Lithium ion battery black powder reduction roasting furnace and method

Abstract

The application belongs to the technical field of recycling devices, and specifically discloses a lithium ion battery black powder reduction roasting furnace and method, which comprises a heating cavity, a rotating rod and a transmission rod are arranged on the heating cavity and rotate, a mounting rod is fixed between the rotating rod and the transmission rod, a plurality of mounting pipes are fixed on the mounting rod at equal intervals, a plow paddle is fixed to the end of the mounting pipe, a side plate is fixed to the plow paddle, the side plate abuts against the inner wall of the heating cavity, a filter plate is fixed to the part where the plow paddle is connected with the mounting pipe, a hole plate is fixed to the middle part of the inner wall of the mounting pipe, a sliding rod penetrates through the hole plate, a counterweight is fixed to the end of the sliding rod away from the filter plate, and a piston is fixed to the end of the sliding rod away from the counterweight. The plow paddle is used for crushing the caked black powder and the solid reducing agent, and the crushed black powder and the solid reducing agent are simultaneously moved, so that the black powder in the heating cavity is subjected to roasting reduction processing.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of recycling devices, and specifically discloses a lithium ion battery black powder reduction roasting furnace and a method. BACKGROUND

[0002] With the rapid development of electric vehicles and portable electronic devices, the use of lithium ion batteries has increased dramatically, and the disposal of a large number of waste lithium ion batteries has followed. The waste lithium ion batteries contain abundant valuable metals such as lithium, cobalt, nickel, and manganese, and have high recycling value. Among them, the black powder (i.e. electrode material powder) is a key material in the recycling process, which needs to be treated by reduction roasting to realize the reduction of metal oxides and subsequent efficient extraction.

[0003] At present, the reduction roasting of lithium ion battery black powder is mostly carried out by using fixed bed or rotary kiln and other equipment. However, the existing roasting equipment often has the following problems in the treatment process: first, the black powder and solid reducing agent (such as carbon powder) are not uniformly mixed, which leads to insufficient reduction reaction of the black powder; second, the black powder is easy to agglomerate, which affects the heat conduction and gas diffusion of the black powder, and further reduces the reaction efficiency of the black powder; third, the traditional stirring device is easy to cause dust raising or equipment inner wall wear, which affects the service life of the equipment and the operating environment.

[0004] In addition, the existing technology has a single way of introducing gas reducing agent, which often cannot fully contact with solid materials, further limiting the rate and completeness of the reduction reaction. Therefore, it is urgent to develop a reduction roasting device and method that can realize efficient mixing of black powder and reducing agent, prevent agglomeration, improve reaction efficiency, and reduce energy consumption. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a lithium ion battery black powder reduction roasting furnace to solve the above problems.

[0006] To achieve the above purpose, the present application provides a lithium ion battery black powder reduction roasting furnace, which comprises a heating cavity, a heating structure, a material inlet structure, and a stirring structure. A plurality of mounting pipes are fixed at equal intervals on the stirring structure. The mounting pipe is a tubular structure with one end sealed. The end of the mounting pipe is fixed with a plow paddle. The part where the plow paddle and the mounting pipe are connected is fixed with a filter plate.

[0007] The plow blade is fixed with a side plate, the inner cavity of the mounting pipe is communicated with the inner cavity composed of the plow blade and the side plate through the filter plate, the side plate abuts against the inner wall of the heating cavity, the middle part of the inner wall of the mounting pipe is fixed with a hole plate, the hole plate is connected with a reciprocating pushing structure, the reciprocating pushing structure comprises a piston, the hole plate is penetrated by a sliding rod, the end of the sliding rod away from the filter plate is fixed with a counterweight, the piston is fixed at the end of the sliding rod away from the counterweight, the inner wall of the mounting pipe is fixed with a limiting ring, the limiting ring abuts against the piston, and the mounting pipe and the plow blade are vertically distributed.

[0008] The middle part of the heating cavity is fixed with a gas injection port, the upper part of the heating cavity is fixed with a gas conveying pipe, a plurality of spray heads are fixed on the gas conveying pipe and the gas injection port, the discharge end of the spray head is opposite to the filter plate, and the spray heads on the gas injection port are inclined downward.

[0009] When the stirring structure rotates, the plow blade moves with the material, and the counterweight drives the sliding rod and the piston to reciprocate in the mounting pipe under the action of gravity, so that the gas reducing agent is periodically sucked or discharged through the filter plate, and the forced dispersion and dynamic circulation of the gas reducing agent in the material layer are realized.

[0010] In the above technical scheme, further, the stirring structure comprises a rotating rod rotating on the heating cavity and a transmission rod, the mounting rod is fixed between the rotating rod and the transmission rod, the mounting pipe is fixed on the mounting rod, the lower part of the heating structure is fixed with a support, the support is fixed with a transmission motor, the output end of the transmission motor is fixed with the transmission rod, and the cross section of the plow blade is an isosceles triangular structure.

[0011] In the above technical scheme, further, a plurality of mounting rods are distributed, the plurality of mounting rods are equally spaced between the rotating rod and the transmission rod, and the mounting rod is a U-shaped structure.

[0012] In the above technical scheme, further, the material port structure comprises a first filling port and a second filling port fixed on the upper part of the heating cavity, the lower part of the heating cavity is fixed with a discharge port away from the second filling port, and the upper part of the heating cavity is fixed with an exhaust port.

[0013] In the above technical scheme, further, the heating structure is sleeved outside the heating cavity, the exhaust port, the first filling port, the second filling port and the discharge port all penetrate the heating structure, and the wiring end of the gas injection port also penetrates the heating structure.

[0014] In the above technical scheme, further, the structure of the gas injection port is the same as that of the gas conveying pipe, and the external connection end of the gas conveying pipe and the gas injection port penetrates the heating structure.

[0015] In the above technical solution, the side of the plow blade near the side plate is inclined, and the surfaces of the plow blade and the side plate are both smooth.

[0016] A method for reducing black powder in lithium-ion batteries includes the following steps:

[0017] S1. Filler: The treated recycled black powder is added to the interior of the heating chamber through the first filler port, and the solid reducing agent is added to the interior of the heating chamber through the second filler port. Then the heating structure is turned on to heat the heating chamber.

[0018] S2. Stirring: Start the drive motor. The output shaft of the drive motor drives the mounting rod on the rotating rod to rotate through the transmission rod, so that the plow blades on the mounting rod can impact, crush and mix the black powder and solid reducing agent.

[0019] S3. Reduction: During the mixing and crushing process of black powder and solid reducing agent, the black powder can continuously absorb heat from the inner wall of the heating chamber. Then, gaseous reducing agent is transported into the interior of the heating chamber through the gas supply pipe and jet nozzle, so that the gaseous reducing agent works with the solid reducing agent to reduce the black powder.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In actual use, the operator injects solid reducing agent, gaseous reducing agent and black powder recovered from lithium-ion batteries into the heating chamber in advance. The end of the transmission rod away from the mounting rod is connected to the transmission motor. When the transmission motor is working, the output shaft of the transmission motor can drive the mounting rod to rotate through the transmission rod. The mounting rod can drive the plow blades through the mounting tube to impact, crush and stir the solid reducing agent and black powder inside the heating chamber, thereby realizing the mixing of solid reducing agent and black powder, which facilitates the mixing of black powder and reducing agent.

[0022] 2. The tip of the plow blade in the roasting furnace can impact the black powder and solid reducing agent, thereby crushing the agglomerated black powder and solid reducing agent. At the same time, the plow blade can also drive the crushed black powder and solid reducing agent upward, realizing the rapid dispersion and mixing of black powder and solid reducing agent inside the heating chamber. When the black powder and solid reducing agent inside the heating chamber move, the installation pipe can drive the gaseous reducing agent inside the heating chamber to transport to the black powder, realizing the rapid reduction treatment of black powder inside the heating chamber.

[0023] 3、The jet port and the gas conveying pipe in the calcination furnace can convey gaseous reducing agent to the inside of the heating cavity, the jet port is arranged on the heating cavity at the side where the plough-shaped paddle rotates forward, when the mounting rod drives the plough-shaped paddle to move from the jet port to the gas conveying pipe, the gaseous reducing agent sprayed by the jet port through the nozzle can blow the solid reducing agent and black powder around the filter plate, so that the solid reducing agent and black powder are quickly separated from the plough-shaped paddle, the solid reducing agent and black powder are prevented from blocking the filter plate, the installation pipe is facilitated to suck the gaseous reducing agent in the heating cavity, the gaseous reducing agent in the heating cavity is facilitated to be transported by the installation pipe, and then the pulverized black powder and the gaseous reducing agent are contacted. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present application;

[0025] Figure 2 It is a sectional view of the present application; Figure 1

[0026] Figure 3 It is a connection structure diagram of the gas conveying pipe and the jet port and the heating cavity in the present application;

[0027] Figure 4 It is a connection structure diagram of the filter plate and the plough-shaped paddle and the installation pipe in the present application;

[0028] Figure 5 It is an enlarged view of A in the present application; Figure 2

[0029] Figure 6 It is a connection structure diagram of the installation pipe and the mounting rod in the present application;

[0030] Figure 7 It is a penetration schematic diagram of the slide rod and the hole plate in the present application;

[0031] Figure 8 It is a connection structure diagram of the installation pipe and the plough-shaped paddle in the present application.

[0032] 1, heating structure; 11, gas conveying pipe; 12, first filling port; 13, second filling port; 14, discharge port; 15, support; 16, exhaust port; 17, jet port; 18, nozzle; 19, heating cavity; 2, transmission motor; 3, rotating rod; 31, mounting rod; 32, transmission rod; 4, plough-shaped paddle; 41, side plate; 42, filter plate; 5, installation pipe; 51, piston; 52, limiting ring; 53, hole plate; 54, slide rod; 55, counterweight. DETAILED DESCRIPTION

[0033] In order to enable the above-mentioned purposes, features and advantages of the present application to be more clearly understood, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0034] ​​In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be recognized by one skilled in the art that the present application can be practiced without the specific details described herein. In other instances, well-known methods, procedures, components and circuits have not been described in detail so as not to obscure aspects of the present application.

[0035] Embodiment one: please refer to Figures 1-8 As shown in the figure, the present application provides a technical solution:

[0036] The present application is a kind of lithium ion battery black powder reduction roasting furnace, including heating cavity 19, heating structure 1, material port structure and stirring structure, a plurality of installation pipes 5 are fixed at equal intervals on the stirring structure, the installation pipe 5 is a sealed tubular structure at one end, the end of the installation pipe 5 is fixed with plow blade 4, the part where the plow blade 4 and the installation pipe 5 are connected is fixed with filter plate 42;

[0037] The side plate 41 is fixed on the plow blade 4, the inner cavity of the installation pipe 5 is communicated with the inner cavity composed of the plow blade 4 and the side plate 41 through the filter plate 42 and the side plate 41, the side plate 41 and the inner wall of the heating cavity 19 abut, the middle part of the inner wall of the installation pipe 5 is fixed with the perforated plate 53, the reciprocating pushing structure is connected on the perforated plate 53, the reciprocating pushing structure includes piston 51, the slide rod 54 is penetrated through the perforated plate 53, the counterweight 55 is fixed on the end of the slide rod 54 away from the filter plate 42, the piston 51 is fixed on the end of the slide rod 54 away from the counterweight 55, the limit ring 52 is fixed on the inner wall of the installation pipe 5, the limit ring 52 and the piston 51 abut, the installation pipe 5 and the plow blade 4 are vertically distributed;

[0038] The middle part of the heating cavity 19 is fixed with the gas injection port 17, the upper part of the heating cavity 19 is fixed with the gas conveying pipe 11, a plurality of spray heads 18 are fixed on the gas conveying pipe 11 and the gas injection port 17, the discharge end of the spray head 18 is opposite to the filter plate 42, the spray heads 18 on the gas injection port 17 are inclined downwardly distributed;

[0039] The stirring structure includes the rotating rod 3 rotating on the heating cavity 19 and the transmission rod 32, the mounting rod 31 is fixed between the rotating rod 3 and the transmission rod 32, the installation pipe 5 is fixed on the mounting rod 31, the lower part of the heating structure 1 is fixed with the support 15, the transmission motor 2 is fixed on the support 15, the output end of the transmission motor 2 and the transmission rod 32 are fixed, when the stirring structure rotates, the plow blade 4 drives the material to move, at the same time, the counterweight 55 drives the slide rod 54 and the piston 51 to reciprocate in the installation pipe 5 under the action of gravity, so as to periodically suck or discharge the gas reducing agent through the filter plate 42, realizing the forced dispersion and dynamic circulation of the gas reducing agent in the material layer;

[0040] In actual use, the solid reducing agent, the gaseous reducing agent and the black powder recovered from the lithium ion battery are injected into the inside of the heating cavity 19 in advance, the transmission rod 32 is connected to the transmission motor 2 at the end away from the mounting rod 31, when the transmission motor 2 works, the output shaft of the transmission motor 2 can drive the mounting rod 31 to rotate through the transmission rod 32, the mounting rod 31 can drive the plow-shaped paddle 4 to impact, crush and stir the solid reducing agent and the black powder in the inside of the heating cavity 19, so as to realize the mixing of the solid reducing agent and the black powder;

[0041] According to the existing process of reducing roasting of the black powder recovered from the lithium ion battery, the rotating speed of the stirrer cannot be too fast when the black powder recovered from the lithium ion battery is reduced and roasted, and the rotating speed of the stirrer can only realize the mixing of the black powder and the solid reducing agent or the gaseous reducing agent. The advantage of this design is that the dust raising phenomenon in the inside of the roasting furnace can be avoided, and the excessive wear of the inner wall of the roasting furnace can also be avoided. In order to realize this process, the following structure is proposed.

[0042] Embodiment two: please refer to Figures 1-8 As shown in the figure, based on the basis of embodiment one, the present application provides a technical solution, which is different from embodiment one, in that the tip of the plow-shaped paddle 4 can impact the black powder and the solid reducing agent, so as to crush the caked black powder and the solid reducing agent, at the same time, the plow-shaped paddle 4 can also drive the crushed black powder and the solid reducing agent to move upward, so as to realize the rapid dispersion and mixing of the black powder and the solid reducing agent in the inside of the heating cavity 19. When the black powder and the solid reducing agent in the inside of the heating cavity 19 move, the mounting pipe 5 can drive the gaseous reducing agent in the inside of the heating cavity 19 to be delivered to the black powder, so as to realize the rapid reduction treatment of the black powder in the inside of the heating cavity 19.

[0043] When the black powder is reduced and roasted in the inside of the heating cavity 19, the black powder will have certain stickiness, and as the black powder is heated in the inside of the heating cavity 19, the stickiness of the black powder will gradually decrease, so as to make the black powder and the solid reducing agent be distributed in the heating cavity 19 in a loose manner. In order to avoid that too much black powder adheres to the filter plate 42, the plow-shaped paddle 4 abuts against the inner wall of the heating cavity 19 when it is used.

[0044] The mounting rod 31 is distributed in multiple, and the multiple mounting rods 31 are distributed at equal intervals between the rotating rod 3 and the transmission rod 32, and the mounting rod 31 is in a U-shaped structure.

[0045] The cross section of the plow-shaped paddle 4 is in an isosceles triangular structure, the mounting pipe 5 is in a tubular structure with one end sealed, the filter plate 42 is embedded in the open end of the mounting pipe 5, and the inner cavity of the mounting pipe 5 is communicated with the inner cavity composed of the plow-shaped paddle 4, the filter plate 42 and the side plate 41.

[0046] The material inlet structure comprises a first filler inlet 12 and a second filler inlet 13 fixed on the upper portion of the heating cavity 19, and a discharge outlet 14 is fixed on the lower portion of the heating cavity 19 away from the second filler inlet 13, and an exhaust outlet 16 is fixed on the upper portion of the heating cavity 19;

[0047] In order to mix the smut with the solid reducing agent and the gaseous reducing agent sufficiently, the mounting rod 31 inside the heating cavity 19 is provided with a plurality of mounting rods 31, and the plough-shaped paddle 4 connected to each mounting rod 31 is also provided with a plurality of plough-shaped paddles 4. When the mounting rod 31 drives the plough-shaped paddle 4 to contact the smut and the solid reducing agent, the tip of the plough-shaped paddle 4 can impact the smut and the solid reducing agent, thereby crushing the smut and the solid reducing agent, and at the same time, the plough-shaped paddle 4 can also drive the crushed smut and solid reducing agent to move upward, thereby rapidly dispersing and mixing the crushed smut and solid reducing agent.

[0048] As the mounting rod 31 drives the plough-shaped paddle 4 to move upward, the smut and the solid reducing agent inside the heating cavity 19 are also separated from the plough-shaped paddle 4, at this time, the counterweight 55, the sliding rod 54 and the piston 51 can also move downward under the action of gravity, which can realize that the upper portion of the mounting pipe 5 is in a negative pressure state, thereby enabling the gaseous reducing agent inside the heating cavity 19 to enter the inside of the mounting pipe 5, and thereby enabling the gaseous reducing agent above the heating cavity 19 to be introduced downward, which facilitates the smut driven upward by the plough-shaped paddle 4 to contact the gaseous reducing agent introduced downward by the mounting pipe 5.

[0049] When the mounting rod 31 drives the plough-shaped paddle 4 to move downward, the smut and the solid reducing agent inside the heating cavity 19 will also contact the plough-shaped paddle 4, at this time, the counterweight 55, the sliding rod 54 and the piston 51 can also move downward under the action of gravity, thereby enabling the gaseous reducing agent inside the mounting pipe 5 to be discharged, and realizing that the gaseous reducing agent inside the mounting pipe 5 is mixed with the smut.

[0050] Embodiment three: please refer to Figures 1-8 As shown in the figure, based on the basis of embodiment one, the present application provides a technical scheme, which is different from embodiment one, that is, the gas injection port 17 and the gas conveying pipe 11 in the embodiment can convey gaseous reducing agent into the inside of the heating cavity 19, the gas injection port 17 is arranged on the heating cavity 19 on the side where the plough-shaped paddle 4 rotates forward, when the mounting rod 31 drives the plough-shaped paddle 4 to move from the gas injection port 17 to the gas conveying pipe 11, the gaseous reducing agent sprayed by the gas injection port 17 through the spray head 18 can blow the solid reducing agent and the smut around the filter plate 42, thereby enabling the solid reducing agent and the smut to be quickly separated from the plough-shaped paddle 4, avoiding the solid reducing agent and the smut from blocking the filter plate 42, affecting the mounting pipe 5 to suck the gaseous reducing agent in the heating cavity 19, and facilitating the mounting pipe 5 to transport the gaseous reducing agent inside the heating cavity 19.

[0051] The heating structure 1 is tied outside the heating cavity 19, the exhaust port 16, the first filler port 12, the second filler port 13, the discharge port 14 are all penetrated by the heating structure 1, and the connection end of the jet port 17 is also penetrated by the heating structure 1.

[0052] The jet port 17 and the gas conveying pipe 11 have the same structure, and the outer connection end of the gas conveying pipe 11 and the jet port 17 penetrates the heating structure 1.

[0053] The side of the plow blade 4 close to the side plate 41 is inclined, and the surfaces of the plow blade 4 and the side plate 41 are smooth structures;

[0054] The treated and recovered black powder is added into the heating cavity 19 through the first filler port 12, and the solid reducing agent is added into the heating cavity 19 through the second filler port 13, then the heating structure 1 is started to heat the heating cavity 19, when the black powder and the solid reducing agent are mixed and crushed in the heating cavity 19, the black powder and the solid reducing agent can continuously absorb the heat of the inner wall of the heating cavity 19, then the external gas reducing agent conveying structure conveys the gas reducing agent into the heating cavity 19 through the gas conveying pipe 11 and the jet port 17, so that the gas reducing agent cooperates with the solid reducing agent to reduce the black powder;

[0055] It should be noted that in order to stabilize the reduction treatment of the black powder in the heating cavity 19, control valves need to be arranged on the first filler port 12, the second filler port 13, the exhaust port 16 and the discharge port 14;

[0056] When the black powder is reduced in the heating cavity 19, the staff connects the air extraction structure with the exhaust port 16, so that the air extraction structure can extract the exhaust gas in the heating cavity 19 through the exhaust port 16.

[0057] The jet port 17 and the gas conveying pipe 11 can convey the gas reducing agent into the heating cavity 19, the jet port 17 is arranged on the heating cavity 19 at the side where the plow blade 4 rotates forward, when the mounting rod 31 drives the plow blade 4 to move from the jet port 17 to the gas conveying pipe 11, the gas reducing agent sprayed by the jet port 17 through the jet head 18 can blow the solid reducing agent powder and the black powder around the filter plate 42, so that the solid reducing agent and the black powder are quickly separated from the plow blade 4, avoiding the solid reducing agent and the black powder blocking the filter plate 42, affecting the suction of the gas reducing agent in the heating cavity 19 by the mounting pipe 5, and facilitating the transportation of the gas reducing agent in the heating cavity 19 by the mounting pipe 5.

[0058] A lithium ion battery black powder reduction method, comprising the following steps:

[0059] S1, the filler, the processed recycling black powder is added to the inside of the heating cavity 19 through the first filler port 12, and the solid reducing agent is added to the inside of the heating cavity 19 through the second filler port 13, and then the heating structure 1 is started to heat the heating cavity 19;

[0060] S2, stirring, the transmission motor 2 is started to work, the output shaft of the transmission motor 2 drives the rotating rod 3 through the transmission rod 32, and the rotating rod 3 drives the installation rod 31 to rotate, so that the plow paddle 4 on the installation rod 31 can impact, crush and mix the black powder and the solid reducing agent;

[0061] S3, reduction, in the process of mixing and crushing, the black powder and the solid reducing agent can continuously absorb the heat of the inner wall of the heating cavity 19, and then the gas reducing agent is transported into the inside of the heating cavity 19 through the gas pipe 11 and the gas jet port 17, so that the gas reducing agent cooperates with the solid reducing agent to reduce the black powder.

[0062] The above shows and describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited to the above embodiments, and the above embodiments and descriptions are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application.

Claims

1. A lithium ion battery black powder reduction roaster, comprising a heating cavity (19), a heating structure (1), a charging port structure and a stirring structure, characterized in that: A plurality of installation tubes (5) are fixed on the stirring structure at equal intervals, the installation tube (5) is a tubular structure with one end sealed, the end of the installation tube (5) is fixed with a plow blade (4), and the part where the plow blade (4) and the installation tube (5) are connected is fixed with a filter plate (42); The inner cavity of the installation tube (5) is communicated with the inner cavity formed by the plow blade (4), the filter plate (42) and the side plate (41), the side plate (41) abuts against the inner wall of the heating cavity (19), the middle part of the inner wall of the installation tube (5) is fixed with a hole plate (53), the hole plate (53) is connected with a reciprocating pushing structure, the reciprocating pushing structure comprises a piston (51), the hole plate (53) penetrates through a sliding rod (54), one end of the sliding rod (54) away from the filter plate (42) is fixed with a counterweight (55), the piston (51) is fixed at one end of the sliding rod (54) away from the counterweight (55), the inner wall of the installation tube (5) is fixed with a limiting ring (52), the limiting ring (52) abuts against the piston (51), and the installation tube (5) and the plow blade (4) are vertically distributed. The middle part of the heating cavity (19) is fixed with a gas injection port (17), the upper part of the heating cavity (19) is fixed with a gas conveying pipe (11), a plurality of spray heads (18) are fixed on the gas conveying pipe (11) and the gas injection port (17), the discharge end of the spray head (18) is opposite to the filter plate (42), and the spray heads (18) on the gas injection port (17) are inclined downward. When the stirring structure rotates, the plow blade (4) moves with the material, and at the same time, the counterweight (55) drives the sliding rod (54) and the piston (51) to reciprocate in the installation tube (5) under the action of gravity, so as to periodically suck or discharge the gas reducing agent through the filter plate (42), and realize the forced dispersion and dynamic circulation of the gas reducing agent in the material layer.

2. The lithium ion battery black powder reduction roaster of claim 1, wherein, The stirring structure comprises a rotating rod (3) and a transmission rod (32) rotating on a heating cavity (19), a mounting rod (31) is fixed between the rotating rod (3) and the transmission rod (32), the installation tube (5) is fixed on the mounting rod (31), the lower part of the heating structure (1) is fixed with a support (15), the support (15) is fixed with a transmission motor (2), the output end of the transmission motor (2) is fixed with the transmission rod (32), and the cross section of the plow blade (4) is an isosceles triangular structure.

3. The lithium-ion battery black powder reduction roaster of claim 2, wherein, A plurality of mounting rods (31) are distributed, and the plurality of mounting rods (31) are distributed at equal intervals between the rotating rod (3) and the transmission rod (32), and the mounting rod (31) is a U-shaped structure.

4. The lithium-ion battery black powder reduction roaster of claim 3, wherein, The material port structure comprises a first filling port (12) and a second filling port (13) fixed on the upper part of the heating cavity (19), the lower part of the heating cavity (19) is fixed with a discharge port (14) away from the second filling port (13), and the upper part of the heating cavity (19) is fixed with an exhaust port (16).

5. The lithium-ion battery black powder reduction roaster of claim 4, wherein the reduction roaster is characterized by: The heating structure (1) is sleeved outside the heating cavity (19), the exhaust port (16), the first filler port (12), the second filler port (13), the discharge port (14) are all penetrated by the heating structure (1), and the wiring end of the air jet port (17) is also penetrated by the heating structure (1).

6. The lithium-ion battery black powder reduction roaster of claim 5, wherein the reduction roaster is characterized by: The air jet port (17) and the gas conveying pipe (11) are of the same structure, and the external connecting end of the gas conveying pipe (11) and the air jet port (17) penetrates the heating structure (1).

7. The lithium-ion battery black powder reduction roaster of claim 6, wherein the reduction roaster is characterized by: The side of the plough blade (4) close to the side plate (41) is a slope, and the surfaces of the plough blade (4) and the side plate (41) are smooth structures.

8. A method for reducing the black powder of lithium ion batteries, characterized in that the method is performed using the lithium ion battery black powder reduction roaster according to claim 7. The method comprises the following steps: S1, filling, adding the treated recycled black powder into the inside of the heating cavity (19) through the first filler port (12), and adding the solid reducing agent into the inside of the heating cavity (19) through the second filler port (13), and then starting the heating structure (1) to heat the heating cavity (19); S2, stirring, starting the transmission motor (2) to work, and the output shaft of the transmission motor (2) drives the installation rod (31) on the rotating rod (3) to rotate through the transmission rod (32), so as to realize the impact, crushing and mixing of the plough blade (4) on the installation rod (31) on the black powder and the solid reducing agent; S3, reduction, in the process of mixing and crushing, the black powder and the solid reducing agent can continuously absorb the heat of the inner wall of the heating cavity (19), and then the gas reducing agent is conveyed into the inside of the heating cavity (19) through the gas conveying pipe (11) and the air jet port (17), so as to make the gas reducing agent cooperate with the solid reducing agent to reduce the black powder.

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