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A process for producing high-end graphite materials by rapid roasting

A graphite material and roasting technology, which is applied in the direction of carbon compounds, inorganic chemistry, chemical instruments and methods, etc., can solve the problems of uncontrollable rough molding density and low quality of graphite materials, etc., to achieve increased density, increased bulk density, and stable production Effect

Active Publication Date: 2020-06-05
SINOSTEEL NEW MATERIAL ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to address the deficiencies of the prior art and provide a process for producing high-end graphite materials by rapid roasting. By combining the forming and roasting process, the ballast force acting on the rough blank during the forming process is used to achieve During the roasting process, the rough billet is subjected to secondary pressing to make the density controllable while further increasing it, which solves the technical problem in the prior art that the rough billet molding density cannot be controlled and leads to low quality graphite materials

Method used

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  • A process for producing high-end graphite materials by rapid roasting
  • A process for producing high-end graphite materials by rapid roasting

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Embodiment 1

[0028] According to the drawings in the manual figure 1 A process for producing high-end graphite materials by rapid sintering in this example is described.

[0029] A process for producing high-end graphite materials by rapid roasting, comprising the following steps:

[0030] (a) Filler molding: the paste powder used for graphite material production is evenly added to the lower template 11 containing multiple mold cavities 111, after the upper template 12 is driven by the press 1 to move and cooperate with the lower template 11 to form a sealed state, The paste powder in the mold cavity 111 is compacted and formed by intermittent pressurization to form a compact structure; in this embodiment, the material of the lower template and the upper template is preferably ceramics, and the The characteristics of high temperature resistance and small deformation of ceramics realize the high-precision production of fired bodies;

[0031] (b) pressure-holding roasting, after the compac...

Embodiment 2

[0037] Wherein, the same or corresponding parts as those in the first embodiment adopt the reference numerals corresponding to the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below; the difference between the second embodiment and the first embodiment is that : the step (a) includes a pre-press molding part, the upper template 12 moves down in an inlaid and sealed manner, and after the pressure in the mold cavity 111 reaches 5-6MPa, the upper template 12 stops moving and vibrates the The paste powder in the mold cavity 111 is subjected to a vibration process that lasts for 10-20 seconds.

[0038] Further, the step (a) also includes a secondary molding part. After the pre-pressed molding part, the upper template 12 continues to move down to perform secondary compaction on the paste powder in the mold cavity 111, so that the mold cavity After the internal pressure of 111 reaches 260-300MPa, the movement of the upper ...

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Abstract

The invention relates to the technical field of artificial graphite production, in particular to a technology for producing a high-end graphite material through rapid roasting. The method comprises steps of filler forming, pressure maintained roasting, pressure maintained cooling and cooling and pressure relief. To be specific, paste powder is uniformly added to a mold cavity and subjected to compaction forming treatment through an upper mold plate; a press stops moving, an electric heating wire performs heating roasting treatment on a rough blank located on a lower mold plate in an electric heating manner, after roasting, a roasted body is naturally cooled, and then, the roasted body is cooled to 100 DEG C in a heat transfer manner; the pressure of the mold cavity is relieved to be normal, and a roasted body with the compact structure is obtained. Forming and roasting procedures are combined, the rough blank in the roasting process is pressed secondarily by use of ballast force actingon the rough blank in the forming process, so that the density of the rough blank is controllable and further improved, and the technical problem of poor graphite material quality due to the fact that the forming density of rough blanks cannot be controlled in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of artificial graphite production, in particular to a process for producing high-end graphite materials by rapid roasting. Background technique [0002] The current graphite production process includes four processes: powder making, pressing, roasting (1000-1300°C), and graphitization (2500-3000°C), and the production cycle is long. It is two processes; the density of the rough billet obtained in the molding process is not controlled, and the density of the rough billet directly affects the bulk density of the subsequent finished graphite, especially for graphite for reactor nuclear fuel elements, which has great impact on the strength and wear resistance of nuclear fuel elements Therefore, it is difficult to control the rough density in the traditional graphite production process, which makes it difficult to meet the high standard graphite material production. Contents of the invention [0003] The purpo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/205
CPCC01B32/205
Inventor 黄岱刘涛徐建其
Owner SINOSTEEL NEW MATERIAL ZHEJIANG