Abstract
Mechanical activation by autogenous milling has previously been shown to improve leaching kinetics. In this study autogenous milling was conducted simultaneously with ferric chloride leaching. A sequence of products was observed, with chalcopyrite being replaced by synthetic nantokite (CuCl) and the nantokite being more gradually replaced by synthetic eriochalcite (CuCl 2·2H 2O).
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