Cement Grinding - 911 MetallurgistOct 22, 2016 . The principle of Grate Discharge grinding is nearly universally adapted in the cement grinding industry. Grate Discharge Ball Mills are the rule.grinding of cement,grinding of cement,The cement mill - Understanding CementCement clinker is usually ground using a ball mill. This is essentially a large rotating drum containing grinding media - normally steel balls. As the drum rotates,.