What is a graphite electrode?
Graphite electrode refers to a kind of resistant material made by using petroleum coke and pitch coke as aggregate and coal tar pitch as binding agent through raw material calcination, crushing and grinding, batching, kneading, molding, roasting, impregnation, graphitization and mechanical processing. High-temperature graphite conductive material, called artificial graphite electrode (referred to as graphite electrode), to distinguish it from natural graphite electrodes prepared from natural graphite.
Graphite electrodes are mainly made of petroleum coke and needle coke as raw materials, coal tar pitch as a binder, and are made by calcination, batching, kneading, pressing, roasting, graphitization, and machining. It releases electric energy in the form of electric arc in an electric arc furnace. The conductors that heat and melt the charge can be divided into ordinary power graphite electrodes, high power graphite electrodes and ultra-high power graphite electrodes according to their quality indicators.
The main raw material for graphite electrode production is petroleum coke. A small amount of pitch coke can be added to ordinary power graphite electrodes, and the sulfur content of petroleum coke and pitch coke cannot exceed 0.5%. Needle coke is also needed when producing high-power or ultra-high-power graphite electrodes. The main raw material for aluminum anode production is petroleum coke, and the sulfur content is controlled not to exceed 1.5% to 2%. The petroleum coke and pitch coke should meet the relevant national quality standards.