Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia

I. A. Grishin, Cand. Eng., Associate Prof., Head of the Dept. of Geology, Mine Surveying and Mineral Processing, e-mail: igorgri@mail.ru

E. Yu. Degodya, Cand. Eng., Associate Prof., Dept. of Geology, Mine Surveying and Mineral Processing, e-mail: magur@mail.ru

I. A. Pytalev, Dr. Eng., Prof., Director of the Institute of Mining and Transport, e-mail: vehicle@list.ru

The Institute of Mining, Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia

O. V. Zoteev, Dr. Eng., Prof., Head of the Laboratory of Geodynamics and Rock Pressure

Research Institute of Comprehensive Exploitation of Mineral Resources, Russian Academy of Sciences, Moscow, Russia
I. V. Shadrunova, Dr. Eng., Prof., Head of the Mining Ecology Dept., e-mail: shadrunova_@mail.ru

The possibility of processing poor iron-containing raw materials with a high proportion of finely dispersed fraction is shown using the example of material from nickel ore mining dumps. The main challenge in beneficiating raw materials with a finely dispersed fraction in aqueous, and especially air, environments arises from the difficulty of separating particles smaller than 10 μm. These particles are predominantly aluminosilicate minerals, allowing us to consider the nature of their intermolecular interactions in terms of clays and clayey soils. A classification of mineral raw materials by clay content groups is proposed, which determines the development of basic processing schemes. Ores are assigned to groups based on the determination of the plasticity index of the material. The adequacy of the proposed classification was verified experimentally using magnetic separation of the material. A raw material sample with a plasticity index of 15.4 was sent for wet magnetic separation in a weak field with and without preliminary ultrasonic treatment. The experimental results show higher values for the treated pulp, which indicates the correctness of the proposed hypothesis.
The work was carried out with the financial support of the Ministry of Science and Higher Education of the Russian Federation (project No. FRZU-2023–0008).

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