Lithium ion battery negative electrode material recovery device

Abstract

The utility model relates to a lithium ion battery cathode material recovery device which comprises a calcining furnace, a copper liquid recovery box, a graphite slag transfer channel, a reaction kettle and a solid-liquid separation assembly, the calcining furnace comprises a furnace body, a copper liquid leakage net and a propelling assembly, the upper end face of the furnace body is provided with a waste lithium battery feeding port, and the bottom opening of the furnace body is provided with the copper liquid leakage net; a graphite slag outlet is formed in one side wall, the propelling assembly is mounted in the furnace, and the working end of the propelling assembly is aligned with the graphite slag outlet; an upper opening of the copper liquid recycling box is detachably connected with the furnace bottom; one end of the graphite slag transfer channel is communicated with the graphite slag outlet; the reaction kettle comprises a kettle body and a stirrer, a graphite slag inlet is formed in one side of the kettle body and communicated with the other end of the graphite slag transfer channel, an organic alcohol solvent inlet is formed in the other side of the kettle body, a discharge port is formed in the bottom of the kettle body, the mounting end of the stirrer is fixedly connected with the top of the kettle body, and the working end of the stirrer extends into the kettle body; and the feeding end of the solid-liquid separation assembly is communicated with the discharging hole of the reaction kettle.

Description

Technical Field

[0001] The invention belongs to the technical field of waste lithium battery recycling, and specifically relates to a lithium ion battery negative electrode material recycling device. Background Art

[0002] Lithium-ion batteries are the main energy storage devices in the current market, playing an important role in the fields of new energy vehicles and stationary energy storage. Since the service life of lithium-ion batteries is only 5 to 10 years, the recycling and reuse of millions of tons of waste lithium-ion batteries each year in the future has become a top priority. The common structure of waste batteries mainly includes the shell, positive electrode sheet (active material / binder / conductive carbon / aluminum foil), diaphragm, negative electrode sheet (active material / binder / conductive carbon / copper foil) and electrolyte.

[0003] Since the positive electrode active materials contain a large amount of rare and precious heavy metals such as cobalt, nickel, manganese, and lithium, they have become the main research object for recycling and treatment, while there are fewer studies on the recycling of negative electrode materials. The common active material of the negative electrode is graphite, which is also the main component of the negative electrode. Graphite has the characteristics of good conductivity, high degree of crystallization, and good layered structure, which is very suitable for the embedding and extraction of lithium ions during the charging and discharging process. Therefore, graphite also has a very high recycling value. Therefore, the recyclable substances of the negative electrode materials of lithium-ion batteries include copper, graphite, lithium remaining in the gaps of the graphite lattice, and lithium compounds attached to the SEI film.

[0004] In the prior art, mechanical separation methods are commonly used to separate copper. For example, CN202211690537.6 provides a mechanical crushing and kneading method to separate copper foil and graphite. However, this method is usually difficult to obtain relatively pure copper and will also cause the scraped copper powder to be mixed into the scraped powder. Since lithium ions are embedded in the pores of graphite, simple calcination cannot separate the graphite and these lithium ions. Therefore, acid leaching is generally used to separate lithium compounds. The acid leaching method requires a large amount of strong acid to extract the lithium compounds therein. The operation process is dangerous, and the subsequent treatment of the acid solution also has environmental issues. Acid pickling is highly corrosive to equipment and highly polluting.

[0005] Therefore, it is necessary to propose a new device that can be safer, less polluting and at the same time recover copper, graphite and lithium in the negative electrode. Utility Model Content

[0006] The purpose of the utility model is to provide a lithium-ion battery negative electrode material recovery device, aiming to solve the problem of the lack of corresponding devices in the prior art to ensure greater safety, reduce pollution and recover copper, graphite and lithium in the negative electrode.

[0007] In order to solve the above problems, the utility model adopts the following technical solutions:

[0008] A lithium-ion battery negative electrode material recovery device, comprising a calcining furnace, a copper liquid recovery box, a graphite slag transfer channel, a reaction kettle, and a solid-liquid separation component.

[0009] The calcining furnace comprises a furnace body, a copper liquid leakage screen and a propulsion assembly, wherein the upper end surface of the furnace body is provided with a battery negative electrode inlet, the bottom is open, and one side wall is provided with a graphite slag outlet, the copper liquid leakage screen is horizontally arranged and detachably connected to the inner wall of the bottom of the furnace body, the installation end of the propulsion assembly is fixedly connected to the inner wall of the furnace body opposite to the graphite slag outlet, and its working end is aligned with the graphite slag outlet;

[0010] The upper opening of the copper liquid recovery box is detachably connected to the bottom of the furnace body;

[0011] One end of the graphite slag transfer channel is connected to the graphite slag outlet;

[0012] The reactor comprises a reactor body and an agitator. A graphite slag inlet is provided on one side of the reactor body, connected to the other end of the graphite slag transfer channel, an organic alcohol solvent inlet is provided on the other side, and a discharge port is provided at the bottom. The mounting end of the agitator is fixedly connected to the top of the reactor body, and the working end extends into the interior of the reactor body.

[0013] The feed end of the solid-liquid separation component is connected to the discharge port of the reactor.

[0014] The utility model has the beneficial effect that, by treating the negative electrode material of the lithium-ion battery in stages, copper, lithium and graphite in the negative electrode material of the lithium-ion battery are recovered in sequence. First, the negative electrode material is calcined at high temperature in a calcining furnace to melt the copper foil and leak it into the copper liquid collection box below through a copper liquid leakage net, and the copper element is separated in the form of copper element. Subsequently, the calcined graphite residue is transported to a reactor, and an organic alcohol solvent is added to the reactor. The principle is that during the use of the lithium-ion battery, lithium ions will be embedded in the negative electrode active material of the negative electrode sheet, that is, in the lattice of graphite, so that the graphite has active lithium, and the active lithium has high reactivity. After the organic alcohol solvent is added, the active lithium reacts with the organic alcohol to obtain an organic lithium compound, which is then separated from the graphite lattice. Then, solid-liquid separation is performed through a solid-liquid separation component to completely separate the organic lithium compound from the graphite, and the lithium element and graphite are recovered respectively.

[0015] Compared with the prior art, the device provided by the utility model can effectively obtain copper, lithium and graphite at the same time, the separation result is thorough and free of impurities, and the entire process does not use acidic substances, has no corrosive effect on the device, has lower pollution, and is a significant improvement.

[0016] Furthermore, the solid-liquid separation assembly includes a graphite recovery barrel, a connecting rod, an organic lithium recovery barrel, a driving motor, and a transmission assembly.

[0017] The graphite recovery barrel is open at the top, and is coaxially arranged below the kettle body and aligned with the discharge port of the kettle body. The bottom and the lower end of the side wall of the graphite recovery barrel are both filter screens;

[0018] One end of the connecting rod is fixedly connected to the upper end of the outer wall of the graphite recovery barrel, and the reactor further comprises a slide rail, which surrounds the reactor body along the circumference of the reactor body and is fixedly connected to its outer wall, and the other end of the connecting rod is slidably connected to the slide rail;

[0019] The upper end of the organic lithium recovery barrel is open, and its inner diameter is larger than the outer diameter of the graphite recovery barrel, and is sleeved on the outer side of the graphite recovery barrel;

[0020] The mounting end of the driving motor is fixedly connected to the upper edge of the organic lithium recovery barrel;

[0021] The transmission assembly includes an active member and a driven member, wherein the active member is fixedly connected to the output end of the driving motor, and the driven member is fixedly connected to the outer wall of the graphite recovery barrel, and the active member and the driven member are in transmission connection.

[0022] A further beneficial effect of the utility model is that graphite and organic lithium are respectively recovered by a graphite recovery barrel and an organic lithium recovery barrel, the graphite recovery barrel is aligned with the discharge port of the kettle body, receives a mixture of an organic alcohol solvent containing organic lithium and graphite, and relies on the filter screen at the bottom for primary filtration, and then drives the graphite recovery barrel to rotate by a driving motor, and utilizes centrifugal force to throw out the residual organic alcohol solvent. In this process, the graphite recovery barrel is suspended under the kettle body by a connecting rod, and when the motor is started, the graphite recovery barrel is rotated on its own axis by a transmission member, and one end of the connecting rod is fixed to the outer wall of the graphite recovery barrel and the other end can move along the slide rail, and the graphite recovery barrel is coaxially arranged with the reactor above, and when the graphite recovery barrel receives the power brought by the transmission component, it will rotate on its own axis to throw out the residual solvent.

[0023] Further, the slide rail is a grooved slide rail, the groove of which is arranged horizontally, the bottom of which is fixedly connected to the outer wall of the kettle body, and the groove of which is contracted inwardly;

[0024] A universal ball is detachably connected to the side surface of the movable end of the connecting rod, and the ball body of the universal ball is clamped in the slide rail.

[0025] A further beneficial effect of the utility model is that, through the cooperation of the U-shaped slide rail and the universal ball, the other end of the connecting rod is clamped on the kettle body and can rotate around the kettle body along the slide rail. When the graphite recovery barrel is coaxial with the kettle body, the graphite recovery barrel can be rotated after the motor is started.

[0026] Furthermore, the active component is a gear, the output end of the drive motor is vertically upward, the axle of the gear is fixedly connected to the output end of the drive motor, the driven component is a gear ring, the gear ring is horizontally sleeved on the middle of the outer wall of the graphite recovery barrel and fixedly connected thereto, and the gear meshes with the gear ring.

[0027] A further beneficial effect of the utility model is that it provides a combination of a gear and a gear ring, which rotates by utilizing the cooperation of the gear and the gear ring. When the drive motor is started, the output shaft drives the gear to rotate, and the gear meshes with the gear ring, driving the gear to rotate, thereby driving the graphite recovery barrel to rotate.

[0028] Furthermore, a liquid outlet is provided at the lower end of the side wall of the organic lithium recovery barrel, the bottom of the organic lithium recovery barrel is detachably connected to its side wall, and the bottom of the graphite recovery barrel is detachably connected to its side wall.

[0029] A further beneficial effect of the utility model is that the separated graphite material can be easily taken out by disassembling the bottom.

[0030] Furthermore, the solid-liquid separation component also includes an electric heating network, and the electric heating network is fixedly connected to the bottom of the graphite recovery barrel.

[0031] A further beneficial effect of the utility model is that it additionally provides a drying function for the separation mechanism, and the separated graphite can be dried at the bottom of the graphite recovery barrel, so that the final product is dry graphite powder, which is convenient for subsequent processing.

[0032] Furthermore, the propulsion assembly includes a telescopic cylinder and a slag pusher plate, the mounting end of the telescopic cylinder is fixedly connected to the inner wall of the furnace body, the output end is aligned with the graphite slag outlet, one side of the slag pusher plate is fixedly connected to the output end of the telescopic cylinder, and the lower side of the slag pusher plate abuts against the upper surface of the copper liquid leakage net.

[0033] The utility model has a further beneficial effect that, through the cooperation of the cylinder and the slag pushing plate, the graphite slag separated from the copper foil in the calcining furnace is pushed to the outlet for transportation to the next link.

[0034] Furthermore, a transfer belt is provided at the bottom of the graphite slag transfer channel, and two ends of the upper end surface of the transfer belt are respectively aligned with the graphite slag outlet and the graphite slag inlet.

[0035] A further beneficial effect of the utility model is that the graphite slag can be easily transported by providing a transfer belt.

[0036] Furthermore, it also includes a waste gas purification device, and the side wall of the calcining furnace is provided with an exhaust port, and the exhaust port is connected to the waste gas purification device.

[0037] A further beneficial effect of the utility model is that the waste gas purification device is used to purify the high-temperature gas generated by calcining waste lithium-ion battery plastic shells and membranes and other materials in the electric calcining furnace, further removing the pollution that may be generated by the utility model.

[0038] Furthermore, it also includes a lithium-ion battery negative electrode crushing device, which is located above the calcining furnace, and its discharge end is connected to the feed inlet of the calcining furnace.

[0039] A further beneficial effect of the utility model is that the crushed negative electrode material of the lithium-ion battery is easier to carry out subsequent processing, and the separation of the copper liquid is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A stereogram provided for the utility model;

[0041] Figure 2 The main cross-sectional view provided by the utility model; the reference numerals

[0042] 1. Calcination furnace; 110. Furnace body; 111. Feeding port; 112. Graphite slag outlet; 120. Copper liquid leakage screen; 130. Propelling assembly; 131. Telescopic cylinder; 132. Slag pushing plate;

[0043] 2. Copper liquid recovery box;

[0044] 3. Graphite slag transfer channel; 310. Conveyor belt;

[0045] 4. Reactor; 410. Reactor body; 411. Graphite slag inlet; 412. Organic alcohol solvent inlet; 413. Discharge port; 420. Agitator; 430. Slide rail:

[0046] 5. Solid-liquid separation component; 510. Graphite recovery barrel; 520. Connecting rod; 521. Universal ball; 530. Organic lithium recovery barrel; 540. Driving motor; 550. Transmission component; 551. Active part; 552. Driven part; 560. Electric heating network. DETAILED DESCRIPTION

[0047] 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 in 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.

[0048] See also Figure 1The utility model provides a new recovery device for negative electrode materials of lithium-ion batteries, which is mainly composed of the following parts: a calcining furnace 1, a copper liquid recovery box 2, a graphite slag transfer channel 3, a reactor 4 and a solid-liquid separation component 5, which are used to recover copper, lithium and graphite in graphite negative electrode materials respectively. The specific structure is as follows.

[0049] The furnace body 110 can be improved by using a conventional electric calcining furnace. The main body is the furnace body 110, and its inner wall is provided with an electric heating plate, which can perform high-temperature calcination on the negative electrode of the lithium-ion battery. A feeding port 111 for putting in the negative electrode of the waste lithium-ion battery is opened above the furnace body 110, and a graphite slag outlet 112 is opened on the side wall, and two switch doors are used to open and close the two ports respectively to ensure the sealing during the calcination process. The bottom wall is removed and replaced with a copper liquid leakage net 120. Specifically, the copper liquid leakage net 120 is made of alloy, is resistant to high temperature, is placed horizontally, and its edge is fixed to the bottom of the furnace body 110 by welding. The top of the copper liquid recovery box 2 is open, and its shape and size are adapted to the furnace body 110, aligned with the bottom of the furnace body 110, and welded as a whole. The copper liquid recovery box 2 can be opened from the side and has a crucible inside. In this process, the temperature in the furnace body 110 is gradually increased until it reaches the melting point of copper. Since the melting points of graphite and alloys are much higher than that of copper, the copper foil in the negative electrode material is melted first and flows through the copper liquid leakage net 120 to the crucible of the copper liquid recovery box 2 below. The substances after calcination are graphite slag and lithium ions in the graphite lattice, which are pushed to the graphite slag outlet 112 by the propulsion assembly 130 and enter the graphite slag transfer channel 3. The mounting end of the propulsion assembly 130 is bolted to the inner wall of the furnace body 110, and the end used for propulsion is aligned with the graphite slag outlet 112.

[0050] The reactor 4 includes a reactor body 410 and an agitator 420. A graphite slag inlet 411 is provided on one side wall of the reactor body 410, which is connected to the graphite slag transfer channel 3 and receives the graphite slag calcined in the furnace body 110. An organic alcohol solvent inlet 412 is provided on the other side, and a discharge port 413 is provided at the center of the bottom. The mounting end of the agitator 420 is welded to the top of the reactor body 410, and the working end extends downward into the reactor body 410. The reactor body 410 is mainly used to fully mix the graphite slag and the organic alcohol solvent. The organic alcohol will combine with the lithium ions in the graphite lattice to generate organic lithium. Through this reaction, the graphite and lithium ions are separated, and the lithium element is extracted from the graphite slag. The organic alcohol can be an organic substance containing hydroxyl groups, such as alkyl alcohol. This part is existing knowledge and will not be repeated here.

[0051] After the graphite slag fully reacts with the organic alcohol solvent, it enters the solid-liquid separation component 5 through the discharge port 413 of the kettle body 410 for solid-liquid separation, so as to separate the solution containing organic lithium from the solid graphite, and recover the lithium element and graphite respectively.

[0052] Compared with the prior art, the device provided by the utility model can effectively obtain copper, lithium and graphite at the same time, the separation result is thorough and free of impurities, and the whole process does not use acidic substances, has no corrosive effect on the device, and has low pollution.

[0053] To further improve the technical solution, please refer to the attached Figure 2 The solid-liquid separation component 5 includes a graphite recovery barrel 510, a connecting rod 520, an organic lithium recovery barrel 530, a driving motor 540 and a transmission component 550. The graphite recovery barrel 510 is open at the top and is coaxially arranged with the kettle body 410 below the kettle body 410, aligned with the discharge port 413 of the kettle body 410. The bottom and the lower end of the side wall of the graphite recovery barrel 510 are both filter screens; a circle of slide rails 430 are fixedly installed on the outer wall of the kettle body 410 in the horizontal direction, one end of the connecting rod 520 is fixedly connected to the graphite recovery barrel 510, and the other end can rotate around the outer wall of the kettle body 410 along the slide rail 430. The upper end of the organic lithium recovery barrel 530 is open, and its inner diameter is larger than the outer diameter of the graphite recovery barrel 510, and is coaxially sleeved on the outside of the graphite recovery barrel 510; the mounting end shell of the driving motor 540 is bolted to the upper edge of the organic lithium recovery barrel 530; the transmission assembly 550 includes an active part 551 and a driven part 552, and the active part 551 and the driven part 552 are respectively installed on the output end of the driving motor 540 and the graphite recovery barrel 510, and the graphite recovery barrel 510 can be driven to rotate through the transmission assembly 550 in conjunction with the connecting rod 520 and the slide rail 430.

[0054] Specifically, the slide rail 430 is a grooved slide rail, the bottom of which is welded to the outer wall of the kettle body 410 , and the edge of the groove shrinks inward to form a snap-in. One end of the connecting rod 520 is rotatably connected to a universal ball 521 through a pin shaft, and the ball body of the universal ball 521 is snap-fitted into the slide rail 430 .

[0055] Specifically, the active component 551 is a gear, the output shaft of the driving motor 540 is vertically upward, the axle of the gear is welded to the output shaft of the driving motor 540, and the driven component 552 is a gear ring, which is sleeved and welded on the outer wall of the graphite recovery barrel 510, and the gear and the gear ring are in a meshing state.

[0056] Specifically, a liquid outlet is provided at the lower end of the side wall of the organic lithium recovery barrel 530 for recovering a solution containing organic lithium, and the bottom and side wall of the graphite recovery barrel 510 can be opened and closed by a lock or other structure for recovering graphite in the barrel.

[0057] To further improve the technical solution, the solid-liquid separation component 5 also includes an electric heating net 560, which is attached to the bottom of the graphite recovery barrel 510 and provides an additional drying function. The separated graphite can be dried at the bottom of the graphite recovery barrel 510, so that the final product is dry graphite powder, which is convenient for subsequent processing.

[0058] Specifically, the propulsion assembly 130 includes a telescopic cylinder 131 and a slag pushing plate 132. The mounting end shell of the telescopic cylinder 131 is bolted to the inner wall of the furnace body, the telescopic end is aligned with the graphite slag outlet 112, one side of the slag pushing plate 132 is bolted to the telescopic end, and the lower side abuts against the upper end surface of the copper liquid leakage net 120. Through the cooperation of the telescopic cylinder 131 and the slag pushing plate 132, the graphite slag separated from the copper foil in the furnace body 110 is pushed to the outlet for transportation to the next link.

[0059] Specifically, a transfer belt 310 is installed at the bottom of the graphite slag transfer channel 3, and the two ends of the upper end surface of the transfer belt 310 are respectively aligned with the graphite slag outlet 112 and the graphite slag inlet 411, so as to facilitate the transfer of the graphite slag.

[0060] In order to further improve the technical solution, an exhaust gas purification device (not shown in the figure) may also be included. An exhaust port is provided on the side wall of the furnace body 110 and connected to the exhaust gas purification device. The exhaust gas purification device is used to purify the high-temperature gas generated by calcining the plastic shell and membrane of waste lithium-ion batteries in the electric furnace body 110, thereby further removing the pollution that may be generated by the utility model. The exhaust gas purification device may be a common exhaust gas treatment device such as a spray absorption tower, which will not be described in detail here.

[0061] In order to further improve the technical solution, a lithium-ion battery negative electrode crushing device (not shown in the figure) is also included, which is located above the furnace body 110, and its discharge end is connected to the feed port of the furnace body 110. The lithium-ion battery negative electrode crushing device can use a common crusher. This is the existing technology and will not be repeated here.

[0062] The use process of the utility model is as follows:

[0063] First, the crushed lithium-ion battery negative electrode is put into the calcining furnace, and the high-temperature calcination is turned on. The temperature gradually rises until the copper melting point is reached. The copper foil in the negative electrode material melts and flows through the copper liquid leakage net into the crucible in the copper liquid collection box below for recovery.

[0064] After the graphite is cooled, the graphite slag on the copper liquid leakage net is pushed to the graphite slag outlet by the propulsion component, and then transported to the reactor via the conveyor belt in the graphite slag transfer channel, and an organic alcohol solvent is introduced. In the reactor, the organic alcohol solvent reacts with the lithium ions embedded in the graphite lattice to form an organic lithium compound, thus completing the separation of graphite and lithium ions.

[0065] The discharge port of the kettle body is opened, and the graphite and organic lithium solution in the kettle body are put into the graphite recovery box. The filter screen of the graphite recovery box completes the primary filtration, and then the drive motor is started to drive the graphite recovery barrel to rotate, and the residual organic lithium solution is separated by centrifugal force. Finally, the electric heating network is started to dry the graphite to obtain graphite powder, and the organic lithium and graphite are recovered separately, so that one device can simultaneously recover copper, lithium and graphite in the negative electrode material of lithium-ion batteries. In addition, no acidic substances are used in the recovery process, and the entire recovery process is environmentally friendly and low-pollution.

[0066] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A lithium-ion battery negative electrode material recovery device, characterized in that: It comprises a calcining furnace (1), a copper liquid recovery box (2), a graphite slag transfer channel (3), a reaction kettle (4) and a solid-liquid separation component (5). The calcining furnace (1) comprises a furnace body (110), a copper liquid leakage net (120) and a propulsion assembly (130); the upper end surface of the furnace body (110) is provided with a battery negative electrode inlet (111), the bottom is open, and a side wall is provided with a graphite slag outlet (112); the copper liquid leakage net (120) is horizontally arranged and detachably connected to the bottom inner wall of the furnace body (110); the installation end of the propulsion assembly (130) is fixed to the inner wall of the furnace body (110) and is arranged opposite to the graphite slag outlet (112), and the working end thereof corresponds to the graphite slag outlet (112); The copper liquid recovery box (2) is open at the top and is detachably connected to the bottom of the furnace body (110); One end of the graphite slag transfer channel (3) is connected to the graphite slag outlet (112); The reaction kettle (4) comprises a kettle body (410) and an agitator (420); a graphite slag inlet (411) is provided on one side of the kettle body (410); the graphite slag inlet (411) is connected to the other end of the graphite slag transfer channel (3); an organic alcohol solvent inlet (412) is provided on the other side; a discharge port (413) is provided at the center of the bottom; the mounting end of the agitator (420) is fixedly connected to the top of the kettle body (410), and the working end extends into the interior of the kettle body (410); The feed end of the solid-liquid separation component (5) is connected to the discharge port (413) of the kettle body (410).

2. A lithium-ion battery negative electrode material recovery device according to claim 1, characterized in that: The solid-liquid separation component (5) comprises a graphite recovery barrel (510), a connecting rod (520), an organic lithium recovery barrel (530), a driving motor (540) and a transmission component (550). The graphite recovery barrel (510) is open at the top and is coaxially arranged directly below the kettle body (410); the bottom and the lower end of the side wall of the graphite recovery barrel (510) are both filter screens; One end of the connecting rod (520) is fixedly connected to the upper end of the outer wall of the graphite recovery barrel (510); the reaction kettle (4) further comprises a slide rail (430); the slide rail (430) surrounds the kettle body (410) along the circumference of the kettle body (410) and is fixedly connected to the outer wall thereof; the other end of the connecting rod (520) is slidably connected to the slide rail (430); The organic lithium recovery barrel (530) is open at the top, has an inner diameter greater than the outer diameter of the graphite recovery barrel (510), and is sleeved on the outside of the graphite recovery barrel (510); The mounting end of the driving motor (540) is fixedly connected to the upper edge of the organic lithium recovery barrel (530); The transmission assembly (550) comprises a driving member (551) and a driven member (552); the driving member (551) is fixedly connected to the output end of the driving motor (540); the driven member (552) is fixedly connected to the outer wall of the graphite recovery barrel (510); the driving member (551) and the driven member (552) are in transmission connection; the driving motor (540) drives the graphite recovery barrel (510) to rotate about its axis through the transmission assembly (550).

3. A lithium-ion battery negative electrode material recovery device according to claim 2, characterized in that: The slide rail (430) is a grooved slide rail, the grooves are arranged in the horizontal direction, the bottom of the slide rail is fixedly connected to the outer wall of the kettle body (410), and the grooves are contracted inwards; A universal ball (521) is detachably connected to the side surface of the movable end of the connecting rod (520), and the ball body of the universal ball (521) is clamped in the slide rail (430).

4. A lithium-ion battery negative electrode material recovery device according to claim 2, characterized in that: The active member (551) is a gear, the output end of the drive motor (540) is vertically upward, the axle of the gear is fixedly connected to the output end of the drive motor (540), the driven member (552) is a gear ring, the gear ring is horizontally sleeved on the middle part of the outer wall of the graphite recovery barrel (510) and fixedly connected thereto, and the gear meshes with the gear ring.

5. A lithium-ion battery negative electrode material recovery device according to claim 2, characterized in that: A liquid outlet is provided at the lower end of the side wall of the organic lithium recovery barrel (530), the bottom of the organic lithium recovery barrel (530) is detachably connected to its side wall, and the bottom of the graphite recovery barrel (510) is detachably connected to its side wall.

6. A lithium-ion battery negative electrode material recovery device according to claim 2, characterized in that: The solid-liquid separation component (5) further comprises an electric heating net (560), wherein the electric heating net (560) is fixedly connected to the bottom of the graphite recovery barrel (510).

7. A lithium-ion battery negative electrode material recovery device according to claim 1, characterized in that: The propulsion assembly (130) comprises a telescopic cylinder (131) and a slag pushing plate (132); the mounting end of the telescopic cylinder (131) is fixedly connected to the inner wall of the furnace body (110), and the output end is aligned with the graphite slag outlet (112); one side of the slag pushing plate (132) is fixedly connected to the output end of the telescopic cylinder (131), and the lower side of the slag pushing plate (132) is in contact with the upper end surface of the copper liquid leakage net (120).

8. A lithium-ion battery negative electrode material recovery device according to claim 1, characterized in that: A transfer belt (310) is provided at the bottom of the graphite slag transfer channel (3), and two ends of the upper end surface of the transfer belt (310) correspond to the graphite slag outlet (112) and the graphite slag inlet (411) respectively.

9. A lithium-ion battery negative electrode material recovery device according to claim 1, characterized in that: It also includes an exhaust gas purification device. The side wall of the furnace body (110) is provided with an exhaust port, and the exhaust port is connected to the exhaust gas purification device.

10. A lithium-ion battery negative electrode material recovery device according to claim 1, characterized in that: It also comprises a lithium ion battery negative electrode crushing device, which is located above the furnace body (110), and the discharge end of the lithium ion battery negative electrode crushing device is connected to the feed inlet (111) of the calcining furnace.

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