size:80# Silica SIO2 34-38% Iron(Fe2O3+FeO) 25-33% Alumina Al2O3 17-22% Magnesium MgO 4-6% Calcium CaO 1-9% Manganese MnO 0-1% Sodium oxide Na2O 0-1% Titanium oxide TiO2 0-1% True density 3.8-4.1g/cm3 Bulk density 1.8-2.1g/cm3 Moh's hardness 7.5-8.0 chloride
