A refractory castable comprised of:PPabout 45% to about 75% by weight high alumina grain;PPabout 2% to about 35% by weight silicon carbide;PPabout 1% to about 8% by weight carbon;PPabout 1% to about 8% by weight calcium aluminate cement; andPPabout 1% to about 10% by weight fine magnesium aluminate spinel,PPthe spinel having a grain size of less than about 150 &mgr;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 (Al.sub.2 O.sub.3).
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机译：一种耐火浇注料，包括：按重量计约45％至约75％的高氧化铝晶粒;按重量计约2％至约35％的碳化硅;按重量计约P。碳按重量计为1％至约8％;铝酸钙水泥为按重量计约1％至约8％;和按重量计约1％至约10％的细铝酸铝尖晶石，其尖晶石具有小于约150μm（100泰勒目）的晶粒尺寸，并且由约10重量％至约33重量％的氧化镁（MgO）和约67重量％至约90重量％的氧化铝（Al 2 O 3）。
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