Graphite electrode cooling device of graphitization furnace, graphitization furnace and cooling method

Abstract

The invention discloses a graphite electrode cooling device of a graphitization furnace, the graphitization furnace and a cooling method, and relates to the technical field of graphite electrode cooling, the graphite electrode cooling device of the graphitization furnace comprises a cooling mechanism, the cooling mechanism comprises an adhesion layer and a plate type heat pipe, an adhesion layer is arranged on the surface of the graphite electrode exposed outside the graphitization furnace, the plate type heat pipe is arranged on one side, far away from the surface of the graphite electrode, of the adhesion layer, the plate type heat pipe comprises a sealing shell, a medium cavity is formed in the sealing shell, a capillary core layer is arranged on the inner wall of the medium cavity, and a cooling medium is stored in the medium cavity; according to the graphite electrode cooling device of the graphitization furnace, the plate type heat pipe is attached to the surface of the exposed graphite electrode, circulating water cooling is not needed, phase change heat transfer of a cooling medium is utilized, the heat dissipation efficiency is improved, phase change heat transfer is not conducted under the low-temperature condition, and invalid heat exchange is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of graphite electrode cooling, and in particular relates to a graphite electrode cooling device of a graphitization furnace, a graphitization furnace and a cooling method. Background Art

[0002] Graphitization furnace is an industrial equipment used to convert carbonaceous materials into graphite. It is widely used in graphite production, preparation of lithium-ion battery negative electrode materials and other fields.

[0003] There are graphite electrodes at the furnace head and furnace tail of the graphitization furnace. Since the graphite electrodes continue to heat up after being energized, the exposed parts of the graphite electrodes outside the furnace are very susceptible to oxidation at high temperatures. Therefore, the graphite electrodes need to be cooled during the preparation process. The traditional cooling method for graphite electrodes is water cooling. Cooling holes are opened inside the graphite electrodes, and cooling pipes are embedded in the cooling holes. Cooling water circulates through the cooling pipes into the graphite electrodes to remove the heat from the graphite electrodes.

[0004] However, the traditional water cooling method takes a long time to cool down, requires a continuous supply of water, consumes a lot of energy and wastes a lot of water resources. In addition, in the low temperature stage (<100°C), the heat generated by the graphite electrode itself is relatively small, and the temperature of the exposed graphite electrode part outside the furnace body rises slowly. At this time, the heat taken away by the cooling water is not much compared with the heat generated by the electrode, and the effect of reducing the overall temperature of the electrode is limited. The cooling water circulation causes ineffective cooling, which further wastes water resources. Summary of the Invention

[0005] The object of the present invention is to provide a graphite electrode cooling device, a graphitization furnace and a cooling method for a graphitization furnace with a simple structure and reasonable design in order to solve the above problems.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] In a first aspect, the present invention provides a graphite electrode cooling device for a graphitization furnace, comprising a cooling mechanism, wherein the cooling mechanism includes an adhesion layer and a plate-type heat pipe, wherein the surface of the graphite electrode exposed outside the graphitization furnace is provided with an adhesion layer, and the plate-type heat pipe is provided on a side of the adhesion layer away from the surface of the graphite electrode, wherein the plate-type heat pipe includes a sealed shell, a medium cavity is provided inside the sealed shell, and a capillary core layer is provided on the inner wall of the medium cavity, and a cooling medium is stored in the medium cavity.

[0008] As a further optimization solution of the present invention, the cooling medium is a gallium-indium-tin alloy, and the storage space of the cooling medium is in a vacuum state.

[0009] As a further optimization solution of the present invention, the phase change temperature of the cooling medium is 100°C to 120°C.

[0010] As a further optimization solution of the present invention, the mass ratio of gallium, indium and tin in the gallium-indium-tin alloy is 60%-70%: 20%-25%: 10%-15%.

[0011] As a further optimization scheme of the present invention, a plurality of heat dissipation plates are fixedly arranged on the side of the plate heat pipe away from the adhesion layer, and the plurality of heat dissipation plates are arranged in an array along the laying direction of the plate heat pipe. The end of the heat dissipation plate extending to the outside of the plate heat pipe is bent toward the side away from the adhesion layer, wherein a flexible fin is provided on the side of the bent end of the heat dissipation plate.

[0012] As a further optimization scheme of the present invention, the cooling mechanism also includes a fan and a rotation drive assembly, the output end of the rotation drive assembly is connected to the fan transmission, the fan is arranged on the side of the plate heat pipe away from the graphite electrode, and the rotation drive assembly is used to drive the fan to perform coaxial circular motion around the graphite electrode.

[0013] As a further optimization scheme of the present invention, the rotation drive assembly includes a support, a motor, a driving gear, a gear ring, a rotating ring and a first cantilever. The motor is fixedly arranged on the support, and the output end of the motor is transmission-connected with the driving gear, and the driving gear is meshed with the gear ring. The gear ring is fixedly arranged on one side of the rotating ring. The support is also fixedly provided with a base, and the rotating ring is rotatably installed on the base. The side of the rotating ring away from the gear ring is fixedly connected to the first cantilever, and the first cantilever is located on the side of the base facing the graphite electrode, and a fan is arranged on the first cantilever.

[0014] As a further optimization scheme of the present invention, a second cantilever is fixedly provided on the side of the rotating ring away from the gear ring, and a shift rod is fixedly connected to the side of the second cantilever facing the graphite electrode. A shift leaf is provided at the end of the shift rod away from the second cantilever, and the shift leaf is in frictional contact with the flexible fin.

[0015] In a second aspect, the present invention also provides a graphitization furnace, comprising the above-mentioned graphitization furnace cooling device, a furnace core, an insulation layer and a furnace body, wherein the furnace core is placed in the furnace body, the furnace core is used to place the material to be graphitized, an insulation layer is provided between the furnace core and the furnace body, graphite electrodes are respectively provided at both ends of the furnace core, and a graphite electrode cooling device is provided on the surface of the graphite electrode exposed to the outside of the furnace body.

[0016] In a third aspect, the present invention further provides a graphite electrode cooling method applied to the above-mentioned graphitization furnace, comprising the following steps:

[0017] Injecting cooling medium into the medium cavity of the plate-type heat pipe and vacuum-sealing the medium cavity;

[0018] An adhesive layer is coated on the surface of the graphite electrode exposed outside the furnace body, and the surface of the plate heat pipe away from the heat sink is pressed onto the adhesive layer;

[0019] Driven by the rotating drive assembly, the fan performs coaxial circular motion around the graphite electrode, and the shifting rod drives the shifting blade to intermittently rub against the flexible fin under the transmission of the second cantilever;

[0020] When the temperature of the graphite electrode rises to the phase transition temperature of the cooling medium, the gallium-indium-tin alloy in the plate heat pipe liquefies and vaporizes to transfer heat.

[0021] The present invention has at least the following beneficial effects: the present invention provides a graphite electrode cooling device for a graphitization furnace, a graphitization furnace, and a cooling method, wherein the graphite electrode cooling device includes a cooling mechanism, the cooling mechanism including a plate-type heat pipe and an adhesive layer, the plate-type heat pipe being fixed to the surface of the exposed graphite electrode by means of the adhesive layer, and a cooling medium being injected into the medium cavity of the plate-type heat pipe, and heat dissipated by heat transfer through the phase change of the cooling medium. Compared with the traditional water cooling cycle, the water saving rate is 100%, and ineffective heat exchange is avoided before the phase change temperature of the cooling medium is reached;

[0022] In addition, a heat sink and flexible fins are arranged on the outside of the plate-type heat pipe to increase the heat dissipation area. At the same time, under the blowing of the fan, the air flow drives the flexible fins to swing slightly with the air flow. This swing helps to destroy the thermal boundary layer on the surface of the flexible fins.

[0023] In addition, when the fan is not blowing on the flexible fins, the lever's moving blades can be used to rub against the flexible fins. Compared with the wind blowing, the vibration amplitude of the flexible fins under the vibration is increased, so that the flexible fins can use their own vibration to disturb the surrounding airflow when they are not being blown, thereby ensuring the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 The present invention Figure 1 Schematic diagram of the cooling mechanism and the side structure of the graphite electrode;

[0026] Figure 3 1 is a schematic diagram of the top view of the plate-type heat pipe of the present invention;

[0027] Figure 4 Schematic diagram of the cross-sectional structure of the plate-type heat pipe of the present invention;

[0028] Figure 5 It is a schematic diagram of the partial front structure of the cooling mechanism and graphite electrode of the present invention;

[0029] Figure 6This invention Figure 5 Enlarged view of point A in the middle;

[0030] Figure 7 It is a schematic diagram of the partial structure of the cooling mechanism, graphite electrode and shift rod of the present invention;

[0031] Figure 8 It is a side structural schematic diagram of the base and the rotating ring of the present invention.

[0032] In the figure: 1. Cooling mechanism; 11. Adhesion layer; 12. Plate heat pipe; 121. Sealed shell; 122. Capillary wick layer; 123. Dielectric cavity; 124. Liquid injection hole; 13. Heat sink; 14. Flexible fin; 15. Support; 16. Motor; 17. Driving gear; 18. Gear ring; 19. First cantilever; 110. Fan; 111. Paddle; 112. Second cantilever; 113. Paddle blade; 114. Base; 115. Rotating ring; 2. Graphite electrode; 3. Furnace body; 4. Insulation layer; 5. Furnace core. DETAILED DESCRIPTION

[0033] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0034] In one embodiment, if Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the present invention provides a graphite electrode cooling device for a graphitization furnace, including a cooling mechanism 1, wherein the cooling mechanism 1 includes an adhesion layer 11 and a plate-type heat pipe 12. The surface of the graphite electrode 2 exposed outside the graphitization furnace is provided with the adhesion layer 11, and the plate-type heat pipe 12 is provided on the side of the adhesion layer 11 away from the surface of the graphite electrode 2. The plate-type heat pipe 12 includes a sealed shell 121, and a medium cavity 123 is provided inside the sealed shell 121. The inner wall of the medium cavity 123 is provided with a capillary wick layer 122, and the medium cavity 123 stores a cooling medium.

[0035] In the above embodiment, the phase change heat transfer of the cooling medium eliminates the need for circulating water resources and results in a 100% water saving rate. Furthermore, due to the constraint of the phase change temperature of the cooling medium, the cooling medium does not perform phase change heat transfer below the phase change temperature, and cooling is only started when the graphite electrode 2 is at a high temperature. This means that in this low-temperature environment, the graphite electrode 2 can be cooled by natural cooling, thereby solving the problem of ineffective cooling caused by traditional cooling water circulation and avoiding ineffective heat exchange.

[0036] Among them, illustratively, the cooling medium is a gallium indium tin alloy, and the storage space of the cooling medium is in a vacuum state. The vacuum environment can effectively isolate the air and prevent the alloy from contacting with oxygen, thereby preventing oxidation, ensuring the stability of the alloy's performance, and extending its service life.

[0037] It should be noted that the gallium indium tin alloy is used as the cooling medium of the plate heat pipe 12, and the mass ratio of gallium, indium, and tin in the gallium indium tin alloy is 60% to 70%: 20% to 25%: 10% to 15%, so that the phase change temperature of the cooling medium is controlled at 100°C to 120°C. For example, the mass ratio of gallium, indium, and tin in the gallium indium tin alloy is 65%: 22%: 13%, so that the phase change temperature of the cooling medium is controlled at 105°C. That is, when the gallium indium tin alloy under this ratio is used as the cooling medium, only when the temperature of the graphite electrode 2 rises to 105°C, the gallium indium tin alloy in the plate heat pipe 12 begins to liquefy from a solid state, and as the temperature of the graphite electrode 2 continues to rise, the gallium indium tin alloy vaporizes and transfers heat. In other embodiments, the mass ratio of gallium, indium, and tin in the gallium indium tin alloy can be adjusted according to the working environment of the graphite electrode 2 to control the phase change temperature of the gallium indium tin alloy, which is not limited here.

[0038] It should be noted that a liquid injection hole 124 is provided on the surface of the plate-type heat pipe 12 for injecting the cooling medium into the medium cavity 123. A sealing cap is provided in the liquid injection hole 124. Specifically, after the cooling medium is injected, the vacuum end of a vacuum pump is connected to the liquid injection hole 124 to evacuate the medium cavity 123 to a vacuum state.

[0039] Exemplarily, the material of the adhesive layer 11 is a thermally conductive adhesive layer, such as high thermal conductivity silicone, whose thermal conductivity coefficient is ≥3.5W / m·K, so as to achieve close attachment of the plate heat pipe 12 to the surface of the graphite electrode 2, wherein, under pressure extrusion, the contact gap between the plate heat pipe 12 and the graphite electrode 2 is less than 0.1mm. The smaller the contact gap, the shorter the heat transfer path, ensuring heat transfer between the graphite electrode 2 and the plate heat pipe 12, and thus ensuring the heat dissipation efficiency of the plate heat pipe 12.

[0040] Furthermore, in order to improve the anti-oxidation treatment of the graphite electrode 2 , the adhesion layer 11 is coated on the entire outer surface of the graphite electrode 2 to isolate it from air contact and reduce oxidation loss.

[0041] It should be noted that, since the outer surface of the graphite electrode 2 is a cylindrical arc surface, the fitting surface of the plate-type heat pipe 12 is set to be an arc surface adapted to the outer surface of the graphite electrode 2, such as Figure 7 As shown, the gap between the plate-type heat pipe 12 and the graphite electrode 2 is made uniform, thereby avoiding local heat accumulation in the plate-type heat pipe 12 .

[0042] For example, see Figure 2 and Figure 3 A plurality of heat dissipation plates 13 are fixedly provided on the side of the plate heat pipe 12 away from the adhesive layer 11. The plurality of heat dissipation plates 13 are arranged in an array along the laying direction of the plate heat pipe 12. One end of the heat dissipation plate 13 extending to the outside of the plate heat pipe 12 is bent toward the side away from the adhesive layer 11, wherein a flexible fin 14 is provided on the side of the bent end of the heat dissipation plate 13.

[0043] It should be noted that the laying direction of the plate heat pipe 12 is Figure 1 As shown, along the axis of the graphite electrode 2 , a plurality of plate-type heat pipes 12 are laid in sequence, and adjacent plate-type heat pipes 12 are butted end to end.

[0044] By providing a plurality of heat sinks 13 with bent portions on the plate heat pipe 12, and having flexible fins 14 at the bent ends of the heat sinks 13, the heat dissipation area of ​​the plate heat pipe 12 is increased, and the heat dissipation efficiency of the plate heat pipe 12 can be accelerated during convection of external air. The flexible fins 14 are arranged in groups, and the spacing between adjacent flexible fins 14 is 5-8 mm, for example.

[0045] For example, see Figure 5 The cooling mechanism 1 also includes a fan 110 and a rotation drive assembly. The output end of the rotation drive assembly is transmission-connected to the fan 110. The fan 110 is arranged on the side of the plate-type heat pipe 12 away from the graphite electrode 2. The rotation drive assembly is used to drive the fan 110 to perform coaxial circular motion around the graphite electrode 2.

[0046] Continue reading Figure 5 and Figure 8 The rotation drive assembly includes a support 15, a motor 16, a driving gear 17, a gear ring 18, a rotating ring 115 and a first cantilever 19. The motor 16 is fixedly arranged on the support 15. The output end of the motor 16 is transmission-connected with the driving gear 17. The driving gear 17 is meshed with the gear ring 18. The gear ring 18 is fixedly arranged on one side of the rotating ring 115. A base 114 is also fixedly arranged on the support 15. The rotating ring 115 is rotatably mounted on the base 114. The side of the rotating ring 115 away from the gear ring 18 is fixedly connected to the first cantilever 19. The first cantilever 19 is located on the side of the base 114 facing the graphite electrode 2. The first cantilever 19 is provided with a fan 110.

[0047] Thus, under the drive of the motor 16, the driving gear 17 engages the gear ring 18 to rotate, and under the guidance constraint of the base 114, the gear ring 18 drives the rotating ring 115 to rotate, wherein the rotation axis of the rotating ring 115 is collinear with the axis of the graphite electrode 2, so that the rotating ring 115 drives the fan 110 to move circumferentially through the first cantilever 19 to cool the plate-type heat pipe 12 on the circumferential side wall of the graphite electrode 2, so that the flexible fins 14 can swing slightly with the flow of air, and this swing helps to destroy the thermal boundary layer on the surface of the flexible fins 14. The thermal boundary layer refers to a layer of air close to the heat dissipation surface, whose temperature gradient is large and will hinder the transfer of heat. The swing of the flexible fins 14 causes the thermal boundary layer to be continuously updated, making it easier for heat to be transferred from the heat dissipation surface to the air, further enhancing the heat dissipation effect. Exemplarily, the material of the flexible fins 14 is one of aluminum, aluminum alloy, copper, copper alloy, and polyimide (PI), which is not limited here.

[0048] Continue reading Figure 6 and Figure 7 A second cantilever 112 is fixedly provided on the side of the rotating ring 115 away from the gear ring 18, and a shifting rod 111 is fixedly connected to the side of the second cantilever 112 facing the graphite electrode 2. A shifting leaf 113 is provided on the end of the shifting rod 111 away from the second cantilever 112, and the shifting leaf 113 is in frictional contact with the flexible fin 14.

[0049] It should be noted that the second cantilever 112 is arranged opposite to the first cantilever 19, so that for the area that the fan 110 cannot reach, the flexible fins 14 in the area that cannot be blown are first moved with the help of the moving blades 113 on the moving rod 111 on the second cantilever 112. Compared with the wind blowing, the shaking amplitude of the flexible fins 14 under the moving is increased, so that the flexible fins 14 can use their own shaking to disturb the surrounding airflow when they are not blown, thereby ensuring the heat dissipation effect.

[0050] In one embodiment, the present invention also provides a graphitization furnace, comprising the above-mentioned cooling device of the graphitization furnace, a furnace core 5, an insulation layer 4 and a furnace body 3, wherein the furnace core 5 is placed in the furnace body 3, and the furnace core 5 is used to place the material to be graphitized. A thermal insulation layer 4 is arranged between the furnace core 5 and the furnace body 3, and graphite electrodes 2 are respectively arranged at both ends of the furnace core 5, and the outer ends of the graphite electrodes 2 are exposed to the outside of the furnace body 3, wherein a graphite electrode cooling device is provided on the surface of the graphite electrode 2 exposed to the outside of the furnace body 3.

[0051] In one embodiment, the present invention further provides a graphite electrode cooling method applied to the above-mentioned graphitization furnace, comprising the following steps:

[0052] Injecting cooling medium into the medium cavity 123 of the plate-type heat pipe 12, and vacuum-sealing the medium cavity 123;

[0053] An adhesive layer 11 is coated on the surface of the graphite electrode 2 exposed outside the furnace body 3, and the surface of the plate-type heat pipe 12 away from the heat sink 13 is pressed against the adhesive layer 11;

[0054] Driven by the rotating drive assembly, the fan 110 performs coaxial circular motion around the graphite electrode 2, and the shifting rod 111 drives the shifting blade 113 to intermittently rub against the flexible fin 14 under the transmission of the second cantilever 112;

[0055] When the temperature of the graphite electrode 2 rises to the phase transition temperature of the cooling medium, the gallium-indium-tin alloy in the plate-type heat pipe 12 liquefies and vaporizes to transfer heat.

[0056] It should be noted that, when the graphite electrode cooling device of the graphitization furnace is in use, a cooling medium, such as a gallium-indium-tin alloy, is injected into the medium cavity 123 of the plate-type heat pipe 12 and stored in a vacuum state. An adhesive layer 11 is coated on the surface of the graphite electrode 2 exposed to the outside of the furnace body 3, and the surface of the plate-type heat pipe 12 away from the heat sink 13 is pressed against the adhesive layer 11.

[0057] When the graphitization furnace is working, the graphite electrode 2 generates heat. When the temperature of the graphite electrode 2 reaches the phase transition temperature of the gallium indium tin alloy, the gallium indium tin alloy liquefies from a solid state and further vaporizes to transfer heat, thereby dissipating heat with the help of the plate heat pipe 12. In addition, the heat sink 13 and flexible fins 14 are provided on the outside of the plate heat pipe 12 to enhance the heat dissipation effect. In this process, there is no need to set up cooling water pipes and circulating water, and the water saving rate is 100%. In addition, before the phase transition temperature of the gallium indium tin alloy is reached, the gallium indium tin alloy will not undergo phase change, thereby avoiding ineffective heat exchange.

[0058] In addition, a fan 110 is arranged outside the plate heat pipe 12, and the fan 110 makes circumferential motion around the graphite electrode 2 to cool the plate heat pipe 12, the heat sink 13 and the flexible fins 14. Moreover, a lever 111 is provided in a place where the fan 110 has not blown, and the flexible fins 14 are moved with the help of the moving blades 113 on the lever 111. Compared with the wind blowing, the vibration amplitude of the flexible fins 14 under the movement is increased, so that the flexible fins 14 can use their own vibration to disturb the surrounding airflow when they are not blown, thereby ensuring the heat dissipation effect.

[0059] The above-described embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A graphite electrode cooling device for a graphitization furnace, characterized in that: The invention comprises a cooling mechanism (1), wherein the cooling mechanism (1) comprises an adhesion layer (11) and a plate-type heat pipe (12); the surface of a graphite electrode (2) exposed outside a graphitization furnace is provided with the adhesion layer (11); the plate-type heat pipe (12) is provided on a side of the adhesion layer (11) away from the surface of the graphite electrode (2); wherein the plate-type heat pipe (12) comprises a sealed housing (121); a medium cavity (123) is provided inside the sealed housing (121); a capillary core layer (122) is provided on the inner wall of the medium cavity (123); and a cooling medium is stored in the medium cavity (123).

2. The graphite electrode cooling device for a graphitization furnace according to claim 1, characterized in that: The cooling medium is a gallium-indium-tin alloy, and the storage space of the cooling medium is in a vacuum state.

3. The graphite electrode cooling device for a graphitization furnace according to claim 2, characterized in that: The phase change temperature of the cooling medium is 100°C to 120°C.

4. The graphite electrode cooling device for a graphitization furnace according to claim 3, characterized in that: The mass ratio of gallium, indium and tin in the gallium-indium-tin alloy is 60% to 70%: 20% to 25%: 10% to 15%.

5. The graphite electrode cooling device for a graphitization furnace according to claim 4, characterized in that: A plurality of heat dissipation plates (13) are fixedly provided on a side of the plate-type heat pipe (12) away from the adhesive layer (11), and the plurality of heat dissipation plates (13) are arranged in an array along the laying direction of the plate-type heat pipe (12). One end of the heat dissipation plate (13) extending to the outside of the plate-type heat pipe (12) is bent toward a side away from the adhesive layer (11), wherein a flexible fin (14) is provided on the side of the bent end of the heat dissipation plate (13).

6. The graphite electrode cooling device for a graphitization furnace according to claim 5, characterized in that: The cooling mechanism (1) further comprises a fan (110) and a rotation drive assembly, wherein the output end of the rotation drive assembly is in transmission connection with the fan (110), the fan (110) is arranged on a side of the plate-type heat pipe (12) away from the graphite electrode (2), and the rotation drive assembly is used to drive the fan (110) to perform coaxial circular motion around the graphite electrode (2).

7. The graphite electrode cooling device for a graphitization furnace according to claim 6, characterized in that: The rotation drive assembly comprises a support (15), a motor (16), a driving gear (17), a gear ring (18), a rotating ring (115) and a first cantilever (19). The motor (16) is fixedly arranged on the support (15). The output end of the motor (16) is transmission-connected with the driving gear (17). The driving gear (17) is meshed with the gear ring (18). The gear ring (18) is fixedly arranged on one side of the rotating ring (115). A base (114) is also fixedly arranged on the support (15). The rotating ring (115) is rotatably mounted on the base (114). A side of the rotating ring (115) away from the gear ring (18) is fixedly connected with the first cantilever (19). The first cantilever (19) is located on a side of the base (114) facing the graphite electrode (2). A fan (110) is arranged on the first cantilever (19).

8. The graphite electrode cooling device for a graphitization furnace according to claim 7, characterized in that: A second cantilever (112) is fixedly provided on the side of the rotating ring (115) away from the gear ring (18); a shifting rod (111) is fixedly connected to the side of the second cantilever (112) facing the graphite electrode (2); a shifting leaf (113) is provided on one end of the shifting rod (111) away from the second cantilever (112); and the shifting leaf (113) is in frictional contact with the flexible fin (14).

9. A graphitization furnace, characterized in that: The invention comprises a cooling device for a graphitization furnace according to claim 8, a furnace core (5), a thermal insulation layer (4) and a furnace body (3), wherein the furnace core (5) is placed in the furnace body (3), and the furnace core (5) is used to place materials to be graphitized. A thermal insulation layer (4) is provided between the furnace core (5) and the furnace body (3), and graphite electrodes (2) are respectively provided at both ends of the furnace core (5), and the outer ends of the graphite electrodes (2) are exposed to the outside of the furnace body (3), wherein a graphite electrode cooling device is provided on the surface of the graphite electrode (2) exposed to the outside of the furnace body (3).

10. A graphite electrode cooling method used in the graphitization furnace according to claim 9, characterized in that: The following steps are involved: Injecting a cooling medium into the medium cavity (123) of the plate-type heat pipe (12), and vacuum-sealing the medium cavity (123); An adhesive layer (11) is coated on the surface of the graphite electrode (2) exposed outside the furnace body (3), and a surface of the plate-type heat pipe (12) away from the heat dissipation plate (13) is pressed onto the adhesive layer (11); Driven by the rotating drive assembly, the fan (110) performs coaxial circular motion around the graphite electrode (2), and the shifting rod (111) drives the shifting blade (113) to intermittently rub against the flexible fin (14) under the transmission of the second cantilever (112); When the temperature of the graphite electrode (2) rises to the phase transition temperature of the cooling medium, the gallium-indium-tin alloy in the plate-type heat pipe (12) liquefies and vaporizes to transfer heat.

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