Place of Origin : Shijiahzuang,China

Item
Index

Excellent grade
First grade
Qualified grade

Content≥％
57.5
57.0
56.5

loss on ignition％
25-28
25-30
25-32

heavy metals ≤％
0.04
0.05
0.05

water≤％
2.5
3.5
5.0

Sulphate ≤％
0.6
0.8
-

Mesh 75UM≥％
95.0
94.0
93.0

Cd≤％
0.1
-
-