Biological Leaching of Waste of Sulphidic Copper-Zinc Ores Flotation in Percolators

Автор: D.V. Cherkasova, M.D. Bakaeva, S.P. Chetverikov, and О.N. Loginov

Страница: 61-69

Biological Leaching of Waste of Sulphidic Copper-Zinc Ores Flotation in Percolators

Biotekhnologiya, 2012, N 6, P. 61-69

UDC 504.062.2

Section:  “Ecology”

D.V. Cherkasova ^*,  M.D. Bakaeva ^*,  S.P. Chetverikov,  and  О.N. Loginov

The Institute of biology, Ufa Research Center, Russ. Acad. Sci.,  450054, Ufa Russia

e-mail:  biolab316@yandex.ru

A process of biological leaching of waste of ores flotation from the Uchalinskii Mining Plant in laboratory percolators has been investigated in comparison with a process performed under stationary conditions. The modeling of the bioleaching process was carried out using a strain of Acidithiobacillus ferrooxidans IB 2 that demonstrated a significant oxidizing activity towards the flotation waste and was capable of growing in the occurrence of 16 g/l copper and 65 g/l zinc. A suggested technology including a preliminary treatment by 1 % sulfuric acid provides the stability of the leaching solution рН, favors the sulfide-oxidizing bacteria reproduction, and therefore accelerates the leaching process and enhances the degree of the metal extraction. As a result of the modified bioleaching technology application, it was possible to achieve the rate of zinc and copper extraction by 66,2% and 40,3 % of their starting content in the waste, respectively. The obtained data were comparable with those obtained using the “tank” (stationary) technology, whereas the suggested technique retained all the advantages of a continuous process.

Key words:  copper,  ore bioleaching,  waste recycling,  zinc.

The full English version of the article was published in “Biotechnology in Russia”, 2012, Issue 6, pp. 61-69 as D.V. Cherkasova, M.D. Bakaeva, S.P. Chetverikov, О.N. Loginov “Biological Leaching of Waste of Sulphidic Copper-Zinc Ores Flotation in Percolators”.

It is contained at the Russian Scientific Electron Library website:  http://elibrary.ru/item.asp?id=22959638

30.04.2015, 1547 просмотров.