NUST MISIS, Moscow, Russia:

N. V. Osipova, Associate Professor, Candidate of Engineering Sciences, nvo86@mail.ru

The article focuses on finding solution to a topical scientific–technical problem—automation of wet magnetic separation control in iron ore processing. The automatic control allows stabilization of iron content of concentrate at a preset level at the minimum loss in tailings. The author reviews briefly the publications devoted to this topic, marks advantages and disadvantages of the earlier developed methods and offers a new approach based on using two subsystems ensuring stabilization of magnetic iron content of concentrate and iron loss in tailings. The input parameters of these subsystems are the separator drum rotation speed and the water flow rate in separating bath. Based on the time charts obtained in modeling the automatic control of magnetic separation of iron ore, some conclusions can be drawn. The application of the proportionally integral law of control makes it possible to stabilize useful component content at a preset level in concentrate at override not more than 0. 55 % under trouble of equipment operation due to unstable properties of pulp slurry. The positioning controller of iron content of tailings ensures stabilization of this parameter at a level not higher than permissible value at override not more than 0.2 %. The research of the developed model efficiency allows recommending it for the commercial introduction at processing plants of operating mining and processing works.

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