AMORPHOUS REFRACTORY FOR CASTING

摘要

PURPOSE:To provide a casting refractory having excellent resistance in use. CONSTITUTION:The objective alumina-spinel refractory for casting is composed of 1-15wt.% of ultrafine powder of MgO.A;2O3 spinel having particle diameter of <=5mum, 1-20wt.% of an alumina cement and the remaining part of alumina raw material. It is composed of l-15wt.% of ultrafine powder of MgO.Al2O3 spinel having particle diameter of <=5mum, <=38wt.% of MgO.Al2O3 spinel clinker having particle diameter of <=1mm, 1-20wt.% of alumina cement and the remaining part of alumina raw material. The sum of the ultrafine spinel powder and the spinel clinker is <=40wt.%.