Graphitized petroleum coke is calcined petroleum coke as raw material, after high temperature graphitization, physical and chemical reaction and sulfur removal ash and other impurities after the product is sometimes called artificial graphite, used in carburizing agent, often known as ultra-low sulfur/low nitrogen carburizing agent. Graphitized petroleum coke is a black or dark gray hard solid petroleum product, metallic luster, porous, is composed of tiny graphite crystallized into a granular, columnar or needle form of carbon body. Petroleum coke is a hydrocarbon, containing more than 99% carbon, but also contains nitrogen, chlorine, sulfur and heavy metal compounds.