Mullite stone brick refers to the high aluminum refractory material with mullite stone as the main crystalline phase. General alumina content is between 65% and 75%. In addition to Mulite, the lower alumina also contains a small amount of glass phase and square quartz, and a small amount of corundum. It is mainly used in hot air furnace furnace top, blast furnace furnace body and furnace bottom, glass melting furnace heat storage chamber, ceramic sintering kiln, petroleum cracking system dead corner furnace lining, etc.

Murray stone brick has a high fire resistance, up to more than 1790℃. The starting temperature of load softening is 1600 to 1700℃. Compressive strength at normal temperature is 70~260MPa. Good heat and shock resistance. There are sintered stone brick and electric molten stone brick. Sintered Mullite stone brick with high bauxite clinker as the main raw material, add a small amount of clay or bauxite as a binding agent, after molding, burning and made. Electromelt mullite stone brick with bauxite, industrial alumina and refractory clay as raw materials, add charcoal or coke fine particles as a reducing agent, after forming the reducing electromelting method to manufacture. The crystal of electromelt stone is larger than sintering stone, and the thermal shock resistance is better than sintering products. Their high temperature properties mainly depend on the content of alumina and the uniformity of the distribution of mullite phase and glass.

With the world's increasing requirements for energy conservation, the development of lightweight thermal insulation materials is developing rapidly. Lightweight Mo stone brick is one of the ideal insulation refractory materials at home and abroad, with good chemical stability, high temperature resistance, high size precision, uniform structure, beautiful appearance, low thermal conductivity characteristics. It is widely used in hot air furnace, glass crucible, metal furnace, ceramic tunnel kiln, roller kiln, electric porcelain spindle kiln, etc., and has a broad market prospect. According to the requirements of special refractory factory, using compound additive embers method development and production of lightweight mo to stone brick material selection fine, high temperature, can direct contact with the flame, low production cost, simple manufacturing process, energy saving effect, product performance and quality basic reached the international advanced level in the 90s, although the development time is short, but has won the praise of many users.