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Brief introduction of high alumina brick
High alumina bricks are aluminosilicate based refractories containing more than 48% alumina. It is made of bauxite raw materials or high Al2O3 materials, with high thermal stability and fire resistance above 1770 ℃. Good slag resistance.
Features of high alumina brick
- Heat resistance.
- Resistance to chemical attack.
- Thermal stability.
- Resistance to residue.
Parameters of high alumina brick
| Item/Grade | SK-36 | SK-37 | SK-38 | SK-40 |
| AL2O3% (≥) | 55 | 65 | 70 | 82 |
| Fe2O3% (≤) | 2 | 2 | 2 | 2 |
| Refractoriness(SK) | 36 | 37 | 38 | 40 |
| Refractoriness underload, 0.2MPa, °C (≥) | 1450 | 1480 | 1530 | 1600 |
| Apparent porosity (%) | 20-23 | 20-23 | 20-22 | 18-20 |
| Bulk density (g/cm³) | 2.25-2.4 | 2.3-2.5 | 2.4-2.6 | 2.5-2.7 |
| Cold crushing strength ,MPa (≥) | 45 | 50 | 60 | 70 |
Application of high alumina brick
The characteristics of high alumina bricks are mainly shown in high temperature resistance, chemical internal erosion resistance, good thermal shock performance, etc. Excellent performance is used in cement glass building materials industry, steel smelting industry, petrochemical industry and other industries.