|
Iron Oxide
Iron oxide product
(Fe2O3) is made by calcining, with mist
spray, ferrous chloride salt coming from waste acid solution
from cold rolling-pickling process of Ma Steel's cold rolling
plant. The product appears to be brownish-red powdered
substance, suitable for making magnetic material like ferrite
and stain for paint, etc.
Indexes of chemical analysis
|
Item
|
Index
Value
|
|
Grade
I
|
Grade
II
|
Grade
III
|
|
Iron oxide (Fe2O3),
% not less than
|
99.3
|
98.6
|
98
|
|
Silicon oxide
(SiO2),
% not more than
|
0.012
|
0.022
|
0.04
|
|
Aluminum oxide
(Al2O3),
% not more than
|
0.01
|
0.05
|
0.08
|
|
Manganese oxide
(MnO), % not more than
|
0.25
|
0.28
|
0.28
|
|
Calcium oxide (CaO),
% not more than
|
0.02
|
0.04
|
0.06
|
|
Sulphate
(considered in the form of SO4-2)
not more than
|
0.1
|
0.1
|
0.15
|
|
Chloride (Cl-),
% not more than
|
0.15
|
0.2
|
0.2
|
|
Water (H2O),
% not more than
|
0.5
|
0.5
|
1
|
|
Ferrous oxide (FeO),
% not more than
|
0.4
|
0.4
|
0.4
|
กก
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