Development of the New Method for Oxidized Nickel Ore Processing


In modern conditions of sharp fluctuations in nickel prices on world markets, the problem of profitability of processing Russian poor oxidized nickel ores (ONO) has arisen. As an alternative to the previously existing in Russia, a sulphidation-reducing smelting on a matte, a hydro-pyrometallurgical method has been proposed for the preparation of complex nickel-, chromium-, manganese-containing ferroalloys. At the first stage, hydrolytic precipitation (with sodium hydroxide) is considered as a method of processing production solutions from heap leaching of ONO. It is established that at pH = 5.5, Al is completely removed in the precipitate as hydroxide. After washing from impurities and calcining, a concentrate containing 50 wt.% Al was obtained. At the second stage, at pH = 9.5, more than 99% of nickel and cobalt oxides, as well as 92% oxide concentrate contains, by weight. %: 67 NiO; 3 CoO; 20 MnO; 9 MgO; 0,2 S. At the third stage, a pyrometallurgical method for smelting complex ferroalloys of the Fe-Ni-Cr- Mn-Si system using refractory ferrosilicochrome as a reducing agent is proposed for the processing of nickel-containing concentrate. The scheme of hydro pyrometallurgical method of ONO processing includes: crushing, heap leaching, hydrolytic precipitation to obtain an aluminum-cobalt and nickel concentrates, silicothermic smelting to obtain complex nickel, chromium, manganese ferroalloys, for smelting of suitable stainless steels.

Keywords: oxidized nickel ores, nickel, cobalt, manganese, leaching, precipitation, roasting, metallothermy

[1] (2013). Results of the 7th international conference ”Price of stainless steel-2013”. Ferrous metals, №. 5, pp.14-16.

[2] Zhuchkov, V.I., Leontyev, L.I., Selivanov, E.N. et al. (2014). Prospects for the production of stainless steel using domestic chrome and nickel ferroalloys in Proceedings of int. scientific-practical conf. ”Modern trends in the theory and practice of mining and processing of mineral and technogenic raw materials.” Vol. 2. - Ekaterinburg: Ed. Training Center UPI.

[3] Zayakin, O.V., Zhuchkov, V.I. and Leont’ev, L.I. (2018). Electric furnace bath structure during high-chromium ferrochrome production. Metallurgist, vol. 62, pp. 493-500.

[4] Mashchenko, V.N., Kniss, V.A., Kobelev, V.A. et al. (2005). Preparation of oxidized nickel ores for smelting. Ekaterinburg: Ural Branch of RAS.

[5] Gavrilov, A.S., Khalezov, B.D., Radushev, A.V. et al. (2017). Percolation leaching of oxidized nickel ores. Butlerov Communications. vol.49, no.2, pp.102-109.

[6] Generalov, V.A., Reznik, I.D. and Kharlakova, T.A. (1995). Methods for producing ferronickel from oxidized nickel ores (part I). Non-ferrous metals, №5, pp.13-17.

[7] Reznik, I.D., Ermakov, G.P. and Shneerson, Ya.M. (2004). Nickel: in 3 vol. Oxidized nickel ores. Characteristic of ores. Pyrometallurgy and hydrometallurgy of oxidized nickel ores vol. 2. Moscow: LLC ”Science and Technology”.

[8] Zayakin, O.V. (2002). Development of rational composition and technology of production of nickel-containing ferroalloys from poor oxidized nickel ores. PhD dissertation thesis IMET UB RAS.

[9] Ntuli, F. and Lewis A.E. (2009). Kinetic modeling of nickel powder precipitation by high-pressure hydrogen reduction. Chemical Engineering Science, vol. 64, pp.2202- 2215.

[10] Wang, K., Li, J., McDonald, R.G. et al. (2011). The effect of iron precipitation upon nickel losses from synthetic atmospheric nickel laterite leach solutions: Statistical analysis and modelling. Hydrometallurgy, vol. 109, pp.140-152.

[11] Coto, O., Galizia, F., Hernandez, I. et al. (2008). Cobalt and nickel recoveries from tailings by organic and inorganic bio-acids. Hydrometallurgy, vol. 94, pp.18-22.

[12] Patent RU 2532871, publ. 10 November 2014, Authors: Kalinichenko, I.I., Vaytner, V.V., Molodykh, A.S. and Shubin, V.N.

[13] (2013). Nickel of the Urals. Ways of development, in Collection of round table materials, pp. 17-21, Ekaterinburg: UrFU.

[14] Kolmachikhina, O.B. (2018). Combined technology for processing oxidized nickel ores (by the example of the Serovskoye deposit). PhD dissertation thesis, Ural Federal University named after first President of Russia B.N. Yeltsin.

[15] Ma, B., Yang, W., Yang, B. et al. (2015). Pilot-scale plant study on the innovative nitric acid pressure leaching technology for laterite ores. Hydrometallurgy, № 155. pp.88- 94.

[16] McDonald, R.G. and Whittington, B.I. (2008). Atmospheric acid leaching of nickel laterites review. Part I. Sulphuric acid technologies. Hydrometallurgy, № 91, pp.35-55

[17] McDonald, R.G. and Whittington, B.I. (2008). Atmospheric acid leaching of nickel laterites review. Part II. Cloride and bio-tecnologies. Hydrometallurgy, № 91, pp.56- 69.

[18] Barbaroux, R., Mercier, G., Blais, J.F. et al. (2011). A new method for obtaining nickel from the hyperaccumulator plant Alyssum murale. Separation and Purification Technology, vol. 83, pp.57-65.

[19] Zhuchkov, V.I., Zayakin, O.V. and Mal’tsev, Yu.B (2001). Study of melting temperatures and density of ferroalloys containing nickel, Melts, № 1, pp. 7-9.

[20] Zayakin, O.V., Zhuchkov, V.I. and Lozovaya, E.Yu. (2007). Melting Time of Nickel- Bearing Ferroalloys in Steel. Steel in Translation, vol. 37, No. 5, pp. 416–418.

[21] Gasik, M.I. and Lyakishev, N.P. (1999). Theory and technology of production of ferroalloys. Moscow: Metallurgy.