Comparative Study of Metals Recovery Process from Effluent Water of a Metallurgical Refining Process

概要

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Effluent waters from metallurgical refining process are usually treated by hydrometallurgical processes incorporating leaching, cementation, electrowinning, precipitation to extract and recover precious and base metals from municipal solid wastes. In the current study, we focused on the possibility of recovering previous metals namely; (Cu, Au, In, Pd, Pt) from the effluent water by cementation and solvent extraction steps. Fe, Al, and Zn powders were used for precious metal cementation, and LIX-84I, D2EHPA, and TBP as organic extractants with kerosene were used in solvent extraction. 99% of Cu, 96% of Pd, 85% of Au were recovered by Fe powder at (Fe/Cu)mole ratio of 2, and 99.6% of Cu, 99.5% of Pd were recovered by Al powder at (Al/Cu)mole ratio of 2. Also 85% of In and 90% of Au were recovered by solvent extraction using D2EHPA and TBP, respectively.