Graphite negative electrode material carbonization, graphitization and crucible roasting integrated device and method

Abstract

The invention discloses a graphite negative electrode material carbonization, graphitization and crucible roasting integrated device and method, the device comprises a furnace body, a carbonization mechanism and a pushing mechanism, the furnace body comprises a thermal insulation layer, a heating layer and a first plugging block; the carbonization mechanism comprises a funnel and a discharge valve; the pushing mechanism is used for pushing the crucible in the containing cavity into the heating cavity. The heating furnace has the beneficial effects that the accommodating cavity is formed in the thermal insulation layer, and the temperature of the accommodating cavity is lower than that of the heating cavity, so that a graphitization process can be carried out in the heating cavity, and graphite negative electrode material carbonization and crucible roasting processes can be carried out in the accommodating cavity, so that objects with different target temperatures can be heated in partial areas in one furnace body; the crucible in the containing cavity is pushed into the heating cavity through the pushing mechanism, so that the carbonized graphite negative electrode material and the heated crucible in the containing cavity do not need to be taken out and are directly pushed into the heating cavity, heat waste can be reduced, and environmental protection benefits are improved.

Description

Technical Field

[0001] The invention relates to the technical field of graphitization of graphite negative electrode materials, and in particular to an integrated device and method for carbonization, graphitization and crucible roasting of graphite negative electrode materials. Background Art

[0002] The carbonization and graphitization of graphite negative electrode materials are important links in the preparation process of negative electrode materials for lithium-ion batteries, and they each have different purposes and process characteristics.

[0003] Carbonization refers to calcining the negative electrode material in a high temperature environment to evaporate or dissolve the non-carbon elements in it, thereby increasing the carbon content of the material and improving its conductivity. The carbonization process is generally carried out in the range of 700-1000°C and is a pretreatment step before graphitization. During the carbonization process, a carbonization furnace is required to carbonize the negative electrode material; Graphitization refers to the process of heating the carbonized carbonaceous material to 2300-3000℃ to convert the amorphous chaotic layer structure into an ordered graphite crystalline structure. Graphitization is the core process of preparing artificial graphite negative electrode, which plays a decisive role in the quality and quality stability of the product. In the graphitization process, a graphitization furnace is required; Meanwhile, in the graphitization furnace, the carbonaceous material is usually loaded into the crucible, and then the crucible is placed in the graphitization furnace. When the crucible is made, the crucible blank needs to be heated and solidified by a heating furnace to obtain the crucible. Therefore, a heating furnace is also required to heat the crucible blank; Therefore, when the graphitization system is running, it is necessary to carbonize the negative electrode material through the carbonization furnace, graphitize the carbonized carbonaceous material through the graphitization furnace, and heat and solidify the crucible blank through the heating furnace to obtain the crucible. This not only increases the equipment purchase cost, but also the material will inevitably cool down after being removed from the carbonization furnace, and needs to be heated again after being loaded into the graphitization furnace. Similarly, the crucible will cool down after being taken out of the heating furnace, and needs to be heated again after being loaded into the graphitization furnace, which will result in a large amount of heat waste and reduce energy utilization efficiency. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and propose an integrated device and method for carbonization, graphitization and crucible roasting of graphite negative electrode materials, so as to solve the technical problems in the prior art that the carbonization, graphitization and crucible roasting of graphite negative electrode materials are carried out separately, resulting in increased equipment costs and heat waste.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: The present invention provides an integrated device and method for carbonization, graphitization and crucible roasting of graphite negative electrode materials, comprising: A furnace body, the furnace body comprising a heat preservation layer, a heating layer and a first blocking block, the heat preservation layer having a heating cavity at its center, a receiving cavity formed in the heat preservation layer, the receiving cavity being used to place a crucible blank, the receiving cavity being connected to the heating cavity via a first through hole, the receiving cavity being connected to the outside of the furnace body via a second through hole, the heating layer being arranged in the heating cavity, and the first blocking block being used to be plugged in the second through hole; A carbonization mechanism, the carbonization mechanism comprising a funnel and a discharge valve, the funnel is used to load graphite negative electrode raw materials, one end of the discharge valve is connected to the outlet of the funnel, and the other end of the discharge valve is connected to the inlet of the crucible blank; and, A pushing mechanism is used to push the crucible in the containing chamber into the heating chamber.

[0006] In some embodiments, a third through hole is further provided on the insulation layer, and the third through hole is communicated with the heating chamber. The furnace body further includes a second blocking block, and the second blocking block is used to be plugged in the third through hole.

[0007] In some embodiments, the heating layer is a resistive material layer.

[0008] In some embodiments, a feed hole is further provided on the insulation layer, and the lower end of the feed hole is located directly above the feed port of the funnel.

[0009] In some embodiments, the furnace body further includes a stopper rod, and the stopper rod is used to be plugged in the feed hole.

[0010] In some embodiments, a receiving groove is provided on the inner wall of the first through hole; the integrated device for carbonization, graphitization and crucible roasting of graphite negative electrode materials also includes a sealing mechanism, the sealing mechanism includes a sealing block and a lifting drive component, the sealing block is movably arranged in the first through hole, the lifting drive component is connected to the sealing block, and is used to drive the sealing block to move up and down, so that the sealing block is located in the first through hole or in the receiving groove.

[0011] In some embodiments, a plug hole connected to the receiving groove is provided on the outer wall of the thermal insulation layer; The lifting drive component includes a lifting drive cylinder and a lifting rod. The cylinder body of the lifting drive cylinder is fixed outside the insulation layer. The output shaft of the lifting drive cylinder is fixedly connected to one end of the lifting rod. The other end of the lifting rod passes through the socket and is fixedly connected to the sealing block.

[0012] In some embodiments, a guide hole is provided on the first blocking block, and the pushing mechanism includes a pushing cylinder, a push rod and a push plate. The cylinder body of the pushing cylinder is fixed to the first blocking block, the output shaft of the pushing cylinder is fixedly connected to one end of the push rod, and the other end of the push rod is fixedly connected to the push plate after passing through the guide hole, and the push plate is used to push the crucible.

[0013] In some embodiments, a first handle is formed on the first blocking block.

[0014] The present invention also provides a method for integrating carbonization, graphitization and crucible roasting of graphite negative electrode materials, which is applicable to the integrated device for carbonization, graphitization and crucible roasting of graphite negative electrode materials, and comprises the following steps: S1. Place the crucible blank into the containing cavity, put the graphite negative electrode raw material into the funnel, energize the heating layer, the heating layer heats the heating cavity, the temperature in the containing cavity rises, the graphite negative electrode raw material is carbonized, and the crucible blank is heated at the same time; S2. After heating for a period of time, the crucible blank is transformed into a crucible, the discharge valve is opened, and the carbonized graphite negative electrode raw material in the funnel enters the crucible; S3, using a pushing mechanism to push the crucible in the containing chamber into the heating chamber, placing a new crucible blank into the containing chamber, loading a new graphite negative electrode raw material into the funnel, energizing the heating layer, and heating the heating chamber to graphitize the graphite negative electrode material in the crucible in the heating chamber. At the same time, the temperature in the containing chamber is increased to carbonize the new graphite negative electrode raw material and heat the crucible blank at the same time; S4. After heating for a period of time, the graphite negative electrode material in the crucible in the heating chamber is graphitized, and the crucible in the heating chamber is taken out. At the same time, the crucible blank in the receiving chamber is transformed into a crucible, and the discharge valve is opened, and the carbonized graphite negative electrode raw material in the funnel enters the crucible; S5. Repeat steps S3-S4 until the process is completed.

[0015] Compared with the prior art, the integrated device and method for carbonizing, graphitizing and crucible roasting of graphite negative electrode materials provided by the present invention has the following beneficial effects: by opening a accommodating chamber in the thermal insulation layer, the temperature of the accommodating chamber is lower than that of the heating chamber, so that the graphitization process can be carried out in the heating chamber, and the carbonization of the graphite negative electrode material and the crucible roasting process can be carried out in the accommodating chamber, thereby realizing heating of objects with different target temperatures in partial areas of a furnace body, and at the same time, the carbonized graphite negative electrode material is automatically controlled to enter the roasted crucible through the discharge valve, and the crucible in the accommodating chamber is pushed into the heating chamber through the pushing mechanism, so that the carbonized graphite negative electrode material and the heated crucible in the accommodating chamber do not need to be taken out but can be directly pushed into the heating chamber, which can avoid cooling of the graphite negative electrode material and the crucible, reduce heat waste, and improve environmental protection benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an integrated device for carbonization, graphitization and crucible calcination of graphite negative electrode materials provided by one embodiment of the present invention; Figure 2 yes Figure 1 A partial enlarged view of the middle area A; Figure 3 yes Figure 1 A schematic diagram of the process of taking out the crucible from the integrated device for carbonization, graphitization and crucible roasting of graphite negative electrode materials; Figure 4 yes Figure 3 A schematic diagram of the process of the carbonized graphite negative electrode material entering the crucible in the integrated device for carbonization, graphitization and crucible roasting of the graphite negative electrode material; Figure 5 yes Figure 4 A schematic diagram of a process in which a crucible in a receiving chamber is pushed into a heating chamber in an integrated device for carbonization, graphitization and crucible roasting of a graphite negative electrode material; Figure 6 yes Figure 5 A schematic diagram of the process of loading a new crucible blank into a containing cavity in the integrated device for carbonizing, graphitizing and calcining a graphite negative electrode material; Explanation of the accompanying drawings: 1-furnace body, 11-insulation layer, 111-heating chamber, 112-accommodating chamber, 113-first through hole, 114-second through hole, 1141-first limit block, 115-third through hole, 1151-second limit block, 116-receiving groove, 12-heating layer, 13-first blocking block, 131-first handle, 14-second blocking block, 141-second handle, 15-stopper rod, 2-carbonization mechanism, 21-funnel, 22-discharge valve, 3-pushing mechanism, 31-pushing cylinder, 32-push rod, 33-push plate, 4-crucible blank, 41-crucible, 5-sealing mechanism, 51-sealing block, 52-lifting drive member, 521-lifting drive cylinder, 522-lifting rod. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] In order to solve the technical problem that the separate carbonization, graphitization and crucible roasting of graphite negative electrode materials lead to increased equipment cost and heat waste, the present invention provides an integrated device and method for carbonization, graphitization and crucible roasting of graphite negative electrode materials, which can realize the integrated carbonization, graphitization and crucible roasting of graphite negative electrode materials.

[0019] See also Figure 1 , Figure 1 This is a structural schematic diagram of an integrated device and method for carbonizing, graphitizing and crucible roasting of graphite negative electrode materials in one embodiment of the present invention. The integrated device and method for carbonizing, graphitizing and crucible roasting of graphite negative electrode materials includes a furnace body 1, a carbonization mechanism 2 and a driving mechanism 3.

[0020] See also Figure 1 and Figure 2 The furnace body 1 includes a heat preservation layer 11, a heating layer 12 and a first blocking block 13. The center of the heat preservation layer 11 has a heating cavity 111. A receiving cavity 112 is formed in the heat preservation layer 11. The receiving cavity 112 is used to place the crucible blank 4. The receiving cavity 112 is connected to the heating cavity 111 via a first through hole 113. The receiving cavity 112 is connected to the outside of the furnace body via a second through hole 114. The heating layer 12 is arranged in the heating cavity 111. The first blocking block 13 is used to be plugged in the second through hole 114. In this embodiment, a first handle 131 is formed on the first blocking block 13 to facilitate pushing and pulling the first blocking block 13. A first stopper 1141 is fixed to the inner edge of the second through hole 114. The first stopper 1141 is used to block and limit the first blocking block 13.

[0021] The carbonization mechanism 2 includes a funnel 21 and a discharge valve 22. The funnel 21 is used to load graphite negative electrode raw materials. One end of the discharge valve 22 is connected to the outlet of the funnel 21, and the other end of the discharge valve 22 is connected to the inlet of the crucible blank 4. The pushing mechanism 3 is used to push the crucible 41 in the heating chamber 111 into the heating chamber 111 .

[0022] When in use, the crucible blank 4 is placed in the accommodating chamber 112, the graphite negative electrode raw material is loaded into the funnel 21, the heating layer 12 is energized, the heating layer 12 heats the heating chamber 111, the temperature in the accommodating chamber 112 is also increased, the graphite negative electrode raw material is carbonized, and the crucible blank 4 is heated at the same time; after heating for a period of time, the crucible blank 4 is transformed into a crucible 41, the discharge valve 22 is opened, and the carbonized graphite negative electrode raw material in the funnel 21 enters the crucible 41; the pushing mechanism 3 is used to push the crucible 41 in the accommodating chamber 112 into the heating chamber 111, a new crucible blank 4 is placed in the accommodating chamber 112, and a new graphite negative electrode raw material is loaded. The graphite negative electrode material in the crucible 41 in the heating chamber 111 is graphitized, and at the same time, the temperature in the containing chamber 112 is increased, the new graphite negative electrode raw material is carbonized, and at the same time, the new crucible blank 4 is heated; after heating for a period of time, the graphitization of the graphite negative electrode material in the crucible 41 in the heating chamber 111 is completed, the crucible in the heating chamber 111 is taken out, and at the same time, the crucible blank 4 in the containing chamber 112 is transformed into the crucible 41, the discharge valve 22 is opened, and the carbonized graphite negative electrode raw material in the funnel 21 enters the crucible 41; the above steps are repeated until the process is completed.

[0023] The technical solution provided by the present invention is to open a accommodating chamber 112 in the insulation layer 11, and the temperature of the accommodating chamber 112 is lower than that of the heating chamber 111, so that the graphitization process can be carried out in the heating chamber 111, and the carbonization of the graphite negative electrode material and the crucible roasting process can be carried out in the accommodating chamber 112, so as to achieve heating of objects with different target temperatures in partial areas of a furnace body. At the same time, the carbonized graphite negative electrode material is automatically controlled to enter the roasted crucible 41 through the discharge valve 22, and the crucible 41 in the accommodating chamber 112 is pushed into the heating chamber 111 through the pushing mechanism 3, so that the carbonized graphite negative electrode material in the accommodating chamber 112 and the heated crucible 41 do not need to be taken out but can be directly pushed into the heating chamber 111, so that the cooling of the graphite negative electrode material and the crucible 41 can be avoided, heat waste can be reduced, and environmental protection benefits can be improved.

[0024] In one embodiment, see Figure 1 and Figure 3, the insulation layer 11 is also provided with a third through hole 115, and the third through hole 115 is connected to the heating chamber 111, and the furnace body 1 also includes a second blocking block 14, and the second blocking block 14 is used to be plugged in the third through hole 115. In this embodiment, a second handle 141 is formed on the second blocking block 14. A second limiting block 1151 is fixed to the lower edge of the third through hole 115, and the second limiting block 1151 is used to block and limit the second blocking block 14. During use, when it is necessary to take out the graphitized material, the second blocking block 14 can be raised to open the third through hole 115, and then the crucible 41 in the heating chamber 111 can be raised by the clamp.

[0025] In one embodiment, see Figure 1 , the heating layer 12 is a resistor material layer.

[0026] In one embodiment, see Figure 1 and Figure 2 The insulation layer 11 is also provided with a feed hole, the lower end of which is located directly above the feed port of the funnel 21. The furnace body 1 also includes a stopper rod, and the stopper rod 15 is used to be plugged in the feed hole. When in use, when it is necessary to load graphite negative electrode raw materials into the funnel 21, the stopper rod 15 is pulled out, and then the graphite negative electrode raw materials are loaded into the funnel 21 through the feed hole.

[0027] In one embodiment, see Figure 1 , a receiving groove 116 is provided on the inner wall of the first through hole 113; the graphite negative electrode material carbonization, graphitization and crucible roasting integrated device also includes a sealing mechanism 5, the sealing mechanism 5 includes a sealing block 51 and a lifting drive member 52, the sealing block 51 is movably arranged in the first through hole 113, the lifting drive member 52 is connected to the sealing block 51, and is used to drive the sealing block 51 to move up and down, so that the sealing block 51 is located in the first through hole 113 or in the receiving groove 116, and when the sealing block 51 is in the first through hole 113 or in the receiving groove 116, When hot, the sealing block 51 is located in the first through hole 113, thereby separating the heating chamber 111 and the accommodating chamber 112, so that the heating chamber 111 and the accommodating chamber 112 have a set temperature difference to ensure different temperatures required for different processes. When it is necessary to push the crucible 41 in the accommodating chamber 112 into the heating chamber 111, the sealing block 51 can be first pulled into the receiving groove 116 by the lifting drive member 52 to open the first through hole 113, thereby facilitating the crucible 41 in the accommodating chamber 112 to enter the heating chamber 111 through the first through hole 113.

[0028] In one embodiment, see Figure 1A socket connected to the receiving groove 116 is provided on the outer wall of the insulation layer 11; the lifting drive member 52 includes a lifting drive cylinder 521 and a lifting rod 522, the cylinder body of the lifting drive cylinder 521 is fixed outside the insulation layer 11, the output shaft of the lifting drive cylinder 521 is fixedly connected to one end of the lifting rod 522, and the other end of the lifting rod 522 is fixedly connected to the sealing block 51 after passing through the socket.

[0029] In one embodiment, see Figure 1 The first blocking block 13 is provided with a guide hole, the pushing mechanism 3 comprises a pushing cylinder 31, a push rod 32 and a push plate 33, the cylinder body of the pushing cylinder 31 is fixed to the first blocking block 13, the output shaft of the pushing cylinder 31 is fixedly connected to one end of the push rod 32, the other end of the push rod 32 passes through the guide hole and is fixedly connected to the push plate 33, and the push plate 33 is used to push the crucible 41. When in use, the pushing cylinder 31 drives the push plate 33 to move, thereby pushing the crucible 41 in the accommodating chamber 112 into the heating chamber 111.

[0030] The present invention also provides a method for integrating carbonization, graphitization and crucible roasting of graphite negative electrode materials, which is applicable to the integrated device for carbonization, graphitization and crucible roasting of graphite negative electrode materials, and comprises the following steps: S1, placing the crucible body 4 into the containing chamber 112, loading the graphite negative electrode raw material into the funnel 21, energizing the heating layer 12, the heating layer 12 heats the heating chamber 111, the temperature in the containing chamber 112 also rises, the graphite negative electrode raw material is carbonized, and the crucible body 4 is heated at the same time; S2, after heating for a period of time, the crucible blank 4 is transformed into the crucible 41, the discharge valve 22 is opened, and the carbonized graphite negative electrode raw material in the funnel 21 enters the crucible 41 (such as Figure 4 ); S3, using the pushing mechanism 3 to push the crucible 41 in the containing chamber 112 into the heating chamber 111 (such as Figure 5 ), place the new crucible blank 4 into the accommodating cavity 112 (such as Figure 6 ), put new graphite negative electrode raw materials into the funnel 21 (such as Figure 6 ), the heating layer 12 is energized, the heating layer 12 heats the heating chamber 111, and the graphite negative electrode material in the crucible 41 in the heating chamber 111 is graphitized. At the same time, the temperature in the containing chamber 112 is increased, the new graphite negative electrode raw material is carbonized, and the new crucible blank 4 is heated; S4, after heating for a period of time, the graphite negative electrode material in the crucible 41 in the heating chamber 111 is graphitized, and the crucible (such as Figure 3), at the same time, the crucible blank 4 in the accommodating chamber 112 is transformed into a crucible 41, the discharge valve 22 is opened, and the carbonized graphite negative electrode raw material in the funnel 21 enters the crucible 41 (such as Figure 4 ); S5. Repeat steps S3-S4 until the process is completed.

[0031] The technical solution provided by the present invention is to open a accommodating chamber 112 in the insulation layer 11, and the temperature of the accommodating chamber 112 is lower than that of the heating chamber 111, so that the graphitization process can be carried out in the heating chamber 111, and the carbonization of the graphite negative electrode material and the crucible roasting process can be carried out in the accommodating chamber 112, so as to achieve heating of objects with different target temperatures in partial areas of a furnace body. At the same time, the carbonized graphite negative electrode material is automatically controlled to enter the roasted crucible 41 through the discharge valve 22, and the crucible 41 in the accommodating chamber 112 is pushed into the heating chamber 111 through the pushing mechanism 3, so that the carbonized graphite negative electrode material in the accommodating chamber 112 and the heated crucible 41 do not need to be taken out but can be directly pushed into the heating chamber 111, so that the cooling of the graphite negative electrode material and the crucible 41 can be avoided, heat waste can be reduced, and environmental protection benefits can be improved.

[0032] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An integrated device for carbonization, graphitization and crucible roasting of graphite negative electrode materials, characterized in that: include: A furnace body, the furnace body comprising a heat preservation layer, a heating layer and a first blocking block, the heat preservation layer having a heating cavity at its center, a receiving cavity formed in the heat preservation layer, the receiving cavity being used to place a crucible blank, the receiving cavity being connected to the heating cavity via a first through hole, the receiving cavity being connected to the outside of the furnace body via a second through hole, the heating layer being arranged in the heating cavity, and the first blocking block being used to be plugged in the second through hole; A carbonization mechanism, the carbonization mechanism comprising a funnel and a discharge valve, the funnel is used to load graphite negative electrode raw materials, one end of the discharge valve is connected to the outlet of the funnel, and the other end of the discharge valve is connected to the inlet of the crucible blank; and, A pushing mechanism is used to push the crucible in the containing chamber into the heating chamber.

2. The integrated device for carbonization, graphitization and crucible calcination of graphite negative electrode materials according to claim 1, characterized in that: The heat-insulating layer is also provided with a third through hole, which is communicated with the heating chamber. The furnace body further comprises a second blocking block, which is used to be plugged in the third through hole.

3. The integrated device for carbonization, graphitization and crucible calcination of graphite negative electrode materials according to claim 1, characterized in that: The heating layer is a resistor material layer.

4. The integrated device for carbonization, graphitization and crucible calcination of graphite negative electrode materials according to claim 1, characterized in that: A feed hole is also provided on the heat-insulating layer, and the lower end of the feed hole is located just above the feed port of the funnel.

5. The integrated device for carbonization, graphitization and crucible calcination of graphite negative electrode materials according to claim 4, characterized in that: The furnace body further comprises a stopper rod, and the stopper rod is used to be plugged in the feed hole.

6. The integrated device for carbonization, graphitization and crucible calcination of graphite negative electrode materials according to claim 1, characterized in that: A receiving groove is provided on the inner wall of the first through hole; The integrated device for carbonization, graphitization and crucible roasting of graphite negative electrode materials also includes a sealing mechanism, which includes a sealing block and a lifting drive component. The sealing block is movably arranged in the first through hole. The lifting drive component is connected to the sealing block and is used to drive the sealing block to move up and down so that the sealing block is located in the first through hole or in the receiving groove.

7. The integrated device for carbonization, graphitization and crucible calcination of graphite negative electrode materials according to claim 6, characterized in that: The outer wall of the thermal insulation layer is provided with a plug hole connected to the receiving groove; The lifting drive component includes a lifting drive cylinder and a lifting rod. The cylinder body of the lifting drive cylinder is fixed outside the insulation layer. The output shaft of the lifting drive cylinder is fixedly connected to one end of the lifting rod. The other end of the lifting rod passes through the socket and is fixedly connected to the sealing block.

8. The integrated device for carbonization, graphitization and crucible calcination of graphite negative electrode materials according to claim 1, characterized in that: A guide hole is provided on the first blocking block, and the pushing mechanism includes a pushing cylinder, a push rod and a push plate. The cylinder body of the pushing cylinder is fixed to the first blocking block, the output shaft of the pushing cylinder is fixedly connected to one end of the push rod, and the other end of the push rod is fixedly connected to the push plate after passing through the guide hole, and the push plate is used to push the crucible.

9. The integrated device for carbonization, graphitization and crucible calcination of graphite negative electrode materials according to claim 1, characterized in that: A first handle is formed on the first blocking block.

10. A method for integrating carbonization, graphitization and crucible roasting of graphite negative electrode materials, characterized in that: The device is applicable to the integrated device for carbonization, graphitization and crucible roasting of graphite negative electrode materials as claimed in any one of claims 1 to 9, and comprises the following steps: S1. Place the crucible blank into the containing cavity, put the graphite negative electrode raw material into the funnel, energize the heating layer, the heating layer heats the heating cavity, the temperature in the containing cavity rises, the graphite negative electrode raw material is carbonized, and the crucible blank is heated at the same time; S2. After heating for a period of time, the crucible blank is transformed into a crucible, the discharge valve is opened, and the carbonized graphite negative electrode raw material in the funnel enters the crucible; S3, using a pushing mechanism to push the crucible in the containing chamber into the heating chamber, placing a new crucible blank into the containing chamber, loading a new graphite negative electrode raw material into the funnel, energizing the heating layer, and heating the heating chamber to graphitize the graphite negative electrode material in the crucible in the heating chamber. At the same time, the temperature in the containing chamber is increased to carbonize the new graphite negative electrode raw material and heat the crucible blank at the same time; S4. After heating for a period of time, the graphite negative electrode material in the crucible in the heating chamber is graphitized, and the crucible in the heating chamber is taken out. At the same time, the crucible blank in the receiving chamber is transformed into a crucible, and the discharge valve is opened, and the carbonized graphite negative electrode raw material in the funnel enters the crucible; S5. Repeat steps S3-S4 until the process is completed.

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