... Flint clayIt is made from alumina oxide powder and high-grade kaolin.1) High refractoriness.2) Aluminum content high, the ... to move iron and spraying drying etc. Water-washed kaolin has been used very effectively as functional filler in ... ceramic and so on. Calcined flint clay is mainly used for manufacturing high-quality refractory products, refractory castable, sagger, kiln furniture, crucibles, ...