Clinker is an artificial rock produced from limestone, clay and ferruginous additives.
These materials are ground together to obtain a precisely specific mixture, this homogeneous raw meal is heated in a rotary kiln up to 1450ºC to reach the sintering point.
Clinker is composed by 4 majors oxides, i.e. calcium, silicium, aluminum and iron oxide. It is the basic material to obtain Portland Cement. It can be ground at the same factory where it was produced or it can be transported to another cement plant or grinding facility for transformation.- Portland Cement Clinker