Tekhnical University of UGMK (Ekaterinburg, Russia):

Mamonov S. V., Head of Chair, Candidate of Engineering Sciences, Mamonov_SV@umbr.ru

UGMK — Ural Mining and Metallurgical Company (Verkhnyaya Pyshma, Sverdlovsk region, Russia):

Savin A. G., Deputy Director for Mining and Mineral Processing, info@ugmk.com

OJSC «Svyatogor» (Krasnouralsk, Sverdlovsk region, Russia):

Metelev A. A., Chief Engineer, Svyatogor@svg.ru

OJSC «Uralmekhanobr» (Ekaterinburg, Russia):

Gazaleeva G. I., Deputy General Director for Analytical Work, Doctor of Engineering Sciences, gazaleeva_gi@umbr.ru

The paper presents the results of the Peschanskoye deposit Southern body sulfide-magnetite ore material composition study. The analysis results show that the ore contains 0.59 % copper, with 66 % (rel.) of copper being associated with chalcopyrite; as well as 39.9 % iron, 81 % (rel.) of which is attributed to magnetite, and 3.87 % sulfur, 42 % (rel.) of which is associated with pyrrhotine, the latter by 65% being accounted for by a monoclinic modification. The main ironcontaining mineral in the ore is magnetite, its mass content being 45 %. In addition to magnetite, iron is also contained in carbonates, pyroxenes, amphiboles, chalcopyrite, pyrrhotine and pyrite. The main copper mineral in the sample is chalcopyrite, while covellite, chalcosine, bornite are of subordinate value. Cumulative mass content of copper minerals in the sample is about 1 %. According to the results of the laboratory technological studies, the following optimal parameters for ore beneficiation were determined: mass content of –71 μm size fraction in flotation feed is 65 %, pulp alkalinity — 250–280 g/m³ of free calcium oxide in pulp liquid phase, rougher copper flotation time — 20 min, butyl potassium xanthate consumption — 20 g/t, that of frother T-92 — 15 g/t, copper sulfate consumption in pyrrhotite activation — 300 g/t, magnetic field intensity — 119.4 kА/m. An integrated flotation-magnetic ore-processing technology was developed under laboratory conditions, permitting to produce copper concentrate containing 21.6 % copper, recovery being 91.7 %, as well as iron concentrate with mass fraction of iron being 66.5 % and that of sulfur — 1.2 %, iron recovery into concentrate being 87.9 %. The results of the pilot-scale testing of the technology in question at the «Svyatogor» Beneficiation Plant are presented, showing the possibility of obtaining copper concentrate with mass fraction of copper 19.1 %, recovery being 87.1 %, as well as iron concentrate with mass fraction of total iron 66.3 %, total iron recovery being 84.2 % and that of magnetite iron — 92.3 %. Sulfur mass fraction in iron concentrate was 1.6 %.

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