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High alumina brick refers to fire brick containing Al2O3 more than 48%, which is made of high grade bauxite through high temperature calcinations. High alumina brick is a kind of neutral refractory material so that it enjoys excellent resistance to acid and alkali corrosion. It has characteristic of high refractoriness under load, which decide high alumina brick is a n ideal material for various kinds of industrial furnace. It is widely used in building lining of hot-blast stove, blast furnace, coke oven, rotary kilns of cement and so on.
| Item | Fireclay brick | High Alumina Brick | ||||
| SK32 | SK34 | SK35 | SK36 | SK37 | SK38 | |
| Al2O3 (%) ≥ | 38 | 42 | 48 | 55 | 65 | 75 |
| Refractoriness (oC) ≥ | 1670 | 1730 | 1750 | 1770 | 1790 | 1790 |
| Refractoriness under Load, oC,0.2MPa ≥ | 1250 | 1300 | 1420 | 1470 | 1500 | 1520 |
| Linear Change(%), oC×2h | 1350 | 1350 | 1450 | 1500 | 1500 | 1500 |
| -0.5~0 | -0.5~0 | -0.4~+0.1 | -0.4~+0.1 | -0.4~+0.1 | -0.4~+0.1 | |
| Porosity (%)≤ | 26 | 26 | 22 | 22 | 23 | 23 |
| Cold Crushing Strength, MPa≥ | 15 | 20 | 39.2 | 44.1 | 49 | 53.9 |
