MMC Norilsk Nickel’s Polar Division, Norilsk, Russia:

L. S. Lesnikova, Chief Engineer at the Engineering Support Centre, Candidate of Technical Sciences, e-mail: LesnikovaLS@nornik.ru
D. O. Midyukov, Chief Specialist, Scientific and Technical Department, e-mail: MidyukovDO@nornik.ru
D. E. Chikildin, Deputy Chief Engineer, Head of the Technical Department of Talnakh Concentrator, e-mail: CikildinDE@nornik.ru
V. N. Geyl, Deputy Head of the Technical Department of Talnakh Concentrator, e-mail: GeylVN@nornik.ru

Talnakh Concentrator processes the mixture of high-grade and cupriferous ores to produce copper and nickel-pyrrhotite concentrates via the process implemented in 2016. Since 2018, pursuing a comprehensive use of raw materials, Talnakh Concentrator proceeded with reconcentration of low-nickel pyrrhotite product to produce low-grade reflotation concentrate (0.8–1.2% of nickel) sent to Nadezhda Metallurgical Plant named after B.I. Kolesnikov (hereinafter, NMP) for hydrometallurgical processing. Testing of Copper Plant’s byproducts application was aimed at increasing nickel recovery as a result of the nickeliferous pyrrhotite surface activation by copper ions. It is impractical to apply blue vitriol, traditionally used for this purpose, as it leads to a significant decrease in technical and economic performance due to an increase in operating costs for reconcentration. The Copper Plant products, such as decopperized electrolyte and a coppernickel solution from PGM Concentrator were tested as activators. These products contain not only residual amount of copper ions, but also a substantial quantity of sulphuric acid. The study showed that Copper Plant’s solution application increased the amount of nickel recovered to the product of reconcentration and improved the product pyrrhotite content that favorably effected its subsequent pressure oxidation leaching. Application of the copper-nickel solution from PGM Concentrator is considered to be the best option due to a higher ratio of copper ions to sulphuric acid. Solutions applied during nickel-pyrrhotite flotation at Talnakh Concentrator were also studied. The authors simulated the initial composition alteration of Talnakh Concentrator’s feed with an increase in a share of cupriferous ore, containing much less pyrrhotite than high-grade ore. It was found out that if the feed contained critical amount of cupriferous ore, application of Copper Plant’s solutions contributed to maintenance of sulphur content in the nickel-pyrrhotite concentrate of Talnakh Concentrator that provided energy potential required for the appropriate thermal conditions of NMP’s smelting vessels.

1. Lesnikova L. S., Volyanskiy I. V., Datsiev M. S., Arabadzhi Ya. N. Implementation of the enrichment technology of the charge of rich and cuprous ores at Talnakh Concentrator. Tsvetnye Metally. 2018. No. 6. pp. 32–37. DOI: 10.17580/tsm.2018.06.04.
2. Tsymbal A. S., Lesnikova L. S., Volyanskiy I. V., Arabadzhi Ya. N. Phases of Talnakh concentrator development and expansion for mineral raw material processing. Tsvetnye Metally. 2015. No. 6. pp. 17–19. DOI: 10.17580/tsm.2015.06.03.
3. Volyanskiy I. V., Likhacheva T. A., Kurchukov A. M., Miller A. A. Basic aspects of Talnakh concentrator reconstruction and modernization. Tsvetnye Metally. 2020. No. 6. pp. 6–10. DOI: 10.17580/tsm.2020.06.01.
4. Ryabushkin M. I., Petrov A. F., Lyubeznykh V. A., Brusnichkina-Kirillova L. Yu. Processing of technogenic materials from Talnakh Concentrator at hydrometallurgical production facility of Nadezhda Metallurgical Plant of PJSC MMC Norilsk Nickel. Tsvetnye Metally. 2018. No. 6. pp. 65–71. DOI: 10.17580/tsm.2018.06.09.
5. Avdokhin V. M. Fundamentals of minerals processing. In 2 volumes. Vol. 1. Concentrating processes. 4^th ed. Moscow : Moskovskiy gosudarstvennyi gornyi universitet, 2018. 420 p.
6. Abramov A. A. Collected edition. Vol. 8. Floatation. Sulphide minerals. Moscow : Gornaya kniga, 2013. 704 p.
7. Finkelstein N. P. The activation of sulphide minerals for flotation: a review. International Journal of Mineral Processing. 1997. Vol. 52. pp. 81–120.
8. Peng Y. J., Seaman D. Effect of feed preparation on copper activation in flotation of Mt Keith pentlandite. Mineral Processing and Extractive Metallurgy. 2012. Vol. 121. pp. 131–139.
9. Otunniyi I. O., Oabile M., Adeleke A. A., Mendonidis P. Copper activation option for a pentlandite–pyrrhotite–chalcopyrite ore flotation with nickel interest. International Journal of Industrial Chemistry. 2016. Vol. 7. pp. 241–248.
10. Ekmekçi Z., Becker M., BagciTekes E., Bradshaw E. An impedance study of the adsorption of CuSO4 and SIBX on pyrrhotite samples of different provenances. Minerals Engineering. 2010. Vol. 23. pp. 903–907.
11. Petrukhin V. A., Lesnikova L. S., Demidenko I. S., Kozhanova M. V., Datsiev M. S. Improvement of technology of concentration of ingrained and cuprous ores. Tsvetnye Metally. 2013. No. 6. pp. 16–22.
12. Lesnikova L. S., Dzansolov I. V., Paramonov G. G., Berdyshev S. A. Prospects of processing ingrained and cuprous ores of the Talnakh ore cluster. Tsvetnye Metally. 2020. No. 6. pp. 23–27.