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Fire Clay Brick
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项目 |
理化指标 Physical and Chemical Specifications |
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三低粘土砖 |
低气孔粘土砖 |
普通粘土砖 |
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DDD |
DN-12 |
DN-15 |
DN-17 |
N-1 |
N-2a |
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Al2O3 % |
≥46 |
≥45 |
≥42 |
≥40 |
≥42 |
≥40 |
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Fe2O3 % |
≤1.1 |
≤1.2 |
≤1.5 |
≤2.0 |
≤1.8 |
≤2.2 |
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显气孔率 |
≤10 |
≤12 |
≤15 |
≤17 |
≤22 |
≤24 |
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体积密度g/cm³ |
≥2.4 |
≥2.37 |
≥2.3 |
≥2.25 |
≥2.15 |
≥2.1 |
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常温耐压强度MPa |
70 |
70 |
60 |
50 |
30 |
25 |
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重烧线变化 1400℃×2h |
— |
-0.1/+0.05 |
-0.2/+0.0 |
-0.3/+0.0 |
-0.4/+0.1 |
-0.5/+0.1 |
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0.2MPa荷重软化温度 ℃ |
≥1520 |
≥1500 |
≥1470 |
≥1420 |
≥1400 |
≥1350 |
The high alumina is divided into different kinds according to the alumina content and usage, they are widely used in glass furnace, metallurgy, electric furnace, cement kiln and other heat-engineering equipments.