Preparation technology of high-strength graphite material

Abstract

The invention relates to the field of preparation of graphite materials, in particular to a preparation technology of a high-strength graphite material. The preparation technology comprises the following steps: selecting raw petroleum coke and putting the raw petroleum coke into a rotary drum furnace; formulating a heating curve and carrying out heating treatment to obtain semicoke, wherein the heating upper limit of the heating curve is 500 to 600 DEG C; grinding the semicoke until the average granularity is 5 to 6 mu m; then putting powder into a kneading pot and adding a dispersing agent into the kneading pot, raising the temperature to 140 to 150 DEG C and kneading for 45 to 50 minutes; then putting a melt binder into the kneading pot, keeping the temperature at 140 to 150 DEG C and kneading for 45 to 50 minutes to obtain paste; carrying out flaking treatment on the paste for two times to obtain flakes; grinding the flakes until the average granularity is 20 to 22 mu m and moldingto obtain a green body; calcining the green body and graphitizing to obtain a finished product of the high-strength graphite material. The production cycle is short, the production cost is low and theobtained high-strength graphite material has high performance.

Description

technical field [0001] The invention relates to the field of graphite material preparation, in particular to a preparation process of high-strength graphite material. Background technique [0002] With the development of industry and high technology, graphite materials are widely used in abrasive tool industry, semiconductor industry, photovoltaic electric spark and other industries due to their lubricity, electrical conductivity, thermal conductivity, corrosion resistance and high temperature mechanical strength. At present, the traditional raw materials for producing graphite products are For calcined petroleum coke and calcined pitch coke, grind the calcined coke into a 20-micron powder, mix it in a heated kneading pot for 60 minutes, keep the temperature of the powder at 150-160 degrees, and then add the binder is coal tar pitch, Mix in the kneading pot for 60 minutes to make the powder and asphalt evenly mixed, then the mixed material is rolled by a flaking machine, the...

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Problems solved by technology

[0002] With the development of industry and high technology, the lubricating, conductive, thermal, and corrosion-resistant high-temperature mechanical strength of graphite materials are widely used in the abrasive tool industry, semiconductor industry, photovoltaic electric spark and other industries. At present, the traditional raw materials for the production of graphite products are Calcined petroleum coke, calcined pitch coke, calcined coke is ground into 20 micron powder, mixed in a heated kneading pot for 60 minutes, so that the temperature of the powder is 150-160 degrees, and then the binder is coal tar pitch, Mix in the kneading pot for 60 minutes to make the powder and asphalt evenly mixed, then the mixed material is rolled by a flaking machine, then ground, shaped and roasted. The product produced is low in density and strength, and has high porosity. It cannot meet the needs of the market. Traditionally, in order to make up for the lack of products, several dipping and roasting are required to meet the needs of the market. However, the production cycle is as long as 7-8 months, and the production cost increases.

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