As the name implies, asbestos is "cotton" that grows in stones. In fact, it is a fibrous mineral, which is very different from cotton. Asbestos are all silicates. They all contain silicon and oxygen. Different asbestos ores also contain different metals such as calcium, iron, magnesium and sodium. In Greek, asbestos means "something that cannot be destroyed by fire". China called it "fire cloth" in ancient times, which is a kind of cloth that is not afraid of fire. Because this kind of cloth is dirty, it will be clean after baking with fire. Asbestos has been used for thousands of years. As early as the Spring and Autumn Period and the Warring States Period in China, Liezi recorded: "The cloth washed by fire will be thrown into the fire, and the cloth will be dyed by fire. If there is a fire, you will be suspicious of snow. " It shows that the working people in China used asbestos cloth to prevent fire at that time. With the development of human science and technology for thousands of years, asbestos, as an industrial raw material or material, is more widely used and important. At present, there are nearly 3000 kinds of asbestos products or products containing asbestos, which are used by more than 20 industrial departments. Among them, the more important are automobile, tractor, chemical industry, electrical equipment and other manufacturing departments. Advanced asbestos fiber is mainly used in textile yarn, thread, rope, cloth, packaging and so on. As the material or lining of transmission, heat preservation, heat insulation and other parts, low-grade asbestos fiber is widely used in the construction industry, mainly used to make asbestos board, asbestos paper fire-proof board, insulation pipe and kiln pad, as well as heat preservation, heat insulation, heat insulation and sound insulation materials. Asbestos fiber can be mixed with cement to make asbestos cement products such as asbestos cement tiles, boards, roof panels and asbestos pipes, which are widely used in various construction projects to replace a large number of steel products. Asbestos and asphalt can be mixed to make asbestos asphalt products, such as asbestos asphalt board, cloth (linoleum), paper, brick, liquid asbestos paint, putty for filling cement pavement and expansion cracks, etc. It can be used as waterproof, heat preservation, heat insulation, acid and alkali resistant materials for advanced buildings and necessary materials for traffic engineering.