Hot Sale Mullite Brick for Sale in Sunrise Refractory

The mullite standard brick of Sunrise Refractory material is a high-alumina refractory material with mullite (3Al2O3·2SiO2) as the main crystalline phase. Generally, the alumina content is between 65% and 75%. In addition to mullite, the mineral composition contains a small amount of glass phase and cristobalite, and a higher amount of alumina also contains a small amount of corundum.

 

The mullite standard brick is an aluminum-silicon refractory product mainly composed of mullite crystal phase. Since the main crystal phase of mullite brick is mullite, the properties of mullite brick are: refractoriness is about 1850 ° C, load softening temperature is high, high temperature creep rate is low, thermal shock resistance is good, acid resistance is resistant. The slag is eroded, otherwise the mullite is decomposed; under the reducing atmosphere above 1370 °C, the mullite will also decompose; at a temperature higher than 1650 ° C, even if the reducing atmosphere is not resistant to a lower partial pressure of oxygen, Molai Stone will also decompose. Mullite bricks are mainly used in hot blast stoves, torpedo linings, ceramic kiln linings, enamels, kiln furniture and so on.

 

Mullite bricks are divided into sintered mullite bricks and fused mullite bricks. The sintered mullite brick is made of high alumina bauxite clinker as a main raw material, and a small amount of clay or raw bauxite is added as a binder, which is formed by molding and firing. The electric melting mullite brick is made of high alumina, industrial alumina and refractory clay, and is added with charcoal or coke fine particles as a reducing agent, and is formed by reduction electrofusion after molding. The crystal of fused mullite is larger than sintered mullite, and the thermal shock resistance is better than that of sintered products. Their high temperature performance depends mainly on the alumina content and the uniformity of the mullite phase and glass distribution.

Mullite is a kind of high-quality refractory raw material, which has the characteristics of uniform expansion, excellent thermal shock stability, high load softening point, low temperature creep value, high hardness and good chemical corrosion resistance. Electrofused mullite, ordinary fused mullite, all natural bauxite concentrate sintered mullite and light burned mullite.

 

Some characteristics of mullite bricks can affect the quality of the product, for example, whether the ratio of mullite particles to fine powder and other raw materials is as required. Mud mixing, trapping time, and mud moisture; bulk density of mullite brick body and smelting and sintering of mullite brick; alumina content, mullite phase; mullite physical and chemical indicators The requirements for the production of mullite bricks; the refractory temperature of mullite and the softening temperature of the load; whether the smelting method and the sintering method are strictly in accordance with the requirements for the production of mullite bricks.

 

Zhengzhou Sunrise Refractory Co., Ltd. has been producing and selling refractory materials for many years. Our years of experience have made us more professional. If you have any needs or questions about mullite bricks, please call Sunrise Refractory Co., Ltd.