Production process of ultrafine powder isostatic pressing graphite

Abstract

The invention relates to a superfine powder isostatic pressing graphite production process, and relates to the technical field of isostatic pressing graphites.The step of cooling a paste material comprises the following steps of flattening, pouring the paste material on a forming plate, rolling the paste material to be flat, forming a rolled sheet with the thickness being 1-3 mm, indenting, forming indentations on the rolled sheet, and cooling the indented sheet to obtain the superfine powder isostatic pressing graphite. The depth of the indentation is smaller than or equal to the thickness of the sheet-shaped paste, and a cooling step of dividing the sheet-shaped paste into a plurality of independent areas and performing forced convection cooling on each area. The paste cooling device has the advantage of being short in paste cooling time.

Description

Technical Field

[0001] The present application relates to the technical field of isostatically pressed graphite, and in particular to a process for producing ultrafine powdered isostatically pressed graphite. Background Art

[0002] By increasing the proportion of ultrafine powder, isostatic graphite with a denser structure and better uniformity can be produced. During the isostatic graphite production process, the kneaded paste needs to be sheeted to more effectively combine the binder and coke powder. However, existing pastes require a long cooling time. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, one of the purposes of this application is to provide a process for producing ultrafine powder isostatic graphite, which has the advantage of shorter paste cooling time.

[0004] The above-mentioned purpose of this application is achieved through the following technical solutions:

[0005] A process for producing ultrafine isostatically pressed graphite powder, wherein the paste is cooled, comprising the following steps: a flattening step of pouring the paste onto a forming plate and flattening the paste to form a sheet with a thickness of 1-3 mm; an indentation step of forming an indentation on the sheet, wherein the depth of the indentation is less than or equal to the thickness of the flaky paste; and a cooling step of dividing the flaky paste into multiple independent areas and subjecting each area to forced convection cooling.

[0006] By adopting the above technical solution, during the preparation process, the paste is flattened, and after flattening, indentation operations and area segmentation are performed, and finally the paste is cooled by forced convection cooling, thereby shortening the cooling time.

[0007] In a preferred example, the present application can be further configured as follows: after cooling is completed, the sheet paste is transferred to a separation mesh, the transverse lines and longitudinal lines of the separation mesh are located in the corresponding indentations, and then pressure is applied to the sheet paste to form a number of small pieces.

[0008] By adopting the above technical solution, that is, by dividing the flaky paste into several small pieces, the flaky paste can be crushed better and the crushing time can be shortened in the next crushing process.

[0009] In a preferred example, the present application can be further configured as follows: after transferring the sheet paste to the partition mesh, obtaining the distance between the partition mesh and the forming plate, if the distance is zero, applying horizontal force to the forming plate to make the paste fall off the forming plate.

[0010] By adopting the above technical solution, that is, when the spacing between the partition mesh and the forming plate is zero, it indicates that the multiple sheet pastes on the forming plate are independent of each other. Therefore, through the horizontal force, the sheet pastes come into contact with the transverse lines and / or longitudinal lines of the partition mesh, and then fall off the partition mesh.

[0011] In a preferred example, the present application can be further configured as follows: after the sheet paste is transferred to the partition plate, the symmetrical sides of the forming plate are limited by the limiting grooves, and then a horizontal force is applied to the forming plate, and the force direction of the forming plate is parallel to the length direction of the limiting grooves.

[0012] By adopting the above technical solution, the presence of the limiting plate makes the forming plate more stable when a force is applied to the forming plate in a horizontal direction.

[0013] In a preferred example, the present application can be further configured as follows: if the spacing between the separating mesh plate and the forming plate is not zero, a vertical force is first applied to the forming plate to make the spacing become zero, and then a horizontal force is applied to make the sheet paste fall off the forming plate.

[0014] By adopting the above technical solution, the spacing between the separating mesh plate and the forming plate is not zero, that is, the multiple sheet pastes formed by the indentations are still connected to each other. Therefore, by applying pressure, the spacing becomes zero, that is, it breaks at the indentation, thereby separating the multiple sheet pastes, thereby facilitating the sheet paste to fall off from the forming plate.

[0015] In a preferred example, the present application can be further configured as follows: the forming plate is made of a flexible material, and when a vertical force is applied to the forming plate, the projection of the force-applying component on the horizontal plane is located within a single area formed by the indentation.

[0016] By adopting the above technical solution, when the force applying component applies force, its force application range is within the mesh range of the separation mesh plate, so that the sheet paste has a better force effect and is easier to separate.

[0017] In a preferred example, the present application can be further configured as follows: there are at least two groups of force-applying components, and when applying force, the force-applying components are arranged adjacent to each other.

[0018] By adopting the above technical solution, when adjacent force-exerting components apply force simultaneously, the connection points of adjacent sheet-like pastes are subjected to greater pressure, thereby making the sheet-like pastes easier to break and separate.

[0019] In a preferred example, the present application can be further configured as follows: after the vertical force is applied, a vertical force is applied to the forming plate by a pressing plate so that the forming plate and the partition mesh plate are in contact, and then a horizontal force is applied to the forming plate.

[0020] By adopting the above technical solution, in this process, when the sheet paste breaks, the forming plate and the separating mesh plate are brought into contact, so that the transverse lines and longitudinal lines of the separating mesh plate are embedded between adjacent sheet pastes. At this time, the forming plate will be stretched, making it easier for the sheet paste to fall off from the forming plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a cooling schematic diagram of this application.

[0022] Reference numerals: 1, forming plate; 2, partition plate; 3, sheeting. DETAILED DESCRIPTION

[0023] The present application is further described in detail below with reference to the accompanying drawings.

[0024] Reference Figure 1 , a process for producing ultrafine isostatic graphite powder disclosed in this application, wherein the paste is cooled and comprises the following steps: a flattening step, wherein the paste is poured onto a forming plate 1 and flattened to form a rolled sheet 3 with a thickness of 1-3 mm. In this step, the forming plate 1 is made of a flexible material, such as rubber or silicone, and has a thickness of 1-2 mm;

[0025] an indentation step of forming an indentation on the rolled sheet 3, wherein the depth of the indentation is less than or equal to the thickness of the flaky paste; a cooling step of dividing the flaky paste into a plurality of independent regions by a partition plate 2, and subjecting each region to forced convection cooling. The partition plate 2 is in a right-angled U-shape, with one side wall of the partition plate 2 extending into one indentation and the other side wall extending into another indentation (the two indentations may be adjacent or non-adjacent), thereby forming a cooling cavity. The paste is cooled by forced convection of gas in the cooling cavity;

[0026] After cooling is completed, the forming plate 1 and the paste are transferred to the partition mesh, and the horizontal lines (partitions) and vertical lines (partitions) of the partition mesh are located in the corresponding indentations, and the symmetrical sides of the forming plate 1 are limited by the limiting grooves; then the spacing between the partition mesh and the forming plate 1 is judged. If the spacing between the partition mesh and the forming plate 1 is not zero, a vertical force is first applied to the forming plate 1 to make the spacing zero, and a vertical force is applied to the forming plate 1 by the pressing plate to make the forming plate 1 and the partition mesh contact, and then a horizontal force is applied to make the sheet paste fall off the forming plate 1. During the vertical force application process, the projection of the force-applying component on the horizontal plane is located in a single area formed by the indentation, that is, the projection of the force-applying component on the horizontal plane is located within the mesh range of the partition mesh. There are at least two groups of force-applying components, and when applying force, the force-applying components are arranged adjacent to each other. In this embodiment, the force-applying component is rod-shaped.

[0027] The implementation principle of this embodiment is: in use, the paste is rolled into a plate shape, and then the rolled sheet 3 is separated and forced convection cooled. After the cooling is completed, the rolled sheet 3 is separated into several sheet pastes along the indentation, which is convenient for the subsequent crushing step.

[0028] The embodiments of this specific implementation method are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A process for producing ultrafine isostatically pressed graphite, characterized in that: The paste is cooled, comprising the following steps: a flattening step, pouring the paste onto a forming plate (1), and flattening the paste to form a sheet (3) having a thickness of 1-3 mm; an indentation step, forming an indentation on the sheet (3), wherein the depth of the indentation is less than or equal to the thickness of the sheet paste; and a cooling step, dividing the sheet paste into a plurality of independent regions, and subjecting each region to forced convection cooling.

2. The process for producing ultrafine isostatically pressed graphite powder according to claim 1, wherein: After cooling is completed, the sheet paste is transferred to a separation mesh, with the transverse lines and the longitudinal lines of the separation mesh located in the corresponding indentations. Subsequently, pressure is applied to the sheet paste to form the sheet paste into several small pieces.

3. The process for producing ultrafine isostatically pressed graphite powder according to claim 2, wherein: After the sheet paste is transferred to the partition mesh, the distance between the partition mesh and the forming plate (1) is obtained. If the distance is zero, a horizontal force is applied to the forming plate (1) to make the paste fall off the forming plate (1).

4. The process for producing ultrafine isostatically pressed graphite powder according to claim 3, wherein: After the sheet paste is transferred to the partition plate (2), the symmetrical sides of the forming plate (1) are limited by the limiting grooves, and then a horizontal force is applied to the forming plate (1), and the force direction of the forming plate (1) is parallel to the length direction of the limiting grooves.

5. The process for producing ultrafine isostatically pressed graphite powder according to claim 4, wherein: If the distance between the separating mesh and the forming plate (1) is not zero, a vertical force is first applied to the forming plate (1) to make the distance zero, and then a horizontal force is applied to make the sheet paste fall off the forming plate (1).

6. The process for producing ultrafine isostatically pressed graphite powder according to claim 5, wherein: The forming plate (1) is made of a flexible material. When a vertical force is applied to the forming plate (1), the projection of the force-applying component on the horizontal plane is located within a single area formed by the indentation.

7. The process for producing ultrafine isostatically pressed graphite powder according to claim 6, wherein: There are at least two groups of force-applying components, and when applying force, the force-applying components are arranged adjacent to each other.

8. The process for producing ultrafine isostatically pressed graphite powder according to claim 7, wherein: After the vertical force is applied, a vertical force is applied to the forming plate (1) by the pressing plate, so that the forming plate (1) and the partition mesh plate are in contact, and then a horizontal force is applied to the forming plate (1).

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