High Alumina Insulating Brick

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High Alumina Insulating Brick – What Is It?

  • High alumina insulating brick are manufactured using bauxite, which is a naturally occurring substance that comprises aluminum hydroxide (Al[OH]3) and kaolinitic clays.
  • Raw materials undergo roasting, resulting in a blend of synthetic alumina and mullite, which is an aluminosilicate mineral with the chemical formula 3Al2O3 · 2SiO2.
  • High alumina refractories are characterized by the presence of alumina ranging from 50 to 87.5 percent, according to the definition.
  • At high temperatures and in basic environments, they exhibit greater endurance than fireclay refractories.
  • Furthermore, they demonstrate improved volume stability and resistance to abrasion.
  • High-alumina bricks find application in blast furnaces, blast-furnace stoves, and liquid-steel ladles.

The Applications Of High Alumina Insulating Bricks

Light weight insulating bricks High alumina insulating bricks find various significant applications as listed below:

  • Used for lining muffle furnaces and crucible furnaces
  • Foundries extensively use them for lining furnaces and kilns
  • These are employed for the lining of EAFs, IFBs, blast furnaces, and other similar applications
  • Their high strength and hardness make them appropriate for applications such as rocket engine nozzles and missile nose cones
  • They can be used in ceramic kilns, furnaces for manufacturing pyrometric cones, among others
  • Glass melting furnaces and annealing lehrs utilize them