It is the solid carbonaceous material obtained after the coking of petroleum residue and petroleum asphalt produced by petroleum processing. The main element is carbon and the ash content is very low, generally less than 0.5%. It is prepared by the refinery through delayed coking (500℃), containing a lot of volatile matter and low mechanical strength. The appearance of petroleum coke is a black or dark gray honeycomb structure, and the pores in the coke block are oval, which belongs to the easy graphitization of carbon. High performance petroleum coke, due to its high cost performance characteristics, is also widely used in lithium battery anode materials and graphitized electrodes and other industries. Shanghai Yai has been engaged in the petroleum coke industry for many years, and owns high-quality petroleum coke resources such as CNOOC, Daqing and Fushun.