400mm RP Graphite Electrode

Graphite electrode is made of petroleum coke, needle coke as aggregate, coal tar pitch as binder, after a series of processes such as mixing, kneading, molding, roasting, impregnation, graphitization, mechanical processing produced by a high-temperature resistant graphite conductive material.
Petroleum coke can be divided into coking and calcined coke according to the heat treatment temperature. The former is petroleum coke obtained from delayed coking, which contains a large amount of volatile matter and has low mechanical strength, while calcined coke is obtained from calcined coke. Most refineries in China only produce raw coke, and calcination is mostly carried out in carbon plants.
The anisotropy of the physical and mechanical properties of the needle focus is very obvious, and it has good electrical and thermal conductivity in the direction parallel to the long axis of the particle, and the coefficient of thermal expansion is low. When extrusion molding, the long axis of most particles is arranged in the direction of extrusion.
Coal tar pitch is one of the main products of coal tar deep processing. It is a mixture of a variety of hydrocarbons, black high viscosity semissolids or solids at room temperature, no fixed melting point, softened by heat, then melted, density 1.25-1.35g/cm3 According to its softening point is divided into three kinds of low temperature, moderate and high temperature asphalt.