Petroleum coke is irregular in shape, the size of the black block (or particles), particles with multiple pore structure, the main elements of carbon, the remaining hydrogen, oxygen, nitrogen, sulfur and metal elements. Mainly used for the production of carbon products, to provide steelmaking, non-ferrous metals, aluminum smelting, production of carbonized silicon products, calcium carbide for the production of synthetic fibres, acetylene, etc. can also be made as fuel.

Petroleum Coke is a kind of graphite carbon, the micro-crystalline and metallurgical coke of petroleum coke compared with the carbon mesh sheet, the superposition of the more neat, the distance between the flake body is small; at the high temperature of graphitization, the grain average thickness (Lc) and the average width (La) of the carbon mesh flake increase, and the spacing between the flake bodies is reduced; The lattice constant is close to the natural graphite. , the resistivity decreases significantly and the true density increases correspondingly. So using petroleum coke as raw material can produce graphite electrodes with low resistivity.