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| 热风炉用粘土质耐火砖 |
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项目
指标
品种 |
普
通 型 |
低
蠕 变 型 |
|
RN-42 |
RN-40 |
RN-36 |
RD-40 |
RD-42 |
|
规格值 |
典型值 |
规格值 |
典型值 |
规格值 |
典型值 |
规格值 |
典型值 |
规格值 |
典型值 |
|
化学
成分 |
Al2O3% |
≥42 |
43.26 |
≥40 |
41.19 |
≥36 |
37.51 |
≥40 |
45.18 |
≥42 |
47.23 |
|
Fe2O3% |
|
1.9 |
|
2.0 |
|
2.0 |
≤2.0 |
1.7 |
≤2.0 |
1.6 |
|
R2O |
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≤1.0 |
0.52 |
≤1.0 |
0.48 |
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体积密度g/cm3 |
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|
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≥2.10 |
2.23 |
≥2.25 |
2.29 |
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显气孔率 % |
≤24 |
22 |
≤24 |
22 |
≤26 |
24 |
≤21 |
20 |
≤22 |
19 |
|
常温耐压MPa |
≥29.4 |
35 |
≥24.5 |
32 |
≥19.6 |
28 |
≥40 |
50 |
≥40 |
55 |
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常温抗折MPa |
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≥8 |
10 |
≥10 |
12 |
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重烧线变化% |
1450℃×2h
0～0.4 |
-0.3 |
1350℃×2h
0～0.3 |
-O.1 |
1350℃×2h
0～0.5 |
-0.2 |
1400℃×4h
±0.2 |
-0.1 |
1400℃×4h
±0.2 |
-0.1 |
|
耐火度 ℃ |
≥1750 |
1750 |
≥1730 |
1730 |
≥1690 |
1710 |
≥1750 |
1750 |
≥1750 |
1750 |
|
荷软0.2MPa℃0.6% |
≥1400 |
1420 |
≥1350 |
1370 |
≥1300 |
1340 |
≥1420 |
1440 |
≥1450 |
1460 |
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蠕变率%0.2Mpa20-50h |
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1200℃
≤0.2 |
0.170 |
1250℃
≤0.2 |
0.160 |
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