Properties: white or yellowish fine amorphous powder, smell-less, tasteless.
The proportion is 4.42-4.45, does not dissolve in water and alcohol, slightly soluble in ammonia, can dissolve in the diluted acid and the sodium hydroxide.
Quality Standard
|
ITEMS
|
INDEX
|
|
High-Class
|
First-Class
|
Qualified
|
|
Zn % ≥
|
57.5
|
57.0
|
56.5
|
|
Loss on dry
|
25.0-28.0
|
25.0-30.0
|
25.0-32.0
|
|
Pb content % ≤
|
0.04
|
0.05
|
0.05
|
|
Moisture ≤
|
2.5
|
3.5
|
5.0
|
|
So4 % ≤
|
0.60
|
0.80
|
-
|
|
Fineness through 75 um Screen ≥
|
95.0
|
94.0
|
93.0
|
|
Cd content % ≤
|
0.10
|
-
|
-
|
Zinc Carbonate usage:
1. used as corroxion inhibitor and desulpharization agent in oil explotiation,
2. activator and desulphurization agent in chemical fertilizer production
3. aslo widely used in paint and other chemical industry
4. rubber industires.
Packing: 25Kg Woven bag with P.P. bag
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