Raw Materials : Dolomite | KELSEN Refractarios | .
Our raw material Dolomite: double calcium carbonate and magnesium CaMg(CO 3) 2 when theoretically pure, contains a stoichiometric ratio of calcium carbonates and magnesium: 45,7% MgCO 3 (21,85% MgO) and 54,3% CaCO 3 (30,4% CaO). Our dolomites are very close to these values because they do not have the undesirable impurities for brick manufacture such as melting oxides SiO 2, Al 2 O 3 y Fe .