What are the mineral composition and characteristics of high alumina fire brick?

High alumina fire brick is a refractory material with excellent performance. Έχει υψηλή αντοχή στη φωτιά, good wear resistance, and chemical stability. It is suitable for the construction and repair of various high-temperature industrial furnaces.

high alumina brick
high alumina brick

Mineral composition of high alumina fire brick

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

high alumina fire brick
high alumina fire brick

Characteristics of high alumina refractory bricks

πυρίμαχα τούβλα υψηλής αλουμίνας
πυρίμαχα τούβλα υψηλής αλουμίνας
  1. Ανυποταξία
    The refractory resistance of τούβλα υψηλής αλουμίνας is higher than that of clay bricks and semi-silica bricks, reaching 1750~1790℃, a high-grade refractory material.
  1. 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. Ωστόσο, because the mullite crystals do not form a network structure, the load-softening temperature is still not as high as that of silica bricks.
  2. Slag resistance
    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.