refractories block AZS 33

fused cast AZS-33 feeder channel block assembly Compact microstructure of AZS-33# enables it to have very good corrosion resistance to melting glass. It rarely results into stoning, blistering and other defects to glass, so AZS-33# is the most common product used in glass furnaces. Typical Chemical Composition: Al2O3 49.8% Zr2O3 33% SiO2 15.5% NaO2 1.4% Fe2O3+TiO2+CaO 0.3% Typical Crystallographic Analysis: baddeleyite 32% Alumina (corundum) 47% Vitreous Phase 21%