Ceramic fiber is a fibrous lightweight refractory material with the advantages of light weight, high temperature resistance, good thermal stability, low thermal conductivity, small specific heat and resistance to mechanical vibration. Especially in the context of increasingly stringent industrial energy conservation and environmental protection controls in recent years, ceramic fibers, which can save 10-30% more energy than traditional refractory materials such as insulating bricks and castables, have been used more and more widely in China, and their development prospects are very promising. Be optimistic.
Ceramic fiber first appeared in 1941. The American company Babb and Wilcox used natural kaolin and melted and blown it into fiber using an electric arc furnace. After entering the 1990s, with the promotion and application of zirconium-containing fibers and polycrystalline alumina fibers, the use temperature increased to 1000℃~1400℃. However, due to product quality defects and backward application technology, good methods in the application field have been affected. limitations. For example, polycrystalline alumina fiber cannot be made into fiber blankets. The product specifications are single, mainly loose cotton and fiber blocks. Although the use temperature has increased, the strength is very poor, which limits the scope of use and shortens the service life.
Zirconium-containing fiber is a widely used and low-cost aluminum silicate fiber produced by the melting method. It can be widely used as a hot-face full-fiber lining for various thermal furnaces. At present, the quality of domestic products in this regard is And application development is still relatively backward. Nowadays, chromium-containing fibers appear abroad, and the service temperature is higher than zirconium-containing fibers, but there are no reports in this regard in China.
Ceramic fiber plays an important role in heat insulation and fire resistance in high-temperature industrial fields, but it also has great production drawbacks, especially its inhalability, which is harmful to the environment and human body. Currently, a biosoluble non-quality ceramic fiber appears in the thermal insulation and refractory materials market. This super fiber is a pollution-free and environmentally friendly material. Under the current situation of increasingly tightened industrial environmental protection regulations, pollution-free, refined and multi-functional will be the long-term development direction of ceramic fiber. In particular, the use of new processes and new raw materials to prepare functional fine ceramic fibers with high added value and high-tech content will have greater production opportunities.
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