Device for recycling lithium from waste lithium battery and use method

Abstract

The invention relates to the field of waste lithium batteries, in particular to a device for recycling lithium from waste lithium batteries and a using method.The device comprises a box body, a blocking plate is slidably connected into the box body, a lifting frame is fixedly installed at the top end of the blocking plate, and four sets of leaching barrel assemblies are assembled on the blocking plate and the lifting frame; the lifting frame and the blocking plate are provided with a stirring assembly used for stirring leaching liquid, the telescopic end of a hydraulic cylinder penetrates through the support in a sliding mode and is fixedly connected with the lifting frame, and impurities filtered by the leaching barrel assembly can be recycled through an impurity recycling assembly. The dissolution speed of the leaching liquid to the metal material can be increased through the impurity recovery assembly; waste battery particles are placed in the leaching barrel main body, and then the leaching barrel main body is placed in the leaching liquid, so that impurities, which cannot be dissolved by the leaching liquid, in the waste battery particles are left in the leaching barrel main body, and after the dissolving work is completed, the obtained solution can be directly discharged, and the discharged solution does not need to be roughly filtered.

Description

Technical Field

[0001] The present invention relates to the field of waste lithium batteries, and in particular to a device for recovering lithium from waste lithium batteries and a method for using the device. Background Art

[0002] With the development of the times, lithium batteries are widely used in many industries such as the automotive industry. However, with the long-term use of lithium batteries, lithium batteries will suffer irreversible attenuation. After the capacity of the lithium battery decays to a certain extent, the lithium battery needs to be replaced, and the replaced waste lithium batteries need to be processed to prevent pollution to the environment.

[0003] When recycling waste lithium batteries, the first step is to use a crushing mechanism to crush the waste lithium batteries and crush them into battery particles of moderate size (0.1 to 5 mm); the second step is that the qualified battery particles enter the leaching box, where the battery particles and the leachate are fully mixed under the action of a stirring device, and the lithium element is leached from the battery particles into the solution; the third step is that the mixed solution after leaching enters the separation unit, and solid residues and impurities are removed by filtering equipment and centrifugal separators to obtain a pure lithium-containing solution, usually starting from coarse filtration (preliminary removal of battery crushing residues) and gradually moving to ultrafiltration; the fourth step is that the lithium-containing solution enters the lithium extraction unit, where lithium ions are adsorbed by ion exchange resins and eluted to obtain a high-concentration lithium-containing eluate; the fifth step is that the lithium-containing eluate enters the post-processing unit, and finally obtains a high-purity lithium product through evaporation, concentration and crystallization operations; some existing recovery devices are in use, combining the coarse filtration in the second and third steps above The fixed plate is rotated together, so that the impurities (particles visible to the naked eye) in the leachate are blocked by the filter plate and remain inside the membrane sleeve. The cleaner leachate will flow out of the membrane sleeve through the filter plate. Through the continuous rotation of the fixed plate, more and more impurities will be filtered by the filter plate and remain inside the membrane sleeve, and finally be taken out of the leachate by the lifting of the fixed plate, reducing the impact of impurities on the subsequent treatment of the solution. That is, after the battery particles and the leachate are stirred, the stirring mechanism drives the leachate, and after the stirring mechanism leaves the leachate, it will take the filtered impurities out of the leachate together. However, in practice, when the stirring mechanism is stirring, under the action of stirring, the battery particles and impurities will enter the membrane sleeve together, which will cause some battery particles to be mixed and squeezed together with the impurities, which will cause the leachate to be unable to effectively react with these battery particles. For this reason, we propose a device and method for recovering lithium from waste lithium batteries. Summary of the Invention

[0004] The object of the present invention is to provide a device for recovering lithium from waste lithium batteries, comprising a box body, a blocking plate being slidably connected to the box body, a lifting frame being fixedly installed on the top of the blocking plate, four groups of leaching cylinder assemblies being assembled on the blocking plate and the lifting frame, a stirring assembly for stirring the leachate being installed on the lifting frame and the blocking plate, the telescopic end of the hydraulic cylinder slidingly passing through the bracket and being fixedly connected to the lifting frame, the impurities filtered out by the leaching cylinder assembly being recoverable through the impurity recovery assembly, and the impurity recovery assembly being used to accelerate the dissolution rate of the metal material by the leachate.

[0005] Preferably: the leaching cylinder assembly includes a leaching cylinder body, the leaching cylinder body is fixedly installed at the bottom of the blocking plate, a plurality of leaching plates are fixedly installed on the leaching cylinder body, through holes with a diameter less than 0.1 mm are evenly opened on the leaching plates, a feeding pipe is connected to the top of the leaching plate, a feeding hopper is provided on the top of the feeding pipe, the feeding pipe passes through the inner side of the blocking plate and the inner side of the lifting frame, the leaching cylinder body and the blocking plate are rotatably connected to the stirring shaft through a sealed bearing, and a plurality of stirring blades are fixedly installed on the outer wall of the stirring shaft.

[0006] Preferably: the stirring assembly includes a stirring main shaft and four groups of stirring secondary shafts, the stirring main shaft and the four groups of stirring secondary shafts are rotatably connected to the blocking plate and the lifting frame through sealed bearings, the top end of the stirring main shaft is fixedly connected to the driving end of the reducer through a coupling, the reducer is fixedly installed on the lifting frame, multiple groups of main stirring blades are fixedly installed on the outer wall of the stirring main shaft, multiple groups of secondary stirring blades are fixedly installed on the outer walls of the four groups of stirring secondary shafts, a large gear is fixedly installed on the outer wall of the stirring main shaft, the large gear meshes with four groups of small gears, the four groups of small gears are respectively fixedly installed on the outer walls of the four groups of stirring shafts, the four groups of stirring shafts correspond to one group of stirring secondary shafts respectively, a group of sprockets are fixedly installed on the outer wall of the stirring secondary shaft and the outer wall of the corresponding stirring shaft, and the two groups of sprockets are meshed with chains.

[0007] Preferably: the impurity recovery component includes an industrial vacuum cleaner, the dust suction port of the industrial vacuum cleaner is connected to a dust suction pipe, two sets of connecting parts are fixedly installed between the dust suction pipe and the bracket, the four pipe openings below the dust suction pipe are respectively connected to four sets of dust suction nozzles, the air outlet of the industrial vacuum cleaner is connected to an air outlet pipe, the air outlet pipe is connected to multiple sets of pipes, a group of fixing blocks are fixedly installed on the outer wall of the pipe, the fixing blocks are fixedly installed on the outer wall of the box, and the bent end of the lower end of the pipe is connected to the box.

[0008] Preferably, two groups of guide rods are fixedly installed on the top of the lifting frame, and both groups of guide rods slide through the inner side of the bracket, and a limiting ring 1 and a limiting ring 2 are fixedly installed on the outer wall of the guide rod.

[0009] Preferably, the bracket is fixedly mounted on the top of the base, and the industrial vacuum cleaner is fixedly mounted on the top of the base.

[0010] Preferably, a plurality of support columns are fixedly mounted on the bottom of the box body, and the support columns are fixedly mounted on the top of the base. The bottom of the box body is connected to a drain pipe, and the drain pipe is equipped with a valve.

[0011] Preferably, the four groups of dust collection nozzles are respectively located above the four groups of feeding hoppers, and the inner wall size of the dust collection nozzles matches the outer wall size of the feeding hoppers.

[0012] Preferably, a sealing ring is embedded and installed on the outer wall of the blocking plate, and the sealing ring slides and fits the inner wall of the box.

[0013] The present invention also proposes a method for recovering lithium from waste lithium batteries, which is characterized by comprising the following specific steps:

[0014] S1. When in use, add an appropriate amount of leachate through a set of feeding hoppers, and the leachate enters the leaching cylinder body along the feeding pipe. Then the leachate flows into the inner cavity of the box through the through-holes on the leaching plate. Then, add an appropriate amount of waste lithium battery particles of appropriate size (0.1-5 mm) into the four sets of leaching cylinder bodies from four sets of feeding hoppers respectively;

[0015] S2. Waste lithium battery particles will enter the leachate, and the leachate will dissolve the metal material in the waste lithium battery particles. At the same time, the leachate is stirred by the stirring component, and the stirring component will drive the stirring blades to stir the old lithium battery particles in the leaching tube body when working, thereby accelerating the dissolution rate. At the same time, the industrial vacuum cleaner is started, and the air and dust overflowing from the feeding hopper can be absorbed through the four sets of dust suction nozzles. At this time, there is a cavity between the dust suction nozzle and the feeding hopper, so that the suction force generated by the industrial vacuum cleaner cannot suck out the battery particles in the leaching tube body, and the air discharged by the industrial vacuum cleaner is discharged into the leachate through the air outlet pipe and multiple sets of pipes. The bubbles formed will stir the leachate, accelerate the dissolution rate of the metal material by the leachate, and make the dissolution of the metal material more sufficient;

[0016] S3. When the dissolution work is completed, the impurities that cannot be dissolved will remain in the leaching tube body. The hydraulic cylinder is started to drive the blocking plate and the lifting frame to move upward. The upward movement of the lifting frame will drive the leaching tube body to move upward. At the same time, the valve on the drain pipe is opened to discharge the liquid in the box. At this time, the leaching tube body is separated from the liquid. Then, the stirring component drives the stirring blade to stir the impurities in the leaching tube body for a period of time, so that the liquid in the leaching tube body is discharged through the through hole. At this time, the feeding hopper will be inserted into the dust nozzle, and the outer wall of the feeding hopper will fit the inner side of the dust nozzle. At this time, starting the industrial vacuum cleaner will directly extract the air in the leaching tube body, and then the impurities remaining in the leaching tube body can be absorbed and processed.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention places waste battery particles into a leaching cylinder main body, and then places the leaching cylinder main body into the leachate, so that impurities in the waste battery particles that cannot be dissolved by the leachate will remain in the leaching cylinder main body, so that after the dissolution work is completed, the obtained solution can be directly discharged, and the discharged solution does not need to be coarsely filtered; and during the dissolution work, the main stirring blade and the secondary stirring blade are driven by the speed reducer at the same time to stir the leachate in the box, and the main stirring blade and the secondary stirring blade rotate in opposite directions, thereby generating more complex turbulence in the box, promoting the mixing of fluids in different areas, reducing dead zones, and allowing the leachate to better dissolve the waste lithium battery particles in the leaching cylinder, and at this time, the stirring blade is driven by the speed reducer to rotate, and the old lithium battery particles in the leaching cylinder main body are stirred by the stirring blade, and the dissolution speed is accelerated by stirring the battery particles and stirring the leachate.

[0019] 2. During the dissolution process, the present invention uses an industrial vacuum cleaner to generate suction through the four groups of dust nozzles. The four groups of dust nozzles can absorb the air and dust overflowing from the feeding hopper to prevent dust from contaminating the cavity. The air discharged by the industrial vacuum cleaner is discharged into the leachate through the air outlet pipe and multiple groups of pipes. The bubbles formed will stir the leachate, accelerate the dissolution rate of the metal material by the leachate, and make the dissolution of the metal material more sufficient. When the dissolution work is completed, the impurities that cannot be dissolved will remain in the leaching tube body. At this time, the feeding hopper will be inserted into the dust nozzle. At this time, starting the industrial vacuum cleaner will directly extract the air in the leaching tube body, and then the impurities remaining in the leaching tube body can be absorbed and processed. The industrial vacuum cleaner can be used to effectively recover the impurities that cannot be dissolved, and the recovery is convenient without disassembling the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a structural schematic diagram of the present invention from another angle;

[0022] Figure 3 Schematic diagram inside the box;

[0023] Figure 4 Schematic diagram of part of the structure of the present invention Figure 1 ;

[0024] Figure 5 Schematic diagram of part of the structure of the present invention Figure 2 ;

[0025] Figure 6 for Figure 5 Structural diagram from another angle;

[0026] Figure 7It is a schematic diagram of the inside of the leaching cylinder;

[0027] Figure 8 This is a schematic diagram of the combination of the feeding hopper and the dust nozzle.

[0028] In the figure: 1. Box; 2. Blocking plate; 3. Lifting frame; 4. Leaching cylinder assembly; 401. Leaching cylinder body; 402. Leaching plate; 403. Feeding pipe; 404. Feeding hopper; 405. Stirring shaft; 406. Stirring blade; 5. Stirring assembly; 501. Stirring main shaft; 502. Stirring secondary shaft; 503. Reducer; 504. Main stirring blade; 505. Secondary stirring blade; 506. Large gear; 507. Small gear Wheel; 508, sprocket; 509, chain; 6, hydraulic cylinder; 7, bracket; 8, impurity recovery component; 801, industrial vacuum cleaner; 802, vacuum tube; 803, connector; 804, vacuum nozzle; 805, exhaust pipe; 806, pipeline; 807, fixing block; 9, guide rod; 10, limit ring 1; 11, limit ring 2; 12, base; 13, support column; 14, drain pipe; 15, sealing ring. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Reference Figure 1 - Figure 8 The present invention discloses a device for recovering lithium from waste lithium batteries, comprising a box body 1, a blocking plate 2 being slidably connected inside the box body 1, a lifting frame 3 being fixedly installed on the top of the blocking plate 2, four groups of leaching barrel assemblies 4 being assembled on the blocking plate 2 and the lifting frame 3, a stirring assembly 5 for stirring the leachate being installed on the lifting frame 3 and the blocking plate 2, a telescopic end of a hydraulic cylinder 6 slidingly passing through a bracket 7 and fixedly connected to the lifting frame 3, impurities filtered out by the leaching barrel assembly 4 can be recovered by an impurity recovery assembly 8, and the impurity recovery assembly 8 can accelerate the dissolution rate of the metal material by the leachate.

[0031] The leaching cylinder assembly 4 includes a leaching cylinder body 401, which is fixedly installed at the bottom of the blocking plate 2. A plurality of leaching plates 402 are fixedly installed on the leaching cylinder body 401. The leaching plates 402 are evenly provided with through holes with a diameter less than 0.1 mm. A feeding pipe 403 is connected to the top of the leaching plate 402. A feeding hopper 404 is provided on the top of the feeding pipe 403. The feeding pipe 403 passes through the inner side of the blocking plate 2 and the inner side of the lifting frame 3. The leaching cylinder body 401 and the blocking plate 2 are rotatably connected to the stirring shaft 405 through a sealed bearing. A plurality of stirring blades 406 are fixedly installed on the outer wall of the stirring shaft 405. When in use, the stirring shaft 405 rotates to drive the stirring blades 406 to rotate, and the stirring blades 406 can stir the waste lithium battery particles in the leaching cylinder body 401.

[0032] The stirring assembly 5 includes a stirring main shaft 501 and four groups of stirring secondary shafts 502. The stirring main shaft 501 and the four groups of stirring secondary shafts 502 are rotatably connected to the blocking plate 2 and the lifting frame 3 through sealed bearings. The top of the stirring main shaft 501 is fixedly connected to the driving end of the reducer 503 through a coupling. The reducer 503 is fixedly installed on the lifting frame 3. Multiple groups of main stirring blades 504 are fixedly installed on the outer wall of the stirring main shaft 501. Multiple groups of secondary stirring blades 505 are fixedly installed on the outer walls of the four groups of stirring secondary shafts 502. A large gear 506 is fixedly installed on the outer wall of the stirring main shaft 501. The large gear 506 meshes with four groups of small gears 507. The four groups of pinions 507 are respectively fixedly mounted on the outer walls of the four groups of stirring shafts 405, and the four groups of stirring shafts 405 correspond to a group of stirring secondary shafts 502. A group of sprockets 508 are respectively fixedly mounted on the outer walls of the stirring secondary shafts 502 and the outer walls of the corresponding stirring shafts 405, and both groups of sprockets 508 are engaged with chains 509. When in use, the main stirring blades 504 and the secondary stirring blades 505 can be driven to rotate by the reducer 503, so that the leachate in the box body 1 can be stirred by the main stirring blades 504 and the secondary stirring blades 505, so that the leachate can better dissolve the waste lithium battery particles in the leaching cylinder main body 401.

[0033] The impurity recovery component 8 includes an industrial vacuum cleaner 801, the dust suction port of the industrial vacuum cleaner 801 is connected to a dust suction pipe 802, two groups of connecting parts 803 are fixedly installed between the dust suction pipe 802 and the bracket 7, the four pipe openings below the dust suction pipe 802 are respectively connected to four groups of dust suction nozzles 804, the air outlet of the industrial vacuum cleaner 801 is connected to an air outlet pipe 805, and the air outlet pipe 805 is connected to multiple groups of pipes 806, and a group of fixing blocks 807 are fixedly installed on the outer wall of the box 1, and the bent end of the lower end of the pipe 806 is connected to the box 1; when in use, the impurity recovery component 8 can be used to recover the impurities remaining in the leaching cylinder body 401 after dissolution, and during the dissolution work, the bubbles formed by the leachate in the box 1 can be stirred by the impurity recovery component 8, thereby accelerating the dissolution rate of the metal material by the leachate, making the dissolution of the metal material more sufficient.

[0034] Two sets of guide rods 9 are fixedly installed on the top of the lifting frame 3. Both sets of guide rods 9 slide through the inner side of the bracket 7. A limit ring 10 and a limit ring 2 11 are fixedly installed on the outer wall of the guide rods 9. The guide rods 9 provide guidance for the up and down movement of the lifting frame 3. When dissolving, the limit ring 2 11 contacts the bracket 7. When the impurities remaining in the leaching cylinder body 401 are recovered after dissolution, the limit ring 10 contacts the bracket.

[0035] The bracket 7 is fixedly mounted on the top of the base 12, and the industrial vacuum cleaner 801 is fixedly mounted on the top of the base 12, so that the device installation structure is stable.

[0036] A plurality of support columns 13 are fixedly mounted on the bottom of the box body 1, and the support columns 13 are fixedly mounted on the top of the base 12. A drain pipe 14 is connected to the bottom of the box body 1, and a valve is assembled on the drain pipe 14. When the dissolution work is completed, the valve on the drain pipe 14 is opened to discharge the dissolved liquid so that the next step of the work on the obtained solution can be carried out.

[0037] The four groups of dust collection nozzles 804 are respectively located above the four groups of feeding hoppers 404. The inner wall size of the dust collection nozzles 804 matches the outer wall size of the feeding hoppers 404, so that the dust collection nozzles 804 and the feeding hoppers 404 can be effectively combined together.

[0038] A sealing ring 15 is embedded and installed on the outer wall of the blocking plate 2, and the sealing ring 15 slides and fits the inner wall of the box body 1; through the sealing ring 15, the blocking plate 2 and the box body 1 maintain a good sealing effect.

[0039] The present invention also proposes a method for recovering lithium from waste lithium batteries, which is characterized by comprising the following specific steps:

[0040] S1. When in use, an appropriate amount of leachate is added through a set of feeding hoppers 404. The leachate flows into the leaching cylinder body 401 along the feeding pipe 403. The leachate then flows into the inner cavity of the box 1 through the through-holes on the leaching plate 402. Then, an appropriate amount of waste lithium battery particles of appropriate size (0.1-5 mm) is added to the four sets of leaching cylinder bodies 401 from the four sets of feeding hoppers 404 respectively;

[0041] S2. The waste lithium battery particles will enter the leachate, and the leachate will dissolve the metal material in the waste lithium battery particles. At the same time, the leachate is stirred by the stirring component 5, and the stirring component 5 will drive the stirring blades 406 to stir the old lithium battery particles in the leaching tube body 401 when working, thereby accelerating the dissolution rate. At the same time, the industrial vacuum cleaner 801 is started, and the air and dust overflowing from the feeding hopper 404 can be absorbed by the four sets of dust suction nozzles 804. At this time, there is a cavity between the dust suction nozzle 804 and the feeding hopper 404, so that the suction force generated by the industrial vacuum cleaner 801 cannot suck out the battery particles in the leaching tube body 401, and the air discharged by the industrial vacuum cleaner 801 is discharged into the leachate through the air outlet pipe 805 and the multiple sets of pipes 806. The bubbles formed will stir the leachate, accelerate the dissolution rate of the metal material by the leachate, and make the dissolution of the metal material more sufficient;

[0042] S3. When the dissolution work is completed, the impurities that cannot be dissolved will remain in the leaching tube body 401. The hydraulic cylinder 6 is started to drive the blocking plate 2 and the lifting frame 3 to move upward. The upward movement of the lifting frame 3 will drive the leaching tube body 401 to move upward. At the same time, the valve on the drain pipe 14 is opened to discharge the liquid in the box 1. At this time, the leaching tube body 401 is separated from the liquid, and then the stirring component 5 drives the stirring blade 406 to stir the impurities in the leaching tube body 401 for a period of time, so that the liquid in the leaching tube body 401 is discharged through the through hole. At this time, the feeding hopper 404 will be inserted into the dust suction nozzle 804, and the outer wall of the feeding hopper 404 will fit the inner side of the dust suction nozzle 804. At this time, starting the industrial vacuum cleaner 801 will directly extract the air in the leaching tube body 401, and then the impurities remaining in the leaching tube body 401 can be absorbed and processed.

[0043] The working principle of the present invention is as follows: when in use, the limiting ring 11 contacts the bracket 7, and there is a cavity between the dust suction nozzle 804 and the feeding hopper 404. An appropriate amount of leachate is added through one group of feeding hoppers 404, and the leachate enters the leaching tube body 401 along the feeding pipe 403. Then, the leachate flows into the inner cavity of the box 1 through the through hole on the leaching plate 402. Then, an appropriate amount of waste lithium battery particles of appropriate size (0.1 to 5 mm) is added to the four groups of leaching tube bodies 401 from the four groups of feeding hoppers 404 respectively;

[0044] The waste lithium battery particles will enter the leachate, and the leachate will dissolve the metal materials in the waste lithium battery particles. At the same time, starting the reducer 503 will drive the stirring main shaft 501 to rotate, and the rotation of the stirring main shaft 501 will drive the large gear 506 to rotate, and the rotation of the large gear 506 will drive the four sets of small gears 507 to rotate, and the rotation of the four sets of small gears 507 will drive the four sets of stirring shafts 405 to rotate, and the stirring shaft 405 will rotate and drive the two sets of sprockets 508 and the chain 509, which will drive the stirring secondary shaft 502 to rotate, and the rotation of the stirring main shaft 501 will drive the main stirring blade 504 to rotate, and the stirring secondary shaft 502 will rotate. The rotation of the stirring shaft 405 drives the secondary stirring blade 505 to rotate, so that the leachate in the box body 1 can be stirred by the main stirring blade 504 and the secondary stirring blade 505, and the main stirring blade 504 and the secondary stirring blade 505 rotate in opposite directions, generating a more complex turbulence in the box body 1, promoting the mixing of fluids in different areas, reducing dead zones, and allowing the leachate to better dissolve the waste lithium battery particles in the leaching tube main body 401. At this time, the rotation of the stirring shaft 405 drives the stirring blade 406 to rotate, and the old lithium battery particles in the leaching tube main body 401 are stirred by the stirring blade 406, and the dissolution speed is accelerated by stirring the battery particles and stirring the leachate.

[0045] During the dissolution process, the industrial vacuum cleaner 801 is started and the four sets of vacuum nozzles 804 generate suction through the vacuum pipe 802, and the four sets of vacuum nozzles 804 are respectively located above the four sets of feeding hoppers 404. The air and dust overflowing from the feeding hoppers 404 can be absorbed by the four sets of vacuum nozzles 804. At this time, there is a cavity between the vacuum nozzles 804 and the feeding hoppers 404, so that the suction generated by the industrial vacuum cleaner 801 cannot suck out the battery particles in the leaching tube body 401, and the air discharged by the industrial vacuum cleaner 801 is discharged into the leachate through the air outlet pipe 805 and the multiple sets of pipes 806. The bubbles formed will stir the leachate, accelerate the dissolution rate of the metal material by the leachate, and make the dissolution of the metal material more complete;

[0046] When the dissolution work is completed, the impurities that cannot be dissolved will remain in the leaching tube body 401, and the hydraulic cylinder 6 is started to drive the blocking plate 2 and the lifting frame 3 to move upward. The upward movement of the lifting frame 3 will drive the leaching tube body 401 to move upward, and at the same time, the valve on the drain pipe 14 is opened to discharge the liquid in the box 1. At this time, the leaching tube body 401 is separated from the liquid, and then the stirring component 5 drives the stirring blade 406 to stir the impurities in the leaching tube body 401 for a period of time, so that the liquid in the leaching tube body 401 is completely discharged through the through hole, and at this time the feeding hopper 404 will be inserted into the dust suction nozzle 804, and the outer wall of the feeding hopper 404 will fit the inner side of the dust suction nozzle 804 (as shown in the attached figure). Figure 8As shown), starting the industrial vacuum cleaner 801 at this time will directly extract the air in the leaching cylinder body 401, and then absorb and treat the impurities remaining in the leaching cylinder body 401, and effectively recover the insoluble impurities through the industrial vacuum cleaner 801.

[0047] It should be noted that the reducer 503, industrial vacuum cleaner 801 and hydraulic cylinder 6 in the present invention are all existing technologies, and the reducer 503 needs to be connected to a suitable power supply through its dedicated controller when in use. The industrial vacuum cleaner 801 reducer 503 needs to be connected to a suitable power supply through its dedicated controller when in use. Here, the hydraulic cylinder 6 needs to be used in conjunction with a special hydraulic pump, hydraulic pipeline, etc. when in use.

[0048] The above content is a further detailed description of the present invention in conjunction with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions or substitutions without departing from the concept of the present invention, which should be regarded as falling within the scope of protection determined by the claims submitted for the present invention.

Claims

1. A device for recovering lithium from waste lithium batteries, comprising a housing (1), characterized in that: A blocking plate (2) is slidably connected in the box body (1), a lifting frame (3) is fixedly installed on the top of the blocking plate (2), four groups of leaching cylinder assemblies (4) are assembled on the blocking plate (2) and the lifting frame (3), a stirring assembly (5) for stirring the leachate is installed on the lifting frame (3) and the blocking plate (2), the telescopic end of the hydraulic cylinder (6) slides through the bracket (7) and is fixedly connected to the lifting frame (3), and impurities filtered out by the leaching cylinder assembly (4) can be recovered through the impurity recovery assembly (8), and the dissolution rate of the metal material by the leachate can be accelerated by the impurity recovery assembly (8).

2. The device for recovering lithium from waste lithium batteries according to claim 1, wherein: The leaching tube assembly (4) includes a leaching tube body (401), which is fixedly mounted on the bottom of the blocking plate (2). A plurality of leaching plates (402) are fixedly mounted on the leaching tube body (401), and the leaching plates (402) are evenly provided with through holes with a diameter less than 0.1 mm. The top of the leaching plate (402) is connected to a feeding pipe (403), and a feeding hopper (404) is provided on the top of the feeding pipe (403). The feeding pipe (403) passes through the inner side of the blocking plate (2) and the inner side of the lifting frame (3). The leaching tube body (401) and the blocking plate (2) are both rotatably connected to a stirring shaft (405) through a sealed bearing, and a plurality of stirring blades (406) are fixedly mounted on the outer wall of the stirring shaft (405).

3. The device for recovering lithium from waste lithium batteries according to claim 1, wherein: The stirring assembly (5) comprises a stirring main shaft (501) and four groups of stirring secondary shafts (502), the stirring main shaft (501) and the four groups of stirring secondary shafts (502) are rotatably connected to the blocking plate (2) and the lifting frame (3) through sealed bearings, the top end of the stirring main shaft (501) is fixedly connected to the driving end of the speed reducer (503) through a coupling, the speed reducer (503) is fixedly mounted on the lifting frame (3), the outer wall of the stirring main shaft (501) is fixedly mounted with multiple groups of main stirring blades (504), and the outer walls of the four groups of stirring secondary shafts (502) are fixedly mounted with multiple groups of A secondary stirring blade (505) is fixedly mounted on the outer wall of the stirring main shaft (501), and the large gear (506) is engaged with four groups of small gears (507). The four groups of small gears (507) are respectively fixedly mounted on the outer walls of four groups of stirring shafts (405). The four groups of stirring shafts (405) correspond to one group of secondary stirring shafts (502). A group of sprockets (508) is respectively fixedly mounted on the outer wall of the secondary stirring shaft (502) and the outer wall of the corresponding stirring shaft (405). Both groups of sprockets (508) are engaged with chains (509).

4. The device for recovering lithium from waste lithium batteries according to claim 1, wherein: The impurity recovery component (8) includes an industrial vacuum cleaner (801), the suction port of the industrial vacuum cleaner (801) is connected to a suction pipe (802), two groups of connectors (803) are fixedly installed between the suction pipe (802) and the bracket (7), four pipe openings below the suction pipe (802) are respectively connected to four groups of suction nozzles (804), the air outlet of the industrial vacuum cleaner (801) is connected to an air outlet pipe (805), the air outlet pipe (805) is connected to multiple groups of pipes (806), the outer wall of each pipe (806) is fixedly installed with a group of fixing blocks (807), the fixing blocks (807) are fixedly installed on the outer wall of the box (1), and the bent end of the lower end of the pipe (806) is connected to the box (1).

5. The device for recovering lithium from waste lithium batteries according to claim 1, wherein: Two groups of guide rods (9) are fixedly installed on the top of the lifting frame (3), and the two groups of guide rods (9) slide through the inner side of the bracket (7). A limiting ring 1 (10) and a limiting ring 2 (11) are fixedly installed on the outer wall of the guide rod (9).

6. The device for recovering lithium from waste lithium batteries according to claim 5, characterized in that: The bracket (7) is fixedly mounted on the top of the base (12), and the industrial vacuum cleaner (801) is fixedly mounted on the top of the base (12).

7. The device for recovering lithium from waste lithium batteries according to claim 1, wherein: A plurality of support columns (13) are fixedly mounted on the bottom of the box body (1), and the support columns (13) are fixedly mounted on the top of the base (12). A drainage pipe (14) is connected to the bottom of the box body (1), and a valve is installed on the drainage pipe (14).

8. The device for recovering lithium from waste lithium batteries according to claim 4, wherein: The four groups of dust collection nozzles (804) are respectively located above the four groups of feeding hoppers (404), and the inner wall size of the dust collection nozzles (804) matches the outer wall size of the feeding hoppers (404).

9. The device for recovering lithium from waste lithium batteries according to claim 1, wherein: A sealing ring (15) is embedded and installed on the outer wall of the blocking plate (2), and the sealing ring (15) is slidably fitted on the inner wall of the box body (1).

10. A device for recovering lithium from waste lithium batteries according to any one of claims 1 to 9, the present invention also provides a method for recovering lithium from waste lithium batteries, characterized in that: The specific steps include: S1. When in use, a proper amount of leachate is added through a group of feeding hoppers (404), and the leachate enters the leaching cylinder body (401) along the feeding pipe (403). Then, the leachate flows into the inner cavity of the box body (1) through the through hole on the leaching plate (402). Then, a proper amount of waste lithium battery particles of appropriate size (0.1 to 5 mm) is added to the four groups of leaching cylinder bodies (401) from the four groups of feeding hoppers (404). S2, waste lithium battery particles will enter the leachate, waste lithium battery particles will enter the leachate, the leachate dissolves the metal material in the waste lithium battery particles, at the same time, the leachate is stirred by the stirring component (5), and the stirring component (5) will drive the stirring blade (406) to stir the old lithium battery particles in the leaching tube body (401) when working, thereby accelerating the dissolution speed, at the same time, the industrial vacuum cleaner (801) is started, and the feeding can be stirred by the four sets of suction nozzles (804). The air and dust overflowed from the hopper (404) are absorbed. At this time, there is a cavity between the dust suction nozzle (804) and the feeding hopper (404), so that the suction force generated by the industrial vacuum cleaner (801) cannot suck out the battery particles in the leaching tube body (401), and the air discharged by the industrial vacuum cleaner (801) is discharged into the leachate through the air outlet pipe (805) and the multiple groups of pipes (806). The bubbles formed will stir the leachate, accelerate the dissolution speed of the metal material by the leachate, and make the dissolution of the metal material more complete; S3. When the dissolution work is completed, the impurities that cannot be dissolved will remain in the leaching tube body (401). The hydraulic cylinder (6) is started to drive the blocking plate (2) and the lifting frame (3) to move upward. The upward movement of the lifting frame (3) will drive the leaching tube body (401) to move upward. At the same time, the valve on the drain pipe (14) is opened to discharge the liquid in the box (1). At this time, the leaching tube body (401) is separated from the liquid. Then, the stirring component (5) drives the stirring blade (406) to stir the impurities in the leaching tube body (401) for a period of time, so that the liquid in the leaching tube body (401) is completely discharged through the through hole. At this time, the feeding hopper (404) will be inserted into the dust suction nozzle (804), and the outer wall of the feeding hopper (404) will fit the inner side of the dust suction nozzle (804). At this time, starting the industrial vacuum cleaner (801) will directly extract the air in the leaching tube body (401), and then the impurities remaining in the leaching tube body (401) can be absorbed and processed.

Images