Graphite electrodes are mainly made of petroleum coke and needle coke, and coal tar pitch is used as a binder. They are made by calcination, batching, kneading, pressing, roasting, graphitization, and machining. They are released in the form of arcs in electric arc furnaces. Conductors that are heated and melted by electric energy can be divided into ordinary power, high power and ultra-high power according to their quality indicators.