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Brief introduction of high alumina bricks
High alumina brick usually refers to the refractory brick with Al2O3 content of more than 48%, which is mainly made of natural high-grade aluminum clinker as raw material, added soft or semi soft clay as the binder in the mud, and fired after molding and drying.
Application of high alumina bricks
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.
More relevant refractory products: Ceramic fiber cloth
Parameters of high alumina bricks
| 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 |
Also, we have SK30, SK32, SK34, SK35 refractory clay bricks to choose. Their aluminum content is lower than high alumina bricks, and the use temperature is lower, but the price is cheaper. If your kiln is not demanding, you can also choose refractory clay bricks.