Silicon nitride corundum casting refractory material for ironmaking blast furnace

A refractory casting silicon nitride-corundum material for blast furnace is prepared from refractory corundum as aggregate (60-85 mass%), silicon nitride powder (3-20 mass%), superfine alumina powder(3-15 mass%), calcium aluminate or high-Al cement binder (0.6-12 mass%), silicon carbide (0-8 mass%), metallic powder (0-8 mass%), dispersing alumina or others (0.5-1.5 mass%) and clean water (3.3-6 mass%) through mixing. It can be used as the refractory liner of blast furnace with high resistance to slag corrosion, alkali corrosion and melting of molten iron.