Nile For Refractories increases its Investments and its Mineral Resources
Chemically Bonded High – Alumina Bricks 70% Al₂O₃
Chemically Bonded High - Alumina Bricks are produced for require an exceptionally inert, strong, dense refractory bricks capable of performing at very high tempratures.
These High Alumina, Phosphate Bonded Bricks - 70% Al₂O₃ are ideally suited to steel ladle for molten aluminium furnace applications due to their unique chemistry, including special aggregates and additives. It can be applied to electric arc furnace roofs, aluminum melting furnaces, reheating furnac bottom, burner blocks and others.
| Chemical Composition | Chemically Bonded-High Alumina bricks 85% Al₂O₃ | |
| SiO₂ | 8.00 – 10.00 | % |
| Al₂O₃ | 82.00 – 85.00 | % |
| TiO₂ | 3.10 – 3.20 | % |
| Fe₂O₃ | 1.00 – 1.40 | % |
| CaO | 0.20 – 0.30 | % |
| MgO | 0.05 – 0.10 | % |
| Na₂O + K₂O | 0.10 – 0.20 | % |
| P₂O₅ | 2.00 – 3.00 | % |
| Physical and Thermo-Mechanical Proporities | Chemically Bonded-High Alumina bricks 85% Al₂O₃ | |
| Bulk Density | 2.85 – 2.95 | g/cm³ |
| Apparent Porosity | 12 – 16 | % |
| Modulus of Rupture | 200 – 300 | kg/cm² |
| Cold Crushing Strenght | 900 – 1100 | kg/cm² |
| Linear Thermal Expansion at 1350 °C | 0.20 – 0.40 | % |
| Refractoriness | >1850 | °C |
