... :90%-95% 3.Dead burned magnesite:85% 4.Fused magnesia:94-98% Fused magnesia is of complete structure, good stability, high temperature ... metallurgy, building materials, chemical industry, national defence, etc.NAME: FUSED MAGNESIA GradeMgO(min.)SiO2(max.)CaO(max.)Fe2O3(max.)Al2O3(max ... %1.50%1.10%0.70%0.15% refractory fused magnesia