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Beneficiation
ArticleName Nickel leaching from pyrrhotine concentrates with iron, oxidized with immobilized biomass
ArticleAuthor Gusakov M. S., Krylova L. N., Adamov E. V.
ArticleAuthorData M. S. Gusakov, Candidate, e-mail: gusakov_m@mail.ru; L. N. Krylova, Senior Researcher; E. V. Adamov, Professor of Department of Enrichment of Non-ferrous, Rare and Precious Metals Ores, National University of Science and Technology “MISIS”. The work has been executed under scientific supervision of Master, National University of Science and Technology “MISIS” P. V. Roshchupko.
Abstract
The results of researching of immobilization of iron-oxidizing bacteria on neutral carriers and usage for regeneration of sulphide oxidizer during leaching of nickel-pyrrhotine concentrate have been presented. The materials, capable to adsorbe more microorganisms have been determined. Their concentration and speed of iron bio-oxidation has been raised. It has been experimentally shown that realization of chemical leaching of sulphide concentrates separated from oxidant regeneration with immobilize biomass allow to essentially reduce leaching duration and raise metal extraction.
keywords Iron-oxidizing bacteria, biomass, immobilization, cell adsorption, iron oxidizing, speed of bio-oxidation, oxidant regeneration, leaching, nickel-pyrrhotine concentrate, nickel, copper, extraction.
References

1. Adamov E. V., Panin V. V. Biotekhnologiya metallov : kurs lektsiy. — 2-e izd., ispr. i dop. (Biotechnology of metals: course of lectures. 2nd ed., revised edition) Moscow, 2008. 153 p.

2. Dew D. W. et al. The BIOX process for biooxidation of gold-bearing ores or concentrates. Biomining: Theory, Microbes and Industrial processes. 1991. Ch. 3. pp. 45–50.

3. Carranza F., Iglesias N., Mazuelos A. et al. Ferric leaching of copper slag flotation tailings. Minerals Engineering. 2009. No. 22. pp. 107–110.

4. Pert S. Dzh. Osnovy kultivirovaniya mikroorganizmov (Basis of microorganisms cultivation). Moscow, 1978. 331 p.

5. Sinitsyn A. P., Raynina E. I., Lozinskiy V. I., Spasov S. D. Immobilizovannye kletki mikroorganizmov (Immobilized cells of microorganisms). Moscow, 1994. 288 p.
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