This product is a kind of non-metallic multi-function lightweight refractory, is metallurgy, petroleum, chemical, electrical, mechanical and other industries of the latest development of flame retardant, absolute refractory material. Widely used in light, intermediate heat preservation material products, casting industry cap mouth products; The cementing cement reducing agent is designed for oil well cementing and the development of a new product production, with a light specific gravity, high compressive strength, etc.