Refractory for casting and method of manufacturing the same

摘要

Provided is a refractory for casting which contains clinker having a mineral crystal phase consisting essentially of mullite and baddeleyite. The refractory for casting has excellent in a thermal-shock resistance, corrosion resistance and strength. The refractory for casting is manufactured from a raw material containing a refractory composition and an organic binder, wherein the refractory composition comprises (a) 3 to 60 wt % of clinker having a mineral crystal phase consisting essentially of mullite and baddeleyite, and containing 5 to 22 wt % of alumina (Al2O3), 38 to 68 wt % of zirconia (ZrO2) and 27 to 40 wt % of silica; (b) 5 to 40 wt % of at least one carbon-based material selected from the group consisting of graphite and carbon; and (c) at least one refractory element as a balance, selected from the group consisting of alumina, fused silica, zirconia, silicon carbide, mullite and a metal silicon.