项目 |
SiO2% |
Al2O3% |
Fe2O3% |
CaO+MgO% |
K2O+Na2O% |
灼减 |
Ⅰ |
≥92 |
1.2 |
1.2 |
1.5 |
0.2 |
1.2 |
Ⅱ |
≥90 |
1.5 |
1.2 |
1.7 |
0.3 |
1.3 |
Ⅲ |
<90 |
1.6 |
1.5 |
2.1 |
0.5 |
1.5 |
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