Fundamental Study of Different Impurity Ions on Chalcopyrite Leaching Process

Abstract

Abstract: The effects of impurity ions on chalcopyrite leaching were investigated to investigated influence of impurity minerals on chalcopyrite leaching. The results showed that Al2（SO4）3 promoted Cu leaching， while Na2SO4， K2SO4， MgSO4 inhibited Cu leaching. Compared with [SO2-4]， the presence of Cl- in solution promoted the formation of a porous sulfur layer that accelerating the diffusion of leaching agent， thereby enhancing chalcopyrite leaching. The kinetic analysis indicated that chalcopyrite leaching with low concentrations of Na+， K+and Al3+ chalcopyrite leaching is controlled by surface chemical reaction while in the presence of MgSO4， it is controlled by diffusion. In addition， chalcopyrite leaching in the presence of Cl-was controlled by surface chemical reaction， chalcopyrite leaching in the presence of [SO2-4] was controlled by diffusion. The results can provide reference in increase copper leaching rate in chalcopyrite hydrometallurgy.

Key words: Impurity ions, Chalcopyrite, Leaching kinetics

WANG Hong-Duo, LI Yu-Biao, WANG Bing, WANG Xin-Yu. Fundamental Study of Different Impurity Ions on Chalcopyrite Leaching Process[J]. Metal Mine, 2018, 47(12): 99-103.

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Fundamental Study of Different Impurity Ions on Chalcopyrite Leaching Process

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