Calcined Bauxite
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Product Benefits
Technical Details
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.
Basic properties
| Property | Value | Unit |
| Moisture | 0.1 | [%] |
| Hardness (Mohs) | 8.5 | [-] |
| Colour | dark grey | [-] |
| Density | 3.8 | [kg/ dm3] |
Product overview
| Product | Grade | D50
[µm] |
D97
[µm] |
OA
[g/ 100 g] |
| Portalum | A25 | 10 | 41 | 13 |
Production location Portalum
Portalum B is the brand name of Sibelco’s calcined bauxite grade for coatings applications.
Benefits
- 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.
