Pande, A M and Gupta, K N and Altekar, V A (1982) Single cell extraction of zinc and manganese dioxide from zinc sulphide concentrate and manganese ores. Hydrometallurgy, 9 (1). pp. 57-68.
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The hydrometallurgical processing of zinc sulphide concentrates with sulphuric acid in the presence of manganese dioxide (manganese ore has been employed) and subsequent electrolytic co-deposition of cathodic zinc metal and anodic manganese dioxide is described. The influence of various parameters on the reaction ZnS + MnO2 + 2H2SO4 = ZnSO4 + MnSO4 + S0 + 2H2O has been studied. Optimum conditions for rapid and efficient reaction have been determined. The simultaneous electrowinning of zinc at the cathode and γ-MnO2 at the anode from the leach liquor was studied. The effects of variation of current density, temperature, electrolyte composition etc. have been described in detail. During leaching 99% extraction of zinc, 98% of manganese, and 96% liberation of elemental sulphur was achieved. 80–90% anodic and cathodic current efficiencies can be obtained under optimum conditions with impurity levels of only a trace of manganese in the zinc deposit and vice-versa. The anodically deposited manganese dioxide was the γ-battery active variety and was found to be satisfactory. The results indicate the potential for the development of a technique for zinc and manganese dioxide production in a single cell.
|Uncontrolled Keywords:||Zinc sulphide; Zanganese ores|
|Divisions:||Material Science and Technology|
|Deposited By:||Sahu A K|
|Deposited On:||09 Jun 2010 13:46|
|Last Modified:||09 Nov 2011 10:55|
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