PJSC “Mikhailovsky GOK” (Zheleznogorsk, Russia):

Puzakov P. V., Director of Pelletizing Plant, postfax@mgok.ru
Kozub A. V., Cand. Eng., Chief Engineer

LLC “Metalloinvest” Managing Company (Moscow, Russia):
Ugarov A. A., First Deputy CEO — Production Director, a.ugarov@metalloinvest.com
Efendiev N. T., First Deputy CEO — Sales Director, n.efendiev@metalloinvest.com

RAN Institute of Comprehensive Exploitation of Mineral Resources named after Academician N. V. Melnikov — IPKON RAN (Moscow, Russia):
Lavrinenko A. A., Dr. Eng., Head of Laboratory of Comprehensive Processing of Unconventional Minerals, lavrin_a@mail.ru

PJSC «Uralmashzavod» (Ekaterinburg, Russia):
Kuznetsov A. L., General Director, mail@uralmash.ru

LLC «NPVP TOREX» (Ekaterinburg, Russia):
Solodukhin A. A., Cand. Eng., General Director, A.soloduhin@torex-npvp.ru
Poluyakhtov R. A., Team Manager, r.poluyahtov@torex-npvp.ru

Physical and chemical properties of green (fresh) pellets, as a measure of the pellet quality, is one of the key factors determining the technical and economic performance values of the state-of-art roasting machines. The experience of modernization projects at practically all pelletizing plants in Russia and other CIS countries, proves conclusively that the operational effect of modernization of thermal routes depends on the quality of green pellets. Moreover, the latter determines the service properties of the fired pellets to a great extent. Solving of the above-mentioned problems allows to improve substantially the technical and economic operating parameters of roasting machines, as well as the quality of the finished product. The latter is especially critical in the production of direct reduced (DR) pellets, since the requirements to fired pellets are generally more strict than that to those for blast furnace practice. To improve the technical and economic parameters of a pellet plants, one should identify the bottleneck areas/stages in the pellet production process and develop the technical solutions to improve the efficiency of the mentioned areas. One of such areas is a green pelletizing shop and its line for handling and feeding of green pellets to a roasting machine. This article describes the major innovative process solutions implemented at the roasting machine No 3 at PJSC “Mikhailovsky GOK” and its ancillary facilities, which enabled to maximize the quality of green and, respectively, commercial fired pellets. Technological parameters of the process influencing the physical and chemical properties of green iron ore pellets are presented. The achievements of the implemented technological scheme and the ACS system of the roasting machine allowed to meet the conditions required for the production of high-grade green pellets of consistent quality in order to achieve the efficient technical and economic performance parameters for a new-generation roasting machine.

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