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Brief introduction of magnesia alumina spinel brick
Magnesia alumina spinel brick is an alkaline refractory product with kaolin as the main phase and magnesia alumina spinel clinker as the basic raw material. The product has good temperature vibration, good strength and volume stability under high temperature environment.
Application of magnesia alumina spinel brick
- Magnesia alumina spinel brick can be used in cement kiln, which not only avoids chromium pollution, but also has good anti stripping performance.
- It can be used for refractory frame of ladle, greatly improving the corrosion resistance. It is widely used as refractory for steelmaking. The preparation of high-quality preheating spinel provides a new material for amorphous and fixed high-purity refractories.
Parameters of magnesia alumina spinel brick
| Iterms | KRSH-1 | KRSH-2 | KRSH-3 | KRSH-4 |
| МgО％, ≥ | 88 | 86 | 84 | 82 |
| Аl2О3％, ≥ | 6 | 9 | 9 | 8 |
| SiО2％, ≥ | 0,5 | 0,5 | 0,8 | 1,0 |
| Bulk density, g/cm3 | 2.9 | 2.9 | 2.85 | 2.8 |
| Open porosity,%, ≤ | 18 | 18 | 19 | 20 |
| Compressive strength, N/mm², ≥ | 60 | 60 | 50 | 45 |
| Softening onset temperature, ℃, ≥ | 1700 | 1700 | 1680 | 1650 |
| Thermal resistance, ≥, times | 10 | 10 | 10 | 10 |
| Thermal conductivity, 1000℃, W/m K | 2.9 | 2.9 | 2.8 | 2.7 |