Refractory fiber 800 of forsterite

The present invention discloses a flame resistant fibers 800 of forsterite, wherein the mass percentage is as follows:? SiO2 40-60%, MgO? 30-50%, other impurities content not higher than 10%. In the present invention, forsterite and silica sand as a raw material, the resulting aluminosilicate refractory fiber-based refractory fibers may alternatively, and, may be dissolved in the body fluids, can also break down, emissions, reducing harm to human body, increase the production and use of security; and having a sufficiently high temperature resistance and structural strength, and the refractory temperature reached 800 degrees.