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Bauxite

Sibelco PORTALUM calcined bauxite delivers a range of benefits in coatings and polymer applications, from friction through to chemical and abrasion resistance.

Sibelco Minerals - Abrasive Scorex 01
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Bauxite


Sibelco PORTALUM calcined bauxite (aluminium oxide) is produced from Refractory Agglomerated Super Calcined (RASC) bauxite. The main constituent is the mineral corundum.

PORTALUM calcined bauxite can be characterised by: 

  • high inertness in various media
  • high Mohs hardness of 8.5
  • high refractive index of 1.64
  • high density and low oil absorption

The addition of PORTALUM enhances abrasion and chemical resistance in coatings, whilst its high hardness and density are valued in abrasive / friction applications such as brake pads.

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