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铝矾土熟料用作熔模铸造型壳耐火材料在国内已广泛采用。铝矾土型壳较之石英型壳有突出的优点:收缩膨胀系数小、高温结构强度高;和电熔刚玉型壳相比较,价格便宜七、八倍,而铸件质量不逊于电熔刚玉型壳。
Bauxite clinker used as investment casting shell refractory material has been widely used in China. Bauxite shell than the quartz shell has outstanding advantages: small shrinkage expansion coefficient, high temperature high structural strength; and fused corundum shell compared to seven or eight times cheaper, and the quality of castings is not inferior to fused corundum type shell.