
By-product of Coker unit. Appearance: Black or dark grey hard solid with metallic luster; porous granular, columnar or acicular coke material composed of tiny graphite crystal. Its main element is carbon; occasionally it contains a small amount of hydrogen, nitrogen, sulfur, oxygen and some metal elements, sometimes it is carried with water.
It is used to produce silicon carbide, calcium carbide and other carbon products, anode block of aluminum electrolytic cell. It can also be used as fuel.