Clinker (cement) - WikipediaIn the manufacture of Portland cement, clinker occurs as lumps or nodules, usually 3 . Cement manufacturers purchasing clinker usually grind it as an addition to their own clinker at their cement plants. Manufacturers also ship clinker to.clinker grinding and cement preparation,Cement Manufacturing Process - HeidelbergCement India LimitedIn cement manufacture it is prime raw material and its usage would be 90- . materials Grinding Storing and Blending. 3. . Clinker grinding along with gypsum.