Coal tar is one of the product of raw gas which is produced by thermolysis in coking sector. Coal tar is a black or dark brown viscous liquid under normal pressure and temperature, mainly composed of polycyclic aromatic hydrocarbons, less alkyl aromatics content, there are mainly 1 - methylnaphthalene, 2 - methylnaphthalene, acenaphthylene, Cong, oxygen Cong, anthracene, quinoline, phenol, pyrene, and other components, used as raw materials for fuel and chemical industry. We produce middle temperature coal tar, high temperature coal tar, and high temperature high naphthalene coal tar etc..