Main introduction of the High alumina bricks
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.Index | Item | ||||
LZ-70 | LZ-65 | LZ-55 | LZ-48 | ||
Al2O3 ,%≥ | 70 | 65 | 55 | 48 | |
Refractoriness, ℃≤ | 1790 | 1770 | 1750 | ||
0.2Mpa refractoriness under load, ℃≤ | 1520 | 1500 | 1470 | 1420 | |
Reheating linear change, % | 1500℃,2h |
0.1 -0.4 |
- | ||
1450℃,2h | - |
0.1 -0.4 |
|||
Apparent porosity, %≤ | 23 | 22 | |||
Compress strength, MPa≥ | 53.9 | 49 | 44.1 | 39.2 |
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