Refractory fiber, also known as ceramic fiber, is a type of artificial inorganic non-metallic fiber material, which is a binary compound of glass phase or crystalline phase mainly composed of AL2O3 · SiO2. As a lightweight refractory insulation material, it can save 15% · 30% energy in industrial furnaces and kilns. The technical parameters and indicators of refractory fibers have the following good characteristics

(1) High temperature resistance. The usage temperature of ordinary aluminum silicate refractory fibers is 1200 ℃, while the usage temperature of special refractory fibers such as alumina fibers and mullite can reach as high as 1600~2000 ℃. However, the refractory temperature of Yibang's fiber materials such as asbestos and rock wool is only around 650 ℃

(2) Thermal insulation. The thermal conductivity of refractory fibers at high temperatures is very low. The thermal conductivity of ordinary aluminum silicate refractory fibers at 1000 ℃ is only 1/5 of that of refractory clay bricks and 1/3 of that of lightweight clay bricks. Moreover, the thermal capacity is small and the insulation efficiency is high. In the design, the thickness of the furnace lining can be reduced by about half compared to refractory bricks.

(3) Chemical stability, except for strong alkalis and hydrofluoric acid, almost unaffected by any chemical agents, steam, or oils. It does not react with acids at room temperature and does not wet molten aluminum, copper, lead, and their alloys at high temperatures.

(4) Thermal shock resistance. Refractory fibers have soft and elastic properties, good resistance to thermal shock and rapid cooling. In the design of refractory fiber furnace lining, the influence of thermal stress may not be considered, and the insulation and sound insulation performance of refractory fibers are also relatively good. For sound waves ranging from 30 to 300Hz, its sound insulation performance is superior to commonly used sound insulation materials.