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Brief introduction of high alumina brick
High alumina brick is a kind of refractory material, the main component of this refractory brick is Al2O3. High alumina brick is a neutral refractory containing more than 48% alumina. It is made of bauxite or other raw materials with higher alumina content by molding and calcination. High thermal stability, refractories above 1770℃. Good slag resistance, used in the lining of steel furnace, glass furnace, cement converter, etc.
Features of high alumina brick
High fire resistance
No deformation
A regular shape
Good cracking resistance
No spalling and strong erosion resistance
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 |
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