Quelle est la composition minérale et les caractéristiques des briques réfractaires à haute teneur en alumine?

La brique réfractaire à haute teneur en alumine est un matériau réfractaire offrant d'excellentes performances. Il a une haute résistance au feu, bonne résistance à l'usure, et stabilité chimique. It is suitable for the construction and repair of various high-temperature industrial furnaces.

Mineral composition of high alumina fire brick

High-alumina fire brick is mainly composed of high-alumina bauxite containing hydrous alumina minerals (monophane, gibbsite, etc.): sillimanite group minerals (including kyanite, andalousite, sillimanite, etc.); Artificial synthetic raw materials, such as industrial alumina, synthetic mullite, fused corundum, etc..

Characteristics of high alumina refractory bricks

1. Résistance
   The refractory resistance of briques à haute teneur en alumine is higher than that of clay bricks and semi-silica bricks, reaching 1750~1790℃, a high-grade refractory material.

2. Load softening temperature
   Because high-aluminum products have high AI203, low impurities, and less fusible glass, the load-softening temperature is higher than that of clay bricks. Cependant, because the mullite crystals do not form a network structure, the load-softening temperature is still not as high as that of silica bricks.
3. Résistance aux scories
   High alumina bricks contain more AI203, which is close to neutral refractory materials and can resist acidic and alkaline slag erosion. Because it contains Si02, its ability to resist alkaline slag is weaker than that of acidic slag.