|
|
ITEM
|
INDEX
|
||
|
Superior grade
|
First grade
|
Second grade
|
|
|
MgO %≥
|
95.0
|
93.0
|
92.0
|
|
Insoluble in Hcl solution %≤
|
0.10
|
0.20
|
-------
|
|
CaO %≤
|
1.0
|
1.5
|
2.0
|
|
Sulphate(SO4) %≤
|
0.20
|
------
|
------
|
|
Screening residues(through 150um mesh) %≤
|
0.03
|
0.05
|
0.20
|
|
Fe %≤
|
0.05
|
0.06
|
0.10
|
|
Mn %≤
|
0.003
|
0.010
|
-----
|
|
Chloride(Cl) %≤
|
0.035
|
0.10
|
0.15
|
|
Losses in ignition %≥
|
3.5
|
5.0
|
5.5
|
|
Accumulation density(g/ml) %≤
|
0.20
|
0.20
|
0.25
|