粒径/mm |
9.3~4.75 |
4.75~2.36 |
2.36~1.18 |
1.18~0.6 |
0.6~0.3 |
0.3~0.15 |
0.15~0.075 |
<0.075 |
含量/wt% |
1 |
30 |
20 |
20 |
10 |
7 |
5 |
7 |