sealing assembly includes a sealing base 7 and a sealing plate 6 arranged above the sealing base 7. The inner diameter of the sealing plate 6 is equal to the outer diameter of the filter cartridge 5, so that the filter cartridge 5 can be rotated to the inner side of the sealing plate 6. Figure 6 As can be seen from the figure, the sealing base 7 is an L-shaped structure as a whole. Specifically, the sealing base 7 has a vertical surface and a semicircular bottom surface located on one side of the vertical surface. Figure 5-Figure 6 It can be seen that the sealing plate 6 is a semicircular structure and is surrounded by the outside of the sealing base 7. The bottom surface of the sealing base 7 is in contact with the inner bottom surface of the rewash tank 1, and the arc-shaped sealing plate 6 is in close contact with the side columns 102 on both sides. Specifically, the side of the side column 102 close to the sealing plate 6 is an arc surface, and a rubber pad can be pasted on the side of the side column 102 close to the sealing plate 6 to increase the friction between the sealing plate 6 and the side column 102.

[0024] In order to ensure that the filter cartridge 5 can move stably in the rewash tank 1, the present invention provides two guide grooves 103 symmetrically on the bottom surface of the rewash tank 1. Figure 1-Figure 2 As shown, an annular groove 104 is provided at the center of the inner bottom surface of the rewash tank 1, and the annular groove 104 is connected to the guide groove 103. Guide blocks 501 that slide with the guide groove 103 are fixed on both sides of the bottom surface of the filter cartridge 5. In actual use, when the filter cartridge 5 is in contact with the sealing base 7, the guide block 501 can slide from the guide groove 103 to the annular groove 104, thereby providing conditions for the rotation of the filter cartridge 5 and the sealing assembly.

[0025] During specific use, after the residue is rewashed in a chamber of the rewash tank 1, the filter cartridge 5 is driven to move toward the direction close to the sealing assembly. When the filter cartridge 5 is in contact with the sealing base 7, the guide block 501 is in the annular groove 104. At this time, driving the filter cartridge 5 to rotate can synchronously drive the sealing assembly to rotate, while the arc-shaped sealing plate 6 is in its original position and remains stationary. Here, the two chambers in the rewash tank 1 are isolated by the sealing plate 6 to prevent the solutions in the two chambers from flowing into each other.

[0026] Combine Figures 1-6 As shown, a semi-annular ridge 601 is fixedly provided on the top surface of the sealing plate 6, and a rocker arm 9 is fixedly installed on the outer side of the rotating shaft 4. A push rod 901 is provided at the end surface of the rocker arm 9 away from the rotating shaft 4. The push rod 901 is located on one side of the ridge 601. The push rod 901 slides with the rocker arm 9 so that the push rod 901 can move along the width direction of the rocker arm 9. In actual use, when the sealing base 7 rotates half a circle with the filter cartridge 5 and changes position, the rotating shaft 4 drives the rocker arm 9 to rotate. The force of the push rod 901 on the ridge 601 can drive the sealing plate 6 to rotate and finally re-engage with the sealing base 7. In this process, the two chambers inside the rewash tank 1 are isolated by the sealing base 7.

[0027] like Figure 4 、 Figure 7 As shown in A, in order for the filter cartridge 5 to fit more stably on the sealing base 7, a positioning rod 11 is fixedly provided on one side of the filter cartridge 5 close to the sealing base 7 and located at the center line. Correspondingly, a positioning groove 703 that cooperates with the positioning rod 11 is provided on the side of the sealing base 7 close to the filter cartridge 5.

[0028] In order to position the sealing base 7 which rotates half a circle, a vertical shaft 701 is fixedly provided on the bottom surface of the sealing base 7 and located at the axis. Figure 4 As shown, the vertical shaft 701 passes downward through the rewash tank 1 and rotates with it, and a collar 8 is sleeved on the outside of the vertical shaft 701. The collar 8 is fixed at the bottom of the rewash tank 1 and is combined with the vertical shaft 701 to rotate with the vertical shaft 701. Figure 4 、 Figure 8 As shown, a limiting block 14 is elastically connected to the outer peripheral wall of the vertical axis 701, and a limiting groove cooperating with the limiting block 14 is opened on the inner wall of the ring 8. There are two limiting grooves and they are symmetrically distributed with respect to the axis center of the ring 8. In addition, a magnetic strip 13 is slidingly arranged on the outer peripheral wall of the sealing base 7, and a traction rope 12 is fixedly arranged between the magnetic strip 13 and the limiting block 14, and a magnetic plate 602 cooperating with the magnetic strip 13 is fixedly embedded on the inner wall of the sealing plate 6, and the inner wall of the magnetic plate 602 is aligned with the inner wall of the sealing plate 6, and the side of the magnetic plate 602 opposite to the magnetic strip 13 has different magnetic poles.

[0029] Working principle: Initially, the rotating shaft 4 cooperates with the filter cartridge 5 through the clamping assembly, making it difficult to drive the rotating shaft 4 to rotate through the cooperation of the chain 2 and the driven sprocket 3. Therefore, during the rotation of the chain 2, the filter cartridge 5 can be driven to move in a chamber of the rewash tank 1, which is beneficial for the residue in the filter cartridge 5 to fully contact with the acidic solution and is beneficial for the treatment of rare earth metals on the surface of the residue. After a period of time, the residue in the filter cartridge 5 needs to be rewashed for a second time. At this time, the filter cartridge 5 is driven to move toward the direction close to the sealing base 7 and finally fits with the sealing base 7. During this process, the guide block 501 can move from the guide groove 103 to the annular groove 104, thereby providing conditions for the rotation of the filter cartridge 5 and the sealing base 7; When the guide block 501 enters the annular groove 104, the cooperation between the chain 2 and the driven sprocket 3 can drive the rotating shaft 4 and the filter cartridge 5 to rotate, thereby driving the sealing base 7 in contact with the filter cartridge 5 to rotate synchronously. When the sealing base 7 rotates 180°, the limit block 14 on the vertical shaft 701 can be aligned with the limit groove on the inner wall of the collar 8, so that one end of the limit block 14 can be inserted into the limit groove, so that the vertical shaft 701 and the collar 8 are locked, so that the sealing base 7 can no longer rotate. Since the filter cartridge 5 and the sealing base 7 remain stationary after rotating 180 degrees, the force between the rotating shaft 4 and the filter cartridge 5 increases, so that the rotating shaft 4 can rotate relative to the filter cartridge 5. At this time, the chain 2 and the driven sprocket 3 cooperate to drive the rotating shaft 4 to rotate relative to the filter cartridge 5. The rocker arm 9 and the push rod 901 at the end of the rocker arm 9 can drive the ridge 601 and the sealing plate 6 to rotate during the rotation of the rotating shaft 4. Figure 3 、 Figure 9 As shown, a stopper 1021 is slidingly provided on the inner side surface of one of the side columns 102. In the initial state, one end of the protrusion 601 is attached to one side of the stopper 1021. When the push rod 901 drives the protrusion 601 to rotate 180°, the other end of the protrusion 601 rotates to the other side of the stopper 1021 and is blocked again by the stopper 1021. At this point, the sealing plate 6 also rotates 180° and re-matches with the sealing base 7. Since the sealing base 7 and the sealing plate 6 rotate alternately, the solutions in the two chambers inside the rewash tank 1 can be avoided from mixing during the whole process, which is conducive to the rapid secondary rewashing of the residue in the filter cartridge 5.

[0030] After the sealing plate 6 is rotated to the outside of the sealing base 7 again, the magnetic plate 602 can be realigned with the magnetic strip 13, thereby pulling the traction rope 12 through the suction force between the two, so that one end of the limit block 14 can be moved out of the limit groove, which is convenient for the next use. In addition, the cooperation between the chain 2 and the driven sprocket 3 can drive the filter cartridge 5 to be rewashed in another chamber inside the rewash tank 1.

[0031] To sum up, this device cooperates with the sealing base 7 and the sealing plate 6, so that the filter cartridge 5 can rotate 180° after cooperating with the sealing base 7, so that it can enter another chamber in the rewashing tank 1 for secondary rewashing. During the whole process, the solutions in the two chambers inside the rewashing tank 1 will not mix with each other. Compared with the traditional rewashing method, this device is more consistent when performing secondary rewashing on the residue, and can significantly shorten the time of secondary rewashing.

[0032] As a further development of the connection method between the filter cartridge 5 and the sealing base 7, this solution is provided with an insertion rod 10 on the sealing base 7 and below the positioning groove 703. The top end of the insertion rod 10 can extend into the positioning groove 703. The insertion rod 10 is elastically matched with the sealing base 7 and can move up and down relative to the sealing base 7. The outer peripheral wall of the positioning rod 11 is provided with a slot 1101 that cooperates with the insertion rod 10. Figure 7 As shown, the end surface of the positioning rod 11 away from the filter cartridge 5 is provided with a chamfer 1102, combined with Figure 4 、 Figure 7-Figure 8 As shown, a traction rope 12 is also fixedly provided between the insertion rod 10 and the magnetic strip 13. Specifically, the traction rope 12 between the limit block 14 and the magnetic strip 13 passes through the vertical axis 701 and the sealing base 7 and slides with the two, while the traction rope 12 between the insertion rod 10 and the magnetic strip 13 passes through the sealing base 7 and slides with it. In actual use, when the filter cartridge 5 approaches and fits the sealing base 7, the positioning rod 11 can be inserted into the positioning groove 703, and when the chamfer 1102 contacts the insertion rod 10, the insertion rod 10 can be pressed downward. When the slot 1101 is aligned with the insertion rod 10, the top end of the insertion rod 10 can be inserted into the slot 1101, thereby locking the filter cartridge 5 and the sealing base 7. At this time, the cooperation between the chain 2 and the driven sprocket 3 can stably drive the sealing base 7 and the filter cartridge 5 to rotate, and in the process of the push rod 901 driving the protrusion 601 and the sealing plate 6 to rotate, the filter cartridge 5 can also be locked to one side of the sealing base 7. Specifically, when the sealing plate 6 is rotated to the outside of the sealing base 7 again so that the magnetic plate 602 is aligned with the magnetic strip 13, the two traction ropes 12 can be pulled at the same time through the cooperation between the magnetic plate 602 and the magnetic strip 13, so that the top of the insertion rod 10 can be moved out of the slot 1101. At this time, the filter cartridge 5 has the conditions for separation from the sealing base 7. Therefore, in the process of the chain 2 and the driven sprocket 3 cooperating, the filter cartridge 5 can be pulled to move in the direction away from the sealing base 7.

[0033] Reference Figure 1As shown, sprockets are provided at both ends of the chain 2, so that the chain 2 is sleeved on the outside of the two sprockets, and bases for installing the sprockets are fixed at both sides of the rewash tank 1. Specifically, the sprockets are rotatably installed on the bases, and a driving motor is provided at one of the bases. The output shaft of the driving motor is rotatably connected to the sprocket, so that the driving motor can drive the sprocket to rotate. An L-shaped baffle 101 is provided on the outside of the chain 2, and the baffle 101 is fixed to the rewash tank 1 by bolts. Through this structure, the chain 2 can be located between the driven sprocket 3 and the baffle 101, so that one side of the chain 2 can stably cooperate with the driven sprocket 3.

[0034] In actual use, a through groove can be opened on one side of the rewash tank 1 and sealed by a sealing plate, which is convenient for removing the filter cartridge 5. In addition, water inlet pipes and drain pipes are installed on the rewash tank 1 and at the positions of the two chambers, which is convenient for introducing solution into the rewash tank 1 or discharging cleaning liquid.

[0035] Reference Figure 2 As shown, a guide bar 702 is fixedly provided on the bottom surface of the sealing base 7. The guide bar 702 is in contact with the inner wall of the annular groove 104 and can slide in the annular groove 104. Through this structure, on the one hand, it is beneficial to the stable rotation of the sealing base 7, and on the other hand, it can prevent the solution in one chamber from flowing into the other chamber through the guide groove 103.

[0036] Reference Figure 3 As shown, slots are provided on the inner surface of the side column 102 near the top and on the end surface of the rocker arm 9 away from the rotating shaft 4. The above-mentioned stopper 1021 and the push rod 901 slide in the slots. In addition, sliding rods are fixedly provided in the slots of the side column 102 and the rocker arm 9. The two sliding rods pass through the stopper 1021 and the push rod 901 respectively and slide with them.

[0037] Reference Figure 7As shown, the clamping assembly includes a clamping block 401 provided on the outer wall of the rotating shaft 4 and elastically matched with the rotating shaft 4, and the end of the clamping block 401 extending from the rotating shaft 4 is a spherical structure, the top of the filter cartridge 5 is provided with a blind hole that matches the rotating shaft 4, and the inner wall of the blind hole is provided with a clamping groove 502 that matches the clamping block 401. During the rewashing process, the spherical surface on the clamping block 401 is in the clamping groove 502. At this time, the guide block 501 slides in the guide groove 103. Therefore, when the chain 2 rotates, the filter cartridge 5 is provided with a blind hole that matches the rotating shaft 4. During the rotation, one end of the block 401 will not move out of the slot 502, so that the chain 2 can drive the driven sprocket 3 and the filter cartridge 5 to slide along the rewash tank 1. However, when the filter cartridge 5 is attached to the sealing base 7 and rotated 180°, the vertical shaft 701 is locked with the ring 8, so that the filter cartridge 5 cannot move further. At this time, as the chain 2 moves, the driven sprocket 3 and the rotating shaft 4 can be driven to rotate, thereby prompting one end of the block 401 to move out of the slot 502.

[0038] Of course, you can also use Figure 10 The rotating shaft 4 is connected to the filter cartridge 5 in the manner described above. Specifically, a lifting block 15 is slidably installed at the top end surface of the rotating shaft 4. The lifting block 15 is made of iron, and an electromagnet cooperating with the lifting block 15 is installed on the top of the rotating shaft 4. A pull rope is fixedly arranged between the lifting block 15 and the clamping block 401, and the pull rope passes through the rotating shaft 4 and slides with it. In this manner, the end of the clamping block 401 extending out of the rotating shaft 4 does not need to be set as a spherical structure. During rewashing, one end of the clamping block 401 is fully inserted into the clamping groove 502, so that the chain 2 can stably drive the filter cartridge 5 to move. When the filter cartridge 5 is attached to the sealing base 7 and rotated 180°, the staff can control the electromagnet to be energized, and use the suction force between the electromagnet and the lifting block 15 to pull the pull rope, thereby prompting one end of the clamping block 401 to move out of the clamping groove 502, so that the rotating shaft 4 can rotate relative to the filter cartridge 5.

[0039] A sliding groove is provided on the outer peripheral wall of the rotating shaft 4 to slide with the clamping block 401 , and a limiting spring is fixedly provided between the inner end surface of the sliding groove and the clamping block 401 .

[0040] Reference Figure 8 As shown, a groove that slides with the limit block 14 is provided on the outer peripheral wall of the vertical axis 701, and a deep hole that slides with the insertion rod 10 is provided on the sealing base 7. Springs are fixed between the inner end surface of the deep hole and the insertion rod 10, and between the inner end surface of the groove and the limit block 14. A mounting groove that slides with the magnetic strip 13 is provided on the sealing base 7, which is conducive to the installation of the magnetic strip 13.

Claims

1. A rewashing device for acid-leaching iron slag from NdFeB waste, comprising a rewashing tank and a filter cartridge arranged in the rewashing tank, characterized in that: The rewash tank is provided with a sealing assembly that cooperates with the filter cartridge, and the rewash tank can be divided into two left and right chambers by the provided sealing assembly; The sealing assembly includes a sealing base and a sealing plate enclosed on the outside of the sealing base. The sealing plate is an arc-shaped structure. When the filter cartridge is driven to move to one side of the sealing base and fits into the sealing base, the sealing base can be driven to rotate synchronously through the filter cartridge. During this process, the filter cartridge can rotate to the inside of the sealing plate and complete the position exchange between the two chambers in the rewash tank.

2. The rewashing device for acid leaching iron slag of NdFeB waste according to claim 1, characterized in that: A chain is provided above the rewash tank. The filter cartridge is a semi-annular structure. A rotating shaft is installed at the axis of the filter cartridge. The rotating shaft cooperates with the filter cartridge through a clamping assembly. A driven sprocket is provided on the outer fixed sleeve of the rotating shaft, and the driven sprocket is engaged with the chain.

3. The rewashing device for acid leaching iron slag of NdFeB waste according to claim 2, characterized in that: Two guide grooves are symmetrically provided on the bottom surface of the rewash tank, and an annular groove is provided at the center of the bottom surface of the rewash tank. The annular groove is connected to the guide groove, and guide blocks that slide with the guide grooves are fixed on both sides of the bottom surface of the filter cartridge. When the filter cartridge is in contact with the sealing base, the guide blocks can slide from the guide groove into the annular groove.

4. The rewashing device for acid leaching iron slag of NdFeB waste according to claim 3, characterized in that: A semi-annular convex strip is fixedly provided on the top surface of the sealing plate, a rocker arm is fixedly installed on the outer side of the rotating shaft, and a push rod is slidably assembled on the end of the rocker arm away from the rotating shaft. When the sealing base rotates and changes position with the filter cartridge, the rotating shaft drives the rocker arm to rotate, and the force of the push rod on the convex strip can drive the sealing plate to rotate and finally enclose the outer side of the sealing base.

5. The rewashing device for acid leaching iron slag of NdFeB waste according to claim 4, characterized in that: The bottom surface of the sealing base is fixedly provided with a vertical shaft at the axis, and a ring is provided on the outer side of the vertical shaft, which is fixed to the rewashing tank. The outer peripheral wall of the vertical shaft is elastically connected to a limit block, and the inner wall of the ring is provided with a limit groove that matches the limit block. There are two limit grooves and they are symmetrically distributed about the axis center of the ring. A magnetic strip is slidably provided on the outer peripheral wall of the sealing base, and a traction rope is fixed between the magnetic strip and the limit block. A magnetic plate that matches the magnetic strip is fixedly embedded on the inner wall of the sealing plate, and the opposite side of the magnetic plate and the magnetic strip has different magnetic poles.

6. The rewashing device for acid leaching iron slag of NdFeB waste according to claim 4, characterized in that: Side columns are fixedly arranged inside the rewash tank and at positions on both sides. The sealing assembly is installed between the side columns. A stopper that cooperates with the convex strip is slidably arranged on the inner side surface of one of the side columns.

7. The rewashing device for acid leaching iron slag of NdFeB waste according to claim 3, characterized in that: A guide bar is fixedly provided on the bottom surface of the sealing base. The guide bar is in contact with the inner wall of the annular groove and can slide in the annular groove.

8. The rewashing device for acid leaching iron slag of NdFeB waste according to claim 2, characterized in that: The clamping assembly includes a clamping block arranged on the outer wall of the rotating shaft and elastically matched with the rotating shaft, and the end of the clamping block extending from the rotating shaft is a spherical structure. The top of the filter cartridge is provided with a blind hole matched with the rotating shaft, and the inner wall of the blind hole is provided with a clamping groove matched with the clamping block.

9. The rewashing device for acid leaching iron slag of NdFeB waste according to claim 5, characterized in that: The inner wall of the magnetic plate is aligned with the inner wall of the sealing plate.

10. The rewashing device for acid leaching iron slag of NdFeB waste according to claim 2, characterized in that: Sprockets are provided at both ends of the chain, and bases are installed at both sides of the rewash tank, so that the sprockets are rotatably installed on the bases.

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