Mullite insulation brick refers to a kind of high alumina refractory material with mullite as the main crystalline phase. Mullite brick has a high refractoriness and can reach more than 1790. It is mainly used to manufacture thermal insulation layer of high temperature stove, heater and industrial kiln. It has excellent high temperature resistance, high temperature stability and thermal conductivity at high temperatures, so it is often used in the core of high temperature furnaces, such as furnaces, nozzles, high temperature air and fuel ducts.

The advantages of mullite insulation bricks are its high temperature stability, wear resistance and corrosion resistance. It can still maintain its original structure and performance at high temperatures, without deformation, cracking or shrinkage, and can resist the erosion of various chemical substances. In addition, mullite insulation bricks also have low thermal conductivity, which can effectively reduce heat loss and improve the energy efficiency of the furnace.