級 |
Zn質(zhì)量分子數(shù)不小于 % |
雜質(zhì)質(zhì)量分子數(shù)不大于 % | ||||
Cu |
Pb |
Fe |
As |
SiO2 | ||
一級品 |
55 |
0.8 |
1.0 |
6 |
0.2 |
4.0 |
二級品 |
50 |
1.0 |
1.5 |
8 |
0.4 |
5.0 |
三級品 |
45 |
1.0 |
2.0 |
12 |
0.5 |
5.5 |
四級品 |
40 |
1.5 |
2.5 |
14 |
0.5 |
6.0 |