Institute Gipronickel, Saint Petersburg, Russia

I. V. Klimenko, Senior Researcher in the Nickel Refining Technology Sector of the Laboratory of Hydrometallurgy, e-mail: KlimenkoIV@nornik.ru
А. V. Sundurov, Senior Researcher in the Nickel Refining Technology Sector of the Laboratory of Hydrometallurgy, Candidate of Technical Sciences, e-mail: SundurovAV@nornik.ru
А. Yu. Pavlov, I Grade Engineer of the Laboratory of Hydrometallurgy, e-mail: PavlovAYu@nornik.ru

Kola Mining and Metallurgical Company JSC, Monchegorsk, Russia
N. М. Tarasenko, Chief Technologist of the Nickel Electrolysis Shop, e-mail: tarasenkoNM@kolagmk.ru

Nowadays, the strategy for the development of nickel refining capacities of PJSC MMC Norilsk Nickel, represented in Russia by the nickel electrolysis workshop of JSC Kola MMC, is to diversify the line of promising commercial products and reduce the costs of existing nickel production. The directions involve both technological calculations and an economic assessment of various options for organizing production in general and upgrading individual processing units in particular, as well as conducting a large number of scientific studies related to nickel production and deep purification of nickel solutions from a number of impurities. These goals are often interconnected, and the results of scientific support of existing production also become the basis for promising schemes for obtaining highpurity premium nickel products. The studies are carried out by both JSC Kola MMC and LLC Institute Gipronickel, and tests on a pilot scale are carried out by specialists from both organizations jointly on the basis of the nickel electrolysis workshop of JSC Kola MMC. The studies cover a wide range of processes and methods of purification from impurities, particularly, cementation, sorption, extraction methods, hydrolytic deposition. The main impurities targeted for the studied processes are copper, iron, zinc, cobalt, lead and manganese. The article presents a brief overview of the results obtained during the studies. Since chloride technologies theoretically allow electrolysis from concentrated nickel solutions, this makes it possible to effectively organize the process of electrolytic nickel buildup. The information provided in this article is of great practical importance for specialists all over the world.
Studies listed in this article also were carried out by the employees of LLC Institute Gipronickel (M. B. Greyver, M. A. Pleshkov, A. Yu. Chetverkin, T. V. Vergizova, P. M. Saltykov, M. I. Kalashnikova, V. E. Polesskaya, P. L. Petrova, V. M. Shpaer, A. A. Vasileva, S. L. Tsapakh) and JSC Kola GMK (K. V. Smirnov, A. A. Elesichev, I. S. Platonov, A. N. Sheloputov, V. P. Malyuhin, A. V. Shevcov, P. V. Smirnov, A. V. Belov).

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