CPC Main Group C04B 2/00 Lime, magnesia or dolomite (hydraulic lime cements C04B7/34) 3 direct subcodes Child Classifications Navigate with arrow keys, Enter to open C04B 2/005 C04B 2/02 Lime C04B 2/10 Preheating, burning calcining or cooling (decarbonation during burning of cement raw materials C04B7/43; )