ISSN 1062-7391, Journal of Mining Science, 2017, Vol. 53, No. 5, pp. 925–937. © Pleiades Publishing, Ltd., 2017.
Original Russian Text © A.V. Varichev, A.A. Ugarov, N.T. Efendiev, S.I. Kretov, A.A. Lavrinenko, A.A. Solodukhin, P.V. Puzakov, 2017, published in Fiziko-
Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, 2017, No. 5, pp. 141–153.
__________________________________ MINERAL _________________________________
Innovative Solutions in Iron Ore Production at Mikhailovsky
Mining and Processing Plant
A. V. Varichev
*, A. A. Ugarov
, N. T. Efendiev
, S. I. Kretov
A. A. Lavrinenko
***, A. A. Solodukhin
****, and P. V. Puzakov
Metalloinvest Holding Company, Moscow, 121609 Russia
Mikhailovsky Mining and Processing Plant (MMPP), Zheleznogorsk, 307170 Russia
Academician Melnikov Institute of Intergated Mineral Resources Development–IPKON,
Russian Academy of Sciences, Moscow, 111020 Russia
NPVP TOREX, Ekaterinburg 620041, Russia
Received August 21, 2017
Abstract—The article describes features of ore reserves and development of processing technologies at
Mikhailovsky MPP. New approaches to disintegration of ore and to improvement of dry magnetic separation
of unoxidized ferruginous quartzite are evaluated. The scope of the discussion embraces the process of
finishing magnetite concentrate, extracted from unoxidized ferruginous quartzite by wet magnetic
separation, using the flotation flow chart in the closed and open circuits, as well as with the reverse cation
flotation of hematite concentrate from tailings of wet magnetic separation. The authors present engineering
solutions aimed at designing energy-efficient horizontal-grate calcinator MOK-1-592 and the technologies
to produce different-purpose iron ore pellets.
Keywords: Ferruginous quartzite, flotation, iron ore pellets, pelletizing factory, calcinator MOK-1-592.
The mineralogical and textural–structural properties of ores of Mikhailovsky deposit are classified
as the most rebellious and complex iron ores of three geological−commercial types: rich mine-and-
smelt ore, oxidized and unoxidized milling-grade quartzites.
The iron ore mined at Mikhailovsky mine and processing plant (MMPP) is unoxidized ferruginous
quartzites, distinguished for high strength, abrasive, and poor process properties unlike ferruginous
quartzites originated from Kursk magnetic anomaly (Stoilensk, Lebedinsk, Korobkovsk deposits) or
other Russian regions (Kostomukshsk, Olenegorsk and other deposits). They are specified with
negligible variations in total iron content, low amount of harmful components (few hundredth and
thousandth percent of sulfur and phosphorus) and high variability in mass content of iron magnetite
within 16−30%. The mineral composition of MMPP ore mixture containing unoxidized ferruginous
quartzites is specific, as strong magnetic minerals (magnetite) amount to only approximately half of
iron mass content.
The specific feature of magnetite concentrate produced by wet magnetic separation from
Mikhailovsky unoxidized quartzites is total low iron mass content and a variety of impurity elements.
Thereby, owning to the total iron and silicon dioxide content, a metallurgical grade of the magnetite
concentrate does not meet the requirements for mineral feed for production of high-grade pellets and a