Leaching processing device for producing lithium carbonate by recovering lithium from lithium iron phosphate powder

Abstract

The invention relates to the technical field of lithium battery materials, in particular to a leaching processing device for producing lithium carbonate by recovering lithium from lithium iron phosphate powder, which comprises a leaching processing kettle, a unit processing rod embedded in the leaching processing kettle, and a leaching installation opening formed in the middle of the top of the leaching processing kettle, and a treatment connecting ring is arranged at the top of the unit treatment rod. The pumping piston circularly moves up and down, so that a solution continuously and circularly passes through the annular material storage interlayer, full contact of the solution and material powder is promoted, the leaching efficiency is improved, the material powder can be extruded and compressed through the annular piston after leaching is completed, the solution in the material powder can be effectively extruded out, and residues are avoided; and the unit treatment rod is of a unit type structural design and is detachably connected with the leaching treatment kettle, so that continuous leaching treatment work is facilitated, the production efficiency is improved, the unit treatment rod is also convenient to disassemble and clean, and the unit treatment rod is more convenient and quicker to maintain.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery materials, and in particular to a leaching processing device for recovering lithium from lithium iron phosphate powder to produce lithium carbonate. Background Art

[0002] With the rapid development of electric vehicles and the energy storage industry, the demand for lithium iron phosphate batteries has grown rapidly. However, as a large number of lithium iron phosphate batteries have reached the end of their service life, the recycling of used batteries has become an urgent problem to be solved. The lithium iron phosphate in the positive electrode material of lithium iron phosphate batteries is rich in lithium and has a high recycling value. At present, the lithium in lithium iron phosphate powder can be recovered through leaching, purification, lithium precipitation, and refining process conditions for use in the production of battery-grade lithium carbonate.

[0003] In the process of recovering lithium by the existing leaching method, it is usually necessary to mix lithium iron phosphate powder with the leachate so that the lithium element is dissolved in the solution. Subsequently, the leachate needs to be separated from the remaining solid matter. This process is usually filtered using a filter. However, in actual operation, as the leachate passes through the filter, solids are gradually deposited on the filter, which will cause the filter to be blocked, thereby affecting the filtration efficiency and making it difficult for the leachate to be discharged smoothly. In addition, solids will also be deposited on the inner wall of the leaching kettle, requiring additional cleaning and maintenance of the leaching container and the filter, which not only increases the complexity and labor intensity of the operation, but also reduces production efficiency. In order to temporarily store the solution, multiple solution containers need to be set up on the production line, which further increases the equipment investment and maintenance costs, resulting in low overall processing efficiency. Summary of the invention

[0004] In view of this, the purpose of the present invention is to propose a leaching processing device for recovering lithium from lithium iron phosphate powder to produce lithium carbonate, so as to solve the problem that when leaching is completed to recover lithium and solid-liquid separation is performed, the solid matter in the solution will not only gradually deposit on the filter screen as the leachate passes through the filter screen, but will also deposit on the inner wall of the leaching kettle, requiring additional cleaning and maintenance of the leaching container and the filter screen, resulting in low overall processing efficiency.

[0005] Based on the above purpose, the present invention provides a leaching processing device for recovering lithium from lithium iron phosphate powder to produce lithium carbonate, comprising a leaching treatment kettle, a leaching installation port is arranged in the middle of the top of the leaching treatment kettle, and further comprising:

[0006] A unit treatment rod is embedded in the leaching treatment kettle, a treatment connection ring is provided on the top of the unit treatment rod, the unit treatment rod is detachably and closedly connected to the leaching installation port through the treatment connection ring, and an annular embedding groove is provided around the bottom surface of the treatment connection ring;

[0007] An inner treatment cylinder is vertically arranged at the center of the unit treatment rod, an inner filter screen is arranged around the middle of the side wall of the inner treatment cylinder, a closed top cover and a closed bottom plate are arranged at the top and bottom of the inner treatment cylinder respectively, and a closed sliding sleeve is vertically arranged in the middle of the closed top cover;

[0008] A pumping piston is slidably mounted on the inner side of the inner treatment cylinder, a pumping connecting rod is vertically connected to the top of the pumping piston, the pumping connecting rod is nested and slidably connected to the closed sliding sleeve, and the pumping connecting rod drives the pumping piston to slide up and down along the inner treatment cylinder;

[0009] An outer treatment cylinder is nested and arranged outside the inner treatment cylinder, an outer filter screen is arranged around the middle of the side wall of the outer treatment cylinder, a top connecting ring and a closed bottom cover are arranged at the top and bottom of the outer treatment cylinder respectively, and the outer treatment cylinder is detachably and closedly connected between the top connecting ring and the annular fitting groove;

[0010] An annular material storage interlayer is arranged between the inner processing cylinder and the outer processing cylinder, an annular piston is slidably arranged in the middle of the annular material storage interlayer, a vertical connecting rod is connected to the top surface of the annular piston, a guide sleeve is vertically arranged in the middle of the processing connecting ring, the vertical connecting rod and the guide sleeve are nested and slidably connected, and the vertical connecting rod drives the annular piston to slide up and down along the annular material storage interlayer.

[0011] Furthermore, a vertical support frame is connected to the top of the processing connection ring, and a driving connection frame is connected to the top of the pumping connecting rod. The driving connection frame drives the pumping piston to move up and down synchronously through the pumping connecting rod. A driving screw sleeve is connected in the middle of the driving connection frame, and a driving screw is nested inside the driving screw sleeve. A driving motor is connected to the axial end of the driving screw, and the driving motor is fixedly connected to the vertical support frame.

[0012] Furthermore, a synchronous connecting frame is connected to the top of the vertical connecting rod, and the synchronous connecting frame is vertically slidably connected to the vertical supporting frame. The synchronous connecting frame drives the annular piston to move up and down synchronously through the vertical connecting rod. A horizontal sliding sleeve is provided in the middle of the synchronous connecting frame, and a linkage elastic pin is nested and slidably provided on the inner side of the horizontal sliding sleeve. A linkage slot is provided in the middle of the outer wall of the driving connecting frame. The linkage slot and the linkage elastic pin are corresponding to each other and their sizes match each other. A locking electromagnet is provided in the middle of the linkage slot. When the locking electromagnet is energized, it generates magnetic force to adsorb the linkage elastic pin to slide and embed it into the linkage slot.

[0013] Furthermore, the outer side wall of the top connecting ring is evenly connected with a plurality of interlocking connecting blocks, the middle of the side wall of the annular interlocking groove is evenly connected with a plurality of interlocking connecting grooves, the interlocking connecting grooves and the interlocking connecting blocks are corresponding to each other and their sizes match each other, and the top end of the interlocking connecting groove is connected with a rotation locking groove, the rotation locking groove and the interlocking connecting block are corresponding to each other and their sizes match each other.

[0014] Furthermore, it also includes a fixed base frame connected to the bottom of the leaching treatment kettle, and a plurality of leaching treatment kettles, washing treatment kettles, unloading conveying cylinders and filling storage cylinders are connected and evenly arranged in a circular shape on the top of the fixed base frame. The tops of the washing treatment kettle, unloading conveying cylinder and filling storage cylinder are respectively provided with washing installation ports, unloading installation ports and filling installation ports, and the sizes of the treatment connecting ring and the leaching installation port, washing installation port, unloading installation port and filling installation port are matched with each other.

[0015] Furthermore, a vertical guide frame is connected to the center of the fixed base frame, a lifting guide rail is provided in the middle of the vertical guide frame, an annular connecting frame is slidingly connected to the middle of the lifting guide rail, a hydraulic telescopic rod is connected to the lower part of the annular connecting frame, a rotating processing frame is rotatably connected to the inner side of the annular connecting frame, a rotating gear ring is arranged around the edge of the rotating processing frame, a rotating gear is meshingly connected to the outer side of the rotating gear ring, a rotating motor is connected to the shaft end of the rotating gear, and the rotating motor is fixedly connected to the annular connecting frame.

[0016] Furthermore, a plurality of unit processing rods are evenly connected and arranged in a circular shape in the middle of the rotary processing frame, and the unit processing rods are arranged corresponding to the leaching installation port, the washing installation port, the unloading installation port and the filling installation port. The unit processing rods are vertically plugged and closedly connected with the leaching installation port, the washing installation port, the unloading installation port and the filling installation port through a processing connecting ring.

[0017] Furthermore, a vertical guide sleeve is provided at the bottom of the filler storage cylinder, and a place-taking guide column is provided on the inner side of the vertical guide sleeve in a nested sliding connection. The place-taking guide column has the same diameter as the unit processing rod, and is located directly below the filler mounting port and has dimensions that match those of the filler mounting port. A rotating connection disk is provided on the top surface of the place-taking guide column, and a drive connection groove is provided in the middle of the top surface of the rotating connection disk. A traction electromagnet is provided in the middle of the drive connection groove, and a magnetic connection block is provided in the middle of the bottom surface of the closed bottom cover. The magnetic connection block and the drive connection groove are provided correspondingly to each other and have dimensions that match each other.

[0018] Furthermore, a lifting rack is vertically arranged in the middle of the inner wall of the vertical guide sleeve, a lifting motor is connected to the bottom of the place-taking guide column, a lifting gear is connected to the shaft end of the lifting motor, the lifting gear and the lifting rack are meshed with each other, a rotating motor is connected to the center of the rotating connecting disk, and the rotating motor is fixedly connected to the place-taking guide column.

[0019] Furthermore, a vertical air pipe is provided on the inside of the filler storage cylinder, a plurality of annular air pipes are provided on the middle of the vertical air pipe, the plurality of annular air pipes are evenly arranged along the vertical center line direction of the vertical air pipe, the annular air pipes are nested on the outside of the placeholder guide column, a plurality of air outlet openings are evenly provided on the outer side wall of the annular air pipe, and a booster air pump is connected to the outer end of the vertical air pipe.

[0020] Beneficial effects of the present invention: As can be seen from the above, the present invention provides a leaching processing device for recovering lithium from lithium iron phosphate powder to produce lithium carbonate. During production, the material powder is loaded into the annular material storage interlayer between the inner processing cylinder and the outer processing cylinder, and then the unit processing rod is inserted into the interior of the leaching processing kettle as a whole. The solution is continuously circulated through the annular material storage interlayer through the cyclic up and down movement of the pumping piston, which promotes the full contact between the solution and the material powder, improves the leaching efficiency, and after the leaching is completed, the material powder in the annular material storage interlayer can be squeezed and compressed by the annular piston, which can effectively squeeze out the solution therein and avoid residual The thoroughness of leaching is improved, the overall leaching extraction efficiency and effect are better, and the raw materials are always constrained in the unit processing rod, which is more convenient to handle. The unit processing rod is designed with a unit structure and is detachably connected to the leaching processing kettle. After a unit processing rod completes the leaching treatment, it can be quickly pulled out and disassembled, and another unit processing rod filled with untreated materials can be inserted and installed for treatment. The unit processing rod that has completed the treatment can carry out subsequent unloading and refilling work, which is convenient for continuous leaching treatment and improves production efficiency. It is also easy to disassemble and clean the unit processing rod, and maintenance is more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a front structural schematic diagram of an embodiment of the present invention;

[0023] Figure 2It is a structural schematic diagram of the insertion state of the unit processing rod according to an embodiment of the present invention;

[0024] Figure 3 It is a structural schematic diagram of a unit processing rod in a raised state according to an embodiment of the present invention;

[0025] Figure 4 A schematic structural diagram of an annular connecting frame according to an embodiment of the present invention;

[0026] Figure 5 A schematic structural diagram of a unit processing rod according to an embodiment of the present invention;

[0027] Figure 6 It is a schematic structural diagram of a vertical support frame according to an embodiment of the present invention;

[0028] Figure 7 It is a schematic structural diagram of an inner treatment cylinder according to an embodiment of the present invention;

[0029] Figure 8 A schematic diagram of the structure of a processing connection ring according to an embodiment of the present invention;

[0030] Fig. 9 A schematic diagram of the structure of the drive connection according to an embodiment of the present invention;

[0031] Fig.10 It is a structural schematic diagram of a filler storage cylinder according to an embodiment of the present invention;

[0032] Fig.11 A schematic structural diagram of a placeholder guide column according to an embodiment of the present invention;

[0033] Fig.12 It is a schematic structural diagram of a discharge conveying cylinder according to an embodiment of the present invention.

[0034] The markings in the figure are:

[0035] 1. Fixed chassis; 101. Vertical guide frame; 102. Lifting guide rail; 103. Hydraulic telescopic rod; 104. Ring connecting frame; 105. Rotating processing frame; 106. Rotating gear ring; 107. Rotating gear; 108. Rotating motor; 2. Leaching treatment kettle; 201. Leaching installation port; 202. Washing treatment kettle; 203. Washing installation port; 204. Piston bottom plate; 205. Lifting hydraulic rod; 206. Discharge conveying cylinder; 207 , unloading installation port; 208, rotating cleaning rack; 209, cleaning brush; 3, stuffing storage cylinder; 301, stuffing installation port; 302, vertical air pipe; 303, annular air pipe; 304, air outlet; 305, booster air pump; 4, vertical guide sleeve; 401, lifting rack; 402, occupying guide column; 403, lifting motor; 404, lifting gear; 405, rotating connection plate; 406, rotating motor; 407, drive connection slot; 408, traction electromagnet; 5, unit processing rod; 501, processing connection ring; 502, guide sleeve; 503, annular interlocking groove; 504, interlocking connection groove; 505, rotation locking groove; 506, vertical support frame; 507, drive screw; 508, drive motor; 6, inner processing cylinder; 601, inner filter; 602, closed top cover; 603, closed sleeve; 604, closed bottom plate; 7, pumping piston; 701, pumping Connecting rod; 702, driving connecting frame; 703, driving screw sleeve; 704, linkage slot; 705, locking electromagnet; 8, external treatment cylinder; 801, external filter screen; 802, top connecting ring; 803, mosaic connecting block; 804, closed bottom cover; 805, magnetic connecting block; 9, annular material storage interlayer; 901, annular piston; 902, vertical connecting rod; 903, synchronous connecting frame; 904, horizontal sliding sleeve; 905, linkage elastic pin. DETAILED DESCRIPTION

[0036] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0037] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0038] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 As shown, a leaching processing device for recovering lithium from lithium iron phosphate powder to produce lithium carbonate includes a leaching treatment kettle 2, a leaching installation port 201 is arranged in the middle of the top of the leaching treatment kettle 2, and also includes:

[0039] The unit treatment rod 5 is embedded in the leaching treatment kettle 2. A treatment connection ring 501 is provided on the top of the unit treatment rod 5. The unit treatment rod 5 is detachably and closedly connected to the leaching installation port 201 through the treatment connection ring 501. The bottom surface of the treatment connection ring 501 is surrounded by an annular embedding groove 503.

[0040] The inner treatment cylinder 6 is vertically arranged at the center of the unit treatment rod 5. An inner filter screen 601 is arranged around the middle of the side wall of the inner treatment cylinder 6. A closed top cover 602 and a closed bottom plate 604 are arranged at the top and bottom of the inner treatment cylinder 6, respectively. A closed sliding sleeve 603 is vertically arranged in the middle of the closed top cover 602.

[0041] The pumping piston 7 is slidably arranged on the inner side of the inner treatment cylinder 6, and a pumping connecting rod 701 is vertically connected to the top of the pumping piston 7. The pumping connecting rod 701 is nested and slidably connected with the closed sliding sleeve 603, and the pumping connecting rod 701 drives the pumping piston 7 to slide up and down along the inner treatment cylinder 6;

[0042] The outer treatment cylinder 8 is nested and arranged outside the inner treatment cylinder 6. An outer filter screen 801 is arranged around the middle of the side wall of the outer treatment cylinder 8. The top and bottom of the outer treatment cylinder 8 are respectively provided with a top connecting ring 802 and a closed bottom cover 804. The outer treatment cylinder 8 is detachably and closedly connected to the annular fitting groove 503 through the top connecting ring 802.

[0043] An annular material storage interlayer 9 is arranged between the inner processing cylinder 6 and the outer processing cylinder 8. An annular piston 901 is slidably arranged in the middle of the annular material storage interlayer 9. A vertical connecting rod 902 is connected to the top surface of the annular piston 901. A guide sleeve 502 is vertically arranged in the middle of the processing connecting ring 501. The vertical connecting rod 902 and the guide sleeve 502 are nested and slidably connected. The vertical connecting rod 902 drives the annular piston 901 to slide up and down along the annular material storage interlayer 9.

[0044] In this embodiment, when the device is in production, the outer treatment cylinder 8 is detachably and tightly connected to the annular fitting groove 503 through the top connecting ring 802, and the outer treatment cylinder 8 can be removed as a whole to facilitate the loading of material powder into the annular storage interlayer 9 between the inner treatment cylinder 6 and the outer treatment cylinder 8. At this time, the annular piston 901 is located at the top of the annular storage interlayer 9. Then, the outer treatment cylinder 8 is connected and tightly installed with the treatment connecting ring 501 through the top connecting ring 802 and the annular fitting groove 503. Then, the unit treatment rod 5 is inserted into the interior of the leaching treatment kettle 2 as a whole, so that the unit treatment rod 5 is immersed in the solution inside the leaching treatment kettle 2, and then the unit treatment rod 5 can be pumped. The connecting rod 701 drives the pumping piston 7 to slide up and down along the inner treatment cylinder 6. When the pumping piston 7 slides downward, the liquid on the lower side of the inner treatment cylinder 6 can be forced to flow outward, so that the solution is transported to the annular storage interlayer 9 through the inner filter screen 601, and then transported to the leaching treatment kettle 2 through the outer filter screen 801 after contacting the material in the annular storage interlayer 9. At the same time, the solution in the leaching treatment kettle 2 is drawn into the annular storage interlayer 9 through the outer filter screen 801, and then transported to the inner treatment cylinder 6 on the upper side of the pumping piston 7 after contacting the material in the annular storage interlayer 9 through the inner treatment cylinder 6, thereby driving the pumping piston 7 to slide up and down along the inner treatment cylinder 6 through the pumping connecting rod 701. By moving, the solution can be continuously circulated through the annular material storage interlayer 9, which promotes the full contact between the solution and the material powder and improves the leaching efficiency. After a period of leaching work is completed, the annular piston 901 is driven by the vertical connecting rod 902 to slide downward along the annular material storage interlayer 9, and the closed bottom plate 604 simultaneously closes the bottom of the annular material storage interlayer 9, so that the material powder in the annular material storage interlayer 9 can be squeezed and compressed by the annular piston 901 and the closed bottom plate 604, which can effectively squeeze out the solution therein, avoid residue, improve the thoroughness of leaching, and improve the overall leaching extraction efficiency and effect. In addition, the raw materials are always constrained in the unit processing rod 5. , it is more convenient to process, and the unit processing rod 5 is designed as a unit structure, which is detachably connected to the leaching treatment kettle 2. After one unit processing rod 5 completes the leaching treatment, it can be quickly pulled out and disassembled, and another unit processing rod 5 filled with untreated materials can be inserted and installed for processing. The device is provided with multiple leaching treatment kettles 2 and multiple unit processing rods 5, each leaching treatment kettle 2 is filled with solutions of different concentrations, so that the unit processing rod 5 that has completed the treatment can be inserted into and installed in multiple leaching treatment kettles 2 in turn to carry out continuous leaching treatment work, thereby improving production efficiency, and also facilitating the disassembly and cleaning of the unit processing rod 5, making maintenance more convenient and quick.

[0045] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, preferably, a vertical support frame 506 is connected to the top of the processing connection ring 501 of the device, a driving connection frame 702 is connected to the top of the pumping connecting rod 701, a driving screw sleeve 703 is connected to the middle of the driving connection frame 702, a driving screw 507 is nested inside the driving screw sleeve 703, a driving motor 508 is connected to the axial end of the driving screw 507, and the driving motor 508 is fixedly connected to the vertical support frame 506, so that the driving motor 508 can drive the driving connection frame 702 to move up and down along the vertical support frame 506 through the driving screw 507 and the driving screw sleeve 703, and then the driving connection frame 702 drives the pumping piston 7 to move up and down synchronously through the pumping connecting rod 701, and the solution is continuously circulated through the annular material storage interlayer 9 through the cyclic up and down movement of the pumping piston 7, thereby promoting full contact between the solution and the material powder and improving the leaching efficiency.

[0046] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, preferably, a synchronous connecting frame 903 is connected to the top of the vertical connecting rod 902 of the device, and the synchronous connecting frame 903 is vertically slidably connected to the vertical support frame 506. The synchronous connecting frame 903 drives the annular piston 901 to move up and down synchronously through the vertical connecting rod 902. A horizontal sliding sleeve 904 is arranged in the middle of the synchronous connecting frame 903, and a linkage elastic pin 905 is nested and slidably arranged on the inner side of the horizontal sliding sleeve 904. A linkage slot 704 is arranged in the middle of the outer wall of the driving connecting frame 702. The linkage slot 704 and the linkage elastic pin 905 are arranged correspondingly to each other and the sizes are matched with each other. A locking electromagnet 705 is arranged in the middle of the linkage slot 704, so that when the leaching is completed and the raw material needs to be compressed, When the locking electromagnet 705 is energized, it generates magnetic force to attract the linkage elastic pin 905, which slides and embeds into the linkage slot 704, thereby connecting the synchronous connecting frame 903 and the driving connecting frame 702 through the linkage elastic pin 905. At this time, the driving motor 508 can drive the driving connecting frame 702 to move up and down along the vertical support frame 506 through the driving screw 507 and the driving screw sleeve 703, and then drive the synchronous connecting frame 903 to move up and down synchronously along the vertical support frame 506, so that the material powder in the annular material storage interlayer 9 can be squeezed and compressed by the annular piston 901, and the solution therein can be effectively squeezed out, thereby avoiding residue, improving the thoroughness of leaching, and improving the overall leaching extraction efficiency and effect. The overall structure is more reliable and compact.

[0047] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, preferably, the outer treatment cylinder 8 of the device is detachably and closedly connected to the annular interlocking groove 503 through the top connecting ring 802, so as to facilitate the disassembly of the outer treatment cylinder 8, and then facilitate the filling and unloading of the raw materials, and at the same time facilitate the cleaning and maintenance of the inner filter 601 and the outer filter 801, and the outer wall of the top connecting ring 802 is evenly connected with a plurality of interlocking connection blocks 803, and the middle of the side wall of the annular interlocking groove 503 is evenly connected with a plurality of interlocking connection grooves 504, the interlocking connection grooves 504 and the interlocking connection blocks 803 are arranged corresponding to each other and the sizes match each other, and the top of the interlocking connection groove 504 is connected with The rotation locking groove 505 and the interlocking connection block 803 are arranged corresponding to each other and the sizes are matched with each other, so that when the top connecting ring 802 slides vertically and is embedded in the annular interlocking groove 503, the interlocking connection block 803 thereon is also synchronously embedded in the interlocking connection groove 504, and then by rotating the top connecting ring 802, all the interlocking connection blocks 803 can be driven to rotate synchronously, so as to be rotated and embedded in the rotation locking groove 505, thereby realizing the locking of the top connecting ring 802, so that the external processing cylinder 8 can be quickly installed and disassembled through rotation and vertical movement, and the overall loading and unloading maintenance is more convenient and quick, and the overall structural reliability is also higher.

[0048] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10As shown, preferably, the device also includes a fixed base frame 1 connected to the bottom of the leaching treatment kettle 2, and a plurality of leaching treatment kettles 2, washing treatment kettles 202, unloading conveying cylinders 206 and filling storage cylinders 3 are connected and arranged in a circular shape and uniformly around the top of the fixed base frame 1. The tops of the washing treatment kettle 202, the unloading conveying cylinder 206 and the filling storage cylinder 3 are respectively provided with a washing installation port 203, a unloading installation port 207 and a filling installation port 301, and the sizes of the treatment connecting ring 501 and the leaching installation port 201, the washing installation port 203, the unloading installation port 207 and the filling installation port 301 are matched with each other, so that the unit treatment rod 5 can be cyclically inserted and installed in the plurality of leaching treatment kettles 2, the washing treatment kettle 202, the unloading conveying cylinder 206 and On the filler storage cylinder 3, multiple leaching, washing, unloading and filling processing operations are carried out in a cycle, which is beneficial to improving the overall production efficiency. The leaching processing kettle 2, the washing processing kettle 202, the unloading conveying cylinder 206 and the filler storage cylinder 3 are respectively provided with inlet and outlet pipes for loading and unloading. At the same time, the interior of the washing processing kettle 202 is provided with a piston bottom plate 204 that is slidably engaged. A lifting hydraulic rod 205 is connected to the bottom of the piston bottom plate 204. The lifting hydraulic rod 205 can drive the piston bottom plate 204 to move up and down to adjust the liquid level inside it, so as to lower the liquid level after washing is completed, so that the unit processing rod 5 does not contact the washing liquid, and the annular piston 901 is convenient for compressing and drying the washed raw materials and squeezing out the residual liquid therein.

[0049] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10As shown, preferably, a vertical guide frame 101 is connected to the center of the fixed base frame 1 of the device, a lifting guide rail 102 is arranged in the middle of the vertical guide frame 101, an annular connecting frame 104 is slidably connected to the middle of the lifting guide rail 102, a hydraulic telescopic rod 103 is connected to the lower part of the annular connecting frame 104, a rotary processing frame 105 is rotatably connected to the inner side of the annular connecting frame 104, a rotary gear ring 106 is arranged around the edge of the rotary processing frame 105, and a rotary gear ring 106 is meshed and connected to the outer side of the rotary gear ring 106. There is a rotary gear 107, and the shaft end of the rotary gear 107 is connected to a rotary motor 108, and the rotary motor 108 is fixedly connected to the annular connecting frame 104, so that the rotary motor 108 can drive the rotary processing frame 105 to rotate as a whole through the rotary gear ring 106 and the rotary gear 107, and the middle of the rotary processing frame 105 is evenly connected with a plurality of unit processing rods 5 in a circular shape, and the unit processing rods 5 are connected to the leaching installation port 201, the washing installation port 203, the unloading installation port 207 and the filling installation port 301. The unit treatment rods 5 are arranged correspondingly to each other, and the unit treatment rods 5 are vertically plugged and closed connected with the leaching installation port 201, the washing installation port 203, the unloading installation port 207 and the filling installation port 301 through the processing connection ring 501, so that the hydraulic telescopic rod 103 can drive the annular connecting frame 104 to move up and down along the lifting guide rail 102, thereby driving the rotary processing frame 105 and all the unit treatment rods 5 on it to move downward synchronously, so that the unit treatment rods 5 are respectively inserted and installed in the leaching installation port 201, the washing installation port 203, the unloading installation port 207, and the filling installation port 301. 7 and the filler installation port 301, or move upward to pull out and disassemble, and the rotary processing frame 105 can further drive all the unit processing rods 5 to rotate synchronously to adjust the position of the unit processing rods 5, and move the unit processing rods 5 in turn over multiple leaching processing kettles 2, washing processing kettles 202, unloading conveying cylinders 206 and filler storage cylinders 3, thereby realizing the automatic cycle loading and unloading movement of the unit processing rods 5, so as to cycle multiple leaching, washing, unloading and filling processing work, which is beneficial to improving the overall production efficiency.

[0050] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 and Fig.12As shown, preferably, a vertical guide sleeve 4 is provided at the bottom of the filler storage cylinder 3 of the device, a place-taking guide column 402 is provided in a nested sliding connection on the inner side of the vertical guide sleeve 4, the place-taking guide column 402 has the same diameter as the unit processing rod 5, the place-taking guide column 402 is located directly below the filler installation port 301 and the size of the place-taking guide column 402 matches the filler installation port 301, a rotating connection disk 405 is provided on the top surface of the place-taking guide column 402, a driving connection groove 407 is provided in the middle of the top surface of the rotating connection disk 405, a traction electromagnet 408 is provided in the middle of the driving connection groove 407, a magnetic connection block 805 is provided in the middle of the bottom surface of the closed bottom cover 804, and the magnetic connection The connecting block 805 and the driving connection groove 407 are arranged correspondingly and their sizes match each other, and a lifting rack 401 is vertically arranged in the middle of the inner wall of the vertical guide sleeve 4, and a lifting motor 403 is connected to the bottom of the position-occupying guide column 402, and a lifting gear 404 is connected to the shaft end of the lifting motor 403, and the lifting gear 404 and the lifting rack 401 are meshed with each other, and a rotating motor 406 is connected to the center of the rotating connecting disk 405, and the rotating motor 406 is fixedly connected to the position-occupying guide column 402, so that the lifting motor 403 can drive the position-occupying guide column 402 to move up and down as a whole through the lifting gear 404 and the lifting rack 401, and the filler storage The cylinder 3 is usually filled with raw material particles or powder, and the position-occupying guide column 402 is raised as a whole, and the top end passes through the filler installation port 301 to close it. When filling is required, the unit processing rod 5 is moved downward along the filler installation port 301 as a whole and inserted, and the position-occupying guide column 402 fits with the bottom of the unit processing rod 5 and moves downward synchronously with the unit processing rod 5, so that the unit processing rod 5 can be inserted into the raw material particles or powder filled in the filler storage cylinder 3. Then, the closed bottom cover 804 of the external processing cylinder 8 is connected to the rotating connection disk 405 through the magnetic connection block 805 and the drive connection groove 407. At this time, the rotating motor 406 is connected to the rotating disk 405 through the magnetic connection block 80 5 and the driving connection groove 407 drive the closed bottom cover 804 to drive the external processing cylinder 8 to rotate, and at the same time cooperate with the traction electromagnet 408 to energize and attract the magnetic connection block 805, so that the occupying guide column 402 drives the external processing cylinder 8 to move downward, so as to disassemble the external processing cylinder 8, and move the external processing cylinder 8 downward synchronously, so that the raw material particles or powder can be filled into the annular storage interlayer 9. After the filling is completed, the occupying guide column 402 drives the external processing cylinder 8 to move upward and reset, and drives the external processing cylinder 8 to rotate and install by rotating the connecting disk 405, and then the unit processing rod 5 is normally pulled out and disassembled, so as to complete the automatic filling of the entire raw material, which is beneficial to improve the overall production efficiency.

[0051] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 and Fig.12 As shown, preferably, the internal connection of the filler storage cylinder 3 of the device is provided with a vertical gas pipe 302, and the middle connection of the vertical gas pipe 302 is provided with a plurality of annular gas pipes 303, and the plurality of annular gas pipes 303 are evenly arranged along the vertical center line direction of the vertical gas pipe 302, and the annular gas pipes 303 are nested on the outside of the occupying guide column 402, and the outer side wall of the annular gas pipe 303 is evenly provided with a plurality of gas outlet openings 304, and the outer end of the vertical gas pipe 302 is connected with a pressurized gas The booster pump 305 can pump high-pressure gas into the annular gas pipe 303 through the vertical gas pipe 302, and blow it out evenly through the gas outlet opening 304, so as to improve the fluidity of the raw material particles or powder filled in the filling storage cylinder 3, facilitate the subsequent natural flow of the raw material particles or powder to fill the annular material storage interlayer 9 and the smooth movement of the external processing cylinder 8 and the occupying guide column 402, and can simultaneously stir and mix the raw material particles or powder to improve its uniformity, and at the same time The annular air pipe 303 is located above the raw material particles or powder. When the external processing cylinder 8 is moved upward for installation, the raw materials contaminated on its top connecting ring 802 can be cleaned by airflow to avoid affecting its subsequent connection and installation, and the overall reliability is higher. The unloading conveying cylinder 206 has a similar structure to the filler storage cylinder 3. Both are provided with a vertical guide sleeve 4 and a position guide column 402 to realize automatic loading and unloading of the external processing cylinder 8. At the same time, a rotating cleaning frame 208 is also provided inside the unloading conveying cylinder 206. The rotating cleaning frame 208 is located directly below the unloading installation port 207. When the unit processing rod 5 is inserted into the unloading conveying cylinder 206, it will be synchronously embedded in the middle of the rotating cleaning frame 208. The rotating cleaning frame 208 can rotate around the unit processing rod 5 as a whole, and a cleaning brush 209 is evenly arranged around the inner side of the rotating cleaning frame 208. The rotating cleaning frame 208 can drive the cleaning brush 209 to rotate synchronously to realize the cleaning of the external filter 801, the internal filter 601 and the residual raw materials inside.

[0052] When in use, first connect the corresponding relationship of the device, and then the rotary motor 108 drives the rotary processing frame 105 to rotate as a whole through the rotary gear ring 106 and the rotary gear 107, and at the same time cooperates with the hydraulic telescopic rod 103 to drive the annular connecting frame 104 to move up and down along the lifting guide rail 102, thereby driving the rotary processing frame 105 and all the unit processing rods 5 thereon to move synchronously, so that the unit processing rod 5 is inserted into the filling installation port 301. When the unit processing rod 5 moves downward along the filling installation port 301 as a whole, the occupying guide column 402 fits with the bottom of the unit processing rod 5 and moves downward synchronously with the unit processing rod 5, so that the unit processing rod 5 is inserted into the raw material particles or powder filled in the filling storage cylinder 3 as a whole, and at the same time, the closed bottom cover 804 of the outer processing cylinder 8 is opened. The outer processing tube 8 is connected to the rotating connection disk 405 through the magnetic connection block 805 and the driving connection groove 407. At this time, the rotating motor 406 drives the closed bottom cover 804 through the magnetic connection block 805 and the driving connection groove 407 to drive the outer processing tube 8 to rotate. At the same time, the traction electromagnet 408 is energized to adsorb the magnetic connection block 805, so that the occupier guide column 402 drives the outer processing tube 8 to move downward, so as to disassemble the outer processing tube 8, and the outer processing tube 8 is synchronously moved downward, so that the raw material particles or powder are filled into the annular storage interlayer 9. After the filling is completed, the occupier guide column 402 drives the outer processing tube 8 to move upward and reset, and drives the outer processing tube 8 to rotate and install through the rotating connection disk 405, and then the unit processing rod 5 and the occupier guide column 402 are synchronously Move upward until the unit processing rod 5 is pulled out and disassembled, completing the automatic filling of the raw materials, and then the rotary processing frame 105 drives the unit processing rod 5 to rotate to the top of the leaching processing kettle 2, and the unit processing rod 5 is moved downward and inserted into the leaching processing kettle 2 through the leaching installation port 201, and then the driving motor 508 drives the driving connecting frame 702 to move up and down along the vertical support frame 506 through the driving screw 507 and the driving screw sleeve 703, and then drives the connecting frame 702 to drive the pumping piston 7 to move up and down synchronously through the pumping connecting rod 701. When the pumping piston 7 slides downward, the liquid on the lower side of the inner processing cylinder 6 is pressed to flow outward, so that the solution is transported to the annular storage interlayer 9 through the inner filter screen 601, and after contacting with the material in the annular storage interlayer 9 Then it is transported to the leaching treatment kettle 2 through the outer filter 801. At the same time, the solution in the leaching treatment kettle 2 is drawn into the annular storage interlayer 9 through the outer filter 801. After the materials in the annular storage interlayer 9 come into contact, they are transported to the inner treatment cylinder 6 on the upper side of the pumping piston 7 through the inner treatment cylinder 6, so that the pumping connecting rod 701 drives the pumping piston 7 to slide up and down along the inner treatment cylinder 6, so that the solution continuously circulates through the annular storage interlayer 9 for leaching. After a period of leaching, the rotary processing frame 105 drives the unit processing rod 5 to lift, rotate and insert it into the next leaching treatment kettle 2, so that each leaching treatment kettle 2 is filled with solutions of different concentrations. The unit processing rod 5 is inserted and installed in multiple leaching treatment kettles 2 in turn to perform multiple continuous leaching treatments.When the unit processing rod 5 is inserted and installed in the washing treatment kettle 202, the raw material is washed by the circulating pumping of the pumping piston 7. After the washing is completed, the lifting hydraulic rod 205 drives the piston bottom plate 204 to move up and down to lower and adjust the liquid level inside the leaching treatment kettle 2 so that the unit processing rod 5 does not contact the washing liquid. At this time, the driving motor 508 drives the driving connecting frame 702 to move and be flush with the synchronous connecting frame 903 through the driving screw 507 and the driving screw sleeve 703, and then the locking electromagnet 705 is energized to generate magnetic force to adsorb the linkage elastic pin 905 to slide and embed into the linkage slot 704, and the synchronous connecting frame 903 and the driving connecting frame 702 are connected through the linkage elastic pin 905. At this time, the driving motor 508 drives the driving connecting frame 702 to move up and down along the vertical support frame 506 through the driving screw 507 and the driving screw sleeve 703. The rotating frame 105 drives the unit processing rod 5 to lift, rotate and insert it into the next unloading conveying cylinder 206. The rotating cleaning frame 208 rotates around the unit processing rod 5 as a whole, and drives the cleaning brush 209 to rotate synchronously, and cooperates with the position-occupying guide column 402 in the unloading conveying cylinder 206 to automatically remove the outer processing cylinder 8, so as to realize the cleaning of the outer filter 801, the inner filter 601 and the residual raw materials inside, thus completing the automatic filling of a unit processing rod 5, multiple leaching, washing and automatic unloading work, and continuously circulating the above process to complete the recovery and leaching of lithium iron phosphate powder.

[0053] The leaching processing device for recovering lithium from lithium iron phosphate powder and producing lithium carbonate provided by the present invention, during production, the material powder is filled into the annular material storage interlayer 9 between the inner processing cylinder 6 and the outer processing cylinder 8, and then the unit processing rod 5 is inserted into the interior of the leaching processing kettle 2 as a whole, and the solution is continuously circulated through the annular material storage interlayer 9 by the cyclic up and down movement of the pumping piston 7, which promotes the full contact between the solution and the material powder, improves the leaching efficiency, and after the leaching is completed, the material powder in the annular material storage interlayer 9 can be squeezed and compressed by the annular piston 901, which can effectively squeeze out the solution therein. Residue is avoided, the thoroughness of leaching is improved, and the overall leaching extraction efficiency and effect are better. The unit processing rod 5 is designed as a unit structure and is detachably connected to the leaching processing kettle 2. After one unit processing rod 5 completes the leaching treatment, it can be quickly pulled out and disassembled, and another unit processing rod 5 filled with untreated materials can be inserted and installed for treatment. The unit processing rod 5 that has completed the treatment can carry out subsequent unloading and refilling work, thereby facilitating continuous leaching treatment work and improving production efficiency. It is also convenient to disassemble and clean the unit processing rod 5, and maintenance is more convenient and quick.

[0054] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A leaching processing device for recovering lithium from lithium iron phosphate powder to produce lithium carbonate, comprising a leaching treatment kettle (2), wherein a leaching installation port (201) is arranged in the middle of the top of the leaching treatment kettle (2), It is characterized in that Also includes: A unit treatment rod (5) is embedded in the leaching treatment kettle (2), a treatment connection ring (501) is provided on the top of the unit treatment rod (5), the unit treatment rod (5) is detachably and closedly connected to the leaching installation port (201) through the treatment connection ring (501), and an annular embedding groove (503) is provided around the bottom surface of the treatment connection ring (501); An inner treatment cylinder (6) is vertically arranged at the center of the unit treatment rod (5); an inner filter screen (601) is arranged around the middle of the side wall of the inner treatment cylinder (6); a closed top cover (602) and a closed bottom plate (604) are arranged at the top and bottom of the inner treatment cylinder (6), respectively; and a closed sliding sleeve (603) is vertically arranged in the middle of the closed top cover (602); A pumping piston (7) is slidably mounted on the inner side of the inner treatment cylinder (6), a pumping connecting rod (701) is vertically connected to the top of the pumping piston (7), the pumping connecting rod (701) is nested and slidably connected to the closed sliding sleeve (603), and the pumping connecting rod (701) drives the pumping piston (7) to slide up and down along the inner treatment cylinder (6); An outer treatment cylinder (8) is nested and arranged on the outer side of the inner treatment cylinder (6); an outer filter screen (801) is arranged around the middle of the side wall of the outer treatment cylinder (8); a top connecting ring (802) and a closed bottom cover (804) are respectively arranged on the top and bottom of the outer treatment cylinder (8); the outer treatment cylinder (8) is detachably and closedly connected to the annular fitting groove (503) via the top connecting ring (802); An annular material storage interlayer (9) is arranged between the inner processing cylinder (6) and the outer processing cylinder (8); an annular piston (901) is slidably arranged in the middle of the annular material storage interlayer (9); a vertical connecting rod (902) is connected to the top surface of the annular piston (901); a guide sleeve (502) is vertically arranged in the middle of the processing connection ring (501); the vertical connecting rod (902) and the guide sleeve (502) are nested and slidably connected, and the vertical connecting rod (902) drives the annular piston (901) to slide up and down along the annular material storage interlayer (9).

2. The leaching processing device for recovering lithium from lithium iron phosphate powder to produce lithium carbonate according to claim 1, It is characterized in that A vertical support frame (506) is connected to the top of the processing connection ring (501), and a driving connection frame (702) is connected to the top of the pumping connecting rod (701). The driving connection frame (702) drives the pumping piston (7) to move up and down synchronously through the pumping connecting rod (701). A driving screw sleeve (703) is connected in the middle of the driving connection frame (702), and a driving screw rod (507) is nested inside the driving screw sleeve (703). The axial end of the driving screw rod (507) is connected to a driving motor (508), and the driving motor (508) is fixedly connected to the vertical support frame (506).

3. The leaching processing device for recovering lithium from lithium iron phosphate powder to produce lithium carbonate according to claim 2, It is characterized in that The top end of the vertical connecting rod (902) is connected with a synchronous connecting frame (903), and the synchronous connecting frame (903) is vertically slidably connected with the vertical supporting frame (506). The synchronous connecting frame (903) drives the annular piston (901) to move up and down synchronously through the vertical connecting rod (902). A horizontal sliding sleeve (904) is arranged in the middle of the synchronous connecting frame (903), and a linkage elastic pin (905) is nested and slidably arranged on the inner side of the horizontal sliding sleeve (904). A linkage groove (704) is arranged in the middle of the outer wall of the driving connecting frame (702). The linkage groove (704) and the linkage elastic pin (905) are arranged correspondingly to each other and their sizes match each other. A locking electromagnet (705) is arranged in the middle of the linkage groove (704). After the locking electromagnet (705) is energized, it generates magnetic force to attract the linkage elastic pin (905) to slide and embed into the linkage groove (704).

4. The leaching processing device for recovering lithium from lithium iron phosphate powder to produce lithium carbonate according to claim 1, It is characterized in that The outer side wall of the top connecting ring (802) is evenly and circumferentially connected with a plurality of engaging connecting blocks (803); the middle of the side wall of the annular engaging groove (503) is evenly and circumferentially connected with a plurality of engaging connecting grooves (504); the engaging connecting grooves (504) and the engaging connecting blocks (803) are arranged correspondingly to each other and their sizes match each other; the top end of the engaging connecting groove (504) is connected with a rotation locking groove (505); the rotation locking groove (505) and the engaging connecting blocks (803) are arranged correspondingly to each other and their sizes match each other.

5. The leaching processing device for recovering lithium from lithium iron phosphate powder to produce lithium carbonate according to claim 1, It is characterized in that The invention also comprises a fixed base frame (1) connected to the bottom of the leaching treatment kettle (2); a plurality of leaching treatment kettles (2), washing treatment kettles (202), unloading conveying cylinders (206) and filling storage cylinders (3) are connected and arranged in a circular shape and uniformly around the top of the fixed base frame (1); the tops of the washing treatment kettle (202), the unloading conveying cylinder (206) and the filling storage cylinder (3) are respectively provided with a washing installation port (203), a unloading installation port (207) and a filling installation port (301); and the sizes of the treatment connection ring (501) and the leaching installation port (201), the washing installation port (203), the unloading installation port (207) and the filling installation port (301) are matched with each other.

6. The leaching processing device for recovering lithium from lithium iron phosphate powder to produce lithium carbonate according to claim 5, It is characterized in that A vertical guide frame (101) is connected to the center of the fixed base frame (1), a lifting guide rail (102) is arranged in the middle of the vertical guide frame (101), an annular connecting frame (104) is slidably connected to the middle of the lifting guide rail (102), a hydraulic telescopic rod (103) is connected to the lower part of the annular connecting frame (104), a rotary processing frame (105) is rotatably connected to the inner side of the annular connecting frame (104), a rotary gear ring (106) is arranged around the edge of the rotary processing frame (105), a rotary gear (107) is meshingly connected to the outer side of the rotary gear ring (106), a rotary motor (108) is connected to the shaft end of the rotary gear (107), and the rotary motor (108) is fixedly connected to the annular connecting frame (104).

7. The leaching processing device for recovering lithium from lithium iron phosphate powder to produce lithium carbonate according to claim 6, It is characterized in that A plurality of unit processing rods (5) are evenly connected and arranged in a circular shape in the middle of the rotary processing frame (105); the unit processing rods (5) are arranged correspondingly to the leaching installation port (201), the washing installation port (203), the unloading installation port (207) and the filling installation port (301); and the unit processing rods (5) are vertically pluggably connected to the leaching installation port (201), the washing installation port (203), the unloading installation port (207) and the filling installation port (301) through a processing connection ring (501).

8. The leaching processing device for recovering lithium from lithium iron phosphate powder to produce lithium carbonate according to claim 1, It is characterized in that The bottom of the filler storage cylinder (3) is connected to a vertical guide sleeve (4), and the inner side of the vertical guide sleeve (4) is nested and slidably connected to a position-occupying guide column (402), and the position-occupying guide column (402) has the same diameter as the unit processing rod (5). The position-occupying guide column (402) is located directly below the filler installation port (301) and the size of the position-occupying guide column (402) and the filler installation port (301) are matched with each other. The top surface of the position-occupying guide column (402) is rotatably connected to a rotating connection disk (405), and a driving connection groove (407) is provided in the middle of the top surface of the rotating connection disk (405), and a traction electromagnet (408) is provided in the middle of the driving connection groove (407). A magnetic connection block (805) is provided in the middle of the bottom surface of the closed bottom cover (804), and the magnetic connection block (805) and the driving connection groove (407) are arranged corresponding to each other and the sizes are matched with each other.

9. The leaching processing device for recovering lithium from lithium iron phosphate powder to produce lithium carbonate according to claim 8, It is characterized in that A lifting rack (401) is vertically arranged in the middle of the inner wall of the vertical guide sleeve (4); a lifting motor (403) is connected to the bottom of the occupying guide column (402); a lifting gear (404) is connected to the shaft end of the lifting motor (403); the lifting gear (404) and the lifting rack (401) are meshed with each other; a rotating motor (406) is connected to the center of the rotating connecting disk (405); and the rotating motor (406) is fixedly connected to the occupying guide column (402).

10. The leaching processing device for recovering lithium from lithium iron phosphate powder to produce lithium carbonate according to claim 9, It is characterized in that The filler storage cylinder (3) is internally connected with a vertical gas pipe (302), and a plurality of annular gas pipes (303) are connected in the middle of the vertical gas pipe (302). The plurality of annular gas pipes (303) are evenly arranged along the vertical center line direction of the vertical gas pipe (302). The annular gas pipes (303) are nested on the outside of the occupying guide column (402), and a plurality of gas outlet openings (304) are evenly arranged on the outer side wall of the annular gas pipe (303). A booster air pump (305) is connected to the outer end of the vertical gas pipe (302).

Images