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Petroleum coke is a byproduct of refining crude oil get, often pressure distillation or vacuum distillation residue of crude oil and petroleum pitch, can be as raw materials for the manufacture of petroleum coke, then through coking and then get raw petroleum coke.The output of raw petroleum coke about less than 5% of the amount of crude oil used.The raw petroleum coke production capacity of about 30 million t.High content of impurities in raw petroleum coke, cannot be directly used as recarburizer, must first after calcination process.

Raw petroleum coke has a cavernous, acicular, granular and varieties such as flow pattern.

By delayed coking is spongy petroleum coke is, because of the sulfur and metal content is higher, usually used as the burning of fuel, also can be used as the raw material of calcined petroleum coke.The sponge coke, mainly used for aluminium and used as recarburizer.

Needle petroleum coke, is high with aromatic hydrocarbon content, low content of impurities of raw material, by delayed coking method.The acicular structure of coke is easily broken, sometimes called graphite coke, mainly used in the manufacture of graphite electrode after calcination.Granular petroleum coke is hard granular, with sulfur and high asphaltene content of raw material, the use of delayed coking method, mainly used as fuel.

Flow petroleum coke, is by continuous coking is within the flow bed, omnidirectional structure, a tiny particles of high sulfur content, low volatile.

Calcined petroleum coke, is in order to remove sulfur, moisture, and volatile.The raw petroleum coke in 1200 ~ 1350 ℃ calcination, basically can make it a pure carbon.

Is the biggest users of calcined petroleum coke in aluminium, 70% used to produce the bauxite of anode.U.S. production of calcined petroleum coke, used in cast iron recarburizer accounts for about 6%.