Production technology of large-specification extraordinary isotropic graphite material

Abstract

A production technology of a large-specification extraordinary isotropic graphite material comprises the following steps: preparing coke powder with the average particle size of 6-20mum through utilizing airflow crushing, carrying out kneading, rolling and extrusion molding on the coke powder, rapidly charring, carrying out secondary kneading and rolling after charring, pre-molding the material subjected to the secondary kneading and rolling, and carrying out sequent processes of isopressing molding, dipping, roasting, graphitization and the like on pre-molded green body to prepare isopressed graphite; and carrying out cold molding and pressure holding stripping, and roasting and dipping many times to prepare the extraordinary isotropic graphite material. The extraordinary isotropic graphite material prepared through the method of the invention has the advantages of high mechanical strength, low porosity and excellent surface processing characteristic.

Description

technical field [0001] The invention relates to a graphite processing technology, in particular to a production technology of a large-scale special isotropic graphite material. Background technique [0002] Graphite material has been widely used in many fields because of its high temperature resistance, corrosion resistance, self-lubrication and other characteristics. With the development of science and technology, the performance of graphite materials in various application fields has put forward higher requirements. Graphite materials are usually prepared by using calcined coke as aggregate carbon and modified pitch as binder, after mechanical mixing, molding, impregnation and graphitization heat treatment. However, in the above process, more than one-third of the binder decomposes and develops during the roasting process, resulting in a difference in volume shrinkage between the filler and the binder, which ultimately results in graphite materials with high porosity, poo...

AI Technical Summary

Problems solved by technology

However, in the above process, more than one-third of the binder decomposes and develops during the roasting process, resulting in a difference in volume shrinkage between the filler and the binder, which ultimately results in graphite materials with high porosity, poor structure uniformity, Obvious interface and other characteristics, resulting in a decrease in the mechanical strength of the final material

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