6.12 Write chemical reactions taking place in the extraction of zinc from zinc blend.
6.12 Write chemical reactions taking place in the extraction of zinc from zinc blend.
The steps involved in the extraction of zinc from zinc blende (ZnS) are as followed:-
- Concentration: the ore is crushed and then concentrated by froth floatation
- Roasting: the concentrated ore is heated in the presence of an excess of air at about 1200K to form zinc
- ZnS + 3 O2 → 2 ZnO + 2 SO2
- Reduction:
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