Manufacturing method of carbon fiber crucible for high-temperature treatment of negative electrode carbon

Abstract

The invention discloses a manufacturing method of a carbon fiber crucible for high-temperature treatment of negative electrode carbon. The manufacturing method comprises the following steps: heating and melting a certain amount of asphalt in a heating container; uniformly mixing the molten asphalt with graphite and carbon fibers; pouring the uniformly mixed mixture of the graphite, the carbon fibers and the asphalt into a mold, extruding the mixture through a press machine, and forming to obtain a carbon fiber crucible blank; and putting the crucible blank into a graphitization furnace for heating and curing. Compared with the prior art, the manufacturing method and device of the carbon fiber crucible for the high-temperature treatment of the negative electrode carbon have the beneficial effects that the mixture of the graphite, the carbon fibers and the asphalt which are uniformly mixed is used as a main raw material of the carbon fiber crucible, and the carbon fibers can play a role in improving the structural strength of the crucible; the service life of the crucible can be prolonged, and the production cost of the graphitization process is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of crucibles, and in particular to a method for manufacturing a carbon fiber crucible used for high-temperature treatment of negative electrode carbon. Background Art

[0002] High temperature treatment of negative electrode carbon is an important part of the preparation process of negative electrode materials, mainly involving carbonization and graphitization processes. Carbonization refers to the process of decomposing negative electrode materials into carbon-based compounds in a high temperature environment (usually in the range of 700-1200°C). This process mainly increases the carbon content in the material by evaporating or dissolving the non-carbon elements in the material, thereby improving its conductivity. For some negative electrode materials, such as artificial graphite negative electrode materials, it is necessary to perform a higher temperature treatment after carbonization, that is, the graphitization process. Graphitization refers to the treatment of negative electrode materials at a high temperature of nearly 3000°C to form a graphitized structure.

[0003] Both the carbonization and graphitization processes require the negative electrode carbon material to be loaded into a crucible and then heated in a high-temperature furnace. Due to the high temperature of the graphitization process, a general graphite crucible will break after 4-6 uses, increasing production costs. Summary of the invention

[0004] The purpose of the present invention is to overcome the above technical deficiencies and propose a method for manufacturing a carbon fiber crucible for high temperature treatment of negative electrode carbon, so as to solve the technical problem that the strength of general graphite crucibles in the prior art cannot meet the requirements of the graphitization process, resulting in a short service life.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: The present invention provides a method for manufacturing a carbon fiber crucible for high temperature treatment of negative electrode carbon, comprising: Put a certain amount of asphalt into a heating container and heat it to melt; Mix the melted asphalt with graphite and carbon fiber; Pour the mixed mixture of graphite, carbon fiber and asphalt into a mold, and extrude the mixture through a press to obtain a carbon fiber crucible blank; The crucible blank is placed in a graphitization furnace for heating and solidification.

[0006] In some embodiments, the mixing ratio of graphite, carbon fiber and pitch is 65:5:30.

[0007] In some embodiments, the specific method of mixing the melted asphalt with graphite and carbon fiber includes: A mixer is provided, the mixer comprising a mixing shell, a chute, a first feeding mechanism and a second feeding mechanism, the lower end of the mixing shell is provided with a discharge port, the chute is tilted and fixed in the mixing shell, the first feeding mechanism is arranged above the chute and used to feed graphite to the chute, and the second feeding mechanism is arranged above the chute and used to feed carbon fiber to the chute; The melted asphalt is passed into the upper end of the chute, and the melted asphalt flows downward along the chute. At the same time, graphite is fed into the chute through the first feeding mechanism, and carbon fiber is fed into the chute through the second feeding mechanism, so as to mix the melted asphalt with graphite and carbon fiber, and the mixed mixture is discharged from the discharge port into the mold.

[0008] In some embodiments, the first feeding mechanism includes a first feeding shell, a first turntable and a first rotating driving member, the first feeding shell is fixed to the mixing shell and is located above the chute, a first feeding port is provided at the upper end of the first feeding shell, a first dropping port is provided at the lower end of the first feeding shell, the first turntable is rotatably arranged in the first feeding shell, a plurality of first accommodating grooves are formed on the outer side wall of the first turntable, and the first rotating driving member is connected to the first turntable and is used to drive the first turntable to rotate.

[0009] In some embodiments, the first feeding mechanism further includes a first rotating shaft, the first rotating shaft is rotatably disposed on the first feeding shell, and the first turntable is fixed on the first rotating shaft.

[0010] In some embodiments, the first rotating driving member includes a first rotating driving motor, a first driving sprocket, a first driven sprocket and a first chain, the first driving sprocket is fixedly mounted on the output shaft of the first rotating driving motor, the first driven sprocket is fixedly mounted on the first rotating shaft, the first chain is closed, one end of the first chain is wound around the first driving sprocket, and the other end of the first chain is wound around the first driven sprocket.

[0011] In some embodiments, the second feeding mechanism includes a second feeding shell, a second turntable and a second rotating drive member, the second feeding shell is fixed to the mixing shell and is located above the chute, the upper end of the second feeding shell is provided with a second feeding port, the lower end of the second feeding shell is provided with a second drop port, the second turntable is rotatably arranged in the second feeding shell, a plurality of second accommodating grooves are formed on the outer side wall of the second turntable, and the second rotating drive member is connected to the second turntable and is used to drive the second turntable to rotate.

[0012] In some embodiments, the second feeding mechanism further comprises a second rotating shaft, the second rotating shaft is rotatably disposed on the second feeding housing, and the second rotating disk is fixed on the second rotating shaft; The second rotating driving member includes a second rotating driving motor, a second driving sprocket, a second driven sprocket and a second chain, the second driving sprocket is fixedly sleeved on the output shaft of the second rotating driving motor, the second driven sprocket is fixedly sleeved on the second rotating shaft, the second chain is closed, one end of the second chain is wound around the second driving sprocket, and the other end of the second chain is wound around the second driven sprocket.

[0013] In some embodiments, the mixer further comprises a feed hopper, wherein an outlet of the feed hopper is located above an upper end of the chute.

[0014] In some embodiments, the discharge port is provided with a discharge valve.

[0015] Compared with the prior art, the beneficial effect of the method and device for making a carbon fiber crucible for high-temperature treatment of negative electrode carbon provided by the present invention is: by using the mixed mixture of graphite, carbon fiber and asphalt as the main raw material of the carbon fiber crucible, wherein the carbon fiber can increase the structural strength of the crucible, thereby extending the service life of the crucible and reducing the production cost of the graphitization process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a process schematic diagram of step S1 of a method for manufacturing a carbon fiber crucible for high temperature treatment of negative electrode carbon provided by one embodiment of the present invention; Figure 2 1 is a process schematic diagram of step S2 of a method for manufacturing a carbon fiber crucible for high temperature treatment of negative electrode carbon provided by one embodiment of the present invention; Figure 3 1 is a process schematic diagram of step S3 of a method for manufacturing a carbon fiber crucible for high temperature treatment of negative electrode carbon provided by one embodiment of the present invention; Figure 4 is a structural schematic diagram of a mixer provided by one embodiment of the present invention; Figure 5 yes Figure 4 A schematic structural diagram of the first feeding mechanism in FIG. Figure 6 yes Figure 4 A schematic diagram of the structure of the second feeding mechanism; Description of the accompanying drawings: 1-heating container, 2-mold, 3-pressing machine, 4-crucible blank, 5-mixer, 51-mixing shell, 511-discharging port, 512-discharging valve, 52-chute, 53-first feeding mechanism, 531-first feeding shell, 5311-first feeding port, 5312-first dropping port, 532-first turntable, 5321-first containing tank, 533-first rotating driving member, 5331-first rotating driving motor, 5332-first driving sprocket, 5 333-first driven sprocket, 5334-first chain, 534-first rotating shaft, 54-second feeding mechanism, 541-second feeding shell, 5411-second feeding port, 5412-second dropping port, 542-second turntable, 5421-second accommodating slot, 543-second rotating drive member, 5431-second rotating drive motor, 5432-second driving sprocket, 5433-second driven sprocket, 5434-second chain, 544-second rotating shaft, 55-feeding funnel. 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 strength of general graphite crucibles cannot meet the requirements of the graphitization process, resulting in a short service life, the present invention provides a method for making a carbon fiber crucible for high-temperature treatment of negative electrode carbon, which can increase the structural strength of the crucible and extend its service life.

[0019] It should be noted that the method for making a carbon fiber crucible for high-temperature treatment of negative electrode carbon described in the present invention is used for but not limited to high-temperature treatment of negative electrode carbon, etc. For the convenience of explanation, in the present invention, only the method for making a carbon fiber crucible for high-temperature treatment of negative electrode carbon is applied to high-temperature treatment equipment of negative electrode carbon as an example for explanation, and the principle of applying the method for making a carbon fiber crucible for high-temperature treatment of negative electrode carbon to other types of equipment is substantially the same as the principle applied to high-temperature treatment equipment of negative electrode carbon, which will not be elaborated here.

[0020] See also Figure 1 , Figure 1 The present invention is a structural schematic diagram of a method for manufacturing a carbon fiber crucible for high temperature treatment of negative electrode carbon in one embodiment of the present invention. The method for manufacturing a carbon fiber crucible for high temperature treatment of negative electrode carbon includes: S1, putting a certain amount of asphalt into a heating container 1 to heat and melt; S2, mixing the melted asphalt with graphite and carbon fiber; S3, pouring the mixed mixture of graphite, carbon fiber and asphalt into a mold 2, and extruding the mixture through a press 3 to obtain a carbon fiber crucible blank 4; S4, placing the crucible blank 4 into a graphitization furnace for heating and curing.

[0021] In the present invention, a mixture of graphite, carbon fiber and asphalt is used as the main raw material of a carbon fiber crucible, wherein the carbon fiber can increase the structural strength of the crucible, extend the service life of the crucible, and reduce the production cost of the graphitization process.

[0022] In one embodiment, see Figure 2 , the mixing ratio of graphite, carbon fiber and asphalt is 65:5:30. Under this ratio, the structural strength of the crucible is optimal.

[0023] In one embodiment, see Figure 4 In step S2, the specific method of mixing the melted asphalt with graphite and carbon fiber includes: S21, providing a mixer 5, the mixer 5 comprising a mixing shell 51, a chute 52, a first feeding mechanism 53 and a second feeding mechanism 54, the lower end of the mixing shell 51 is provided with a discharge port 511, the chute 52 is tilted and fixed in the mixing shell 51, the first feeding mechanism 53 is arranged above the chute 52 and is used to feed graphite to the chute 52, the second feeding mechanism 54 is arranged above the chute 52 and is used to feed carbon fiber to the chute 52; S22, the melted asphalt is passed into the upper end of the chute 52, and the melted asphalt flows downward along the chute 52. At the same time, graphite is fed into the chute 52 through the first feeding mechanism 53, and carbon fiber is fed into the chute 52 through the second feeding mechanism 54, so as to mix the melted asphalt with graphite and carbon fiber, and the mixed mixture is discharged from the discharge port 511 into the mold 2.

[0024] In the prior art, materials are usually mixed by a stirring device. However, for carbon fiber, the stirring process of the stirring device may cause the carbon fiber to break, affecting the structural strength of the carbon fiber crucible. In the present embodiment, by mixing graphite and carbon fiber into asphalt during the flow of asphalt, graphite and carbon fiber can be evenly mixed into the asphalt without the aid of a stirring device, the carbon fiber will not break, and the structural strength of the carbon fiber crucible can be increased.

[0025] In one embodiment, see Figure 4 and Figure 5The first feeding mechanism 53 includes a first feeding shell 531, a first turntable 532 and a first rotating driving member 533. The first feeding shell 531 is fixed to the mixing shell 51 and is located above the chute 52. A first feeding port 5311 is provided at the upper end of the first feeding shell 531, and a first drop port 5312 is provided at the lower end of the first feeding shell 531. The first turntable 532 is rotatably arranged in the first feeding shell 531. A plurality of first accommodating grooves 5321 are formed on the outer side wall of the first turntable 532. The first rotating driving member 533 is connected to the first turntable 532 and is used to drive the first turntable 532 to rotate. In this embodiment, graphite is loaded into the first feed port 5311, and the first turntable 532 is driven to rotate by the first rotating driving member 533. When a first receiving groove 5321 of the first turntable 532 rotates to the bottom of the first feed port 5311, the graphite in the first feed port 5311 falls into the first receiving groove 5321. Subsequently, when the first receiving groove 5321 moves to above the first drop port 5312, the graphite in the first receiving groove 5321 is discharged from the first drop port 5312. The discharge speed of the graphite can be controlled by controlling the rotation speed of the first rotating driving member 533.

[0026] In one embodiment, see Figure 4 and Figure 5 The first feeding mechanism 53 also includes a first rotating shaft 534 , which is rotatably disposed on the first feeding shell 531 , and the first turntable 532 is fixed on the first rotating shaft 534 .

[0027] In one embodiment, see Figure 4 and Figure 5 The first rotating driving member 533 includes a first rotating driving motor 5331, a first driving sprocket 5332, a first driven sprocket 5333 and a first chain 5334. The first driving sprocket 5332 is fixedly sleeved on the output shaft of the first rotating driving motor 5331, the first driven sprocket 5333 is fixedly sleeved on the first rotating shaft 534, the first chain 5334 is closed, one end of the first chain 5334 is wound around the first driving sprocket 5332, and the other end of the first chain 5334 is wound around the first driven sprocket 5333. When in use, the first rotating driving motor 5331 drives the first driving sprocket 5332 to rotate, the first driving sprocket 5332 drives the first driven sprocket 5333 to rotate via the first chain 5334, the first driven sprocket 5333 drives the first rotating shaft 534 to rotate, and the first rotating shaft 534 drives the first rotating disk 532 to rotate.

[0028] In one embodiment, see Figure 4 and Figure 6The second feeding mechanism 54 includes a second feeding shell 541, a second turntable 542 and a second rotating driving member 543. The second feeding shell 541 is fixed to the mixing shell 51 and is located above the chute 52. A second feeding port 5411 is provided at the upper end of the second feeding shell 541, and a second drop port 5412 is provided at the lower end of the second feeding shell 541. The second turntable 542 is rotatably arranged in the second feeding shell 541. A plurality of second accommodating grooves 5421 are formed on the outer side wall of the second turntable 542. The second rotating driving member 543 is connected to the second turntable 542 and is used to drive the second turntable 542 to rotate. In this embodiment, carbon fiber is loaded into the second feed port 5411, and the second turntable 542 is driven to rotate by the second rotating driving member 543. When a second receiving groove 5421 of the second turntable 542 rotates to below the second feed port 5411, the graphite in the second feed port 5411 falls into the second receiving groove 5421. Subsequently, when the second receiving groove 5421 moves to above the second drop port 5412, the graphite in the second receiving groove 5421 is discharged from the second drop port 5412. The discharge speed of the graphite can be controlled by controlling the rotation speed of the second rotating driving member 543.

[0029] In one embodiment, see Figure 4 and Figure 6 The second feeding mechanism 54 also includes a second rotating shaft 544 , which is rotatably disposed on the second feeding shell 541 , and the second turntable 542 is fixed on the second rotating shaft 544 .

[0030] The second rotation driving member 543 includes a second rotation driving motor 5431, a second driving sprocket 5432, a second driven sprocket 5433 and a second chain 5434. The second driving sprocket 5432 is fixedly sleeved on the output shaft of the second rotation driving motor 5431, the second driven sprocket 5433 is fixedly sleeved on the second rotating shaft 544, the second chain 5434 is closed, one end of the second chain 5434 is wound around the second driving sprocket 5432, and the other end of the second chain 5434 is wound around the second driven sprocket 5433. When in use, the second rotation driving motor 5431 drives the second driving sprocket 5432 to rotate, the second driving sprocket 5432 drives the second driven sprocket 5433 to rotate via the second chain 5434, the second driven sprocket 5433 drives the second rotating shaft 544 to rotate, and the second rotating shaft 544 drives the second turntable 542 to rotate.

[0031] In one embodiment, see Figure 4The mixer 5 further comprises a feed hopper 55 , the outlet of which is located above the upper end of the chute 52 . When in use, molten asphalt is added through the feed hopper 55 .

[0032] In one embodiment, see Figure 4 The discharge port 511 is provided with a discharge valve 512, so as to be used to control the discharge speed. In the present invention, a mixture of graphite, carbon fiber and asphalt is used as the main raw material of a carbon fiber crucible, wherein the carbon fiber can increase the structural strength of the crucible, extend the service life of the crucible, and reduce the production cost of the graphitization process.

[0033] 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. A method for making a carbon fiber crucible for high temperature treatment of negative electrode carbon, characterized in that: include: Put a certain amount of asphalt into a heating container and heat it to melt; Mix the melted asphalt with graphite and carbon fiber; Pour the mixed mixture of graphite, carbon fiber and asphalt into a mold, and extrude the mixture through a press to obtain a carbon fiber crucible blank; The crucible blank is placed in a graphitization furnace for heating and solidification.

2. The method for manufacturing a carbon fiber crucible for high temperature treatment of negative electrode carbon according to claim 1, characterized in that: The mixing ratio of graphite, carbon fiber and asphalt is 65:5:

30.

3. The method for manufacturing a carbon fiber crucible for high temperature treatment of negative electrode carbon according to claim 1, characterized in that: The specific method of mixing the melted asphalt with graphite and carbon fiber includes: A mixer is provided, the mixer comprising a mixing shell, a chute, a first feeding mechanism and a second feeding mechanism, the lower end of the mixing shell is provided with a discharge port, the chute is tilted and fixed in the mixing shell, the first feeding mechanism is arranged above the chute and used to feed graphite to the chute, and the second feeding mechanism is arranged above the chute and used to feed carbon fiber to the chute; The melted asphalt is passed into the upper end of the chute, and the melted asphalt flows downward along the chute. At the same time, graphite is fed into the chute through the first feeding mechanism, and carbon fiber is fed into the chute through the second feeding mechanism, so as to mix the melted asphalt with graphite and carbon fiber, and the mixed mixture is discharged from the discharge port into the mold.

4. The method for manufacturing a carbon fiber crucible for high temperature treatment of negative electrode carbon according to claim 1, characterized in that: The first feeding mechanism includes a first feeding shell, a first turntable and a first rotating driving member. The first feeding shell is fixed to the mixing shell and is located above the chute. A first feeding port is provided at the upper end of the first feeding shell, and a first dropping port is provided at the lower end of the first feeding shell. The first turntable is rotatably arranged in the first feeding shell, and a plurality of first accommodating grooves are formed on the outer side wall of the first turntable. The first rotating driving member is connected to the first turntable and is used to drive the first turntable to rotate.

5. The method for manufacturing a carbon fiber crucible for high temperature treatment of negative electrode carbon according to claim 4, characterized in that: The first feeding mechanism also includes a first rotating shaft, which is rotatably disposed on the first feeding shell, and the first turntable is fixed on the first rotating shaft.

6. The method for manufacturing a carbon fiber crucible for high temperature treatment of negative electrode carbon according to claim 5, characterized in that: The first rotating driving component includes a first rotating driving motor, a first driving sprocket, a first driven sprocket and a first chain. The first driving sprocket is fixedly mounted on the output shaft of the first rotating driving motor, the first driven sprocket is fixedly mounted on the first rotating shaft, and the first chain is closed. One end of the first chain is wound around the first driving sprocket, and the other end of the first chain is wound around the first driven sprocket.

7. The method for manufacturing a carbon fiber crucible for high temperature treatment of negative electrode carbon according to claim 1, characterized in that: The second feeding mechanism includes a second feeding shell, a second turntable and a second rotating driving member. The second feeding shell is fixed to the mixing shell and is located above the chute. A second feeding port is provided at the upper end of the second feeding shell, and a second dropping port is provided at the lower end of the second feeding shell. The second turntable is rotatably arranged in the second feeding shell, and a plurality of second accommodating grooves are formed on the outer side wall of the second turntable. The second rotating driving member is connected to the second turntable and is used to drive the second turntable to rotate.

8. The method for manufacturing a carbon fiber crucible for high temperature treatment of negative electrode carbon according to claim 7, characterized in that: The second feeding mechanism further includes a second rotating shaft, the second rotating shaft is rotatably disposed on the second feeding housing, and the second rotating disk is fixed on the second rotating shaft; The second rotating driving member includes a second rotating driving motor, a second driving sprocket, a second driven sprocket and a second chain, the second driving sprocket is fixedly sleeved on the output shaft of the second rotating driving motor, the second driven sprocket is fixedly sleeved on the second rotating shaft, the second chain is closed, one end of the second chain is wound around the second driving sprocket, and the other end of the second chain is wound around the second driven sprocket.

9. The method for manufacturing a carbon fiber crucible for high temperature treatment of negative electrode carbon according to claim 1, characterized in that: The mixer further comprises a feed hopper, the outlet of which is located above the upper end of the chute.

10. The method for manufacturing a carbon fiber crucible for high temperature treatment of negative electrode carbon according to claim 1, characterized in that: The discharge port is provided with a discharge valve.

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