Production process of large isotropic and isostatic high purity graphite with fine particles

An isotropic, production process technology, applied in inorganic chemistry, non-metallic elements, carbon compounds, etc., can solve the problems of low physical and chemical indicators of mechanical properties, low isostatic graphite specifications, uneven bulk density, etc. Good homogeneity performance, improving strength and reducing porosity

Active Publication Date: 2012-06-20
雅安恒圣高纯石墨科技有限责任公司
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  • Abstract
  • Description
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Problems solved by technology

[0003] The purpose of the present invention is to solve the deficiencies of the existing isostatic graphite production process, to provide a new production process for large-scale fine particle isotropic isostatic high-purity graphite, to overcome the graphite product particles produced by the traditional production process. Large diameter, low physical and chemical indicators of mechanical properties, poor isotropy, uneven and low bulk density, and the production of isostatic graphite has small specifications, etc.

Method used

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  • Production process of large isotropic and isostatic high purity graphite with fine particles
  • Production process of large isotropic and isostatic high purity graphite with fine particles

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Embodiment Construction

[0037] Further describe the technical scheme of the present invention below in conjunction with accompanying drawing and embodiment:

[0038] [Example 1] such as figure 1 Shown, the production process of large-scale fine particle isotropic isostatic graphite, it comprises the following steps, in the present embodiment, coke powder is used needle coke, additive is used boric acid:

[0039] (1) Prefabricated powder processing: the needle coke, recarburizer and graphite powder are respectively crushed by jaw type, and then ground into prefabricated powder with an average particle size of 4um by a mill or jet mill;

[0040] (2) Prefabricated flake processing: Weigh needle coke prefabricated powder, graphite powder prefabricated powder, carburant prefabricated powder, fine powder and modified asphalt according to the weight ratio of a formula and knead them at a high temperature of 140°C. The paste formed after the kneading is completed is put into a high-temperature rolling machi...

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Abstract

The invention discloses a production process of large isotropic and isostatic high purity graphite with fine particles, which comprises the following steps: processing prefabricated powder; processing prefabricated tablets; pressing prefabricated green bodies; processing prefabricated roasting scraps; processing prefabricated smashed coke powder; processing tablets; pressing green bodies; roasting and soaking; and graphitizing and finishing. A graphite product produced by the production process provided by the invention has a large size and has the diameter being more than phi 900; the strength, the density and the elasticity of the product are improved, and the mechanical behavior physical and chemical indicators of a final product is improved; and simultaneously, the produced graphite product has the characteristics of favorable isotropic performance, uniform and delicate structure, high volume density and the like.

Description

technical field [0001] The invention relates to a production process of large-scale fine particle isotropic isostatic high-purity 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 various sectors and industries of the economy. The production of graphite materials is usually obtained by using calcined petroleum coke, pitch coke, etc. as aggregates and modified asphalt binders, mixed with a kneader, and then formed, roasted, impregnated, and graphitized by electrical heat treatment. However, the graphite products produced by the traditional production process have a large particle size, low mechanical properties, poor isotropy, and uneven and low bulk density. At present, the isostatic graphite t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/205
Inventor 叶有发
Owner 雅安恒圣高纯石墨科技有限责任公司
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