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Bauxite

Description

Calcined bauxite is a high-alumina material produced by sintering bauxite in rotary, round, or shaft kilns at high temperatures. This calcining (heating) process removes moisture and imparts high alumina content, refractoriness, low iron oxide levels, and high hardness.

Due to its high mechanical strength, resistance to molten slag, and thermal stability, calcined bauxite is an ideal raw material for the production of a wide range of refractory, abrasive, and specialty products.

Advantages

  • Physical and chemical stability – resistant to high temperatures and aggressive media, retains service properties throughout the entire life cycle.
  • High bulk density – ensures density and strength of finished refractory products, reducing shrinkage.
  • Low porosity and low water absorption – increase mechanical strength and resistance to cracking during thermal cycling.
  • Full and prolonged calcination – guarantees consistently high Al₂O₃ content, low impurity levels, and batch-to-batch stability.
  • Low impurity content – improves refractory properties and reduces defect formation in end products.

Applications

  • Primary raw material for the production of shaped and unshaped alumina refractory elements.
  • Extraction of pure aluminum.
  • Manufacture of ceramic products.
  • Production of welding electrodes.
  • Production of dyes.
  • Abrasive components.
  • Materials reducing the melting point of ore in ferrous metallurgy.
  • Filters for cleaning petroleum products from impurity particles and compounds.

FAQ

Calcined bauxite is high-alumina bauxite that has undergone high-temperature firing (calcination). Firing removes moisture, increases alumina content, and imparts refractoriness, hardness, and chemical stability.

Calcined bauxite combines high mechanical strength, resistance to molten slags, thermal stability, and low impurity levels, making it a versatile raw material for refractories, abrasives, and specialty products.

Main applications include: production of shaped and unshaped refractories, aluminum smelting, ceramics, welding electrodes, dyes, abrasives, metallurgical fluxes, and filters for cleaning petroleum products.