| 摘要 |
A thermally stable refractory article and method of forming the same is provided. The refractory article comprises a mixture of fine and coarse silica sands containing from trace amounts up to about 10 weight percent alumina and a binder therefor. Preferably the fine silica sand has a particle size ranging from about 0.06 to about 0.10 mm while the coarse silica sand has a particle size of up to about 3.0 mm. The binder is a silica-alumina clay. Preferably it contains in weight percent from about 55 to about 60 percent silica and from about 22 to about 40 percent alumina, plus incidental impurities.
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