Oxbow Carbon (formerly known as Oxbow Carbon & Minerals) distributes petroleum coke to customers worldwide, primarily in the cement, utilities, steel, and home heating industries. (Petroleum coke, a by-product of the oil refining process, is used as a fuel. Calcined petroleum coke, a refined form of petroleum coke, is used as a source of carbon, mainly by aluminum producers.) Oxbow Carbon also distributes metallurgical coke, a by-product of coal processing that is used by iron producers and sugar refiners. The company operates four bulk shipping terminals, located on the Gulf Coast and the West Coast of the US and in the Caribbean and South America. Oxbow Carbon is a unit of Oxbow.