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| LEACHING KINETICS OF Au-BEARING SULPHIDE CONCENTRATE BY FeCl_3 SOLUTION |
| FANG Zhaoheng;MUHEMMED M Institute of Chemical Metallurgy; Academia Sinica;Beijing Royal Institute of Technology; Sweden |
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Cite this article:
FANG Zhaoheng;MUHEMMED M Institute of Chemical Metallurgy; Academia Sinica;Beijing Royal Institute of Technology; Sweden. LEACHING KINETICS OF Au-BEARING SULPHIDE CONCENTRATE BY FeCl_3 SOLUTION. Acta Metall Sin, 1993, 29(9): 47-52.
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Abstract A process extracting Cu, Ag, Pb and Zn from a bulk sulphide concentrate withFeCl_3 solutions was investigated. The kinetics of the process and effective parameters wereexamined based on a model of non-reaction shrinking core and an approach of non-linearregression. It was found that the rate of Cu dissolution in the process was controlled by a sur-face reaction which was a half order with respect to Fe~(3+) ions and zero order with respect toCl_-ions. More than 96% Cu, 95% Ag, 90% Pb and 9l% Zn were extracted while over70% sulphide were converted to elemental S and more than 97% of Au were left in theleached residue under the conditions studied. Thus, the leaching process by FeCl_3 and NaClsolution was a more potential technology for pre-treating of Au-bearing sulphide concen-trate and recovery of valuable metals.
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Received: 18 September 1993
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1 Sohn H Y, Wadsworth M E. Rate Processes of Extractive Metallurgy. New York: Pelenum, 1979: 8
2 Palmer B R, Nebe C O, Rau M F, Fuerstenau M C. Metall Trans, 1981; 12B: 595
3 Hirato T, Kinoshita M, Awakura Y, Majima H. Metall Trans, 1986; 17B: 19
4 O'Malley M L, Liddell K C. Metall Trans, 1987; 18B: 50 |
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