INTRODUCTION

Graphite electrode are mainly made of petroleum coke and needle coke as raw materials and coal tar pitch as binder. They are made by calcining, batching, kneading, pressing, roasting, graphitization and machining. They are released in the form of electric arcs in an electric arc furnace. The conductors that heat and melt the charge by electric energy can be divided into ordinary power, high power and ultra-high power according to their quality indicators. Graphite electrodes mainly include ordinary power graphite electrodes, anti-oxidation coated graphite electrodes, high-power graphite electrodes and ultra-high-power graphite electrodes.