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Gorniy vestnik Uzbekistana

Abstract

Over the 70 years of operation, Almalyk Mining and Metallurgical Combine (AGMK) has accumulated 155 million tons of waste ore and 1,350 million tons of flotation tailings of a copper-processing plant in the territory of the Almalyk region, which occupy huge areas and pose an environmental hazard. The objects of research at the Almalyk ore field were: A-4 blade (oxidized ore), A-7 (sulfide ore), 9a (oxidized ore), and open-pit ore of Kalmakyr deposit. The paper presents the microflora of all the studied dumps, from which the most active acidophilic associations of iron-sulfur-oxidizing bacteria were selected. Laboratory studies have been carried out on the heap bioleaching of dumped oxidized and sulphide ores, which showed that from oxidized ores of the A-4 heap, the through leaching of copper in 100 days reaches 84.1%, and from the A-7 heap of sulfide ores - 79.6%, which testifies to the suitability of biotechnology for the processing of dump ores AGMK

First Page

61

Last Page

67

References

1.Karavaiko G.I., Ross J. Agate A. Grudev S., Avakyan Z.A. Biogeotechnology of metals. Practical Guide: M .: Center for International Projects of the State Committee for Science and Technology. 1989. 375 p. 2. Rossi J. Underground and heap leaching. Leaching in waste dumps // Biogeotechnology of metals. Practical Guide / Ed. G.I. Karavaiko, J. Rossi, A. Agate, S. Grudev, Z.A. Avakian. M .: Center for International Projects of the State Committee for Science and Technology. 1989. рр. 228-326. 3.Ehrlich H.L. Past, present and future biohydrometallurgy // Inter. Biohydromet. Symposium “Biohydrometallurgy and environment for the 21st century”, 1999, рр. 3-12;

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