DOI: 10.5593/sgem2017/11/S04.139


A. Opalev, V. Biryukov, M. Khokhulya, A. Shcherbakov
Tuesday 12 September 2017 by Libadmin2017

References: 17th International Multidisciplinary Scientific GeoConference SGEM 2017, www.sgem.org, SGEM2017 Conference Proceedings, ISBN 978-619-7105-98-8 / ISSN 1314-2704, 29 June - 5 July, 2017, Vol. 17, Issue 11, 1089-1096 pp, DOI: 10.5593/sgem2017/11/S04.139


The article considers mineralogical and technological features of ferruginous quartzites in the Zaimandrovsky region’s deposits and tailings from the rough magnetic separation. A technology has been developed for the stadial separation of magnetite concentrate from the initial ore, including the ore preparation, magnetic separation, and also the joint use of fine screening and magnetic gravity separation. The increase in the efficiency of the gravitational cycle for the hematite concentrate production was achieved by introducing two stages of the screw separation and the concentration on the table for separating the tails of the rough magnetic separation. The combined technology provides the bulk magnetite-hematite concentrate containing about 66% of the mass fraction of iron during through-extraction of 87.1% of Fe. A promising direction of the intensification of the processing process is the stadial separation of the finished concentrate as the ore minerals are liberated, which predetermines the need to change the ore preparation processes for the rational use of grinding equipment. It is shown that the use of fine screening operations allows saving the energy and resources up to 40% due to the reduction of the circulating load in the “grinding-classification” cycle.

Keywords: ferruginous quartzites, stored waste, magnetic-gravity separation, gravity concentration, intergrowths, magnetite, hematite, quartz, concentrate, tails.

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