Low Creep High Alumina Bricks
- Description
-
The low creep high alumina brick used in hot blast furnace is mainly made of high quality bauxite, white corundum, mullite and "three stones". Combined with compound ultrafine powder and admixture. It is formed by high pressure forming and sintering at high temperature. It is mainly used for the upper masonry of the air furnace. It has the characteristics of high temperature resistance, high compressive strength, high load softening starting temperature, high temperature volume stability and excellent creep performance.
General Properties
Chemical Analysis Item Standard DRL-155 DRL-150 DRL-145 DRL-140 DRL-135 Al2O3 ≥75% ≥75% ≥65% ≥65% ≥65% Physical Properties
Item Unit Standard DRL-155 DRL-150 DRL-145 DRL-140 DRL-135 Apparent Porosity （%） ≤20 ≤21 ≤21 ≤22 ≤22 Bulk Density (g/cm³) 2.65-2.85 2.65-2.85 2.50-2.70
2.40-2.60 2.35-2.55 Cold Crushing Strength （MPa） ≥60 ≥60 ≥60 ≥55 ≥55 Creep Rate T0.2
% ≤0.8
1500℃×50h
≤0.8
1500℃×50h
≤0.8
1450℃×50h
≤0.8
1450℃×50h
≤0.8
1350℃×50h
Permanent Linear Change （%） -0.2~0.1
1550℃×2h
-0.2~0.1
1500℃×2h
-0.2~0.1
1500℃×2h
-0.2~0.1
1450℃×2h
-0.4~0.1
1450℃×2h
Keywords：
Steel
Low Creep High Alumina Bricks
Refractory materials
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