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BENEFICIATION PROCESSES
ArticleName Effect of biotreatment upon physico-mechanical properties of copper-molybdenum sulfide ore
ArticleAuthor Purevdash M., Dolivo-Dobrovolskaya G. I., Saltykova S. N., Georgiyeva E. Yu.
ArticleAuthorData

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

Purevdash M., Researcher, Ph. D. in Engineering Sciences, moogi@mail.ru
Dolivo-Dobrovolskaya G. I., Professor, Doctor of Geology and Mineralogy, kafmetall@mail.ru
Saltykova S. N., Associate Professor, Ph. D. in Engineering Sciences, ssn_58@mail.ru
Georgiyeva E. Yu., Assistant, Ph. D. in Engineering Sciences, georgieva_eyu@mail.ru

Abstract

The article presents the results of studies performed on cut-off grade copper-molybdenum sulfide ore from the Erdenet Mining Complex with a view to investigate effect of bacterial liquor upon physical characteristics of the ore. The ore chemical and mineral compositions are described, the experimental data related to the ore grinding prior and after treatment with bacterial liquor are presented. The material grinding time was 5 and 10 minutes. Sieve analysis was performed, and reduction ratio and size modulus were determined. True density and total porosity of the samples were determined in the course of the investigations. Feed ore and treated ore magnetic fractions compositions were determined by means of spectroscan MAX-G. Effect of sulfuric acid solution upon magnetic fraction was studied. 9 % sulfuric acid solution was used as initial solution, liquid to solid ratio was 1 : 6, duration of acid effect was 15 days. pH medium and Fe2+, Fe3+ concentration in solution were under control in the course of the experiments. In order to study the effect of silicate bacteria upon copper-molybdenum sulfide ores in detail, microstructure analysis was performed by means of TESCAN scanning electron microscope. The experimental data permit to draw a conclusion, that under the effect of silicate bacteria, ore grains surface area is increased, thus improving liberation of copper-bearing minerals in subsequent ore processing and saving energy costs in ore disintegration.

keywords Copper-molybdenum ore, biotreatment, density, porosity, sieve analysis, reduction ratio, size modulus, magnetic fraction, recovery, microstructure analysis
References

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