Preparation process of high-strength graphite material

Abstract

The invention relates to the field of graphite material preparation, in particular to a preparation process of high-strength graphite material, comprising the following steps: selecting raw petroleum coke, putting the raw petroleum coke into a drum furnace; formulating a heating curve for heating to obtain semi-coke, wherein raising the temperature The upper limit of the temperature rise of the curve is 500-600°C; grind the semi-coke to an average particle size of 5-6μm, then put it into the kneading pot and add a dispersant to the kneading pot, raise the temperature to 140-150°C, knead for 45-50min, and then Put the molten binder into the kneading pot, keep the temperature at 140-150°C, and knead for 45-50 minutes to obtain a paste; process the paste twice to obtain a sheet; grind the sheet to an average particle size of 20 ‑22μm, and then molded to obtain a green body; the green body is roasted and then graphitized to obtain a finished high-strength graphite material. The production cycle is short, the production cost is low, and the high-strength graphite material obtained has high performance.

Description

Technical field [0001] The present invention relates to the field of preparation of graphite materials, and more particularly to a high strength graphite material. Background technique [0002] With the development of industrial and high-tech, graphite material self-lubricity conductive heat-resistant corrosion resistant high temperature machinery strength, widely used in the abrasive industry, semiconductor industry photovoltaic electric sparks, etc. At present, the raw materials of traditional graphite products are Calcined oil coke, calcined asphalt coke, bonded to 20 microns of powder, mixed 60 minutes in heated blended pot, so that the powder temperature is 150-160 degrees, then the binder is a coal asphalt. Mixed 60 minutes in the mixed pot, the powder and the asphalt were mixed well, and then the mixture passed through the rolling machine, then the frozen, re-formed and calcined, the product produced was low in dense and low, and the porlet ratio was high. It is impossible...

AI Technical Summary

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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