Large-specification fine-grain isotropic isostatic-pressing graphite

Abstract

The invention discloses large-specification fine-grain isotropic isostatic-pressing high-purity graphite mainly composed of components of, by weight: 52-65 parts of material powder, and 35-48 parts of modified pitch. The material powder is composed of components of, by weight: 75-94 parts of prefabricated crushed coke powder, 2-18 parts of graphite powder, and 2-8 parts of an additive. The prefabricated crushed coke powder is composed of components of, by weight: 52-65 parts of prefabricated material powder, and 35-48 parts of modified pitch. The prefabricated material powder is composed of components of, by weight: 52-85 parts of petroleum coke, 2-20 parts of graphite powder, 6-45 parts of a carburant, and 3-12 parts of fine powder. The production specification of the graphite is large. According to the invention, production of graphite with a large-specification of phi900 can be realized. The graphite is advantaged in high strength, high density, good elasticity, excellent mechanical properties, and excellent physical chemical index. The graphite material is advantaged in low porosity, good quality, uniform and delicate structure, and relatively high volume density.

Description

technical field [0001] The invention relates to a large-scale fine particle isotropic isostatic graphite. Background technique [0002] Isostatic graphite material has good electrical and thermal conductivity, high temperature resistance, good corrosion resistance, self-lubricating, high bulk density, easy for technicians, etc., and is closely connected with today's high-tech cutting-edge technology. It has been widely used in economic, chemical, aerospace and nuclear energy sectors and industries, especially in various nuclear fusion devices. The existing graphite production industry generally believes that the graphite material prepared from graphite powder as a raw material has low strength and cannot meet the high requirements for use strength, and materials such as petroleum coke and pitch coke are used instead of graphite powder. [0003] The existing isostatic graphite materials have the following disadvantages: (1) The production specifications are small, and the pr...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the deficiency of existing isostatic graphite materials, provide a new type of isotropic isostatic graphite with large-scale fine particles, overcome the small production specifications of traditional graphite materials, and cannot realize the production of large-scale graphite products Poor strength, density and elastic properties, unsatisfactory physical and chemical indicators of mechanical properties; high porosity in graphite materials, which affects material quality; rough particle size of component structure, uneven and low volume density, etc.

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