White Portland cement - WikipediaWhite Portland cement or white ordinary Portland cement (WOPC) is similar to ordinary, gray . From Wikipedia, the free encyclopedia . Often this is achieved by grinding the sand separately, using ceramic grinding media to limit the . But in white clinker production, where the iron content is low, this is not an issue.iron free grinding of white cement,WHITE CEMENT - PROPERTIES, MANUFACTURE, PROSPECTSgrinding admixture or by adjusting the grinding fineness of the cement. Special . exceeded, the iron oxides are responsible for a greenish shade of the . take place during manufacture of white cement clinker . cement. Oxidized forms of free oxides of Fe3+, Mn3+ and Mn4+ absorb more light than reduced forms Fe2+ and.
iron free grinding of white cement