Calcined petroleum coke (CPC) is the product from calcining petroleum coke. This coke is the product of the coker unit in a crude oil refinery. The calcined petroleum coke is used to make anodes for the aluminium, steel and titanium smelting specification : Specification of Calcined Petroleum Coke Chemical Fixed Carbon % 98.5 Min Moisture % 0.5 Max Volatile Matter % 0.5 Max Ash % 0.5 Max Sulphur % 1.35 Max Iron, Nickel,Silicon % In traces