水泥窑用碱性耐火材料的性质 |
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种 类 |
A |
B |
C |
D |
E |
F |
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烧结白云石砖 |
含ZrO2烧 |
含ZrO2、镁白云石砖 |
含ZrO2烧结镁砖 |
镁尖 |
镁尖 |
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结白云石砖 |
晶石砖 |
晶石砖 |
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化学成分/% |
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MgO |
38.5 |
39 |
48 |
96 |
93 |
88 |
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CaO |
59.2 |
58 |
48 |
1 |
1 |
1 |
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SiO2 |
0.7 |
0.6 |
0.6 |
0.6 |
0.5 |
0.3 |
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Fe2O3 |
0.8 |
0.8 |
0.7 |
0.5 |
0.4 |
0.4 |
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Al2O3 |
0.5 |
0.5 |
0.5 |
0.2 |
4.5 |
10 |
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ZrO2 |
― |
2.7 |
1.8 |
1.8 |
― |
― |
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密度/g·cm-3 |
2.77 |
2.83 |
2.9 |
2.97 |
2.88 |
2.95 |
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气孔率/% |
17 |
16 |
15 |
16 |
17 |
16 |
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耐压强度/MPa |
60 |
45 |
50 |
50 |
45 |
40 |
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荷重软化温度/℃ |
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ta |
>1700 |
>1700 |
>1700 |
>1700 |
>1700 |
>1700 |
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t0.5 |
>1400 |
>1400 |
>1500 |
>1700 |
>1700 |
>1700 |
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热膨胀/% |
1.56 |
1.56 |
1.58 |
1.65 |
1.45 |
1.41 |
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1200℃ |
25 |
>30 |
>30 |
>30 |
>30 |
>30 |
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热震性(950℃ |
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~空冷)/次 |
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