A negative electrode multi-purpose continuous rotary furnace device and a negative electrode material production method thereof

Abstract

This invention discloses a multi-purpose continuous rotary kiln device for negative electrodes and a method for producing negative electrode materials, comprising: a low-temperature zone for melting and softening materials; a pre-carbonization zone for pre-carbonizing the softened materials; a vapor-phase coating zone for vapor-phase coating the pre-carbonized materials; a cooling zone for cooling the vapor-phase coated materials; a product material collection zone for collecting the cooled materials; and a tail gas treatment and recovery zone for treating and / or reusing the tail gas generated during the production process of the continuous rotary kiln device. This invention enables more efficient and controllable temperature control and tar treatment in different heating zones, achieving optimized negative electrode material production.

Description

Technical Field

[0001] This invention relates to equipment specifically for negative electrodes, and more specifically, to a multi-purpose continuous rotary kiln apparatus for negative electrodes and a method for producing negative electrode materials therefrom. Background Technology

[0002] With the rapid development of electric vehicles and renewable energy, lithium-ion batteries, as the primary electrochemical energy storage device, are increasingly demanding high-performance anode materials. Continuous rotary kilns, as a highly efficient and continuous production process, offer significant advantages and promising applications in anode material production.

[0003] Traditional anode material manufacturing processes typically employ batch production methods, involving multiple steps such as mixing, crushing, molding, and drying. This results in limited production efficiency and significant challenges in process control. In contrast, continuous rotary kilns, through their unique structure and operation, can achieve uniform processing and coating of materials under high-temperature conditions, thereby improving production efficiency and optimizing material structure and performance. Therefore, the application of continuous rotary kilns in anode material production not only helps improve battery performance and energy density but also promotes the development of electric vehicles and energy storage systems, fostering the widespread application of clean energy and sustainable development.

[0004] Traditional rotary kilns suffer from low thermal efficiency and low exhaust gas utilization when processing materials such as asphalt. Furthermore, each processing stage is independent, resulting in high energy consumption and hindering energy conservation and emission reduction.

[0005] Existing patent applications, such as Chinese Patent Application No. 202221675584.9, disclose a two-stage coal catalytic pyrolysis rotary kiln device, including a feeding mechanism, a first-stage pyrolysis mechanism, and a second-stage pyrolysis mechanism connected in sequence. This device achieves separate collection of light oil and heavy oil, realizes continuous low-temperature catalytic pyrolysis reaction, and improves production capacity, but does not mention tail gas recovery. Another example is Chinese Patent Application No. 202321467770.8, which discloses a rotary kiln device for silicon-based battery material CVD process. This rotary kiln device can solve problems such as severe carbon buildup, furnace mouth gelling, low output rate, and powder loss in traditional CVD devices, but still does not mention tail gas treatment.

[0006] Therefore, developing a rotary kiln capable of integrating multiple processing functions and improving thermal energy utilization efficiency has become an urgent problem to be solved. Secondly, existing chemical vapor deposition (CVD) technology is widely used in the preparation of anode materials; however, existing devices have certain limitations in terms of temperature and gas flow uniformity during the coating process and post-processing efficiency. In existing technologies, the rotary kiln plays a crucial role in the production of anode materials, but its temperature control in the high-temperature region is not precise enough, resulting in low tar processing efficiency and low natural gas utilization in the tail gas treatment unit, leading to resource waste. Therefore, more efficient and controllable devices are needed to achieve optimized anode material production. Summary of the Invention

[0007] In view of the deficiencies in the existing technology, the purpose of this invention is to provide a multi-purpose continuous rotary furnace device for negative electrodes and a method for producing negative electrode materials, which can achieve more efficient and controllable temperature control and tar treatment for different heating demand areas to achieve optimized negative electrode material production.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] The first aspect of this invention provides a multi-purpose continuous rotary kiln apparatus for the negative electrode, comprising:

[0010] The low-temperature zone is used for melting and softening materials;

[0011] The pre-carbonization zone is used to pre-carbonize the molten and softened material.

[0012] The vapor-phase coating zone is formed by vapor-phase coating on the material after pre-carbonization treatment;

[0013] The cooling zone is used to cool and lower the temperature of the material after the vapor phase coating is completed.

[0014] The product material collection area is used to collect the material after it has been cooled down.

[0015] The exhaust gas treatment and recovery area is used to treat and / or reuse the exhaust gas generated during the production process of the continuous rotary kiln device.

[0016] Preferably, the discharge side of the low-temperature zone, the pre-carbonization zone, the vapor phase coating zone, and the cooling zone are all equipped with one-way valves.

[0017] Preferably, the one-way valve is a spring-loaded online one-way valve, a spring-loaded Y-type one-way valve, a ball one-way valve, a diaphragm one-way valve, a lift one-way valve, a swing one-way valve, a shut-off one-way valve, a butterfly one-way valve, a wafer one-way valve, or a duckbill one-way valve.

[0018] Preferably, the feed sides of the low-temperature zone, the vapor phase coating zone, and the cooling zone are all equipped with screw feeders or automatic feed boxes;

[0019] The gas phase coating region is also connected to a carbon source gas inlet.

[0020] Preferably, a discharge hopper is provided between the discharge side of the pre-carbonization zone and the feed side of the gas phase coating zone, and between the discharge side of the gas phase coating zone and the feed side of the cooling zone.

[0021] Preferably, the product material collection area includes a star-shaped feeder connected to the one-way valve of the cooling area, and a hopper connected to the star-shaped feeder.

[0022] Preferably, the exhaust gas treatment and recovery area includes:

[0023] A heat recovery system is used to re-burn and heat the recovered exhaust gas and supply the heat energy to the gas phase encapsulation zone;

[0024] A gas purification system is used to filter out unused carbon source gas and introduce it into the gas phase coating zone through a recovery gas pipeline.

[0025] Preferably, the recovered gas pipeline is equipped with a gas valve.

[0026] Preferably, heating mechanisms are provided on the exterior of the low-temperature zone, the pre-carbonization zone, and the vapor-phase coating zone;

[0027] The heating mechanism uses electric heating, heating rods, or fuel heating.

[0028] Preferably, a heat exchange mechanism is provided outside the cooling zone;

[0029] The heat exchange mechanism adopts one or more of the following: liquid cooling, air cooling, steam compression refrigeration, steam absorption refrigeration, steam jet refrigeration, magnetocooling, and acoustic refrigeration.

[0030] A second aspect of the present invention provides a method for producing negative electrode materials based on the continuous rotary kiln apparatus provided in the first aspect of the present invention, comprising the following steps:

[0031] S1, coal tar pitch and graphite materials are fed into the low-temperature zone through a screw feeder or an automatic feed box. The low-temperature zone is heated to melt and soften the materials, making them easier to granulate later.

[0032] S2, the material enters the pre-carbonization zone through the one-way valve. The pre-carbonization zone is heated to accelerate the carbonization process of the material and perform pre-carbonization treatment. The pre-carbonized material enters the storage silo through the one-way valve and is deagglomerated and dispersed by the deagglomeration device in the storage silo.

[0033] S3, the dispersed material enters the gas phase coating zone through a screw feeder or automatic feed box. The gas phase coating zone is heated and carbon atoms generated by the cracking of carbon source gas are introduced to form a coating layer on the surface of the material. The gas phase coated material enters the storage silo through a one-way valve.

[0034] S4, the gas-coated material in the storage bin is then fed into the cooling zone for cooling via a screw feeder or an automatic feeder box;

[0035] S5, the cooled material enters the hopper through the star feeder. When the hopper is full, the star feeder is controlled to achieve discharge without leakage of carbon source gas.

[0036] S6, the exhaust gas generated by the continuous rotary kiln device enters the exhaust gas treatment and recovery area for treatment.

[0037] The present invention provides a multi-purpose continuous rotary kiln device for negative electrodes and a method for producing negative electrode materials. Through integrated design, it not only realizes continuous and efficient material handling, but also significantly improves energy utilization efficiency and reduces energy loss and environmental pollution in the production process, thus having significant economic and environmental benefits.

[0038] By designing five main functional zones (low temperature zone, high temperature zone, gas phase coating zone, cooling zone, and exhaust gas treatment and recovery zone), continuous, efficient, and environmentally friendly material handling is achieved.

[0039] In the high-temperature zone, innovative improvements were made to temperature control, employing advanced temperature control technology to ensure temperature stability during the production process and optimize the heat treatment effect of the negative electrode material. Simultaneously, advancements in tar treatment technology significantly improved the efficiency of tar generation and recovery, reducing environmental pollution.

[0040] The optimized exhaust gas treatment and recovery area effectively recovers useful components from exhaust gases for reuse, significantly improving natural gas utilization. These improvements not only increase production efficiency and reduce energy consumption but also promote resource recycling, aligning with sustainable development requirements.

[0041] In summary, the continuous rotary kiln device of the present invention has significant effects on improving production efficiency, reducing environmental impact and recycling resources, and provides a more optimized solution for the production of anode materials. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structural framework of the continuous rotary kiln device of the present invention. Detailed Implementation

[0043] To better understand the above-mentioned technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0044] Combination Figure 1 As shown, the present invention provides a multi-purpose continuous rotary kiln device for the negative electrode, which is divided into several main functional areas, namely: a low-temperature zone, a pre-carbonization zone, a vapor phase coating zone, a cooling zone, a product material collection zone, and a tail gas treatment and recovery zone, aiming to achieve continuous, efficient, and environmentally friendly material processing. Specifically, it includes:

[0045] Low-temperature zone 1 is used for melting and softening materials (such as asphalt) to facilitate subsequent granulation. Precise temperature control ensures that the material softens sufficiently at the appropriate temperature without decomposition.

[0046] Pre-carbonization zone 2 is used to pre-carbonize the molten and softened material. The high-temperature environment accelerates the carbonization process and improves the carbonization efficiency. The temperature in this zone is adjustable to accommodate the carbonization requirements of different materials.

[0047] In the gas phase coating zone 3, gas phase coating is performed on the material after pre-carbonization treatment. Carbon atoms generated by the cracking of carbon source gas (natural gas, acetylene, ethylene, propane, etc.) form a uniform coating layer on the sample surface, which enhances the rate performance and other properties of the product.

[0048] Cooling zone 4 is used to cool down the material after the gas phase coating is completed, ensuring that the material is processed at a safe temperature and avoiding possible thermal damage in subsequent operations.

[0049] Product material collection area 5 is used to collect materials after cooling and temperature reduction.

[0050] The exhaust gas treatment and recovery area 6 is used to treat and / or reuse the exhaust gas generated during the production process of the continuous rotary kiln device of the present invention.

[0051] The feed side 101 of the low-temperature zone 1 adopts a screw feeder or an automatic feed box.

[0052] A heating mechanism 102 is installed outside the low-temperature zone 1. The heating mechanism 102 uses electric heating, heating rod or fuel heating, and the heat preservation range is 100℃~300℃.

[0053] A one-way valve 7 is installed on the discharge side of the low-temperature zone 1.

[0054] A heating mechanism 201 is installed outside the pre-carbonization zone 2. The heating mechanism 201 uses electric heating, heating rod or fuel heating, and the heat preservation range is 500℃~700℃.

[0055] A one-way valve 8 is installed on the discharge side of the pre-carbonization zone 2.

[0056] A storage silo 9 is provided between the discharge side of the pre-carbonization zone 2 and the feed side of the gas phase coating zone 3. A small depolymerization device or a spiral mixer is installed in the storage silo 9.

[0057] The feed side 301 of the vapor phase coating zone 3 adopts a screw feeder or an automatic feed box.

[0058] A heating mechanism 302 is installed outside the gas phase coating zone 3. The heating mechanism 302 adopts electric heating, heating rod or fuel heating, and the heat preservation range is 750℃~1050℃.

[0059] The gas phase coating zone 3 is also connected to a carbon source gas inlet 10, which is equipped with a carbon source gas flow meter to ensure the uniformity and efficiency of the coating process.

[0060] A one-way valve 11 is installed on the discharge side of the gas phase coating zone 3.

[0061] A storage bin 12 is provided between the discharge side of the vapor phase coating zone 3 and the feed side 401 of the cooling zone 4.

[0062] The feed side 401 of cooling zone 4 adopts a screw feeder or an automatic feed box.

[0063] A heat exchange mechanism 402 is installed outside the cooling zone 4. The heat exchange mechanism 402 adopts one or more of the following: liquid cooling, air cooling, steam compression refrigeration, steam absorption refrigeration, steam jet refrigeration, magnetocooling, and acoustic refrigeration.

[0064] A one-way valve 13 is installed on the discharge side of cooling zone 4.

[0065] Check valves 7, 8, 11, and 13 all employ spring-loaded online check valves, spring-loaded Y-type check valves, ball check valves, diaphragm check valves, lift check valves, swing check valves, shut-off check valves, butterfly check valves, wafer check valves, or duckbill check valves.

[0066] Product material collection area 5 includes a star feeder 501 connected to the one-way valve 13 of cooling area 4, and a hopper 502 connected to the star feeder 501.

[0067] After cooling, the product material will enter the hopper 502 (or bag) through the star feeder 501. When the hopper 502 (or bag) is full, the material can be discharged without leakage of carbon source gas by controlling the star feeder 501.

[0068] Exhaust gas treatment and recovery area 6 includes:

[0069] A heat recovery system is used to re-burn and heat the recovered exhaust gas and supply the heat energy to the gas phase encapsulation zone 3;

[0070] The gas purification system is used to filter unused carbon source gas. After opening the gas valve 601, the gas is introduced into the gas phase coating zone 3 through the recovery gas pipeline 602.

[0071] This process improves the utilization rate of carbon-based gases such as natural gas, reduces energy waste, and lowers environmental pollution.

[0072] The present invention also provides a method for producing negative electrode materials based on the continuous rotary kiln device of the present invention, comprising the following steps:

[0073] S1, coal tar pitch and graphite materials are fed into low temperature zone 1 through a screw feeder or automatic feed box. Low temperature zone 1 is heated to melt and soften the materials, which is convenient for subsequent granulation.

[0074] S2, the material enters the pre-carbonization zone 2 through the one-way valve 7. The pre-carbonization zone 2 is heated to accelerate the carbonization process of the material and carry out pre-carbonization treatment. The pre-carbonized material enters the storage silo 9 through the one-way valve 8. The pre-carbonized material is deagglomerated and dispersed by the deagglomeration device in the storage silo 9.

[0075] S3, the dispersed material enters the gas phase coating zone 3 through a screw feeder or automatic feed box. The gas phase coating zone 3 is heated and carbon atoms generated by the cracking of carbon source gas are introduced to form a coating layer on the surface of the material. The gas phase coated material enters the storage silo 12 through the one-way valve 11.

[0076] S4, the gas-phase coated material in the storage bin 12 is then fed into the cooling zone 4 for cooling via a screw feeder or automatic feeder box;

[0077] S5, the cooled material enters the hopper 502 through the star feeder 501. When the hopper 502 is full, the star feeder 501 is controlled to achieve material discharge without leakage of carbon source gas.

[0078] S6, the exhaust gas generated by the continuous rotary kiln device enters the exhaust gas treatment and recovery zone 6 for treatment.

[0079] In summary, this invention divides the continuous rotary kiln device into several main functional zones, namely: a low-temperature zone, a pre-carbonization zone, a vapor-phase coating zone, a cooling zone, a product material collection zone, and a tail gas treatment and recovery zone. The aim is to achieve continuous, efficient, and environmentally friendly material processing. In particular, innovative improvements have been made to temperature control and tar treatment in different zones, and the tail gas treatment device has been optimized to improve natural gas utilization, achieve resource recycling, and enhance production efficiency.

[0080] Example 1

[0081] This embodiment 1 provides a multi-purpose continuous rotary kiln device for negative electrodes and a method for producing negative electrode materials, specifically including:

[0082] S1, coal tar pitch and graphite materials are fed into the low-temperature zone 1 of the rotary kiln via a screw feeder. The low-temperature zone 1 is electrically heated to 200°C, melting and softening the materials to facilitate subsequent granulation. Precise temperature control ensures that the materials are fully softened at a suitable temperature without decomposition.

[0083] S2, the material enters the pre-carbonization zone 2 through a ball-type check valve for pre-carbonization of the intermediate product. In this zone, the material is heated to 600℃ via electric heating to accelerate the carbonization process and improve the carbonization efficiency. After pre-carbonization, the material passes through the ball-type check valve again and enters the storage silo 9, where a small deagglomeration device breaks up the pre-carbonized lumps.

[0084] S3, the dispersed material enters the vapor phase coating zone 3 through the automatic feed box, where the pre-carbonized sample is vapor-coated. This zone is heated to 900℃ by fuel heating, and carbon atoms generated from ethylene cracking are introduced to form a uniform coating layer on the sample surface, enhancing the rate performance and other properties of the product. After vapor phase coating, the material enters the storage silo 12 after passing through a ball-type check valve.

[0085] S4, the vapor-phase coated material in the storage bin 12 enters the cooling zone 4 through the screw feeder for cooling. The circulating water system is turned on and the cooling water temperature is set to 25°C to ensure that the material is processed at a safe temperature and to avoid possible thermal damage in subsequent operations.

[0086] S5, the cooled product material will enter the hopper 502 through the star feeder 501. When the hopper 502 is full, the discharge without leakage of carbon source gas can be achieved by controlling the star feeder 501.

[0087] S6, the exhaust gas generated in the furnace enters the subsequent exhaust gas treatment and recovery zone 6. This zone switches to heat recovery system mode, re-burning and heating the recovered exhaust gas to supply the heat energy back to the gas phase coating zone 3. This process improves the utilization rate of ethylene gas, reduces energy waste, and reduces environmental pollution.

[0088] Example 2

[0089] This embodiment 2 provides a multi-purpose continuous rotary kiln device for negative electrodes and a method for producing negative electrode materials, specifically including:

[0090] S1, petroleum asphalt and graphite materials are fed into the low-temperature zone 1 of the rotary kiln via an automatic feed box. The low-temperature zone 1 is heated to 220°C by heating rods, melting and softening the materials to facilitate subsequent granulation. Precise temperature control ensures that the materials are fully softened at a suitable temperature without decomposition.

[0091] S2, the material enters the pre-carbonization zone 2 through a spring-loaded Y-type check valve for pre-carbonization of the intermediate product. In this zone, the material is heated to 650℃ by heating rods to accelerate the carbonization process and improve the carbonization efficiency. After pre-carbonization, the material passes through the spring-loaded Y-type check valve again and enters the storage silo 9, where a spiral mixer further agitates and breaks up the pre-carbonized material.

[0092] S3, the dispersed material enters the vapor phase coating zone 3 through the automatic feed box, where the pre-carbonized sample is vapor-coated. This zone is heated to 950℃ by a heating rod, and carbon atoms generated from propane cracking are introduced to form a uniform coating layer on the sample surface, enhancing the rate performance and other properties of the product. After vapor phase coating, the material enters the storage silo 12 after passing through a spring-loaded Y-type check valve.

[0093] S4, the vapor-phase coated material in storage silo 12 enters cooling zone 4 through screw feeder for air cooling, and the air-cooled heat pump is turned on to ensure that the material is processed at a safe temperature to avoid possible thermal damage in subsequent operations.

[0094] S5, the cooled product material will enter the hopper 502 through the star feeder 501. When the hopper 502 is full, the discharge without leakage of carbon source gas can be achieved by controlling the star feeder 501.

[0095] S6, the exhaust gas generated in the furnace enters the subsequent exhaust gas treatment and recovery zone 6. This zone switches to a gas purification system to filter the unused propane gas. After opening the gas valve 601, the gas is reintroduced into the gas phase coating zone 3 through the gas pipeline 602 for coating and utilization. This process improves the utilization rate of propane gas, reduces energy waste, and also reduces environmental pollution.

[0096] Example 3

[0097] This embodiment 3 provides a multi-purpose continuous rotary kiln device for negative electrodes and a method for producing negative electrode materials, specifically including:

[0098] S1, naphthalene pitch and graphite materials are fed into the low-temperature zone 1 of the rotary kiln via a screw feeder. The low-temperature zone 1 is heated to 180°C by fuel heating, melting and softening the materials to facilitate subsequent granulation. Precise temperature control ensures that the materials are fully softened at a suitable temperature without decomposition.

[0099] S2, the material enters the pre-carbonization zone 2 through a swing check valve for pre-carbonization of the intermediate product. In this zone, the material is heated to 700℃ by fuel heating to accelerate the carbonization process and improve the carbonization efficiency. After pre-carbonization, the material passes through the swing check valve again and enters the storage silo 9, where a small deagglomerator breaks up the pre-carbonized lumps.

[0100] S3, the dispersed material enters the vapor phase coating zone 3 via a screw feeder, where the pre-carbonized sample is vapor-coated. This zone is heated to 860℃ by fuel heating, and carbon atoms generated from acetylene cracking are introduced to form a uniform coating layer on the sample surface, enhancing the rate performance and other properties of the product. After vapor phase coating, the material enters the storage silo 12 after passing through a swing check valve.

[0101] S4, the vapor-phase coated material in the storage silo 12 enters the cooling zone 4 through the screw feeder for vapor compression refrigeration cooling. The refrigeration compressor is turned on to ensure that the material is processed at a safe temperature and to avoid possible thermal damage in subsequent operations.

[0102] S5, the cooled product material will enter the hopper 502 through the star feeder 501. When the hopper 502 is full, the discharge without acetylene gas leakage can be achieved by controlling the star feeder 501.

[0103] S6, the exhaust gas generated in the furnace enters the subsequent exhaust gas treatment and recovery zone 6. This zone switches to heat recovery system mode, re-burning and heating the recovered acetylene, and supplying the heat energy back to the gas phase coating zone 3. This process improves the utilization rate of acetylene gas, reduces energy waste, and reduces environmental pollution.

[0104] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any variations or modifications to the above embodiments that are within the spirit and essence of the present invention will fall within the scope of the claims of the present invention.

Claims

1. A multi-purpose continuous rotary furnace device for the negative electrode, characterized in that, include: The low-temperature zone is used for melting and softening materials; The pre-carbonization zone is used to pre-carbonize the molten and softened material. The vapor-phase coating zone is formed by vapor-phase coating on the material after pre-carbonization treatment; The cooling zone is used to cool and lower the temperature of the material after the vapor phase coating is completed. The product material collection area is used to collect the material after it has been cooled down. The exhaust gas treatment and recovery area is used to treat and / or reuse the exhaust gas generated during the production process of the continuous rotary kiln device.

2. The multi-purpose continuous rotary furnace device for negative electrode according to claim 1, characterized in that: One-way valves are provided on the discharge side of the low-temperature zone, the pre-carbonization zone, the vapor phase coating zone, and the cooling zone.

3. The multi-purpose continuous rotary furnace device for negative electrode according to claim 2, characterized in that: The one-way valve is a spring-loaded online one-way valve, a spring-loaded Y-type one-way valve, a ball one-way valve, a diaphragm one-way valve, a lift one-way valve, a swing one-way valve, a shut-off one-way valve, a butterfly one-way valve, a wafer one-way valve, or a duckbill one-way valve.

4. The multi-purpose continuous rotary furnace device for negative electrode according to claim 2, characterized in that: The feed sides of the low-temperature zone, the vapor phase coating zone, and the cooling zone all use screw feeders or automatic feed boxes; The gas phase coating region is also connected to a carbon source gas inlet.

5. The multi-purpose continuous rotary furnace device for negative electrode according to claim 4, characterized in that: A discharge hopper is provided between the discharge side of the pre-carbonization zone and the feed side of the vapor phase coating zone, and between the discharge side of the vapor phase coating zone and the feed side of the cooling zone.

6. The multi-purpose continuous rotary furnace device for negative electrode according to claim 4, characterized in that: The product material collection area includes a star-shaped feeder connected to the one-way valve of the cooling area, and a hopper connected to the star-shaped feeder.

7. The multi-purpose continuous rotary furnace device for negative electrode according to claim 4, characterized in that, The exhaust gas treatment and recovery area includes: A heat recovery system is used to re-burn and heat the recovered exhaust gas and supply the heat energy to the gas phase encapsulation zone; A gas purification system is used to filter out unused carbon source gas and introduce it into the gas phase coating zone through a recovery gas pipeline.

8. The multi-purpose continuous rotary furnace device for negative electrode according to claim 7, characterized in that: The recovered gas pipeline is equipped with a gas valve.

9. The multi-purpose continuous rotary furnace device for negative electrode according to claim 1, characterized in that: Heating mechanisms are provided on the exterior of the low-temperature zone, the pre-carbonization zone, and the vapor-phase coating zone; The heating mechanism uses electric heating, heating rods, or fuel heating.

10. The multi-purpose continuous rotary furnace device for negative electrode according to claim 1, characterized in that: A heat exchange mechanism is provided on the outside of the cooling zone; The heat exchange mechanism adopts one or more of the following: liquid cooling, air cooling, steam compression refrigeration, steam absorption refrigeration, steam jet refrigeration, magnetocooling, and acoustic refrigeration.

11. A method for producing negative electrode material based on the continuous rotary kiln apparatus according to any one of claims 1-10, characterized in that, Includes the following steps: S1, coal tar pitch and graphite materials are fed into the low-temperature zone through a screw feeder or an automatic feed box. The low-temperature zone is heated to melt and soften the materials, making them easier to granulate later. S2, the material enters the pre-carbonization zone through the one-way valve. The pre-carbonization zone is heated to accelerate the carbonization process of the material and perform pre-carbonization treatment. The pre-carbonized material enters the storage silo through the one-way valve and is deagglomerated and dispersed by the deagglomeration device in the storage silo. S3, the dispersed material enters the gas phase coating zone through a screw feeder or automatic feed box. The gas phase coating zone is heated and carbon atoms generated by the cracking of carbon source gas are introduced to form a coating layer on the surface of the material. The gas phase coated material enters the storage silo through a one-way valve. S4, the gas-coated material in the storage bin is then fed into the cooling zone for cooling via a screw feeder or an automatic feeder box; S5, the cooled material enters the silo through the star feeder. When the silo is full, the star feeder is controlled to achieve discharge without leakage of carbon source gas. S6, the exhaust gas generated by the continuous rotary kiln device enters the exhaust gas treatment and recovery area for treatment.

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