Fused Mullite is produced by the electric furnace fusion of Bayer process alumina and high purity silica. Controlled cooling of the molten mass ensures a high degree of mullitization characterized by well defined columnar crystals. The result is a needle-like alumina-silica grain.Fused mullite is a basic material for refractory materials used in the steel industry at precision  continuous casting, at the charging holes of various furnaces, at making burner-frames, for lining ladles and off-takes.

Fused Mullite.pdf