A Short-Process Method for Preparing High-Performance Isostatic Graphite

Abstract

This application relates to a short-process method for preparing high-performance isostatic graphite, belonging to the technical field of isostatic graphite. The method includes the following steps: a batching step, a hot mixing step, a cold mixing step, a secondary grinding step, a forming step, a calcination step, an impregnation step, a graphitization step, and a purification step. In the calcination step, a suction device and a filtration device are included. The filtration device includes a filtration mechanism and a sediment-containing cavity. The suction device is used to suction silica sand, and the filtration mechanism is used to filter the suctioned silica sand. The agglomerated material is located within the sediment-containing cavity. This application has the advantage of facilitating the removal of agglomerated silica sand.

Description

Technical Field

[0001] This application relates to the technical field of isostatic graphite, and in particular to a short-process method for preparing high-performance isostatic graphite. Background Technology

[0002] Isostatic graphite is made by pressing high-purity graphite. Isostatic graphite is a new product that has been developed internationally over the past 50 years and is closely linked to today's high technology.

[0003] In the production of isostatic graphite, a calcination process is required. In this process, different blanks are placed in a ring-shaped calcination furnace, and 2-4mm of silica sand is filled around the furnace as support and insulation. After exiting the furnace, some of the silica sand is transported to the batching section for later use by a suction device. However, due to impurities in the silica sand, some of it caking occurs during the calcination process, affecting its reuse. Summary of the Invention

[0004] To address the shortcomings of existing technologies, one of the objectives of this application is to provide a short-process method for preparing high-performance isostatic graphite, which has the advantage of facilitating the removal of caking silica sand.

[0005] The above-mentioned objective of this application is achieved through the following technical solution:

[0006] A short-process method for preparing high-performance isostatic graphite includes the following steps: a batching step, a hot mixing step, a cold mixing step, a secondary grinding step, a molding step, a calcination step, an impregnation step, a graphitization step, and a purification step. The calcination step includes a suction device and a filtration device. The filtration device includes a filtration mechanism and a sediment-containing cavity. The suction device is used to suction silica sand, and the filtration mechanism is used to filter the suctioned silica sand. The agglomerated material is located within the sediment-containing cavity.

[0007] By adopting the above technical solution, the silica sand can be filtered during use, thereby removing the caking silica sand and reducing the impact of the caking material on the reuse of silica sand.

[0008] In a preferred embodiment, the present application may be further configured such that the filtering device further includes a crushing mechanism located within the impurity-receiving cavity. The crushing mechanism includes a mesh plate, a crushing plate, and a driving member. The mesh plate is located within the impurity-receiving cavity and divides the impurity-receiving cavity into an upper cavity and a lower cavity. The driving member is located within the upper cavity and is used to drive the crushing plate to move toward the mesh plate.

[0009] By adopting the above technical solution, the presence of the compaction mechanism enables the compaction of the material on the mesh plate, thereby dispersing the relatively loose material under the action of the compaction plate, which facilitates the reuse of silica sand.

[0010] In a preferred embodiment, the present application may be further configured such that the filtration device also includes a control system, the control system including a control module, a prompting module and a detection module, the detection module being used to detect the properties of the silica sand in the lower chamber, and if qualified, sending a qualified signal to the control module, the control module controlling the suction device to transfer the silica sand in the lower chamber to the feeding section after receiving the qualified signal.

[0011] By adopting the above technical solution, after the silica sand in the lower cavity is filtered by the mesh plate, it is inspected. If the requirement for composite reuse is met, the qualified silica sand is transferred.

[0012] In a preferred embodiment, the control system further includes a measurement module, and the discharge port is provided on the impurity chamber. The discharge port is connected to the upper chamber. Uncrushed agglomerated material is discharged from the discharge port to the measurement module. The measurement module weighs the agglomerated material and sends the weighing value to the control module. After receiving the weighing value, the control module makes a judgment. When the weighing value is not less than the standard value, it sends a prompt signal to the prompting unit. After receiving the prompt signal, the prompting unit provides a prompt.

[0013] By adopting the above technical solution, when caking occurs, if the weight of the caking is greater than or equal to the standard value, it indicates that the silica sand is abnormal and the amount of caking has increased. Therefore, it is necessary to remind the operators.

[0014] In a preferred embodiment, this application can be further configured such that: the filtering device further includes a second screen, and the control system includes a transfer module. When the weighing value is not less than the standard value, the control module sends a second screening signal to the transfer module. The transfer module transfers the material from the measuring module to the second screen, and after screening, the transfer module transfers the material after the second screening to the measuring module for a second measurement. The measuring module sends the second weighing data to the control module. The control module compares the two weighing data. If they are not equal, it sends a blockage signal to the prompting unit. Upon receiving the blockage signal, the prompting unit provides a blockage prompt.

[0015] By adopting the above technical solution, the agglomerated material is screened twice through the setting of two screens. When the weight of the agglomerated material after the second screening is inconsistent with the weight of the agglomerated material before screening, it indicates that some silica sand passed through the screening process during the second screening, and therefore some mesh holes of the screen plate are blocked.

[0016] In a preferred embodiment, this application can be further configured as follows: the suction device includes a suction pipe, an airflow measuring instrument is installed on the suction pipe, the control module periodically sends a suction signal to the suction device, the suction device performs suction, the airflow measuring instrument sends the detected data to the control module, the control module compares the detected data with standard data, and if they are different, sends a verification signal to the prompting module, and the prompting module provides a verification prompt after receiving the verification signal.

[0017] By adopting the above technical solution, when the suction device is in operation, the gas enters from the upper chamber to the lower chamber and then into the suction pipe. Therefore, by measuring the air volume entering the suction pipe, the condition of the mesh plate can be detected.

[0018] In a preferred embodiment, the present application may be further configured such that: the suction device includes a material pipe and a main pipe, the main pipe is vertically arranged, the suction pipe is bent and both ends are connected to the main pipe, and the suction pipe is also provided with a solenoid valve.

[0019] By adopting the above technical solution, the air volume measuring instrument is installed on the suction pipe during use, which can effectively reduce the damage of silica sand to the air volume measuring instrument.

[0020] In a preferred embodiment, this application can be further configured as follows: if the detected data is greater than the standard data, a damage signal is sent to the prompting module, and the prompting module provides a damage prompt upon receiving the damage signal; if the detected data is less than the standard data, a blockage signal is sent to the prompting module, and the prompting module provides a blockage prompt upon receiving the blockage signal.

[0021] By adopting the above technical solution, when the air volume is greater than the standard data, the surface mesh plate is damaged; when the air volume is less than the standard data, it indicates that the mesh plate is blocked. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the crushing mechanism structure of this application.

[0023] Figure 2 This is a schematic diagram of the control system principle of this application.

[0024] Reference numerals: 11. Upper cavity; 12. Lower cavity; 13. Driving component; 14. Compactor plate; 15. Mesh plate; 16. Main pipe; 17. Suction pipe; 21. Control module; 22. Detection module; 23. Measurement module; 24. Indication module; 25. Transfer module; 26. Suction device. Detailed Implementation

[0025] The present application will be further described in detail below with reference to the accompanying drawings.

[0026] Reference Figure 1 and Figure 2 This application discloses a short-process method for preparing high-performance isostatic graphite, comprising the following steps: a batching step, a hot mixing step, a cold mixing step, a secondary grinding step, a molding step, a calcination step, an impregnation step, a graphitization step, and a purification step. In the calcination step, a suction device 26 and a filtration device are included. The filtration device includes a control system, a filtration mechanism, a filtration chamber, a rolling mechanism, and a two-screening mechanism. The suction device 26 is used to suction silica sand, and the filtration mechanism is used to filter the suctioned silica sand. The agglomerated material is located in the filtration chamber.

[0027] The compaction mechanism is located within the impurity chamber and includes a screen plate 15, a compaction plate 14, and a drive component 13. In this embodiment, the drive component 13 can be a hydraulic cylinder, an electric push rod, or a linear module. The screen plate 15 is located within the impurity chamber and divides the impurity chamber into an upper chamber 11 and a lower chamber 12. The drive component 13 is located within the upper chamber 11 and is used to drive the compaction plate 14 to move toward the screen plate 15. The secondary screening mechanism includes two screening cylinders and two screening screens, with the two screening screens located within the two screening cylinders. The secondary screening mechanism can be a vibrating screen.

[0028] The suction device 26 includes a fan, a suction pipe 17, and a main pipe 16. The fan and the main pipe 16 are connected. The main pipe 16 is vertically arranged and connected to the lower cavity 12. The suction pipe 17 is curved, for example, it can be a right-angled U-shape. Both ends of the suction pipe 17 are connected to the main pipe 16 via electromagnetic three-way valves. An airflow measuring instrument is also installed on the suction pipe 17.

[0029] The control system includes a control module 21, a measurement module 23, a transfer module 25, a prompting module 24, and a detection module 22. The detection module 22 is used to detect the properties of the silica sand in the lower chamber 12. If it is qualified, the detection module responds to the operator's control and sends a qualified signal to the control module 21. After receiving the qualified signal, the control module 21 controls the suction device 26 to transfer the silica sand in the lower chamber 12 to the batching section.

[0030] The impurity chamber is also equipped with a discharge port, which is connected to the upper chamber 11. Uncrushed agglomerated material is discharged from the discharge port to the measuring module 23. The measuring module 23 weighs the agglomerated material and sends the weighing value to the control module 21. After receiving the weighing value, the control module 21 makes a judgment. When the weighing value is not less than the standard value, it indicates that the sieving of the screen plate 15 is abnormal. Therefore, the measuring module 23 sends a prompt signal to the prompting unit. After receiving the prompt signal, the prompting unit provides a prompt.

[0031] When the weighing value is not less than the standard value, the control module 21 sends a second screening signal to the transfer module 25. The transfer module 25 can be a smart terminal carried by the operator. After receiving the second screening signal, the operator transfers the material from the measuring module 23 to the second screening screen. In other embodiments, the transfer module 25 can also be a robotic arm or other equipment capable of material conveying and transfer. After screening, the transfer module 25 transfers the second-screened material to the measuring module 23 for a second measurement. The measuring module 23 sends the second weighing data to the control module 21. The control module 21 compares the two weighing data. If they are not equal, it sends a comparison signal to the suction device 26. The suction device 26 performs suction, and the air volume measuring instrument sends the detected data to the control module 21. The control module 21 compares the detected data with the standard data. If the detected data is less than the standard data, it sends a blockage signal to the prompt module 24. After receiving the blockage signal, the prompt module 24 provides a blockage prompt. If the detected data is not less than the standard data, an abnormal signal is sent to the prompting module 24. After receiving the abnormal signal, the prompting module 24 will issue an abnormal prompt.

[0032] The control module 21 periodically sends a suction signal to the suction device 26, which then performs suction. The airflow meter sends the detected data to the control module 21, which compares the detected data with the standard data. If the detected data is greater than the standard data, a damage signal is sent to the prompting module 24, which then issues a damage warning upon receiving the signal. If the detected data is less than the standard data, a blockage signal is sent to the prompting module 24, which then issues a blockage warning upon receiving the signal.

[0033] The implementation principle of this embodiment is as follows: After calcination, the silica sand is transferred to the upper chamber 11. Under the action of the mesh plate 15, the silica sand that meets the requirements will enter the lower chamber 12. Then, the rolling mechanism rolls the slab on the mesh plate 15. The remaining slab will then enter the measuring module 23 through the discharge hole for weighing. When the weight does not meet the requirements, the slab will be weighed a second time, and the two weights will be compared. When the two weights are inconsistent, it indicates that the mesh plate 15 may be blocked. Therefore, by detecting the air volume, when the air volume is less than the standard value, it indicates that the mesh plate 15 is blocked. At the same time, the air volume will also be detected periodically, so as to understand the status of the mesh plate 15 more accurately.

[0034] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A method for preparing large-size, high-performance isostatically pressed graphite using a short-process method, characterized in that: The process includes the following steps: batching, hot mixing, cold mixing, secondary grinding, molding, calcination, impregnation, graphitization, and purification. The calcination step includes a suction device (26) and a filtration device. The filtration device includes a filtration mechanism and a sediment chamber. The suction device (26) is used to suction the silica sand, and the filtration mechanism is used to filter the suctioned silica sand. The agglomerated material is located within the sediment chamber. The filtration device also includes a compaction mechanism located within the sediment chamber. The compaction mechanism includes a mesh plate (15), a compaction plate (14), and a drive component (13). The screen plate (15) is located in the impurity cavity and divides the impurity cavity into an upper cavity (11) and a lower cavity (12). The driving member (13) is located in the upper cavity (11) and is used to drive the crushing plate (14) to move toward the screen plate (15). The filtration device also includes a control system, which includes a control module (21), a prompting module (24), and a detection module (22). The detection module (22) is used to detect the properties of the silica sand in the lower cavity (12). If it is qualified, it sends a qualified signal to the control module (21). After receiving the qualified signal, the control module (21) controls the suction device (26). The control system also includes a measurement module (23), and the impurity chamber is provided with a discharge port, which is connected to the upper chamber (11). Uncrushed slabs are discharged from the discharge port to the measurement module (23). The measurement module (23) weighs the slabs and sends the weighing value to the control module (21). The control module (21) makes a judgment after receiving the weighing value. When the weighing value is not less than the standard value, it sends a prompt signal to the prompting unit. The prompting unit makes a prompt after receiving the prompt signal. The filter device also includes two screens. The control system includes a transfer module (25). When the weighing value is not less than the standard value, the control module (21) sends a second screening signal to the transfer module (25). The transfer module (25) transfers the material from the measuring module (23) to the second screen. After screening, the transfer module (25) transfers the material after the second screening to the measuring module (23) for a second measurement. The measuring module (23) sends the second weighing data to the control module (21). The control module (21) compares the two weighing data. If they are not equal, it sends a blockage signal to the prompting unit. After receiving the blockage signal, the prompting unit provides a blockage prompt.

2. The method for preparing large-size, high-performance isostatically pressed graphite using a short-process method according to claim 1, characterized in that: The suction device (26) includes a suction pipe (17), on which an air volume measuring instrument is installed. The control module (21) periodically sends a suction signal to the suction device (26), and the suction device (26) performs suction. The air volume measuring instrument sends the detected data to the control module (21). The control module (21) compares the detected data with the standard data. If they are different, it sends a test signal to the prompt module (24). After receiving the test signal, the prompt module (24) provides a test prompt.

3. The method for preparing large-size, high-performance isostatically pressed graphite using a short-process method according to claim 2, characterized in that: The suction device (26) includes a material pipe and a main pipe (16). The main pipe (16) is vertically arranged, and the suction pipe (17) is bent and both ends are connected to the main pipe (16). The suction pipe (17) is also equipped with a solenoid valve.

4. The method for preparing large-size, high-performance isostatically pressed graphite in a short process according to claim 2, characterized in that: If the detected data is greater than the standard data, a damage signal is sent to the prompting module (24). After receiving the damage signal, the prompting module (24) will issue a damage prompt. If the detected data is less than the standard data, a blockage signal is sent to the prompting module (24). After receiving the blockage signal, the prompting module (24) will issue a blockage prompt.

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