The heat resistance and heat preservation mechanism of aluminum silicate refractory fiber, like other refractory materials, is determined by its own chemical and physical properties. Aluminum silicate refractory fiber has white color, loose structure, soft texture. Its appearance is like cotton wool which is an important condition for its good heat insulation and heat preservation performance.
The thermal conductivity of aluminum silicate refractory fiber is only one third of that of refractory concrete under 1150℃, so the heat conduction through it is very small. Its weight is only about one-fifteenth of ordinary refractory bricks, and its heat capacity is small, and its own heat storage is very small. The aluminum silicate refractory fiber is white and soft, and has a high reflectivity to heat. Most of the heat radiated to the refractory fiber is reflected back. Therefore, when the refractory fiber is used as the lining of the heat treatment furnace, the heat in the furnace are concentrated on the heated workpiece after several times reflection. At the same time, the aluminum silicate refractory fiber is like cotton which has soft texture and is light and elastic, and has stable performance at high temperatures. It can withstand sudden changes in cold and heat without cracking, and has good insulation and noise reduction properties, and its chemical stability is also very good.
From a thermal point of view, aluminum silicate refractory fiber also has good high temperature performance. Because the main mineral composition of kaolin used to make refractory fibers is kaolinite (Al2O3·2SiO2·2H2O). The refractoriness of kaolin is generally higher than that of clay, and its refractory temperature is closely related to its chemical composition.
Next issue we will continue to introduce application of aluminum silicate refractory fiber in industrial furnaces. Pls stay tuned!
Post time: Sep-06-2021
