Chemical Composition Of Slag

The chemical composition of slag includes oxides such as CaO, SiO2, Al2O3, MgO, MnO, Fe2O3, and a small amount of sulfides such as CaS, MnS, etc. Generally speaking, the content of CaO, SiO2, and Al2O3 accounts for more than 90%. The chemical composition of slag is basically the same as that of cement, except that the CaO content is low and the SiO2 content is high. In addition, alkaline slag with high CaO content also contains components such as dicalcium silicate, so the slag itself has weak water hardness.