| 摘要 |
A refractory castable comprised of: about 45% to about 75% by weight high alumina grain; about 2% to about 35% by weight silicon carbide; about 1% to about 8% by weight carbon; about 1% to about 8% by weight calcium aluminate cement; and about 1% to about 10% by weight fine magnesium aluminate spinel, the spinel having a grain size of less than about 150 mu m (100 Tyler mesh) and being comprised of about 10% to about 33% by weight magnesium oxide (MgO) and about 67% to about 90% by weight alumina (Al2O3). |
