Journals →  Tsvetnye Metally →  2012 →  #8 →  Back

ArticleName Autoclave leaching of the oxidised Buruktalsk nickel ores with usage of the elementary sulphur
ArticleAuthor Serova N. V., Lysykh M. P., Olyunina T. V., Kitay A. G., Dyachenko V. T.

A. A. Baikov Institute of Metallurgy and Materials Science of Russian Academy of Sciences, Moscow, Russia

N. V. Serova, Senior Researcher
M. P. Lysykh, Researcher
T. V. Olyunina, Deputy Senior Researcher, e-mail:
A. G. Kitay, Leading Researcher


“Norilsk Nickel” MMC, Norilsk, Russia

V. T. Dyachenko, Head of Administratiion of Idustrial and Engineering Development


This article gives the research results of autoclave leaching of the oxidized nickel ore of a Buruktalsky deposit. Researchings were held in the laboratory conditions with using an autoclave with 1 dm3 capacity. An elementary sulfur and oxygen were applied during the leaching instead of a sulfuric acid. In comparison with a sulphuric acid technology, the leaching parameters were reduced. At the temperature by 200–220 oС and general pressure nearby 0,8 MPа, the extraction of nickel in solution was 90–96.5%, and the extraction of cobalt was 96–98%. Thus, the concentration of a free sulfuric acid in a final solution was 90–140 g/dm3. Usage of this solution as recirculated in the process of atmospheric ore leaching at the temperature by 95–100 oС, allowed to reduce the concentration of a sulfuric acid to 19–22 g/dm3 and to raise the concentration of useful components in a solution. The phase concentrations of the oxidized nickel ore and leaching products were investigated by methods of X-ray analysis. The significant content of smectites is the peculiarity of this ore of mixed silicate and ferruginous type. It is probably due to some toughening of leaching conditions in comparison with a processing of other samples of blended type ores. A quartz and various basic sulphates (generally — jarosite and sodium rock alum), were discovered as the basic phases in solid residues from leaching. The residues of initial ore phases were present in the cakes in appreciable quantities. The cakes were formed during the atmospheric leaching. In the case if the sodium sulphite is not added in the initial pulp, the final cakes contain nontronite and, in smaller quantities, chlorite and bowlingite. There was conjectured an influence of a peculiarities of a crystalline structure of smectites on a change of a leaching mode. The cited data allows to consider that the developed way of autoclave leaching of oxidized nickel ores with usage of an elemental sulfur, can compete with the sulphuric acid autoclave leaching because of the comparative cheapness of the basic reagent and more lower values of the technological parametres of the process.

keywords Oxidized nickel ore, autoclave leaching, elemental sulfur, smectites, nontronite, chlorites, nickel, cobalt, iron oxides

1. Veyzager M. L., Shneerson Ya. M. Novye protsessy v metallurgii nikelya, medi i kobalta: teoriya i praktika (New processes in metallurgy of nickel, copper and cobalt : theory and practice). Trudy Zakrytogo Aktsionernogo Obshchestva “Institut Gipronikel” (Proceedings of LLC “Gipronickel” Institute). Moscow : “Ruda i Metally” Publ., 2000. pp. 73–91.
2. Sobol S. I. Metod sulfidirovaniya nikelya i kobalta v okislennykh rudakh (Approach of a sulfuring of nickel and cobalt in oxidized ores). Certificate of Authority No. 108670. Published 01 January 1957.
3. Bush P. D., Engle L. F., Geyts E. G., Vayyaragkhavan M. D. Pererabotka lateritovykh i sulfidnykh nikelevykh rud s primeneniem avtoklavnykh protsessov vyshchelachivaniya i tsementatsii iz pulpy (Processing of lateritic and sulfite nickel ores with using the autoclave leaching processes and cementation from the pulp). Gidrometallurgiya (Hydrometallurgy). Moscow : Metallurgiya, 1978. pp. 324–350.
4. Ferron C. J., Fleming C. A. Sovmestnoe obogashchenie limonitnogo laterita i soderzhashchikh seru materialov kak alternativa protsessu kislotnogo vyshchelachivaniya pri vysokom davlenii (Combined benefication of the limonite latertite and materials, which contain sulfur as an alternative to the process of the acid leaching with high pressure). International Laterite Nickel Symposium — 2004. The Minerals Metals & Materials Society. 2004. pp. 245–261.
5. Serova N. V., Olyunina T. V., Lysykh M. P. et al. Tekhnologiya Metallov — Technology of metals. 2009. No. 9. pp. 9–14.
6. Serova N. V., Kitay A. G., Olyunina T. V. et al. Khimicheskaya Tekhnologiya — Chemical Engineering. 2010. No. 3. pp. 153–158.
7. Geologicheskie osobennosti mestorozhdeniy, veshchestvennyy sostav rud i osnovnye metody ispolzovaniya okislen nykh nikelevykh rud SSSR (Geological peculiarities of the deposits, material composition of ores and basic methods of using the oxidized nickel ores in USSR). Trudy Zakrytogo Aktsionernogo Obshchestva “Institut Gipronikel” (Proceedings of LLC “Gipronickel” Institute). 1969. Iss. 39/40. 270 p.
8. Malinskiy R. A., Serova N. V., Lysykh M. P. et al. Tsvetnye Metally — Non-ferrous metals. 2008. No. 11. pp. 68–71.
9. Johnson J. A., McDonald R. G. et al. Hydrometallurgy. 2005. Vol. 78. No. 3–4. pp. 264–270.
10. Kalashnikova M. I., Shneerson Ya. M. et al. Tsvetnye Metally – Non-ferrous metals. 2003. No. 12. pp. 22–27.

11. Whittington B. J., Johnson J. A. et al. Hydrometallurgy. 2003. Vol. 70. pp. 47–62.
12. Sokolova G. A., Dronova T. Ya., Tolpeshta I. I. Glinistye mineraly v pochvakh (Clay minerals in soils). Tula : Grif and K, 2005. 336 p.
13. Ginzburg I. I., Belyatskiy V. V. et al. Razlozhenie mineralov organicheskimi kislotami : sbornik. Eksperimentalnoe issledovanie po razlozheniyu mineralov organicheskimi kislotami (Decompo sition of minerals by organic acids : collection. Experimental research on minerals decomposition by organic acids). Moscow : Nauka, 1968. pp. 18–65.
14. McDonald R. G., Whittington D. J. Hydrometallurgy. 2008. Vol. 91. pp. 35–55.

Language of full-text russian
Full content Buy