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A copper ore has been mined that contains 10 wt % soluble copper sulfate with the...

A copper ore has been mined that contains 10 wt % soluble copper sulfate with the remainder of this stream an insoluble gangue. We wish to leach 12,000 kg/hr of this ore in a counter-current process, using water as the leachate. We wish to recover 95% of the copper sulfate in the overflow from stage one of this cascade. Calculate the required water feed rate for cascades with 1, 2, 5 and 10 stages. In all cases assumes that the underflow stream contains 25 weight % water on a solute free basis.

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