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Calcined bauxite (aluminium oxide) is produced from Refractory Agglomerated Super Calcined (RASC) bauxite. The main constituent is the mineral corundum. Calcined bauxite can be characterised by:
- High Mohs hardness of 8.5
- High inertness in various media.
[g/ 100 g]
Production location Portalum
Portalum B is the brand name of Sibelco’s calcined bauxite grade for coatings applications.
- Excellent abrasion resistance: due to its hardness of 8.5 on Mohs scale, calcined bauxite will increase the coating’s resistance to wear.
- Chemical resistance: due to its inert nature, calcined bauxite provides good chemical resistance compared to conventional fillers.