等級(jí) |
規(guī)格 |
耐火度/℃ |
均勻度/% |
SiO2/% |
Fe2O3/% |
含泥率/% |
含粉量/% |
莫氏硬度 |
Ⅰ |
4~100(目) |
1750 |
90 |
≥99.9 |
≤0.05 |
≤0.1 |
0.01 |
7 |
Ⅱ |
90 |
≥99.0 |
≤0.10 |
≤0.1 |
0.01 |
7 | ||
Ⅲ |
90 |
≥98.5 |
≤0.80 |
≤0.1 |
0.01 |
7 | ||
Ⅳ |
90 |
≥98.0 |
≤0.20 |
≤0.1 |
0.01 |
7 |