A continuous leaching device and method for recovering lithium from waste lithium batteries

Abstract

The invention discloses a continuous leaching device and method for recovering lithium from waste lithium batteries, and specifically relates to the field of waste lithium battery recovery. The invention comprises a base, a leaching barrel is fixedly mounted on the top of the base, a partition lifting mechanism and a bottom sealing mechanism are arranged inside the leaching barrel, the partition lifting mechanism comprises a plurality of partitions fixedly mounted on the inner wall of the leaching barrel, the plurality of partitions are arranged in a ring-shaped manner and equidistantly on the inner circumferential surface of the leaching barrel, and the plurality of partitions are fitted with the inner wall of the leaching barrel; the invention arranges a plurality of partitions in the leaching barrel, and then arranges a lifting plate on one side of the partition to send the lithium battery waste leached on the previous side to the next partition area, that is, to perform continuous secondary leaching treatment, thereby avoiding the influence of traditional single leaching treatment on the leaching effect, and increasing the leaching rate of the lithium battery waste by a stirring mechanism, thereby improving the leaching efficiency of the lithium battery waste.

Description

Technical Field

[0001] The present invention relates to the technical field of waste lithium battery recovery, and more specifically, to a continuous leaching device and method for recovering lithium from waste lithium batteries. Background Art

[0002] With the development of automobile electrification, lithium batteries are widely used in the automotive industry as a power source for electric vehicles. However, with the use of electric vehicles, lithium batteries will undergo irreversible degradation. After the capacity of lithium batteries decays to a certain extent, the automotive lithium batteries need to be replaced, and the replaced waste lithium batteries need to be disposed of to prevent pollution to the environment.

[0003] Utility model patent CN222051865U discloses an impurity removal device for wet recycling of waste lithium batteries, which uses a leaching solution to dissolve lithium battery waste and then separates impurities in the solution, thereby reducing the impact of impurities on subsequent treatment of the solution;

[0004] However, the above patent document only has the function of isolating and cleaning the impurities in the solution. In actual application, it does not involve the aspect of continuous leaching treatment of lithium battery waste. That is, the lithium battery waste can only be leached once, and it is difficult to quickly and conveniently perform secondary treatment on the leached lithium battery waste, which greatly affects the leaching efficiency of the lithium battery waste.

[0005] In view of the above technical defects, a solution is now provided. Summary of the invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a continuous leaching device and method for recovering lithium from waste lithium batteries to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a continuous leaching device for recovering lithium from waste lithium batteries, comprising a base, a leaching barrel is fixedly installed on the top of the base, and a partition lifting mechanism and a bottom sealing mechanism are arranged inside the leaching barrel;

[0008] The partition lifting mechanism includes a plurality of partitions fixedly mounted on the inner wall of the leaching barrel, the plurality of partitions being arranged equidistantly in a ring shape on the inner circumferential surface of the leaching barrel, the plurality of partitions being in contact with the inner wall of the leaching barrel, the plurality of top heights of the plurality of partitions being different, a sealing cylinder being fixedly mounted on one side of the plurality of partitions, the sealing cylinder being arranged in a vertical state, and the sealing cylinder being fixedly mounted on the inner wall of the leaching barrel.

[0009] In a preferred embodiment, a reciprocating threaded rod is rotatably mounted inside the sealing cylinder, the reciprocating threaded rod is rotatably mounted on the bottom of the leaching barrel, a motor is provided at the bottom of the reciprocating threaded rod, and the motor is fixedly mounted on the bottom of the leaching barrel.

[0010] In a preferred embodiment, the outer wall of the reciprocating threaded rod is threadedly connected with a lifting ring, and the lifting ring is slidably installed on the inner wall of the leaching barrel. The lifting ring is arranged in a horizontal state, and a plurality of synchronization rods are fixedly installed on the top of the lifting ring. The plurality of synchronization rods are slidably installed on the top of the sealing tube, and the plurality of synchronization rods are arranged vertically upward.

[0011] In a preferred embodiment, the outer walls of the multiple synchronization rods are respectively fixedly installed with connecting frames, the multiple connecting frames are slidably installed on the outer wall of the partition, the multiple connecting frames are arranged in a vertical state, the bottoms of the multiple connecting frames are fixedly installed with sieve partitions, the multiple sieve partitions are slidably installed on the outer wall of the partition, the multiple sieve partitions are arranged in a slope shape, and the multiple sieve partitions and the partitions are arranged corresponding to each other.

[0012] In a preferred embodiment, the bottom sealing mechanism includes a top partition fixedly installed between multiple partitions, multiple top partitions are fixedly installed on the inner wall of the leaching barrel, the tops of the multiple top partitions are arranged to be inclined downward, and one side of the multiple top partitions is provided with a groove, and the position of the groove and the screen partition are arranged to correspond to each other.

[0013] In a preferred embodiment, a sealing plate is slidably mounted on the inner wall of the groove, the outer wall of the sealing plate is in contact with the inner wall of the groove, the top of the sealing plate is in contact with the bottom of the screen plate, and a plurality of supporting springs are fixedly mounted on the bottom of the sealing plate, and the plurality of supporting springs are fixedly mounted on the inner wall of the leaching barrel.

[0014] In a preferred embodiment, a stirring mechanism is provided inside the leaching barrel, and the stirring mechanism includes a plurality of connecting rods fixedly mounted on the outer wall at the bottom of the reciprocating threaded rod, the plurality of connecting rods are arranged in a horizontal state, and a gear ring is fixedly mounted on the outer walls of the plurality of connecting rods, the gear ring is rotatably mounted on the bottom of the leaching barrel, and the gear ring is arranged in a horizontal state.

[0015] In a preferred embodiment, the outer wall of the gear ring is meshed with multiple gears, the tops of the multiple gears are fixedly mounted with rotating rods, the multiple rotating rods are rotatably mounted on the bottom of the leaching barrel, the outer walls of the multiple rotating rods are fixedly mounted with stirring impellers, and the multiple stirring impellers are located between multiple partitions.

[0016] The present invention also provides a method for using a continuous leaching device for recovering lithium from waste lithium batteries, the specific steps of which include continuous conveying of waste lithium batteries and leaching and stirring of waste lithium batteries;

[0017] Step 1: First, put the lithium battery waste into the first compartment for leaching, and the motor drives the reciprocating threaded rod to rotate. The reciprocating threaded rod makes the lifting ring move up and drives multiple synchronous rods to move up synchronously;

[0018] Step 2: Multiple synchronous rods synchronously drive multiple joint frames to move multiple screen plates upward on the outer wall of the partition plate, and the multiple screen plates bring up the lithium battery waste leached in the previous compartment, and after passing over the multiple screen plates, the lithium battery waste is sent to the next compartment through the inclined surface thereof;

[0019] Step 3: The reciprocating threaded rod drives the multiple connecting rods to rotate synchronously, that is, the multiple connecting rods drive the gear ring to rotate synchronously, that is, the gear ring drives the multiple gears to rotate;

[0020] Step 4: The multiple gears drive the multiple rotating rods to make the multiple stirring impellers rotate and stir in the compartments formed by the multiple partitions;

[0021] Step 5: When the screen plate is sent down, the lithium battery waste at the bottom is pushed away by squeezing, and then it continues to move down and squeezes the sealing plate on the top of the slot. At this time, the screen plate can be located in the slot and correspond to the top of the top partition. The remaining lithium battery waste falls on the screen plate again.

[0022] Technical effects and advantages of the present invention:

[0023] The present invention arranges a plurality of partitions in a leaching barrel, and then arranges a lifting plate on one side of the partition to send the lithium battery waste leached on the previous side to the next partition area, that is, to perform continuous secondary leaching treatment, thereby avoiding the influence of traditional single leaching treatment on the leaching effect, and increasing the leaching rate of the lithium battery waste through a stirring mechanism, thereby improving the leaching efficiency of the lithium battery waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 It is a top view of the present invention.

[0026] Figure 3 It is a vertical cross-sectional view of the present invention.

[0027] Figure 4 It is a partial cross-sectional view of the separation and lifting mechanism in the present invention.

[0028] Figure 5 It is a partial cross-sectional view of the bottom sealing mechanism in the present invention.

[0029] Figure 6 It is a bottom view of the present invention.

[0030] Figure 7 It is a partial cross-sectional view of the stirring mechanism in the present invention.

[0031] The accompanying drawings are marked as follows: 1. base; 2. leaching barrel; 3. partition lifting mechanism; 31. partition; 32. sealing cylinder; 33. reciprocating threaded rod; 34. motor; 35. lifting ring; 36. synchronization rod; 37. connecting frame; 38. sieve partition; 4. bottom sealing mechanism; 41. top partition; 42. slot; 43. sealing support plate; 44. supporting spring; 5. stirring mechanism; 51. connecting rod; 52. gear ring; 53. gear; 54. rotating rod; 55. stirring impeller. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0033] The leaching method only has the function of isolating and cleaning impurities in the solution. In actual application, it does not involve the continuous leaching treatment of lithium battery waste, that is, the lithium battery waste can only be leached once, and it is difficult to quickly and conveniently perform secondary treatment on the leached lithium battery waste, which greatly affects the leaching efficiency of lithium battery waste. In order to solve this problem, the following technical solution is proposed:

[0034] Refer to the instruction manual Figure 1-Figure 7 , a continuous leaching device for recovering lithium from waste lithium batteries, such as Figure 1 and Figure 2 As shown, it comprises a base 1, a leaching barrel 2 is fixedly mounted on the top of the base 1, and a partition lifting mechanism 3 and a bottom sealing mechanism 4 are arranged inside the leaching barrel 2;

[0035] like Figure 3 and Figure 4 As shown, the partition lifting mechanism 3 includes a plurality of partitions 31 fixedly mounted on the inner wall of the leaching barrel 2. The plurality of partitions 31 are arranged equidistantly in a ring shape on the inner circumferential surface of the leaching barrel 2. The plurality of partitions 31 fit the inner wall of the leaching barrel 2. The top heights of the plurality of partitions 31 are different. A sealing cylinder 32 is fixedly mounted on one side of the plurality of partitions 31. The sealing cylinder 32 is arranged in a vertical state and fixedly mounted on the inner wall of the leaching barrel 2. The plurality of partitions 31 and the sealing cylinder 32 are combined together in the leaching barrel 2 to divide the interior of the leaching barrel 2 into a plurality of compartments with different heights.

[0036] like Figure 3 and Figure 4 As shown, a reciprocating threaded rod 33 is rotatably installed inside the sealing cylinder 32, and the reciprocating threaded rod 33 is rotatably installed at the bottom of the leaching barrel 2. A motor 34 is provided at the bottom of the reciprocating threaded rod 33, and the motor 34 is fixedly installed at the bottom of the leaching barrel 2. The motor 34 drives the reciprocating threaded rod 33 to rotate.

[0037] like Figure 3 and Figure 4 As shown, the outer wall of the reciprocating threaded rod 33 is threadedly connected with a lifting ring 35, and the lifting ring 35 is slidably installed on the inner wall of the leaching barrel 2. The lifting ring 35 is arranged in a horizontal state, and a plurality of synchronization rods 36 are fixedly installed on the top of the lifting ring 35. The plurality of synchronization rods 36 are slidably installed on the top of the sealing tube 32, and the plurality of synchronization rods 36 are arranged vertically upward. The reciprocating threaded rod 33 makes the lifting ring 35 move reciprocatingly up and down, that is, the lifting ring 35 drives the plurality of synchronization rods 36 to move synchronously.

[0038] like Figure 3 and Figure 4 As shown, the outer walls of the multiple synchronization rods 36 are respectively fixedly installed with connecting frames 37, and the multiple connecting frames 37 are slidably installed on the outer wall of the partition 31. The multiple connecting frames 37 are arranged in a vertical state, and the bottoms of the multiple connecting frames 37 are fixedly installed with sieve partitions 38, and the multiple sieve partitions 38 are slidably installed on the outer wall of the partition 31. The multiple sieve partitions 38 are arranged in a slope shape, and the multiple sieve partitions 38 and the partition 31 are arranged corresponding to each other. The multiple synchronization rods 36 synchronously drive the multiple connecting frames 37 to make the multiple sieve partitions 38 move back and forth up and down on the outer wall of the partition 31, and the lithium battery waste separated and leached by the multiple partitions 31 is picked up by the multiple sieve partitions 38, and after crossing the multiple sieve partitions 38, the lithium battery waste is sent to the next compartment through its inclined surface.

[0039] like Figure 4 and Figure 5 As shown, the bottom sealing mechanism 4 includes a top partition 41 fixedly installed between multiple partitions 31, and the multiple top partitions 41 are fixedly installed on the inner wall of the leaching barrel 2. The tops of the multiple top partitions 41 are arranged to be inclined downward, and one side of the multiple top partitions 41 is provided with a slot 42. The position of the slot 42 and the sieve partition 38 are arranged to correspond to each other, and the lithium battery waste is guided to the position of the slot 42, that is, to the position of the sieve partition 38 through the top partition 41.

[0040] like Figure 4 and Figure 5As shown, a sealing plate 43 is slidably installed on the inner wall of the slot 42, the outer wall of the sealing plate 43 fits with the inner wall of the slot 42, the top of the sealing plate 43 fits with the bottom of the sieve plate 38, and a plurality of supporting springs 44 are fixedly installed on the bottom of the sealing plate 43. The plurality of supporting springs 44 are fixedly installed on the inner wall of the leaching barrel 2, and the sealing plate 43 is driven by the plurality of supporting springs 44 to move up synchronously after the sieve plate 38 moves up to block the top of the slot 42, so as to prevent lithium battery waste from falling into the slot 42 and being unable to be lifted by the sieve plate 38.

[0041] like Figure 5 and Figure 6 As shown, a stirring mechanism 5 is arranged inside the leaching barrel 2, and the stirring mechanism 5 includes a plurality of connecting rods 51 fixedly mounted on the outer wall at the bottom of the reciprocating threaded rod 33, and the plurality of connecting rods 51 are arranged in a horizontal state, and a gear ring 52 is fixedly mounted on the outer walls of the plurality of connecting rods 51, and the gear ring 52 is rotatably mounted on the bottom of the leaching barrel 2, and the gear ring 52 is arranged in a horizontal state, and the plurality of connecting rods 51 are driven to rotate synchronously by the reciprocating threaded rod 33, that is, the plurality of connecting rods 51 drive the gear ring 52 to rotate synchronously.

[0042] like Figure 5 and Figure 6 As shown, the outer wall of the gear ring 52 is meshed with multiple gears 53, and a rotating rod 54 is fixedly installed on the top of the multiple gears 53. The multiple rotating rods 54 are rotatably installed on the bottom of the leaching barrel 2, and the outer walls of the multiple rotating rods 54 are fixedly installed with stirring impellers 55. The multiple stirring impellers 55 are located between the multiple partitions 31, that is, the gear ring 52 drives the multiple gears 53 to rotate, so that the multiple gears 53 drive the multiple rotating rods 54 to make the multiple stirring impellers 55 rotate and stir in the compartment formed by the multiple partitions 31, that is, the lithium battery waste in the auxiliary compartment is leached.

[0043] The present invention also provides a method for using a continuous leaching device for recovering lithium from waste lithium batteries, the specific steps of which include continuous conveying of waste lithium batteries and leaching and stirring of waste lithium batteries;

[0044] Step 1: First, put the lithium battery waste into the first compartment for leaching, and the motor drives the reciprocating threaded rod to rotate. The reciprocating threaded rod makes the lifting ring move up and drives multiple synchronous rods to move up synchronously;

[0045] Step 2: Multiple synchronous rods synchronously drive multiple joint frames to move multiple screen plates upward on the outer wall of the partition plate, and the multiple screen plates bring up the lithium battery waste leached in the previous compartment, and after passing over the multiple screen plates, the lithium battery waste is sent to the next compartment through the inclined surface thereof;

[0046] Step 3: The reciprocating threaded rod drives the multiple connecting rods to rotate synchronously, that is, the multiple connecting rods drive the gear ring to rotate synchronously, that is, the gear ring drives the multiple gears to rotate;

[0047] Step 4: The multiple gears drive the multiple rotating rods to make the multiple stirring impellers rotate and stir in the compartments formed by the multiple partitions;

[0048] Step 5: When the screen plate is sent down, the lithium battery waste at the bottom is pushed away by squeezing, and then it continues to move down and squeezes the sealing plate on the top of the slot. At this time, the screen plate can be located in the slot and correspond to the top of the top partition. The remaining lithium battery waste falls on the screen plate again.

[0049] In the specific implementation, multiple partitions 31 and sealing cylinders 32 are combined together in the leaching barrel 2, so as to divide the interior of the leaching barrel 2 into multiple compartments. Lithium battery waste is first placed in the first compartment for leaching. The motor 34 drives the reciprocating threaded rod 33 to rotate. The reciprocating threaded rod 33 drives the lifting ring 35 to move upward and drives multiple synchronous rods 36 to move upward synchronously. The multiple synchronous rods 36 synchronously drive multiple joint frames 37 to move multiple sieve partitions 38 on the outer wall of the partition 31.

[0050] At this time, since the lithium battery waste guided by the top partition 41 is located on the sieve partition 38, the lithium battery waste leached in the previous compartment is brought up by the multiple sieve partitions 38, and after passing over the multiple sieve partitions 38, the lithium battery waste is sent to the next compartment through the inclined surface thereof, thereby achieving a continuous leaching effect;

[0051] When the sieve plate 38 moves upward, the sealing support plate 43 is driven by a plurality of supporting springs 44 to move upward synchronously after the sieve plate 38 moves upward to block the top of the slot 42. When the sieve plate 38 is sent downward, the lithium battery waste at the bottom is pushed away by squeezing, and then the sealing support plate 43 that pushes the top of the slot 42 is pushed downward continuously, so that the sieve plate 38 can be located in the slot 42 and correspond to the top of the top plate 41, so that the remaining lithium battery waste falls on the sieve plate 38 again.

[0052] At the same time, the reciprocating threaded rod 33 drives the multiple connecting rods 51 to rotate synchronously, that is, the multiple connecting rods 51 drive the gear ring 52 to rotate synchronously, that is, the gear ring 52 drives the multiple gears 53 to rotate, so that the multiple gears 53 drive the multiple rotating rods 54 to make the multiple stirring impellers 55 rotate and stir in the compartments formed by the multiple partitions 31, that is, to assist the leaching of lithium battery waste in each compartment.

[0053] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0054] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0055] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A continuous leaching device for recovering lithium from waste lithium batteries, comprising a base (1), characterized in that: A leaching barrel (2) is fixedly mounted on the top of the base (1), and a partition lifting mechanism (3) and a bottom sealing mechanism (4) are arranged inside the leaching barrel (2); The partition lifting mechanism (3) comprises a plurality of partitions (31) fixedly mounted on the inner wall of the leaching barrel (2); the plurality of partitions (31) are arranged equidistantly in a ring shape on the inner circumferential surface of the leaching barrel (2); the plurality of partitions (31) are in contact with the inner wall of the leaching barrel (2); the tops of the plurality of partitions (31) are at different heights; a sealing cylinder (32) is fixedly mounted on one side of the plurality of partitions (31); the sealing cylinder (32) is arranged in a vertical state and is fixedly mounted on the inner wall of the leaching barrel (2); The bottom sealing mechanism (4) comprises a top baffle (41) fixedly mounted between a plurality of baffles (31), the plurality of top baffles (41) being fixedly mounted on the inner wall of the leaching barrel (2), the tops of the plurality of top baffles (41) being arranged tilted downward, a groove (42) being provided on one side of the plurality of top baffles (41), the positions of the groove (42) and the sieve baffle (38) being arranged corresponding to each other; A sealing support plate (43) is slidably mounted on the inner wall of the slot (42), the outer wall of the sealing support plate (43) is in contact with the inner wall of the slot (42), the top of the sealing support plate (43) is in contact with the bottom of the sieve plate (38), and a plurality of supporting springs (44) are fixedly mounted on the bottom of the sealing support plate (43), and the plurality of supporting springs (44) are fixedly mounted on the inner wall of the leaching barrel (2); A reciprocating threaded rod (33) is rotatably mounted inside the sealing cylinder (32), and the reciprocating threaded rod (33) is rotatably mounted on the bottom of the leaching barrel (2). A motor (34) is provided at the bottom of the reciprocating threaded rod (33), and the motor (34) is fixedly mounted on the bottom of the leaching barrel (2); The outer wall of the reciprocating threaded rod (33) is threadedly connected with a lifting ring (35), the lifting ring (35) is slidably mounted on the inner wall of the leaching barrel (2), the lifting ring (35) is arranged in a horizontal state, a plurality of synchronization rods (36) are fixedly mounted on the top of the lifting ring (35), the plurality of synchronization rods (36) are slidably mounted on the top of the sealing tube (32), and the plurality of synchronization rods (36) are arranged vertically upward; The outer walls of the plurality of synchronization rods (36) are respectively fixedly mounted with connecting frames (37), the plurality of connecting frames (37) are slidably mounted on the outer wall of the partition (31), the plurality of connecting frames (37) are arranged in a vertical state, the bottoms of the plurality of connecting frames (37) are fixedly mounted with sieve partitions (38), the plurality of sieve partitions (38) are slidably mounted on the outer wall of the partition (31), the plurality of sieve partitions (38) are arranged in a sloped shape, and the plurality of sieve partitions (38) and the partition (31) are arranged corresponding to each other.

2. A continuous leaching device for recovering lithium from waste lithium batteries according to claim 1, characterized in that: The leaching barrel (2) is provided with a stirring mechanism (5) inside, the stirring mechanism (5) comprising a plurality of connecting rods (51) fixedly mounted on the outer wall of the bottom of the reciprocating threaded rod (33), the plurality of connecting rods (51) being arranged in a horizontal state, a gear ring (52) being fixedly mounted on the outer walls of the plurality of connecting rods (51), the gear ring (52) being rotatably mounted on the bottom of the leaching barrel (2), the gear ring (52) being arranged in a horizontal state.

3. A continuous leaching device for recovering lithium from waste lithium batteries according to claim 2, characterized in that: The outer wall of the gear ring (52) is meshed with a plurality of gears (53), the tops of the plurality of gears (53) are fixedly mounted with rotating rods (54), the plurality of rotating rods (54) are rotatably mounted on the bottom of the leaching barrel (2), the outer walls of the plurality of rotating rods (54) are fixedly mounted with stirring impellers (55), and the plurality of stirring impellers (55) are located between the plurality of partitions (31).

4. A method for using a continuous leaching device for recovering lithium from waste lithium batteries, using the continuous leaching device for recovering lithium from waste lithium batteries as described in any one of claims 1 to 3, characterized in that: The specific steps include continuous conveying treatment of waste lithium batteries and leaching and stirring treatment of waste lithium batteries.

Images