High Alumina Brick for Glass Melting Furnace

Brief description of high alumina brick

High alumina brick is a kind of refractory, and its main component is Al2O3.
It is a neutral refractory with alumina content above 48%. It is formed by shaping and calcining bauxite or other raw materials with high alumina content. The thermal stability is high, and the fire resistance is higher than 1770 ℃. It has good slag resistance and is used for lining of electric steelmaking furnace, glass melting furnace, cement rotary furnace, etc.

Features of high alumina brick

  1. Fire resistance
    The refractoriness of high alumina brick is higher than that of clay brick and semi silica brick, reaching 1750~1790 ℃. It is a kind of high-grade refractory.
  2. Load softening temperature
    Due to the high content of Al2O3 in high alumina products, less impurities and less fusible glass bodies, the load softening temperature is higher than that of clay bricks. However, since mullite crystals have not yet formed a network structure, the load softening temperature is still lower than that of silicon bricks.
  3. Slag resistance
    High alumina bricks contain more Al2O3, which is close to neutral refractories, and can resist the corrosion of acidic slag and alkaline slag. Because it contains SiO2, the resistance to alkaline slag is weaker than that to acidic slag.

More relevant refractory products: High aluminum fire resistant ball

Parameters of high alumina brick

AL2O3% (≥)55657082
Fe2O3% (≤)2222
Refractoriness underload, 0.2MPa, °C (≥)1450148015301600
Apparent porosity (%)20-2320-2320-2218-20
Bulk density (g/cm³)2.25-2.42.3-2.52.4-2.62.5-2.7
Cold crushing strength ,MPa (≥)45506070