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Copper Extraction from Complex Waste Dumps by Biochemical Leaching Method
 
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Institute of Metallurgy and Ore Beneficiation, JSC, Satbyaev University, 29/133, Shevchenko str., Almaty, Kazakhstan, 050010
CORRESPONDING AUTHOR
David Magomedov   

Institute of Metallurgy and Ore Beneficiation, JSC, Satbyaev University, 29/133, Shevchenko str., Almaty, Kazakhstan, 050010
 
 
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ABSTRACT
The article presents the research results for the effectiveness of copper extraction from ores of the Satpayev deposit with complex, mixed composition bacterial leaching. Experiments with pre-acidification of copper samples, were performed using biological oxidation by A.Ferrooxidans bacterial culture, adapted strain. Biochemical opening moes of mineral raw materials using A. Ferrooxidans bacteria of a particular strain adapted to the copper waste composition and capable to oxidize sulfide and iron-bearing minerals were worked out. Optimal growth conditions for microorganisms in copper mineral pulp medium were established (temperature, pH, S: L.) The highest leaching efficiency, up to 88.65 %, was observed in experiments with preliminary bio-oxidation of samples by A.Ferrooxidans bacterial culture.