Method for discharging a vertical series connection graphitization furnace

Abstract

The present application relates to the field of graphitization furnace, in particular to a vertical series connection graphitization furnace discharging method, the pushing mechanism drives the graphite electrode at the bottom of the furnace body to slide downwards to be flush with the lower edge of the inclined entrance at the lower part of the discharge channel, the high-temperature plug valve is opened, the heat preservation material flows out of the furnace body along the discharge channel; when the heat preservation material of the furnace core drops to be flush with the lower edge of the graphite electrode at the top of the furnace body, the pushing mechanism drives the graphite electrode at the top of the furnace body to slide upwards to leave the furnace body; when the heat preservation material of the furnace core drops to the uppermost crucible and the crucible connection, the high-temperature plug valve is closed, and after the uppermost crucible is cooled, it is removed from the furnace body from above; the high-temperature plug valve is opened, and the heat preservation material of the furnace core flows out of the furnace body along the discharge channel; the heat preservation material is discharged, and the crucible is removed; when the heat preservation material of the furnace core is emptied, the lowermost crucible is removed; the pushing mechanism drives the graphite electrode at the bottom of the furnace body to slide downwards to leave the furnace body. The heat preservation material is directly discharged from the bottom of the furnace body without passing through the material suction crane, which reduces the cooling time and improves the production efficiency.

Description

Technical Field

[0001] This invention relates to the field of graphitization furnace production technology, and in particular to a method for unloading a vertically connected series graphitization furnace. Background Technology

[0002] Anode materials are a core component of new energy power batteries. With the government's positive guidance for the development of new energy vehicles, the production capacity of anode materials is constantly expanding. The production of anode materials uses graphitization furnaces. The process involves using electricity to heat graphitizable carbon to 3000℃ for graphitization modification to obtain graphitized anode materials. After reaching the set temperature, the power supply is stopped, and the graphitized anode materials at high temperature are naturally cooled to the furnace outlet temperature before being unloaded. Graphitization furnaces mainly include Atcheson furnaces, series furnaces, and box furnaces. Compared with Atcheson and box furnaces, series furnaces produce the highest quality anode materials. However, series furnaces have low capacity and high energy consumption, therefore they are not widely used and are only used in the production of high-end anode materials.

[0003] Current series graphitization furnaces are typically horizontal, consisting of several crucibles filled with raw materials connected end-to-end to form a crucible series connection. Each end of this connection is connected to one end of a graphite electrode, and the other end of the electrode is equipped with a pushing mechanism. This mechanism presses the graphite electrode against the connected crucibles to reduce contact resistance. In actual production, due to the limited heat resistance of the suction crane used for unloading, the insulation material and crucibles need to cool to the unloading temperature before unloading can begin. The insulation material dissipates heat slowly, resulting in a long overall cooling process and low production efficiency. Furthermore, the long crucible series connection requires the pushing mechanism to apply significant force, leading to high power consumption. Additionally, series graphitization furnaces typically have only one crucible series connection or a U-shaped connection, resulting in a small furnace capacity. Summary of the Invention

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a method for unloading material from a vertical series graphitization furnace. By first discharging the required portion of the insulating material from the bottom of the furnace body and then waiting for cooling, the cooling time is reduced and the production efficiency is improved. Furthermore, a vertical series graphitization furnace for implementing the unloading method is provided. By setting up vertical crucible series lines, the self-weight of the crucibles is used to reduce the thrust required by the pushing mechanism. The use of multiple crucible series lines also increases the single-furnace output of the series graphitization furnace.

[0005] To achieve the above objectives, the main technical solutions adopted by the present invention include: A method for unloading from a vertical series graphitization furnace includes the following steps: S01: The top pushing mechanism drives the graphite electrode at the bottom of the furnace body to slide down until it is flush with the lower edge of the inclined inlet of the discharge channel, opening the high-temperature slide valve, and the insulation material flows out of the furnace body along the discharge channel; S02; When the furnace core insulation material descends to be level with the lower edge of the graphite electrode at the top of the furnace body, the pushing mechanism drives the graphite electrode at the top of the furnace body to slide upward and away from the furnace body. S03: When the furnace core insulation material descends to the connection between the uppermost crucible and the next uppermost crucible, close the high-temperature slide valve and wait for the uppermost crucible to cool down before removing it from the furnace body from above. S04: Open the high-temperature slide valve, and the furnace core insulation material flows out of the furnace body along the discharge channel; Repeat steps S03 and S04; S05: When the furnace core insulation material is emptied, remove the bottommost crucible; S06: The top-pushing mechanism drives the graphite electrode at the bottom of the furnace body to slide downwards until it leaves the furnace body.

[0006] By discharging the required portion of insulation material from the bottom of the furnace and waiting for it to cool, the insulation material can be discharged directly from the bottom of the furnace without going through the suction crane, reducing cooling time and improving production efficiency. Furthermore, the insulation material discharged from the bottom of the furnace is at a high temperature, and its waste heat can be recovered after collection, thus improving energy utilization.

[0007] A vertical series graphitization furnace for implementing the furnace discharge method includes a furnace core, a furnace body, a top-pushing mechanism, and a high-temperature gate valve. The furnace core includes crucibles and insulating material. Several crucibles are connected end-to-end in a vertical direction to form a crucible series line. The two ends of the crucible series line are connected to several graphite electrodes. The graphite electrodes are slidably arranged in a vertical direction. The end of the graphite electrode away from the crucible is connected to the top-pushing mechanism. Each graphite electrode at the bottom of the furnace body is provided with a discharge channel. The outlet of the discharge channel is provided with a high-temperature gate valve. The opening and closing of the discharge channel is controlled by the positions of the graphite electrode at the bottom of the furnace body and the high-temperature gate valve. The space inside the furnace core, excluding the crucible series line, is filled with insulating material.

[0008] By setting up vertical crucible series lines, the series graphitization furnace is made vertical, and the self-weight of the crucibles reduces the thrust required by the jacking mechanism, significantly reducing the power consumption of the jacking mechanism. Setting up several crucible series lines increases the output of a single furnace in the series graphitization furnace. By setting up a discharge channel at the bottom of the furnace body, the insulation material can be discharged directly from the bottom of the furnace body without passing through the suction crane, reducing cooling time and improving production efficiency. Moreover, the insulation material discharged from the bottom of the furnace body is at high temperature, and can be collected for waste heat recovery, improving energy utilization.

[0009] Furthermore, the discharge channel includes a graphite electrode channel, several upper inclined channels and several lower inclined channels. The upper inclined channel inlet is connected to the furnace core, the upper inclined channel outlet is connected to the graphite electrode channel, the lower inclined channel inlet is located below the upper inclined channel outlet and is connected to the graphite electrode channel, the lower inclined channel outlet is connected to the outer side of the bottom of the furnace body, and the high-temperature slide valve is located at the lower inclined channel outlet.

[0010] By setting up the discharge channel, the position of the graphite electrode at the bottom of the furnace body and the high-temperature slide valve can be controlled to determine whether the insulation material flows into the lower inclined channel. When the upper end of the graphite electrode at the bottom of the furnace body is below the lower edge of the lower inclined channel inlet and the high-temperature slide valve is open, the insulation material flows out of the furnace body smoothly through the upper inclined channel, the graphite electrode channel and the lower inclined channel in sequence.

[0011] Furthermore, several upper inclined channels are evenly arranged around the upper part of the graphite electrode channel, and several lower inclined channels are evenly arranged around the lower part of the graphite electrode channel. By evenly arranging the upper and lower inclined channels, the insulating material of the furnace core is discharged evenly, avoiding accumulation.

[0012] Furthermore, the lower inclined chute outlets that converge in the outlet directions are connected to form multiple lower inclined chute outlets, with the dimensions of these multiple lower inclined chute outlets being greater than or equal to the dimensions of the lower inclined chute outlet itself. By connecting the lower inclined chute outlets that converge in the outlet directions to form multiple lower inclined chute outlets, the shape of the discharge channel outlet is made regular, facilitating the collection of discharged insulation material, while also preventing the high-temperature gate valves located at the lower inclined chute outlets from obstructing each other's opening and closing.

[0013] Furthermore, the inlet size of the upper inclined chute is less than or equal to the outlet size of the upper inclined chute, the outlet size of the upper inclined chute is less than or equal to the inlet size of the lower inclined chute, and the inlet size of the lower inclined chute is less than or equal to the outlet size of the lower inclined chute. By setting the dimensional relationship of each inlet and outlet, the insulation material can flow smoothly out of the furnace body.

[0014] Furthermore, it also includes an electrode connector. The cross-sectional dimension of the crucible is larger than that of the graphite electrode. The crucible and the graphite electrode are connected by the electrode connector. The connection end of the electrode connector to the graphite electrode is a groove, and the outer edge of the groove is horizontal. By ensuring that the cross-sectional dimension of the crucible is larger than that of the graphite electrode and that the outer edge of the connection end of the electrode connector to the graphite electrode is horizontal, the force exerted by the crucible on the graphite electrode is distributed throughout the furnace body, preventing the crucible from detaching from the furnace body due to the weight of the crucible's connecting wires or the pressure of the pushing mechanism.

[0015] Furthermore, the various crucible series lines are arranged in a matrix within the furnace core. This matrix arrangement reduces the temperature influence between the individual crucible series lines, thus ensuring product quality.

[0016] The beneficial effects of this invention are: The present invention discloses a method for discharging the furnace from a vertical series graphitization furnace. By discharging the required portion of the insulating material from the bottom of the furnace body and waiting for it to cool, the insulating material can be discharged directly from the bottom of the furnace body without passing through the suction crane, which reduces the cooling time and improves production efficiency. Furthermore, the insulating material discharged from the bottom of the furnace body is at a high temperature, and can be collected for waste heat recovery, thereby improving energy utilization.

[0017] The vertical series graphitization furnace implementing the unloading method achieves a vertical configuration by setting up crucible series lines in a vertical direction. This reduces the thrust required by the jacking mechanism by utilizing the self-weight of the crucibles, significantly lowering the power consumption of the jacking mechanism. The use of multiple crucible series lines also increases the single-furnace output of the series graphitization furnace. Furthermore, by setting up a discharge channel at the bottom of the furnace, the insulating material can be discharged directly from the bottom of the furnace without passing through the suction crane, reducing cooling time and improving production efficiency. The insulating material discharged from the bottom of the furnace is at a high temperature, and its collection allows for waste heat recovery, improving energy utilization.

[0018] By setting up the discharge channel, the position of the graphite electrode at the bottom of the furnace body and the high-temperature slide valve can be controlled to determine whether the insulation material flows into the lower inclined channel. When the upper end of the graphite electrode at the bottom of the furnace body is below the lower edge of the lower inclined channel inlet and the high-temperature slide valve is open, the insulation material flows out of the furnace body smoothly through the upper inclined channel, the graphite electrode channel and the lower inclined channel in sequence.

[0019] By making the crucible's cross-sectional size larger than that of the graphite electrode and ensuring that the outer edge of the connection between the electrode connector and the graphite electrode is horizontal, the force exerted by the crucible on the graphite electrode is distributed throughout the furnace body, thus preventing the crucible from detaching from the furnace body due to the weight of the crucible's connecting wires or the pressure of the jacking mechanism. Attached Figure Description

[0020] Figure 1 This is a front sectional view of the vertical series graphitization furnace of the present invention. Figure 2 for Figure 1 Top view of section BB when no insulation material is filled in the middle; Figure 3 for Figure 1 Enlarged view of point A during the completion stage of loading the neutral series graphitization furnace; Figure 4 for Figure 1 Enlarged view of point A during the empty furnace stage of a neutral series graphitization furnace; Figure 5 for Figure 1 Enlarged view of point A during the loading stage of a neutral series graphitization furnace; Figure 6 for Figure 1 A magnified view of point A during the unloading stage of a neutral series graphitization furnace; Figure 7This is a front view of the electrode connector in this invention; Figure 8 This is a top view of the electrode connector in this invention; Figure 9 This is a front view of the crucible connector in this invention; Figure 10 This is a top view of the crucible connector in this invention.

[0021] In the diagram: 1. Furnace body; 2. Insulation material; 3. Graphite electrode; 4. Electrode connector; 5. Crucible; 6. Crucible connector; 7. Graphite electrode channel; 8. Upper ramp; 9. Lower ramp. Detailed Implementation

[0022] To better explain and facilitate understanding of the present invention, a detailed description of the invention is provided below with reference to the accompanying drawings and specific embodiments. In this document, directional terms such as "upper" and "lower" are used interchangeably with other directional terms. Figure 1 The orientation is for reference only. Although exemplary embodiments of the invention are shown in the accompanying drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention can be understood more clearly and thoroughly, and that the scope of the invention can be fully conveyed to those skilled in the art.

[0023] like Figure 1-10 As shown, the present invention provides a method for tapping out a vertically connected graphitization furnace and a vertically connected graphitization furnace for implementing the tapping method.

[0024] A method for unloading from a vertically connected series graphitization furnace includes the following steps: S01: The push mechanism drives the graphite electrode 3 at the bottom of the furnace body 1 to slide downwards until it is flush with the lower edge of the inlet of the lower inclined channel 9 of the discharge channel, opening the high-temperature slide valve, and the insulation material 2 flows out of the furnace body 1 along the discharge channel; at this time, Figure 6 The vertical series graphitization furnace is shown in the exit stage. S02; When the insulation material 2 descends to be flush with the lower edge of the graphite electrode 3 at the top of the furnace body 1, the pushing mechanism drives the graphite electrode 3 at the top of the furnace body 1 to slide upward away from the furnace body 1. S03: When the insulation material 2 descends to the connection between the uppermost crucible 5 and the next uppermost crucible 5, close the high-temperature slide valve and wait for the uppermost crucible 5 to cool down before removing it from the furnace body 1 from above. S04: Open the high-temperature slide valve, and the insulation material 2 flows out of the furnace body 1 along the discharge channel; Repeat steps S03 and S04; S05: When the insulation material 2 is emptied, remove the bottom crucible 5; S06: The push mechanism drives the graphite electrode 3 at the bottom of the furnace body 1 to slide downwards until it leaves the furnace body 1; at this time, Figure 4 The empty furnace stage of the vertical series graphitization furnace is shown.

[0025] By discharging the required portion of the insulation material 2 from the bottom of the furnace body 1 and waiting for it to cool, the insulation material 2 can be discharged directly from the bottom of the furnace body 1 without going through the suction crane, which reduces the cooling time and improves production efficiency. In addition, the insulation material 2 discharged from the bottom of the furnace body 1 is at a high temperature, and can be collected for waste heat recovery, which improves energy utilization.

[0026] A vertical series graphitization furnace for implementing the furnace discharge method includes a furnace core, a furnace body 1, a top-pushing mechanism, and a high-temperature baffle valve. The furnace core includes crucibles 5 and insulating material 2. Several crucibles 5 are connected end to end in a vertical direction to form a crucible series line. The two ends of the several crucible series lines are connected to several graphite electrodes 3. The graphite electrodes 3 are slidably arranged in a vertical direction. The end of the graphite electrode 3 away from the crucible 5 is connected to the top-pushing mechanism. Each graphite electrode 3 at the bottom of the furnace body 1 is provided with a discharge channel. The outlet of the discharge channel is provided with a high-temperature baffle valve. The opening and closing of the discharge channel is controlled by the positions of the graphite electrodes 3 at the bottom of the furnace body 1 and the high-temperature baffle valve. The space inside the furnace core, excluding the crucible series lines, is filled with insulating material 2.

[0027] By setting up vertical crucible series lines, the series graphitization furnace is made vertical, and the self-weight of crucible 5 reduces the thrust required by the jacking mechanism, significantly reducing the power consumption of the jacking mechanism. By setting up several crucible series lines, the output of a single furnace in the series graphitization furnace is increased. In this embodiment, a total of 9 crucible series lines of 3×3 are used, which greatly increases the furnace loading capacity. By setting up a discharge channel at the bottom of the furnace body 1, the insulation material 2 can be discharged directly from the bottom of the furnace body 1 without going through the suction crane, reducing the cooling time and improving production efficiency. Moreover, the insulation material 2 discharged from the bottom of the furnace body 1 is at high temperature, and can be collected for waste heat recovery, improving energy utilization.

[0028] Specifically, the discharge channel includes a graphite electrode channel 7, several upper inclined channels 8 and several lower inclined channels 9. The inlet of the upper inclined channel 8 is connected to the furnace core, and the outlet of the upper inclined channel 8 is connected to the graphite electrode channel 7. The inlet of the lower inclined channel 9 is located below the outlet of the upper inclined channel 8 and is connected to the graphite electrode channel 7. The outlet of the lower inclined channel 9 is connected to the outer side of the bottom of the furnace body 1. The high-temperature slide valve is located at the outlet of the lower inclined channel 9.

[0029] By setting the discharge channel, the position of the graphite electrode 3 at the bottom of the furnace body 1 and the high-temperature slide valve can be controlled to determine whether the insulation material 2 flows into the lower inclined channel 9. When the upper end of the graphite electrode 3 at the bottom of the furnace body 1 is below the lower edge of the inlet of the lower inclined channel 9 and the high-temperature slide valve is open, the insulation material 2 flows out of the furnace body 1 smoothly through the upper inclined channel 8, the graphite electrode channel 7, and the lower inclined channel 9 in sequence.

[0030] Specifically, several upper inclined channels 8 are evenly arranged around the upper part of the graphite electrode channel 7, and several lower inclined channels 9 are evenly arranged around the lower part of the graphite electrode channel 7. By evenly arranging the upper inclined channels 8 and the lower inclined channels 9, the insulation material 2 of the furnace core is evenly discharged, avoiding accumulation.

[0031] Specifically, the outlets of the lower inclined ducts 9, which converge in the outlet directions, are connected to form multiple outlets of the lower inclined ducts 9, and the size of these multiple outlets is greater than or equal to the size of the lower inclined duct 9 outlet. By connecting the outlets of the lower inclined ducts 9, which converge in the outlet directions, into multiple outlets, the shape of the discharge channel outlet is made regular, which facilitates the collection of the discharged insulation material 2, while avoiding mutual obstruction of the opening and closing of the various high-temperature slide valves located at the outlets of the lower inclined ducts 9.

[0032] Specifically, the inlet size of the upper inclined duct 8 is less than or equal to the outlet size of the upper inclined duct 8, the outlet size of the upper inclined duct 8 is less than or equal to the inlet size of the lower inclined duct 9, and the inlet size of the lower inclined duct 9 is less than or equal to the outlet size of the lower inclined duct 9. By setting the dimensional relationship of each inlet and outlet, the insulation material 2 can flow smoothly out of the furnace body 1.

[0033] Specifically, it also includes an electrode connector 4. The cross-sectional dimension of the crucible 5 is larger than that of the graphite electrode 3. The crucible 5 and the graphite electrode 3 are connected by the electrode connector 4. The connection end of the electrode connector 4 and the graphite electrode 3 is a groove, and the outer edge of the groove is horizontal. By ensuring that the cross-sectional dimension of the crucible 5 is larger than that of the graphite electrode 3 and that the outer edge of the connection end of the electrode connector 4 and the graphite electrode 3 is horizontal, the force exerted by the crucible 5 on the graphite electrode 3 is distributed to the furnace body 1, preventing the crucible 5 from detaching from the furnace body 1 due to the weight of the crucible series connection or the pressure of the pushing mechanism.

[0034] More specifically, both the crucible 5 and the graphite electrode 3 are cylindrical, and the connection end between the electrode connector 4 and the crucible 5 is also a groove. The diameter of the groove is 5 mm larger than the diameter of the crucible 5, and the diameter of the groove at the connection end between the electrode connector 4 and the graphite electrode 3 is 5 mm larger than the diameter of the graphite electrode 3, in order to ensure installation accuracy.

[0035] A crucible connector 6 is provided between crucibles 5 to ensure accurate connection of crucibles 5. Both ends of the crucible connector 6 are grooves with a groove diameter 5mm larger than the crucible diameter to ensure installation error.

[0036] Specifically, the various crucible connection lines are arranged in a matrix within the furnace core. This matrix arrangement reduces the temperature influence between the individual crucible connection lines, thus ensuring product quality.

[0037] It should be noted that the jacking mechanism and the high-temperature gate valve are mature components, therefore the accompanying drawings and embodiments of the present invention are not explained in detail.

[0038] The loading process for a vertical series graphitization furnace is as follows: Figure 4 The diagram shows the empty furnace stage of a vertical series graphitization furnace. First, a top-pushing mechanism is used to push the graphite electrode 3 at the bottom of the furnace body 1 until its top is flush with the inner wall of the furnace body 1. Then, an electrode connector 4 is placed from above the furnace body 1, positioned at the top of the graphite electrode 3 at the bottom of the furnace body 1. At this point, the lower surface of the outer edge of the electrode connector 4 connecting to the graphite electrode 3 is in contact with the furnace body 1. Figure 5 The loading stage of the vertical series graphitization furnace is shown.

[0039] Next, place the crucible 5 from above the furnace body 1, with the crucible connector 6 placed at the bottom of the crucible 5. Then, fill the furnace core with insulation material 2 until the top of the crucible 5 is almost flush. Place the crucible 5 again from above the furnace body 1, placing it in the groove of the crucible connector 6. Place the crucible connector 6 on top of the crucible 5, and fill the furnace core with insulation material 2 until the top of the crucible 5 is almost flush. Repeat the above operation, layer by layer, loading the crucible 5, crucible connector 6, and insulation material 2 until all the crucibles 5 are loaded into the furnace. Finally, install the electrode connector 4 at the top of the uppermost crucible 5, connecting the electrode connector 4 to the graphite electrode 3 at the top of the furnace body 1. Fill the furnace core with insulation material 2 until it is flush with the top of the furnace body 1. The pushing mechanism connecting the graphite electrode 3 at the top of furnace body 1 and the graphite electrode 3 at the bottom of furnace body 1 applies a certain external force, causing the graphite electrode 3 at the top of furnace body 1, the crucible 5, and the graphite electrode 3 at the bottom of furnace body 1 to fit tightly together to form a crucible series connection line, i.e. Figure 3 The furnace loading completion stage is shown.

[0040] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for tapping out a vertically connected series graphitization furnace, characterized in that, The graphitization furnace includes a furnace core, a furnace body (1), a push mechanism and a high-temperature slide valve. The furnace core includes a crucible (5) and insulation material (2). Several crucibles (5) are connected end to end in the vertical direction to form a crucible string line. The space inside the furnace core outside the crucible string line is filled with insulation material (2). The method includes the following steps: S01: The push mechanism drives the bottom graphite electrode (3) of the furnace body (1) to slide down to be flush with the lower edge of the inlet of the lower inclined channel (9) of the discharge channel, and opens the high temperature slide valve, and the insulation material (2) flows out of the furnace body (1) along the discharge channel. S02; When the insulation material (2) descends to be flush with the lower edge of the graphite electrode (3) at the top of the furnace body (1), the push mechanism drives the graphite electrode (3) at the top of the furnace body (1) to slide upward away from the furnace body (1). S03: When the insulation material (2) descends to the connection between the uppermost crucible (5) and the next uppermost crucible (5), close the high-temperature slide valve and wait for the uppermost crucible (5) to cool down before removing it from the furnace body (1) from above. S04: Open the high temperature slide valve, and the insulation material (2) flows out of the furnace body (1) along the discharge channel; Repeat steps S03 and S04; S05: When the insulation material (2) is emptied, remove the bottom crucible (5); S06: The push mechanism drives the bottom graphite electrode (3) of the furnace body (1) to slide down until it leaves the furnace body (1).

2. A vertical series graphitization furnace implementing the tapping method of claim 1, characterized in that, Several crucibles are connected to several graphite electrodes (3) at both ends. The graphite electrodes (3) are slidably arranged in the vertical direction. The end of the graphite electrode (3) away from the crucible (5) is connected to the push mechanism. Each graphite electrode (3) at the bottom of the furnace body (1) is provided with a discharge channel. The outlet of the discharge channel is provided with a high-temperature slide valve. The opening and closing of the discharge channel is controlled by the positions of the graphite electrode (3) at the bottom of the furnace body (1) and the high-temperature slide valve.

3. The vertical series graphitization furnace as described in claim 2, characterized in that: The discharge channel includes a graphite electrode channel (7), several upper inclined channels (8) and several lower inclined channels (9). The inlet of the upper inclined channel (8) is connected to the furnace core, and the outlet of the upper inclined channel (8) is connected to the graphite electrode channel (7). The inlet of the lower inclined channel (9) is located below the outlet of the upper inclined channel (8) and is connected to the graphite electrode channel (7). The outlet of the lower inclined channel (9) is connected to the outer side of the bottom of the furnace body (1). The high-temperature slide valve is located at the outlet of the lower inclined channel (9).

4. The vertical series graphitization furnace as described in claim 3, characterized in that: Several upper inclined channels (8) are evenly arranged around the upper part of the graphite electrode channel (7), and several lower inclined channels (9) are evenly arranged around the lower part of the graphite electrode channel (7).

5. The vertical series graphitization furnace as described in claim 4, characterized in that: The lower ramps (9) where the exit directions intersect are connected to form multiple lower ramp exits, and the size of the multiple lower ramp exits is greater than or equal to the size of the lower ramp (9) exit.

6. The vertical series graphitization furnace as described in claim 3, characterized in that: The inlet size of the upper ramp (8) is less than or equal to the outlet size of the upper ramp (8), the outlet size of the upper ramp (8) is less than or equal to the inlet size of the lower ramp (9), and the inlet size of the lower ramp (9) is less than or equal to the outlet size of the lower ramp (9).

7. The vertical series graphitization furnace as described in claim 2, characterized in that: It also includes an electrode connector (4), the cross-sectional dimension of the crucible (5) is larger than the cross-sectional dimension of the graphite electrode (3), the crucible (5) and the graphite electrode (3) are connected by the electrode connector (4), the connection end of the electrode connector (4) and the graphite electrode (3) is a groove, and the outer edge of the groove is a horizontal surface.

8. The vertical series graphitization furnace as described in claim 2, characterized in that: The crucible string lines are arranged in a rectangular array in the furnace core.

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