Correlation of the surface and volume component contents in lumps with different mineralization

Preliminary ore dressing is an actively developing direction in the minerals processing. The application of information (sensor-based) sorting methods involves the use of both volume and surface signs of separation. When using surface signs of separation, it is important how the component surface content estimated by them is interconnected with the volume content and, ultimately, with the mass content. In the work, on the example of artificial models with different mineralization of the component, the correlation between the surface and volume contents of the component was studied. The surface content was estimated using the X-ray fluorescence method by the magnitude of the spectral ratio. Six types of models are considered, of which two were covered with a layer of homogeneous material representing a gangue or mineral phase, and four others represented various types of mineralization with different values of the component surface content. Formulas were derived to estimate the surface and volume content and mass content for the studied models. Graphical dependences of the surface content and the average value of the spectral ratio on the volume content and mass content were obtained, which showed the presence of an edge effect for models with different mineralization. The edge effect can have a negative effect when using a surface separation feature when using X-ray fluorescence separation as a pre-concentration method, since there is a possibility of incorrect identification of a piece depending on its position relative to the measuring system.

Ovchinnikova T. Yu., Tsypin E. F., Efremova T. A., Arinov K .N. Correlation of the surface and volume component contents in lumps with different mineralization. MIAB. Mining Inf. Anal. Bull. 2022;(11-1):140—154. [In Russ]. DOI: 10.25018/0236_1493_2022_111_0_140.

Ovchinnikova T. Yu., Cand. Sci. (Eng.), Associate Professor of the Mineral Dressing Department, ORCID iD 0000-0001-7000-9295, Federal State Budgetary Educational Institution of Higher Education “Ural State Mining University”, 30 Kuibyshev str., Yekaterinburg, Russia, 620144, tatyana.ovchinnikova@m.ursmu.ru;
Tsypin E. F., Dr. Sci. (Eng.), Professor, Professor of the Mineral Dressing Department, ORCID iD 0000-0003-3921-2695, Federal State Budgetary Educational Institution of Higher Education “Ural State Mining University”, 30 Kuibyshev str., Yekaterinburg, Russia, 620144, tsipin.e@mail.ru;
Efremova T. A., Researcher of the Laboratory of Mineral Dressing of Non-ferrous Metal Ores and Technogenic Raw Materials, Mineral Dressing Department of JSC “Uralmekhanobr”, 87 Khokhryakova str., Yekaterinburg, Russia, 620144, efremova_ta@umbr.ru;
Arinov K. N., Graduate Student, Federal State Budgetary Educational Institution of Higher Education “Ural State Mining University”, 30 Kuibyshev str., Yekaterinburg, Russia, 620144.

Ovchinnikova T. Yu., e-mail: tatyana.ovchinnikova@m.ursmu.ru.

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