Ceramic Fiber product, also called aluminum silicate Fiber product, it is a kind of fibriform and light weight refractory. It possesses the performances and advantages of high temperature resistance, light, excellent thermal stability, low heat conductivity and small thermal capacitance mechanical vibration resistance etc. At present, it has found an increasingly wide utilization in the fields of metallurgy, building materials, machinery, petroleum, chemical engineering, shipping, electric power and traffic conveyance and so on. Also it is used in high-tech field such as the space navigation and atomic energy and so on. So the ceramic Fiber product is a kind of heat preservation material which is developed rapidly comparatively.