Equipment and method for extracting and recycling nickel, cobalt and lithium metals in lithium battery through pyrometallurgy

Abstract

The invention discloses equipment and a method for extracting and recycling nickel, cobalt and lithium metals in a lithium battery through pyrometallurgy, and relates to the technical field of lithium battery recycling equipment. The medium-frequency induction melting furnace comprises a medium-frequency induction melting furnace body, and a vibration mechanism and a cooling assembly are arranged on the medium-frequency induction melting furnace body; a medium-frequency induction melting furnace lining is arranged in the medium-frequency induction melting furnace body, and a plurality of supporting legs are fixedly connected to the bottom of the medium-frequency induction melting furnace body. By arranging the vibration mechanism, the problems that in the using process of existing equipment for extracting and recycling nickel, cobalt and lithium metal in a lithium battery through pyrometallurgy, part of liquid lithium and other metal compounds formed in the smelting process can be attached to the inner wall of a furnace lining, and the attachments can be gradually stacked and thickened as time goes on and in the multiple smelting processes; and a heat insulation layer is formed between the furnace lining and metal in the furnace, so that the heat transfer efficiency of the furnace lining is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of lithium battery recycling equipment, and in particular relates to equipment and a method for extracting and recycling nickel, cobalt and lithium metals in lithium batteries by pyrometallurgy. Background Art

[0002] With the rapid development of modern science and technology, the widespread application of electronic products such as mobile phones, laptops, electric vehicles, etc., the demand for lithium batteries as an efficient and lightweight energy storage device continues to grow. However, the service life of lithium batteries is limited. When the battery performance declines or reaches the end of its service life, a large number of waste lithium batteries will be generated. According to statistics, the number of waste lithium batteries generated each year in the world is huge, and it is increasing year by year. If these waste lithium batteries are not properly handled, they will not only cause serious pollution to the environment, but also waste the precious metal resources contained therein. Therefore, these batteries must be recycled. Among the many recycling methods, pyrometallurgy is also one of the common recycling methods.

[0003] However, during the use of existing pyrometallurgical equipment for extracting and recycling nickel, cobalt and lithium metals in lithium batteries, some liquid lithium and other metal compounds formed during the smelting process will adhere to the inner wall of the furnace lining. Over time and after multiple smelting processes, these attachments will gradually accumulate and become thicker, forming an insulating layer between the furnace lining and the metal in the furnace, reducing the heat transfer efficiency of the furnace lining. Summary of the invention

[0004] The purpose of the present invention is to provide an equipment and method for extracting and recovering nickel, cobalt and lithium metals in lithium batteries by pyrometallurgy. By setting a vibration mechanism, the problem that during use of the existing equipment for extracting and recovering nickel, cobalt and lithium metals in lithium batteries by pyrometallurgy is solved, part of the liquid lithium and other metal compounds formed in the smelting process will adhere to the inner wall of the furnace lining. With the passage of time and multiple smelting processes, these attachments will gradually accumulate and become thicker, and form a heat insulation layer between the furnace lining and the metal in the furnace, thereby reducing the heat transfer efficiency of the furnace lining.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a device and method for extracting and recovering nickel, cobalt and lithium metals in lithium batteries by pyrometallurgy, comprising a medium frequency induction melting furnace body, on which a vibration mechanism and a cooling component are arranged;

[0007] A medium frequency induction melting furnace lining is arranged in the medium frequency induction melting furnace body, a plurality of supporting legs are fixedly connected to the bottom of the medium frequency induction melting furnace body, two supporting plates are fixedly connected to the outer walls of the plurality of supporting legs, a slide groove is provided on the side of the two supporting plates close to each other, a collecting box is slidably connected to the inner walls of the two slide grooves, a plurality of leakage grooves are provided at the bottom of the medium frequency induction melting furnace lining, an electric furnace is arranged on the right side of the medium frequency induction melting furnace body, the vibration mechanism comprises a vibration component, a reset component and two adapter components, the vibration component comprises a rotating shaft 1 that rotates and runs through the medium frequency induction melting furnace body, a motor 1 is fixedly connected to the bottom of the medium frequency induction melting furnace body, an output shaft of the motor 1 is fixedly connected to the rotating shaft 1 through a coupling, a semi-gear is fixedly connected to the top side extension of the rotating shaft 1, an L-shaped fixing plate is fixedly connected to the top of the medium frequency induction melting furnace lining, a rack is fixedly connected to the bottom of the L-shaped fixing plate, and the rack is meshed with the semi-gear.

[0008] Furthermore, the reset assembly includes a rectangular support plate fixedly connected to the top of the medium frequency induction melting furnace body, the right side of the rectangular support plate located on the right side is fixedly connected to the rack, a telescopic rod 1 is fixedly connected between the two rectangular support plates, a strong spring is sleeved on the outer wall of the telescopic rod 1, and the left and right sides of the strong spring are respectively fixedly connected to the two rectangular support plates.

[0009] Furthermore, the adapter assembly includes a circular groove formed on the body of the medium frequency induction melting furnace, and a connecting plate is fixedly connected to the outer wall of the lining of the medium frequency induction melting furnace.

[0010] Furthermore, a telescopic rod 2 is fixedly connected to the inner wall of the circular groove, the left side of the telescopic rod 2 is fixedly connected to the connecting plate, a spring is sleeved on the outer wall of the telescopic rod 2, the right side of the spring is fixedly connected to the inner wall of the circular groove, and the left side of the spring is fixedly connected to the connecting plate.

[0011] Furthermore, a rectangular groove is provided on the top of the medium frequency induction melting furnace body, an L-shaped limit plate is fixedly connected to the outer wall of the medium frequency induction melting furnace lining, and the bottom of the L-shaped limit plate slides and extends into the rectangular groove.

[0012] Furthermore, the cooling assembly includes a support frame fixedly connected to the inner walls of a plurality of support legs, and a second rotating shaft is rotatably passed through the center axis of the support frame.

[0013] Furthermore, the bottom of the support frame is fixedly connected to the motor 2, and the output shaft of the motor 2 is fixedly connected to the rotating shaft 2 via a coupling. A fan is fixedly connected to the top extension of the rotating shaft 2.

[0014] A method for extracting and recovering nickel, cobalt and lithium metals from lithium batteries by pyrometallurgical smelting, comprising the following steps:

[0015] S1: First, the battery monomer is put into the crushing device through the feeding device. The crushing device can crush the battery monomer with electricity. The charged crushing can avoid the risk of explosion and large amount of heat in the crushing process. After crushing, the battery monomer enters the pyrolysis furnace for pyrolysis. The pyrolysis adopts the external heating chamber for calcination. The heat source does not contact the crushed battery, which can avoid the leakage of pyrolysis gas.

[0016] S2: Screening and stripping the pyrolyzed materials. In order to improve the recovery rate of the powder, the stripped copper and aluminum foils are crushed and ground to granulate, and then copper and aluminum particles are obtained;

[0017] S3: When the melting point of lithium is reached in the lining of the medium frequency induction melting furnace, the motor 1 is started, and the motor 1 drives the half gear to rotate through the rotating shaft 1. When the half gear rotates, it drives the lining of the medium frequency induction melting furnace to move to the left through the L-shaped fixing plate and the L-shaped fixing plate. At this time, the telescopic rod 1 and the strong spring are in a compressed state. When the toothed part of the half gear is separated from the rack, the rack will drive the lining of the medium frequency induction melting furnace to move to the right through the L-shaped fixing plate under the action of the elastic force of the strong spring, and so on, so as to generate vibration in the lining of the medium frequency induction melting furnace. In this process, the influence of the vibration of the lining of the medium frequency induction melting furnace on the body of the medium frequency induction melting furnace will be buffered by the action of the telescopic rod 2 and the spring;

[0018] S4: When the lithium melt completely flows into the collection box under the action of vibration, the second motor on the support frame is started, and the second motor drives the fan to rotate through the second rotating shaft to blow air to the collection box, thereby completing the cooling of the lithium melt in the collection box. After the cooling is completed, the lithium can be recovered;

[0019] S5: Black powder will be produced during the stripping and granulation process. After lithium extraction, the cobalt-nickel materials are reduced and smelted in an electric furnace to finally obtain metallic cobalt-nickel.

[0020] The present invention has the following beneficial effects:

[0021] 1. By setting a vibration mechanism, when the melting point of lithium is reached in the lining of the medium frequency induction melting furnace, start the motor 1, and the motor 1 drives the half gear to rotate through the rotating shaft 1. When the half gear rotates, it will drive the lining of the medium frequency induction melting furnace to move to the left through the L-shaped fixing plate and the L-shaped fixing plate. At this time, the telescopic rod 1 and the strong spring are in a compressed state. When the toothed part of the half gear is separated from the rack, the rack will drive the lining of the medium frequency induction melting furnace to move to the right through the L-shaped fixing plate under the action of the elastic force of the strong spring, so as to reciprocate, thereby generating vibration in the lining of the medium frequency induction melting furnace. In this process, the medium The impact of the vibration of the medium frequency induction melting furnace lining on the medium frequency induction melting furnace body will be buffered by the action of the telescopic rod 2 and the spring, so that liquid lithium and other metals can be effectively prevented from adhering to the inner wall of the medium frequency induction melting furnace lining, and the molten metal can be continuously flowed and adjusted in the furnace to avoid local accumulation, thereby ensuring that the metal is more uniform during the cooling and solidification process, improving the quality of metal products and the consistency of crystal grain size, and reducing the formation of attachments on the medium frequency induction melting furnace lining, ensuring good contact between the medium frequency induction melting furnace lining and the metal in the furnace, and maintaining efficient heat transfer;

[0022] 2. By setting up a cooling mechanism, when the lithium melt completely flows into the collection box under the action of vibration, the second motor on the support frame is started, and the second motor drives the fan to rotate through the second shaft to blow air to the collection box, thereby completing the cooling of the lithium melt in the collection box. After the cooling is completed, the lithium can be recovered, which can accelerate the heat dissipation of the lithium melt in the collection box, make the melt cool and solidify faster, greatly shorten the time required for cooling, thereby improving the efficiency of the entire recycling process, and can complete the recovery of lithium in a shorter time, increasing the processing volume per unit time.

[0023] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the local structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the rear side cross-sectional structure of the present invention;

[0028] Figure 4 It is a bottom view structural schematic diagram of the present invention;

[0029] Figure 5 For the present invention Figure 3 A is a schematic diagram of the enlarged structure of the middle part;

[0030] Figure 6 For the present invention Figure 2 Schematic diagram of the enlarged structure of B;

[0031] Figure 7 For the present invention Figure 2 Schematic diagram of the enlarged structure of C in the middle;

[0032] Figure 8 For the present invention Figure 3 Schematic diagram of the enlarged structure of D in the figure.

[0033] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0034] 1. Medium frequency induction melting furnace body; 101. Medium frequency induction melting furnace lining; 102. Support legs; 103. Support plate; 104. Slide; 105. Collecting box; 106. Leakage trough; 107. Electric furnace; 2. Vibration mechanism; 21. Vibration assembly; 211. Rotating shaft 1; 212. Motor 1; 213. Half gear; 214. L-shaped fixing plate; 215. Rack; 22. Reset assembly; 221. Rectangular support plate; 222. Telescopic rod 1; 223. Strong spring; 23. Adapter assembly; 231. Circular groove; 232. Connecting plate; 233. Telescopic rod 2; 234. Spring; 235. Rectangular groove; 236. L-shaped limit plate; 3. Cooling assembly; 301. Support frame; 302. Rotating shaft 2; 303. Motor 2; 304. Fan. DETAILED DESCRIPTION

[0035] 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.

[0036] See also Figure 1-7As shown, the present invention is a device and method for extracting and recovering nickel, cobalt and lithium metals in lithium batteries by pyrometallurgy, comprising a medium frequency induction melting furnace body 1, on which a vibration mechanism 2 and a cooling assembly 3 are arranged, a medium frequency induction melting furnace lining 101 is arranged in the medium frequency induction melting furnace body 1, a plurality of supporting legs 102 are fixedly connected to the bottom of the medium frequency induction melting furnace body 1, two supporting plates 103 are fixedly connected to the outer walls of the plurality of supporting legs 102, a chute 104 is provided on one side of the two supporting plates 103 close to each other, a collecting box 105 is slidably connected to the inner wall of the two chute 104, a plurality of leakage grooves 106 are provided at the bottom of the medium frequency induction melting furnace lining 101, an electric furnace 10 is arranged on the right side of the medium frequency induction melting furnace body 1 7. The vibration mechanism 2 includes a vibration component 21, a reset component 22 and two adapter components 23. The vibration component 21 includes a rotating shaft 211 that rotates and runs through the medium frequency induction melting furnace body 1. The bottom of the medium frequency induction melting furnace body 1 is fixedly connected with a motor 212. The output shaft of the motor 212 is fixedly connected to the rotating shaft 211 through a coupling. A half gear 213 is fixedly connected to the top extension of the rotating shaft 211. The top of the medium frequency induction melting furnace lining 101 is fixedly connected with an L-shaped fixing plate 214. The bottom of the L-shaped fixing plate 214 is fixedly connected with a rack 215. The rack 215 is meshed with the half gear 213. The reset component 22 includes a rectangular support plate 221 fixedly connected to the top of the medium frequency induction melting furnace body 1. The right side of the The right side of the rectangular support plate 221 is fixedly connected to the rack 215, a telescopic rod 1 222 is fixedly connected between the two rectangular support plates 221, a strong spring 223 is sleeved on the outer wall of the telescopic rod 1 222, and the left and right sides of the strong spring 223 are respectively fixedly connected to the two rectangular support plates 221, and the adapter component 23 includes a circular groove 231 opened on the medium frequency induction melting furnace body 1, a connecting plate 232 is fixedly connected to the outer wall of the medium frequency induction melting furnace lining 101, a telescopic rod 233 is fixedly connected to the inner wall of the circular groove 231, the left side of the telescopic rod 233 is fixedly connected to the connecting plate 232, a spring 234 is sleeved on the outer wall of the telescopic rod 233, and the right side of the spring 234 is fixedly connected to the inner wall of the circular groove 231. The left side is fixedly connected to the connecting plate 232, a rectangular groove 235 is provided on the top of the medium frequency induction melting furnace body 1, an L-shaped limiting plate 236 is fixedly connected to the outer wall of the medium frequency induction melting furnace lining 101, and the bottom of the L-shaped limiting plate 236 slides and extends into the rectangular groove 235. By setting the vibration mechanism 2, it is possible to effectively prevent liquid lithium and other metals from adhering to the inner wall of the medium frequency induction melting furnace lining 101, and enable the molten metal to continuously flow and adjust its position in the furnace to avoid local accumulation, thereby ensuring that the metal is more uniform during the cooling and solidification process, improving the quality of metal products and the consistency of crystal grain size, reducing the formation of attachments on the medium frequency induction melting furnace lining 101, and ensuring good contact between the medium frequency induction melting furnace lining 101 and the metal in the furnace.Maintain efficient heat transfer.

[0037] The cooling assembly 3 includes a support frame 301 fixedly connected to the inner wall of a plurality of support legs 102, a rotating shaft 2 302 is rotatably penetrated through the middle axis of the support frame 301, a motor 2 303 is fixedly connected to the bottom of the support frame 301, and the output shaft of the motor 2 303 is fixedly connected to the rotating shaft 2 302 through a coupling. A fan 304 is fixedly connected to the top extension of the rotating shaft 2 302. By setting a cooling mechanism, the heat dissipation of the lithium melt in the collection box 105 can be accelerated, so that the melt is cooled and solidified faster, and the time required for cooling is greatly shortened, thereby improving the efficiency of the entire recycling process, and the lithium recovery can be completed in a shorter time, and the processing volume per unit time is increased.

[0038] A specific application of this embodiment is: when in use, first disassemble the recycled lithium batteries, and separate the copper and aluminum therein after careful physical sorting. Since copper and aluminum have high purity and good quality after physical sorting, and no further smelting and processing are required, they can be sold directly, which can not only quickly realize the conversion of resource recovery value, but also avoid unnecessary energy consumption and complicated smelting process. Then put the nickel, cobalt and lithium required for pyrometallurgy into the lining 101 of the medium frequency induction melting furnace, start the medium frequency induction melting furnace body 1, and heat the medium frequency induction melting furnace lining 101. Since the melting point of lithium is much lower than the melting point of nickel and cobalt, the medium frequency induction melting furnace body 1 is first heated to the melting point of lithium, wherein After the melting point of lithium is reached in the lining 101 of the medium frequency induction melting furnace, the motor 212 is started. The motor 212 drives the half gear 213 to rotate through the rotating shaft 211. When the half gear 213 rotates, it will drive the lining 101 of the medium frequency induction melting furnace to move to the left through the L-shaped fixing plate 214 and the L-shaped fixing plate 214. At this time, the telescopic rod 222 and the strong spring 223 are in a compressed state. When the toothed part of the half gear 213 is separated from the rack 215, the rack 215 will drive the lining 101 of the medium frequency induction melting furnace to move to the right through the L-shaped fixing plate 214 under the action of the elastic force of the strong spring 223, and so on. Vibration is generated in the lining 101 of the medium frequency induction melting furnace. In this process, the vibration of the lining 101 of the medium frequency induction melting furnace affects the medium frequency The impact of the induction melting furnace body 1 will be buffered by the action of the telescopic rod 233 and the spring 234, so that the liquid lithium and other metals can be effectively prevented from adhering to the inner wall of the medium frequency induction melting furnace lining 101, and the molten metal can be continuously flowed and adjusted in the furnace to avoid local accumulation, thereby ensuring that the metal is more uniform during the cooling and solidification process, improving the quality of metal products and the consistency of crystal grain size, and reducing the formation of attachments on the medium frequency induction melting furnace lining 101, ensuring good contact between the medium frequency induction melting furnace lining 101 and the metal in the furnace, maintaining efficient heat transfer, and the melted lithium will flow into the collecting box 105 through the leakage groove 106 under the vibration of the medium frequency induction melting furnace lining 101. When the internal temperature is at the melting point of lithium, nickel and cobalt will not melt. When the lithium melt completely flows into the collection box 105 under the action of vibration, the motor 2 303 on the support frame 301 is started. The motor 2 303 drives the fan 304 to rotate through the rotating shaft 2 302 to blow air to the collection box 105, thereby completing the cooling of the lithium melt in the collection box 105. After the cooling is completed, the lithium is recovered. Finally, in order to avoid the reaction of nickel and cobalt, nickel, cobalt and black powder are put into an electric furnace for reduction smelting. The fan dissipates the heat of the lithium melt in the collection box 105, so that the melt cools and solidifies faster, greatly shortening the time required for cooling, thereby improving the efficiency of the entire recovery process, and can complete the recovery of lithium in a shorter time, increasing the processing volume per unit time. After the lithium collection is completed,Then, the medium frequency induction melting furnace body 1 is heated to the melting point of nickel and cobalt, and the nickel and cobalt are collected by the same operation as above, and then the collected nickel and cobalt are poured into the electric furnace 107, and then the chemical raw materials required for recovering nickel and cobalt are also poured into it, and then the electric furnace 107 is turned on to reduce the nickel and cobalt.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A device for extracting and recovering nickel, cobalt and lithium metals in lithium batteries by pyrometallurgical method, comprising a medium frequency induction melting furnace body (1), wherein a vibration mechanism (2) and a cooling component (3) are arranged on the medium frequency induction melting furnace body (1), It is characterized by: The medium frequency induction melting furnace body (1) is provided with a medium frequency induction melting furnace lining (101), the bottom of the medium frequency induction melting furnace body (1) is fixedly connected with a plurality of support legs (102), the outer walls of the plurality of support legs (102) are fixedly connected with two support plates (103), the two support plates (103) are provided with a slide groove (104) on one side close to each other, the inner walls of the two slide grooves (104) are slidably connected with a collection box (105), the bottom of the medium frequency induction melting furnace lining (101) is provided with a plurality of leakage grooves (106), the right side of the medium frequency induction melting furnace body (1) is provided with an electric furnace (107), and the vibration mechanism (2) comprises a vibration component (21), A reset component (22) and two adapter components (23), the vibration component (21) includes a rotating shaft (211) that rotates and runs through the medium frequency induction melting furnace body (1), the bottom of the medium frequency induction melting furnace body (1) is fixedly connected with a motor (212), the output shaft of the motor (212) is fixedly connected to the rotating shaft (211) through a coupling, a half gear (213) is fixedly connected to the top side extension of the rotating shaft (211), an L-shaped fixing plate (214) is fixedly connected to the top of the medium frequency induction melting furnace lining (101), the bottom of the L-shaped fixing plate (214) is fixedly connected with a rack (215), and the rack (215) is meshed with the half gear (213).

2. The equipment for extracting and recovering nickel, cobalt and lithium metals from lithium batteries by pyrometallurgy according to claim 1, characterized in that: The reset assembly (22) comprises a rectangular support plate (221) fixedly connected to the top of the medium frequency induction melting furnace body (1); the right side of the rectangular support plate (221) located on the right side is fixedly connected to the rack (215); a telescopic rod (222) is fixedly connected between the two rectangular support plates (221); a strong spring (223) is sleeved on the outer wall of the telescopic rod (222); the left and right sides of the strong spring (223) are respectively fixedly connected to the two rectangular support plates (221).

3. The equipment for extracting and recovering nickel, cobalt and lithium metals from lithium batteries by pyrometallurgical method according to claim 2, characterized in that: The adapter assembly (23) comprises a circular groove (231) provided on the medium frequency induction melting furnace body (1), and a connecting plate (232) is fixedly connected to the outer wall of the lining (101) of the medium frequency induction melting furnace.

4. The equipment for extracting and recovering nickel, cobalt and lithium metals from lithium batteries by pyrometallurgy according to claim 3, characterized in that: A second telescopic rod (233) is fixedly connected to the inner wall of the circular groove (231), the left side of the second telescopic rod (233) is fixedly connected to the connecting plate (232), a spring (234) is sleeved on the outer wall of the second telescopic rod (233), the right side of the spring (234) is fixedly connected to the inner wall of the circular groove (231), and the left side of the spring (234) is fixedly connected to the connecting plate (232).

5. The equipment for extracting and recovering nickel, cobalt and lithium metals from lithium batteries by pyrometallurgy according to claim 4, characterized in that: A rectangular groove (235) is provided on the top of the medium frequency induction melting furnace body (1), an L-shaped limiting plate (236) is fixedly connected to the outer wall of the medium frequency induction melting furnace lining (101), and the bottom of the L-shaped limiting plate (236) slides and extends into the rectangular groove (235).

6. The equipment for extracting and recovering nickel, cobalt and lithium metals from lithium batteries by pyrometallurgy according to claim 5, characterized in that: The cooling assembly (3) comprises a support frame (301) fixedly connected to the inner walls of a plurality of support legs (102), and a second rotating shaft (302) is rotatably passed through the middle axis of the support frame (301).

7. The equipment for extracting and recovering nickel, cobalt and lithium metals from lithium batteries by pyrometallurgical method according to claim 6, characterized in that: The bottom of the support frame (301) is fixedly connected to the second motor (303), and the output shaft of the second motor (303) is fixedly connected to the second rotating shaft (302) through a coupling. A fan (304) is fixedly connected to the top extension of the second rotating shaft (302).

8. A method for using a pyrometallurgical extraction and recovery device for nickel, cobalt and lithium metals in lithium batteries, using a pyrometallurgical extraction and recovery device for nickel, cobalt and lithium metals in lithium batteries as described in claim 7, characterized in that: The steps include: S1: First, the battery monomer is put into the crushing device through the feeding device. The crushing device can crush the battery monomer with electricity. The charged crushing can avoid the risk of explosion and large amount of heat in the crushing process. After crushing, the battery monomer enters the pyrolysis furnace for pyrolysis. The pyrolysis adopts the external heating chamber for calcination. The heat source does not contact the crushed battery, which can avoid the leakage of pyrolysis gas. S2: Screening and stripping the pyrolyzed materials. In order to improve the recovery rate of the powder, the stripped copper and aluminum foils are crushed and ground to granulate, and then copper and aluminum particles are obtained; S3: When the melting point of lithium is reached in the lining (101) of the medium frequency induction melting furnace, the motor 1 (212) is started, and the motor 1 (212) drives the half gear (213) to rotate through the rotating shaft 1 (211). When the half gear (213) rotates, it drives the lining (101) of the medium frequency induction melting furnace to move to the left through the L-shaped fixing plate (214) and the L-shaped fixing plate (214). At this time, the telescopic rod 1 (222) and the strong spring (223) are in a compressed state. When the teeth on the half gear (213) are After the rack (215) is partially separated, the rack (215) will drive the lining (101) of the medium frequency induction melting furnace to move rightward through the L-shaped fixing plate (214) under the action of the elastic force of the strong spring (223), and reciprocate in this way, thereby generating vibration in the lining (101) of the medium frequency induction melting furnace. In this process, the influence of the vibration of the lining (101) of the medium frequency induction melting furnace on the body (1) of the medium frequency induction melting furnace will be buffered under the action of the second telescopic rod (233) and the spring (234); S4: When the lithium melt completely flows into the collection box (105) under the action of vibration, the second motor (303) on the support frame (301) is started, and the second motor (303) drives the fan (304) to rotate through the second rotating shaft (302) to blow air to the collection box (105), thereby completing the cooling of the lithium melt in the collection box (105), and the lithium can be recovered after the cooling is completed; S5: Black powder will be produced during the stripping and granulation process. After lithium extraction, the cobalt-nickel materials are reduced and smelted in an electric furnace to finally obtain metallic cobalt-nickel.

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