|
级 别
|
MgO,%
|
SiO2%
|
CaO,%
|
Fe2O3
|
块度,%
|
| 一级 |
≥46
|
≤2.5
|
≤0.8
|
≤0.7
|
50-350
|
| 二级 |
≥45
|
≤4.5
|
≤1.0
|
≤1.0
|
50-350
|
| 三级 |
≥44
|
≤6.0
|
2.0
|
≤1.0
|
50-350
|