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Separating tin & lead, then making copper sulphate crystals from copper dust

June 25, 2013

Q. We have around 100 kilos of mixed metal powder. This powder contains copper 85%
Tin 9%
Lead 6%
Previously we were thinking to first treat this dust with sulfuric acid so that copper would form copper sulphate ⇦ this on eBay or Amazon [affil links] solution and tin and lead would form insoluble sulphates. We would separate tin and lead sulphates from copper sulphate solution and electrowin copper from copper sulphate solution. But later we changed our mind. And now we are thinking of making copper sulphate crystals from copper sulphate solution, instead of electrowinning copper from it.

Now, our problem is that first we want to economicaly separate tin and lead from this copper dust and then we want to make copper sulphate crystals with the copper dust.
Any help regarding this will be greatly appreciated

Adeeb Khan
- New Delhi, India