Properties of the Product: Mullite bricks for blast furnaces were made from fused or sintered mullite, being high pressure pressed and sintered in high temperature, main minerals are mullite stones. These products have the peoperties of low porosity, high RUL, excellent creep result and anti chemical erosions. They were used as super grade refractory materials for hot blast stoves as well as one of the ceramic cup materials for large blast furnaces .