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Home / News / Graphite electrodes are mainly used for electric furnace steelmaking 
Graphite electrodes are mainly used for electric furnace steelmaking 
Views: 15 Update date: Jun 20,2022

Graphite electrode refers to petroleum coke, needle coke as raw material, coal tar for adhesives, after raw material calcined, broken grinding, mixing, kneading, molding, calcination, impregnation, graphite and mechanical processing and made of a kind of high temperature resistance of graphite conductive material, called artificial graphite electrode, to distinguish it from the natural graphite as raw material preparation of natural graphite electrode. According to its quality index, it can be divided into ordinary power graphite electrode, high power graphite electrode and ultra-high power graphite electrode.


High power graphite electrode is made of high quality petroleum coke (or low grade needle coke) production, sometimes the electrode body needs to be impregnated, its physical and mechanical properties are higher than ordinary power graphite electrode, such as low resistivity, allowing a larger current density. High power graphite electrode allows the use of current density of 18 ~ 25A/cm2 graphite electrode, mainly used in high power arc furnace steel making.


Electric furnace steelmaking is a major user of graphite electrodes. The output of eAF steel in China accounts for about 18% of the output of crude steel, and the graphite electrode used in steelmaking accounts for 70% ~ 80% of the total amount of graphite electrode. Electric furnace steelmaking is the use of graphite electrode into the furnace current, the use of electric extremes and charge between the arc generated by the high temperature heat source to smelting.


Arc furnace is mainly used in the production of industrial yellow phosphorus and silicon, etc., its characteristic is the lower part of the conductive electrode buried in furnace charge, arc formed within the material layer, and use the furnace charge itself from the resistance of the heat energy to heating furnace charge, one of the high current density required -arc furnace need graphite electrode, such as silicon 1 t per production to consumption of graphite electrode is about 100 kg, About 40kg of graphite electrode is needed to produce 1t yellow phosphorus.


The graphitization furnace for the production of graphite products, the melting furnace for melting glass and the electric furnace for the production of silicon carbide belong to the resistance furnace. The material in the furnace is both the heating resistance and the heating object. Usually, the conductive graphite electrode is embedded in the furnace wall at the end of the resistance furnace, and the graphite electrode is used for the discontinuous consumption here.

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