Ural State Mining University (USMU), Ekaterinburg, Russia:

A. E. Pelevin, Dr. Eng., Professor of the Dept. of Mineral Processing, e-mail: a-pelevin@yandex.ru

Application of the technology with the use of drum separators with increased magnetic field induction (0.3 T) in the initial operations of beneficiation schemes for magnetite and titanomagnetite ores is considered. The technology makes it possible to reduce losses of iron from beneficiation tailings and the iron content in them during dry and wet magnetic separation (DMS, WMS-1) and for the scheme as a whole. When beneficiating titanomagnetite ore, the concentrate yield increases (by 0.22–0.53%) and the extraction of iron into concentrate (by 0.77–1.68%). When beneficiating ferrous quartzites, the concentrate yield increases (by 0.91%) and the extraction of iron into concentrate (by 1.07%). Concentrate production operating costs are unchanged. The disadvantage of this technology is a slight decrease in the iron content in the concentrate, associated with an increase in the load on the mills of the first and second stages of grinding. Therefore, the technology with the use of separators with increased magnetic field induction in DMS and WMS-1 operations can be considered for concentration plants that have the ability to increase the productivity of mills to ensure a given content of the class – 0.071 mm in concentrate. Drum (pulley) separators with the top feeding of material and Nd-Fe-B permanent magnet systems, can be used in beneficiating schemes for weakly magnetic minerals, for example, ilmenite and some manganese-containing minerals. With dry magnetic beneficiation of ilmenite middlings with a content of 20.7% TiO₂, a concentrate with a content of 48.28% TiO2 was obtained. Dry concentration of lowquality gravity manganese concentrate with 33.19% Mn resulted in a concentrate with 38.40% Mn.

1. Liamas-Bueno M., Lopez-Valdivieso A., Corona-Arroyo M. A. On the mechanisms of silica (SiO₂) recovery in magnetite ore low-magnetic-drum concentration. Mining, Metallurgy & Exploration. 2019. Vol. 36. pp. 131–138.
2. Osipova N. V. Automatic control system for wet magnetic separation of iron ore. Gornyi Zhurnal. 2019. No. 1. pp. 62–65.
3. Osipova N. V. The use of Kalman filter for automatic control of indicators of magnetic concentration of iron ores. Izvestiya vysshikh uchebnykh zavedeniy. Chernaya metallurgiya. 2018. Vol. 61. No. 5. pp. 372–377.
4. Vaisberg L. А., Dmitriev S. V., Mezenin A. О. Controllable magnetic anomalies in mineral processing technologies. Gornyi Zhurnal. 2017. No. 10. pp. 26–32.
5. Parian M., Lamberg P., Rosenkranz J. Developing a particle-based process model for unit operations of mineral processing – WLIMS. International Journal of Mineral Processing. 2016. Vol. 154. pp. 53–65.
6. Khokhulya М. S., Opalev А. S., Rukhlenko Е. D., Fomin А. V. Obtainment of magnetite-hematite concentrate from ferruginous quartzites and stockpiled waste of their concentration on the basis of mineralogical and technological research. Gornyi informatsionno-analiticheskiy byulleten. 2017. No. 4. pp. 259–271.
7. Karmazin V. V., Sinelnikova N. G., Loginova L. А., Eputaev G. А., Danilova М. G. Study of the staged separation process in separators with a magnetic system with magnets of different heights. Gornyi informatsionno-analiticheskiy byulleten. 2007. No. 9. pp. 310–315.
8. Opalev А. S., Biryukov V. V., Shcherbakov А. V. Staged separation of magnetite concentrate in the development of energy-saving technology for the beneficiation of ferruginous quartzites at OJSC “Olkon”. Gornyi informatsionno-analiticheskiy byulleten. 2015. No. 11. pp. 60–62.
9. Pelevin А. Е., Sytykh N. А. Fine hydraulic screening for staged separation of titanium-magnetite concentrate. Obogashchenie Rud. 2021. No. 1. pp. 8–14.
10. Pelevin А. Е. Effect of magnetic flocculation on the results of concentration of iron-bearing ore concentration. Obogashchenie Rud. 2021. No. 4. pp. 15–20.
11. Palaniandy S., Halomoan R., Ishikawa H. TowerMill circuit performance in the magnetite grinding circuit – The multi-component approach. Minerals Engineering. 2019. Vol. 133. pp. 10–18.
12. Markauskas D., Kruggel-Emden H. Coupled DEM-SPH simulations of wet continuous screening. Advanced Powder Technology. 2019. Vol. 30. Iss. 12. pp. 2997–3009.
13. Vaisberg L. А., Korovnikov А. N. Fine screening as an alternative to hydraulic sizing. Obogashchenie Rud. 2004. No. 3. pp. 23–34.
14. Vaisberg L. А., Korovnikov А. N., Trofimov V.A. Innovative re-equipment of screening circuits (to commemorate the 100th anniversary of the Mekhanobr Institute). Gornyi Zhurnal. 2017. No. 1. pp. 11–17.
15. Pelevin А. Е., Sytykh N. А. Increased magnetic field induction separators in titanium magnetite ore processing. Obogashchenie Rud. 2020. No. 2. pp. 15–20.
16. Yakubaylik E. К., Ganzhenko I. М., Butov P. Yu., Kilin V. I. Reduction of iron losses during wet separation in high fields. Zhurnal Sibirskogo federalnogo universiteta. Seriya: Tekhnika i tekhnologii. 2016. Vol. 9. No. 8. pp. 1302–1310.
17. Kuskov V. B., Lvov V. V., Yushina T. I. Increasing the recovery ratio of iron ores in the course of preparation and processing. CIS Iron and Steel Review. 2021. Vol. 21. pp. 4–8.
18. Tripathy S. K., Singh V., Murthy Y. R., Banerjeea P. K., Suresh N. Influence of process parameters of dry high intensity magnetic separators on separation of hematite. International Journal of Mineral Processing. 2017. Vol. 160. pp. 16–31.
19. Pelevin А. Е., Tsypin Е. F., Koltunov А. V., Komlev S. G. High intensity magnetic separators with permanent magnets. Izvestiya vysshikh uchebnykh zavedeniy. Gornyi zhurnal. 2001. No. 4–5. pp. 133–136.
20. Shen Sh., Yuan Zh., Liu J., Meng Q., Hao H. Preconcentration of ultrafine ilmenite ore using a superconducting magnetic separator. Powder Technology. 2020. Vol. 360. pp. 1–9.