National Mineral Resources University (University of Mines) (Russia):

Daryin A. A., Ph. D. in Engineering Sciences, assistant, darinbox@mail.ru

Maksimova A. V., Рostgraduate, maksimova_nastya@list.ru

Telyakov A. N., Ph. D. in Engineering Sciences, Associate Professor, 9418960@mail.ru

Scientific Research Institute — Federal Research Centre for Projects Evaluation and Consulting Services (Russia):

Fuks A. M., Ph. D. in Engineering Sciences, Senior Researcher, alex_mark@list.ru

A theory of silicate microorganisms application in low-grade ores treatment is described. The existing theories of this type of microorganisms activity and recultivation, as well as possible effects on quartziferous ores are presented. Factors, affecting biodestructive rate and kinetics, as well as biodestructive process control and optimization are considered. The data obtained in the studies of bioculture optimal living conditions and recultivation, nutritive medium preparation, influence of different elements, contained in nutritive medium, upon bacterial living processes, are presented. The results, obtained by the authors in quartziferous ores silicate bacterial treatment studies, are analyzed. Ore composition, nutritive medium preparation methods, as well as samples analysis, are described. Bacterial isolation was performed in accordance with the standard microbiological method, using soil isolation with nutritive medium А-27. Samples hardness properties were tested by means of instrumented indentation (nanoindentation), employing the Vickers hardness test standard method (HV). The elastoplastic properties and microindentation hardness were estimated with the help of dynamic ultra-hardness (nanoindentation) tester Shimadzu DUH-211. On the basis of the conducted studies results, the conclusions are drawn with respect to ore biodestructive dynamics and possible mechanism of quartz inclusions disintegration.

1. Brierley C. L. How will biomining be applied in future? Trans. Nonferrous Met. Soc. China, 2008, No. 18, pp. 1302–1310.
2. Shoufa Zhan, Juanjuan Liu, Ye Chen, Desi Sun. Single and coorperative bauxite bioleaching by silicate. IERI Procedia, 2013, Vol. 5, pp. 172–177.
3. Purevdash M., Saltykova S. N., Afanashchenko Ye. S., Telyakov N. M. Effect of silicate bacteria on mineral constituents of commercial ores. Obogashchenie Rud, 2011, No. 1, pp. 15–18.
4. Telyakov N. M., Saltykova S. N., Georgiyeva E. Yu. Increasing of refractory ores treatability. Vestnik ZabGU = Transbaikal State University Journal, 2013, No. 6, pp. 91–94.
5. Polkin S. I., Adamov E. V., Panin V. V. Tekhnologiya bakterialnogo vyshchelachivaniya tsvetnykh i redkikh metallov (Technology of nonferrous and rare metals bacterial leaching). Moscow, Nedra, 1982, pp. 21–60.
6. Arkadyeva Z. A., Bezborodov A. M., Blokhin I. N., et al. Promyshlennaya mikrobiologiya. Uchebnoye posobiye (Industrial microbiology. Textbook). Moscow, Vysshaya shkola, 1989.
7. Aristovskaya T. V. Mikrobiologiya protsessov pochvoobrazovaniya (Microbiology of soil formation processes). Leningrad, Nauka, 1980, 186 p.
8. Lian B. Study on silicate bacteria GY92 dissolving potassium from illite. Acta Mineral. Sinica, 2008, No. 18, pp. 234–238.
9. Yakhontova L. K., Zvereva V. P. Osnovy mineralogii gipergeneza (Fundamentals of supergene mineralogy). Vladivostok, Dalnauka, 2000, 331 p.
10. Glazer A. N., Nikaido H. Microbial Biotechnology. Fundamentals of Applied Microbiology. 2nd ed. Cambridge University Press, 2007, 576 p.
11. Adamov E. V., Krylova L. M., Kim E. A., Gusakov M. S. Processing of nickel-containing ores and concentrates with the use of bacterial-chemical oxidation. Gornyy Informatsionno-Analiticheskiy Byulleten = Mining Informational and Analytical Bulletin, 2012, No. 11, pp. 69–73.
12. Khasanov O. L., Struts V. K., Sokolov V. M., Polisadova V. V. et al. Metody izmereniya mikrotverdosti i treshchinostoykosti nanostrukturnykh keramik. Uchebnoye posobiye (Methods for measuring the microhardness and fracture toughness of nanostructured ceramics. Textbook). Tomsk, TPU (Tomsk Politechnic University), 2011, pp. 53–58.