Fused Cast AZS BRICKSÂ are the most widely used materials both in glass contact and superstructure of glass melting furnaces. They can be classified by their zirconia content, which basically defines their corrosion resistance. Fused Cast AZS are the most widely used materials in glass melting furnaces, frit kilns and occasionally some foundry plants(skid rails of reheating furnace). They can be classified by their zirconia content, which basically defines their corrosion resistance, into 3 families: AZS 33, AZS36 &AZS 41z
