Clinker (cement) - WikipediaIn the manufacture of Portland cement, clinker occurs as lumps or nodules, usually 3 . The major raw material for the clinker-making is usually line mixed with a second material containing clay as source of alumino-silicate. Normally, an.how to make cement from clinker,What are Cement Clinkers? (with pictures) - wiseGEEKCement is heavily relied upon to produce mortar, grouts, and concrete, and cement clinkers are the first stage, post firing, in making cement. Cement has strong.