Clinker is a general name given to waste from industrial processes - particularly those that involve smelting metals or burning fossil fuels. Clinker often forms a loose, black deposit that can consist of coke, coal, Slag , Charcoal , grit and other waste materials.
Cement manufacturing clinker is a kilned then quenched product primarily composed of tricalcium silicate, dicalcium silicate, tricalcium aluminate, and calcium aluminoferrite.