Ceramic fiber is a kind of heat insulation and high temperature resistant material widely used in all kinds of thermal kilns. Because its capacity is large and lower than other refractory materials, it has little heat storage and obvious heat insulation effect. As a lining material, it can greatly reduce the energy consumption of thermal kilns and bring a revolution to thermal kilns in terms of energy saving. On the other hand, because the physical properties of ceramic fiber are less than those of traditional refractory materials, Therefore, its application technology and method have also brought a revolution to the masonry of thermal kilns.

The industrial production of ceramic fiber began in the late 1970s. In the 1980s, the application of ceramic fiber was rapidly promoted, but it was mainly used in the temperature range below 1000 degrees. The application technology was simple and backward. In the 1990s, with the development of zirconium containing fiber and the application and promotion of polycrystalline alumina fiber, the application temperature was increased to 1000 degrees to 1400 degrees. However, due to the defects of product quality and the backwardness of application technology, The application fields and methods are limited. For example, polycrystalline alumina fiber (or mullite) fiber can not be made into fiber blanket, and the product specification is single, up to loose cotton, mixed fiber or fiber block. Although the service temperature of the product has increased, the strength of the product is very poor, which limits the scope of application and shortens the service life. In recent years, high-temperature thermal insulation materials have increasingly applied various ceramic fiber products in the iron and steel industry abroad, Its application scope is also expanding. The ceramic fiber lining used in various industrial furnaces can save energy by 20%-40%, reduce the dead weight of industrial furnaces by 90%, and reduce the weight of steel structures by 70%.

At the same time of popularizing the use of ceramic fiber furnace lining, the application technology of ceramic fiber has also made great progress. It is predicted that if the products and application technology under ceramic fiber continue to be improved and try to keep the performance of ceramic fiber furnace lining before use, the energy consumption of high-temperature industrial furnace with ceramic fiber furnace lining can be reduced by about 4%, Due to the application of polycrystalline alumina fiber and polycrystalline mullite fiber, the current service temperature of ceramic fiber furnace lining has reached 1500 ~1600 ℃