Spirit Science and Production, Irkutsk, Russia¹ ; Institute of the Earth’s Crust, Siberian Branch, Russian Academy of Sciences, Irkutsk, Russia²:

S. A. Prokopiev^1,2, Head of Integrated Mineral Resources Utilization Department, Chairman of Board of Directors, Candidate of Engineering Sciences
E. S. Prokopiev^1,2, Director of Technology and Innovation, Engineer at Integrated Mineral Resources Utilization Department

Spirit Science and Production, Irkutsk, Russia:
K. K. Emelyanova, Preparator, ekk@spirit-irk.ry

Stoilensky GOK, Stary Oskol, Russia:
S. A. Napolskikh, CEO, Head of Ore Division

The longstanding and fruitful activities of Stoilensky GOK build upon persistent improvement and advance of production. An emphasis is laid on enhanced operating efficiency at minimized environmental impact. Production of high-quality magnetite–hematite concentrate by spiral separation at primary stages of processing can enable generally higher quality of the finished concentrate. For another thing, removal of dissociated magnetite and hematite from primary middlings eliminates over-sludging of the minerals and, accordingly, reduces iron loss with slime. The research and field trials provided assessment of feasibility of high-quality magnetite–hematite concentrate production by spiral separation at the primary stages of processing in the conditions of concentrating plant at Stoilensky GOK.
The authors appreciate participation of S. A. Napolskikh, CEO and Head of Ore Division at Stoilensky GOK, in these studies.

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