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Brief description of high alumina brick
High alumina brick usually refers to the refractory brick with Al2O3 content of more than 48%. It is mainly made of natural senior bauxite clinker as raw material, adding soft or semi-soft clay as binder to form mud, and then forming, drying and firing a refractory brick. High alumina brick refractoriness at 1770℃, load softening temperature at 1420℃-1550℃. High alumina bricks are mainly used for lining blast furnace, hot blast furnace, electric furnace top, blast furnace, reflector furnace and rotary kiln.
Features of high alumina brick
- High temperature resistance.
- Resist chemical erosion.
- Thermal stability.
- Anti-scum.
More relevant refractory products: High alumina insulating fire bricks
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 |