Graphite reaction furnace

Abstract

The utility model provides a graphite reaction furnace which comprises a furnace main body, and the furnace main body comprises a first heating section, a second heating section, a reaction section and a cooling section, the preheating furnace is arranged at the upstream position of the kiln main body and communicates with the first heating section; the transportation part is used for placing raw materials, and the transportation part is movably arranged in the kiln main body and the preheating furnace; and the driving part is in driving connection with the conveying part. The problem that equipment in the prior art cannot achieve continuous production is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of graphite processing, specifically, relate to a graphite reaction furnace. BACKGROUND

[0002] Graphite is a commonly used material as the negative electrode material of lithium ion battery, and has a wide application in the commercial field, mainly two categories of artificial graphite and natural graphite. Among them, artificial graphite is the most commonly used negative electrode material in the commercial lithium ion battery production in our country, has the advantages of stable performance, high specific capacity, good cycle performance, but the manufacturing cost is higher. Compared with artificial graphite, natural graphite has high charge and discharge capacity, low price, and the reserves of natural graphite in our country are very rich, but the problems of many surface defects, poor compatibility with electrolyte and poor cycle performance limit its application.

[0003] At present, in order to improve these defects of natural graphite, the modification process is generally adopted. Among them, the common method is to fill the mixture of natural graphite raw material and pitch into graphite box, put it into the roller kiln in nitrogen atmosphere, heat to 800-1250 DEG C to realize sintering. In addition, the high temperature kiln of 1800-2400 DEG C used in the current carbon carbon industry is an intermittent horizontal vacuum sintering furnace, which uses inductive heating method to protectively heat the material, and the sintering effect of the material is good, and the product index consistency is good, but due to the intermittent equipment, the whole cycle from material feeding to discharging is long, which makes the material production capacity low and the production cost high. UTILITY MODEL CONTENTS

[0004] The main purpose of the utility model is to provide a graphite reaction furnace, so as to solve the problem that the equipment in the prior art cannot produce continuously.

[0005] In order to achieve the above purpose, according to one aspect of the utility model, a graphite reaction furnace is provided, which comprises a kiln main body, the kiln main body comprises a first heating section, a second heating section, a reaction section and a cooling section; a preheating furnace is arranged at the upstream position of the kiln main body and communicates with the first heating section; a conveying part is used for placing raw materials, and the conveying part is movably arranged in the kiln main body and the preheating furnace; a driving part is drivingly connected with the conveying part.

[0006] Further, the graphite reaction furnace further comprises a waste heat recovery assembly, the waste heat recovery assembly comprises a heat absorption device, the heat absorption device is arranged on the kiln main body, and the heat absorption device absorbs the excess heat of the kiln main body; a heat release device communicates with the heat absorption device, and the heat absorption device is arranged on the preheating furnace to heat the preheating furnace.

[0007] Further, the graphite reaction furnace further comprises a guide rail, the kiln main body and the preheating furnace are provided with guide rails, and the conveying part is slidably arranged on the guide rail.

[0008] Further, the graphite reaction furnace further comprises a gas protection assembly, which is communicated with the kiln body and the preheating furnace to provide a protective gas.

[0009] Further, the gas protection assembly comprises: a pair of gas replacement chambers, wherein one of the gas replacement chambers is communicated with the preheating furnace through the first heating section, and the other of the gas replacement chambers is arranged at the discharging end of the cooling section, and the gas replacement chambers are filled with the protective gas; a first gas pipeline, which provides the protective gas for the first heating section and the second heating section; and a second gas pipeline, which provides the protective gas for the reaction section.

[0010] Further, the protective gas comprises nitrogen and argon, the protective gas in the gas replacement chambers and the first gas pipeline is nitrogen, and the protective gas in the second gas pipeline is argon.

[0011] Further, the kiln body further comprises a gas injection assembly, which is arranged at the feeding end and the discharging end of the reaction section, and the gas injection assembly sprays gas to form a gas curtain.

[0012] Further, the cooling section is provided with a wind cooling device and a water cooling device, the wind cooling device is arranged at one end of the cooling section close to the reaction section, and the wind cooling device comprises a wind cooling pipe; and the water cooling device is arranged at the first end of the cooling section away from the reaction section, and the water cooling device comprises a water cooling pipe.

[0013] Further, the kiln body further comprises a smoke exhaust assembly, which is arranged on the first heating section and the second heating section.

[0014] Further, the transport member comprises a kiln car, and the driving member comprises a push rod system.

[0015] Further, the kiln car comprises: a frame body; a wheel, which is rotationally connected with the frame body; a heat insulation layer, which is arranged on the frame body; and a graphite plate, which is arranged on the heat insulation layer.

[0016] The technical scheme of the present application has the following technical effects:

[0017] In use, the graphite placed in the transport member is driven by the driving member to sequentially pass through the preheating furnace and the first heating section, the second heating section, the reaction section and the cooling section of the kiln body, and in the reaction process, the transport member passes through different positions of the reaction furnace to meet the requirements of each stage of graphite processing. The graphite can meet the processing requirements by moving the driving member only, and thus multiple transport members can be arranged, and when the graphite on one of the transport members has passed through one stage of reaction, the graphite on the subsequent transport member can be timely filled to enable the reaction to be continuously carried out, so that the graphite can be continuously produced. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings accompanying the specification of this application serve to provide further understanding of the present application, the illustrative embodiments of the present application and their descriptions serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 The overall structure of the present application is shown in the schematic diagram;

[0020] Figure 2 The structure of the main body of the kiln of the present application is shown in the schematic diagram;

[0021] Figure 3 The structure of the transport member of the present application is shown in the schematic diagram;

[0022] Figure 4 The structure of the waste heat recovery assembly is shown in the schematic diagram.

[0023] Among them, the above drawings include the following reference signs:

[0024] 10, kiln main body; 11, first temperature rising section; 12, second temperature rising section; 13, reaction section; 14, cooling section; 141, air cooling device; 142, water cooling device; 15, smoke exhaust assembly; 20, preheating furnace; 30, transport member; 31, frame body; 32, wheel; 33, heat insulation layer; 34, graphite plate; 40, waste heat recovery assembly; 41, heat absorption device; 42, heat release device; 411, hot air suction pipe; 412, hot air outlet pipe; 413, driving assembly; 50, guide rail; 60, gas protection assembly; 61, gas replacement chamber; 62, first gas pipeline; 63, second gas pipeline; 70, air injection assembly; 80, driving member. DETAILED DESCRIPTION

[0025] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with embodiments.

[0026] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0027] In the present application, unless otherwise stated, the orientation words such as "up, down, top, bottom" are generally directed to the direction shown in the drawings, or are directed to the vertical, perpendicular or gravity direction of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refers to the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the present application.

[0028] Reference is made to Figures 1 to 3The graphite reaction furnace comprises a kiln main body 10, a preheating furnace 20, a conveying member 30 and a driving member 80. The kiln main body 10 comprises a first temperature rising section 11, a second temperature rising section 12, a reaction section 13 and a cooling section 14. The preheating furnace 20 is arranged at an upstream position of the kiln main body 10 and is in communication with the first temperature rising section 11. The conveying member 30 is used for placing raw materials and is movably arranged in the kiln main body 10 and the preheating furnace 20. The driving member 80 is in driving connection with the conveying member 30.

[0029] In use, the graphite placed in the conveying member 30 is driven by the driving member 80 to sequentially pass through the preheating furnace 20 and the first temperature rising section 11, the second temperature rising section 12, the reaction section 13 and the cooling section 14 of the kiln main body 10. In the reaction process, the conveying member 30 passes through different positions of the reaction furnace to meet the requirements of various stages of graphite processing. The graphite processing requirements can be met by moving the driving member 80. In this way, multiple conveying members 30 can be arranged. When the graphite on one of the conveying members 30 has passed through a stage of reaction, the graphite on the subsequent conveying member 30 can be timely filled to enable continuous reaction and continuous production of the graphite.

[0030] In the present application, the graphite reaction furnace further comprises a waste heat recovery assembly 40. The waste heat recovery assembly 40 comprises a heat absorption device 41 and a heat release device 42. The heat absorption device 41 is arranged on the kiln main body 10 and absorbs excess heat of the kiln main body 10. The heat release device 42 is in communication with the heat absorption device 41 and is arranged on the preheating furnace 20 to heat the preheating furnace 20.

[0031] Specifically, the excess heat of the kiln main body 10 is utilized by the heat absorption assembly, thereby reducing the energy consumption of the entire reaction furnace and reducing the production cost.

[0032] Referring to Figure 4 The waste heat recovery assembly 40 comprises a hot air suction pipe 411, a hot air outlet pipe 412 and a driving assembly 413. One end of the hot air suction pipe 411 is in communication with the kiln main body, and the other end is in communication with the hot air outlet pipe 412. One end of the hot air outlet pipe 412 is in communication with the hot air suction pipe 411, and the other end is in communication with the preheating furnace. The driving assembly 413 is arranged between the hot air suction pipe 411 and the hot air outlet pipe 412 to provide power for the circulation of air between the hot air suction pipe 411 and the hot air outlet pipe 412. The heat absorption device 41 comprises the hot air suction pipe 411, and the heat release device 42 comprises the hot air outlet pipe 412. The high-temperature gas flow in the kiln main body is transported into the preheating furnace by the driving assembly 413. The waste heat is reused.

[0033] In the present application, the graphite reaction furnace further comprises guide rails 50, the kiln body 10 and the preheating furnace 20 are provided with the guide rails 50, and the conveying member 30 is slidably arranged on the guide rails 50. Specifically, the movement of the conveying member 30 is constrained through the guide rails 50, which can increase the stability of the movement of the conveying member 30.

[0034] In the present application, the graphite reaction furnace further comprises a gas protection assembly 60, which is in communication with the kiln body 10 and the preheating furnace 20 to provide protective gas.

[0035] Specifically, graphite will react with the gas in the air, especially oxygen, at high temperature, which will affect the quality of the final product. Therefore, the gas protection assembly 60 is arranged on the kiln body 10, which provides protective gas to isolate the graphite from the air, avoids the reaction between the gas in the air, especially oxygen, and the graphite, and improves the quality of the product.

[0036] In the present application, the gas protection assembly 60 comprises gas displacement chambers 61, a first gas pipeline 62 and a second gas pipeline 63, the gas displacement chambers 61 are arranged in pairs, one of the gas displacement chambers 61 is arranged at the first heating section 11 and is in communication with the preheating furnace 20, and the other gas displacement chamber 61 is arranged at the discharge end of the cooling section 14, the gas displacement chambers 61 have protective gas therein, the first gas pipeline 62 provides protective gas for the first heating section 11 and the second heating section, and the second gas pipeline 63 provides protective gas for the reaction section 13.

[0037] In the present application, the protective gas comprises nitrogen and argon, the protective gas in the gas displacement chambers 61 and the first gas pipeline 62 is nitrogen, and the protective gas in the second gas pipeline 63 is argon.

[0038] Specifically, the gas displacement chambers 61 are mainly arranged at the two ends of the kiln body 10, and the gas displacement chambers 61 play an isolating role to maintain an inert gas environment in the kiln body 10. The gas displacement chambers 61 are double-door structures, which are filled with nitrogen after being vacuumized to ensure that the materials are not oxidized in an inert gas atmosphere. After the conveying member 30 enters the middle of the double doors, the double doors are closed, the vacuum pump is operated, and after vacuumization is completed, nitrogen is introduced, the inner door is opened, and the conveying assembly enters the kiln body 10 to perform a heating reaction.

[0039] The first heating section 11 is heated by a silicon-carbon rod, the temperature is 300-1200 degrees, the binder forms a soft carbon uniform coating on the surface of the graphite, and nitrogen is input through the first gas pipeline during operation to ensure that the graphite is not oxidized.

[0040] The second heating section 12 is heated by a silicon-molybdenum rod, and the temperature is 1200-1700 degrees. During the operation, nitrogen is input through the first gas input pipe, so that the graphite is in the atmosphere of nitrogen to ensure that the graphite is not oxidized.

[0041] The reaction section 13 is heated by a high-purity graphite rod, and the temperature is 1700-2500 degrees. During the operation, the second gas input pipe 63 continuously inputs argon, so that the reaction section 13 is in an argon atmosphere to ensure that the material is not oxidized. The argon protection of the reaction section 13 is because the argon is more stable at high temperature of 1700-2500 degrees.

[0042] In the present application, the kiln body 10 further comprises a gas injection assembly 70, which is arranged at the feeding end and the discharging end of the reaction section 13. The gas injection assembly 70 sprays gas to form a gas curtain.

[0043] Specifically, the reaction section 13 is sprayed by the gas injection assembly 70 to form an argon gas curtain wall. The sprayed argon forms a layer of gas curtain as a barrier to prevent the nitrogen or flue gas of the heating section and the cooling section 14 from entering the reaction section 13 and reacting with the graphite rod to affect the service life of the graphite rod, while ensuring the stability of the atmosphere in the reaction section 13.

[0044] In the present application, the cooling section 14 has a forced air cooling device 141 and a water cooling device 142. The forced air cooling device 141 is located at one end of the cooling section 14 close to the reaction section 13, and the forced air cooling device 141 comprises a forced air cooling pipe. The water cooling device 142 is located at the first end of the cooling section 14 away from the reaction section 13, and the water cooling device 142 comprises a water cooling pipe.

[0045] Specifically, the front section is rapidly cooled by spraying argon at room temperature through the argon pipe connected to the kiln body. The rear section is slowly cooled by circulating water through the discarding water cooling pipe in the kiln wall. The structure of the front section and the rear section can quickly and effectively cool the material. After cooling, the temperature of the material is less than 150 degrees.

[0046] After cooling, the gas replacement in the discharging end of the kiln body 10 is further cooled until the temperature is room temperature.

[0047] In the present application, the kiln body 10 further comprises a smoke exhaust assembly 15, which is arranged on the first heating section 11 and the second heating section 12.

[0048] Specifically, during the heating process of the first heating section 11, a large amount of volatile flue gas is generated from the graphite material, which affects the reaction in the kiln body 10. Therefore, the smoke exhaust assembly 15 is used to discharge the flue gas generated during the reaction to reduce the influence caused by the flue gas.

[0049] In the present application, the conveying member 30 comprises a kiln car; the driving member 80 comprises a push rod system. The kiln car comprises a frame body 31; a wheel 32 rotationally connected with the frame body 31; a heat insulation layer 33 arranged on the frame body 31; a graphite plate 34 arranged on the heat insulation layer 33.

[0050] Specifically, the kiln car adopts the graphite plate 34 made of high-temperature resistant graphite material, and the wheel 32 is a high-temperature resistant vacuum bearing, which ensures the stable and smooth running of the kiln car on the guide rail 50 without jamming or deviation. The kiln car has a heat insulation layer 33 made of refractory bricks at the bottom to prevent heat loss. Graphite baffles are installed at the front and rear ends of the kiln car to further ensure the uniformity of the temperature of the materials at various positions in the kiln car during the heating process.

[0051] The kiln car is pushed into the kiln door by the push rod system, which uses an electric push rod to push / pull the kiln car to realize the material conveying of the entire kiln, and is equipped with a position detection. The push rod system is an electric push rod.

[0052] In the best embodiment: the kiln head of the kiln body 10 is provided with an inlet, and the kiln tail is provided with an outlet. The push rod system is distributed at the kiln head and the kiln tail. The outer side of the kiln body is provided with a heat preservation layer. The kiln car passes through the preheating furnace 20, the first temperature rising section 11, the second temperature rising section 12, the reaction section 13 and the cooling section 14 in sequence in the direction of advancing.

[0053] The preheating furnace 20 has no gas protection, and the first temperature rising section 11, the second temperature rising section 12, the reaction section 13 and the cooling section 14 are all provided with gas protection. The gas protection consists of three parts: first, the gas replacement chamber 61 of the front section of the kiln, which is located between the preheating furnace 20 and the temperature rising section and the discharge end of the cooling section 14. The air in the replacement chamber is pumped into vacuum and then nitrogen is introduced; second, nitrogen gas pipelines are distributed on the first temperature rising section 11, the second temperature rising section 12 and the cooling section 14. Nitrogen is continuously introduced during operation to maintain a slight positive pressure in the furnace to prevent oxygen from escaping; third, argon gas pipelines are distributed on the reaction section 13. Argon is continuously introduced during operation to maintain a slight positive pressure in the furnace to prevent oxygen from escaping. The reaction section 13 is provided with argon gas curtain walls at the front and rear ends, which form two argon gas curtains to prevent nitrogen or flue gas from the temperature rising section (the first temperature rising section 11 and the second temperature rising section 12) and the cooling section 14 from entering the reaction section 13, affecting the argon atmosphere of the reaction section 13. The combination of the three ensures that the materials in the kiln are not affected by air, ensuring stable product quality.

[0054] The preheating section recycles and reuses the waste heat generated by the heating section (first heating section 11 and second heating section 12) and reaction section 13, and the temperature reaches 150-300 DEG C, so that the moisture of the material can be fully discharged, and the binder can be fully softened and melted to infiltrate the surface of the material. The first heating section 11 uses a silicon-carbon rod as an electric heating element. After being powered on, the element generates heat due to the passage of current, and the generated heat is dissipated, achieving a heating effect. The temperature of the first heating section 11 is 300-1200 DEG C, so that the binder forms a soft carbon uniformly coated on the surface of the material; the second heating section 12 uses a silicon-molybdenum rod as an electric heating element. After being powered on, the element generates heat due to the passage of current, and the generated heat is dissipated, achieving a heating effect. The temperature of the second heating section 12 is 1200-1700 DEG C, so that the impurities in the material are further discharged. A large amount of flue gas is discharged during the heating process, so the first heating section 11 and the second heating section 12 are provided with a flue gas treatment device. An argon gas curtain is arranged before and after the high-temperature section. Argon gas is injected through the top of the kiln to form a gas barrier, preventing nitrogen or flue gas in the heating section and the cooling section 14 from entering the high-temperature section and reacting with the graphite conductor to affect the service life of the graphite conductor, while ensuring the stability of the atmosphere in the high-temperature section. The high-temperature section uses a graphite rod as an electric heating element. After being powered on, the element generates heat due to the passage of current, and the generated heat is dissipated, achieving a heating effect. The temperature of the high-temperature section is 1700-2500 DEG C, and the electrochemical performance of the negative electrode graphite product is greatly improved during this process.

[0055] The cooling system adopts a front air cooling and rear water cooling structure. The front air cooling blows nitrogen gas at room temperature into the kiln body through a nitrogen gas pipeline to achieve rapid cooling. The rear water cooling connects the disc-shaped water cooling pipeline in the kiln wall through a circulating water tower to continuously circulate water at room temperature for slow cooling. This two-stage air cooling + water cooling structure has obvious cooling effect on materials treated at >2000 DEG C, and can quickly reduce the temperature of the materials from >2000 DEG C to <150 DEG C.

[0056] Compared with the traditional nitrogen protection, the high-temperature argon protection of the present application is more stable at a high temperature of 1700-2500 DEG C, and the argon gas curtain arranged before and after the high-temperature section is beneficial to the stability of the atmosphere in the high-temperature section and the extension of the service life of the heating element.

[0057] Compared with the conventional kiln, the present application recycles and reuses the waste heat of the heating section and the high-temperature section for preheating, which reduces the production cost. Compared with the conventional kiln car, the graphite baffle is installed before and after the kiln car, which is beneficial to the uniform distribution of the temperature in the kiln car and is not affected by the atmosphere before and after the kiln car.

[0058] Compared with the conventional cooling method, the present application adopts a front air cooling and rear water cooling structure. This two-stage air cooling + water cooling structure has obvious cooling effect on materials treated at >2000 DEG C, and improves the production efficiency.

[0059] Compared with the intermittent high-temperature equipment at the same temperature, the equipment is a continuous equipment, and the production efficiency is improved. Compared with the conventional roller kiln furnace, the heat treatment temperature of the equipment is increased by about 1000 DEG C, the electrochemical performance of the graphite negative electrode is improved, the soft carbon coating layer structure of the graphite is rearranged into near graphitized carbon structure, compared with the end face defect caused by not using pitch coating and the soft carbon structure of pitch coating, the near graphitized carbon structure is more inert to the electrolyte, the surface side reaction is less, the uniformity and density of the generated SEI film are better, so that the initial efficiency is better. In the battery charging and discharging process, the SEI film thickness growth rate is lower, the internal resistance growth is smaller, and the capacity retention performance is better.

[0060] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects:

[0061] 1、In use, the graphite placed in the conveying member 30 is driven by the driving member 80 to pass through the preheating furnace 20 and the first temperature rising section 11, the second temperature rising section 12, the reaction section 13 and the cooling section 14 of the kiln body 10 in turn, in the reaction process, the conveying member 30 passes through different positions of the reaction furnace, meeting the needs of each stage of graphite processing. Only by moving the driving member 80 can the graphite processing needs be met, so that multiple conveying members 30 can be arranged, when the graphite on one of the conveying members 30 passes through a stage of reaction, the graphite on the subsequent conveying member 30 can be timely filled, so that the reaction can be continuously carried out, and the graphite can be continuously produced.

[0062] 2、The excess heat of the kiln body 10 is utilized by the heat absorbing assembly, so that the energy consumption of the whole reaction furnace can be reduced, and the production cost can be reduced.

[0063] 3、The gas replacement chamber 61 is mainly arranged at the two ends of the kiln body 10, the gas replacement chamber 61 plays a role of isolation, so that the inert gas environment in the kiln body 10 can be maintained all the time. The gas replacement chamber 61 is a double-door structure, and adopts the mode of vacuumizing and then filling nitrogen, so that the material can be prevented from being oxidized in the inert gas atmosphere.

[0064] 4、The front-stage air cooling is carried out by injecting normal-temperature argon into the argon pipeline connected with the kiln body, and the rear-stage water cooling is carried out by connecting the disc-shaped water cooling pipeline in the kiln wall with the circulating water tower, so that the material can be rapidly and effectively cooled by the front-stage air cooling and the rear-stage water cooling, and the temperature of the cooled material is less than 150 DEG C.

[0065] Obviously, the above-described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the utility model.

[0066] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments consistent with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0067] It should be noted that the terms "first", "second", and the like, herein do not necessarily have an either chronological or spatial relation. Rather, these terms can be used solely to distinguish a certain specific entity from another entity. It should be understood that the terms so used in the description are interchangeable under appropriate circumstances. It is accordingly to be understood that various modifications and changes can be devised by those skilled in the art without departing from the spirit and the scope of the application.

[0068] The preferred embodiments of the present application have been described above with the specific embodiments. The application can variously be changed and modified without departing from the scope of the application. Accordingly, any and all modifications, variations or equivalent arrangements which do not depart from the scope of the application should be considered equitable to the scope of the application.

Claims

1. A graphite reaction furnace characterized by comprising: The graphite reaction furnace comprises: a kiln body (10) comprising a first heating section (11), a second heating section (12), a reaction section (13) and a cooling section (14); a preheating furnace (20) in communication with the first heating section (11); a conveying member (30) for conveying raw materials, and the conveying member (30) is movably arranged in the kiln body (10) and the preheating furnace (20); a driving member (80) in driving connection with the conveying member (30).

2. The graphite reaction furnace according to claim 1, characterized by The graphite reaction furnace further comprises a waste heat recovery assembly (40), which comprises: a heat absorption device (41) arranged on the kiln body (10) and absorbing excess heat of the kiln body (10); a heat release device (42) in communication with the heat absorption device (41) and arranged on the preheating furnace (20) to heat the preheating furnace (20).

3. The graphite reaction furnace according to claim 1, characterized by The kiln body (10) and the preheating furnace (20) are both provided with guide rails (50), and the conveying member (30) is slidably arranged on the guide rails (50).

4. The graphite reaction furnace according to claim 1, characterized by The graphite reaction furnace further comprises a gas protection assembly (60) in communication with the kiln body (10) and the preheating furnace (20) to provide a protective gas.

5. The graphite reaction furnace according to claim 4, characterized by The gas protection assembly (60) comprises: a pair of gas replacement chambers (61), wherein one of the gas replacement chambers (61) is in communication with the first heating section (11), and the other gas replacement chamber (61) is in communication with the cooling section (14), and the gas replacement chambers (61) contain the protective gas; a first gas pipeline (62) for providing the protective gas to the first heating section (11) and the second heating section (12); a second gas pipeline (63) for providing the protective gas to the reaction section (13).

6. The graphite reaction furnace according to claim 5, characterized by The protective gas comprises nitrogen and argon, the protective gas in the gas replacement chambers (61) and the first gas pipeline (62) is nitrogen; the protective gas in the second gas pipeline (63) is argon.

7. The graphite reaction furnace according to claim 1, characterized by The kiln body (10) further comprises a gas injection assembly (70) arranged at the feeding end and the discharging end of the reaction section (13), and the gas injection assembly (70) forms a gas curtain by injecting gas.

8. The graphite reaction furnace according to claim 1, characterized by The cooling section (14) is provided with a air cooling device (141) and a water cooling device (142), the air cooling device (141) is located at one end of the cooling section (14) close to the reaction section (13), and the air cooling device (141) comprises an air cooling pipe; the water cooling device (142) is located at a first end of the cooling section (14) away from the reaction section (13), and the water cooling device (142) comprises a water cooling pipe.

9. The graphite reaction furnace according to claim 1, characterized by The kiln body (10) further comprises a smoke exhaust assembly (15) arranged on the first temperature rising section (11) and the second temperature rising section (12).

10. The graphite reaction furnace according to any one of claims 1 to 9, characterized by The conveying member (30) comprises a kiln car; and the driving member (80) comprises a push rod system.

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