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Kinetics of Sulphric Acid Curing-Roasting of Nickel Laterite for Recovering Nickel and Cobalt
Corresponding Author(s) : Qinghua Tian
Asian Journal of Chemistry,
Vol. 25 No. 5 (2013): Vol 25 Issue 5
Abstract
The techniques such as X-ray fluorescence, X-ray diffraction and scanning electron microscope were used to describe the nickel laterite material's crystal structure and morphology. Nickel and cobalt were extracted from nickel laterite by sulphuric acid curing-roasting-leaching process and the kinetics of sulphuric acid curing-roasting was studied. The results show that the sulphuric acid curing of nickel and cobalt accords with the liquid-solid regional reaction model raised by Bagdasarym and the kinetic equation is expressed as ln [-ln (1-a)] = ln k + n ln t. The activation energies are determined to be 21.45 kJ/mol for nickel and 34.81 kJ/mol for cobalt, respectively which are characteristic for an internal diffusion controlled process.
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References
D. Kempthorne and D.M. Myers, Mineral Commodity Summaries, US Geological Survey. Washington, pp. 143-154 (2010).
D.D. Ashok, W.G. Bacon and C.O. Robert, The Past and the Future of Nickel Laterites, International Convention, Canada (2004).
Z. Liu, H. Yang and Q. Li, Nonferrous Metals (Extractive Metallurgy), 2, 2 (2010).
D. Georgiou and V.G. Papangelakis, Hydrometallurgy, 49, 23 (1998).
M. Zuniga, F. Parada and E. Asselin, Hydrometallurgy, 104, 260 (2010).
B.K. Loverday, Miner. Eng., 21, 533 (2008).
W. Luo, Q. Feng and L. Ou, G. Zhang and Y. Lu, Hydrometallurgy, 96, 171 (2009).
X. Guo, D. Li, K.H. Park, Q. Tian and Z. Wu, Hydrometallurgy, 99, 144 (2009).
D. Li, K.H. Park, Z. Wu and X. Guo, Trans. Nonferrous Met. Soc. China, 20, s92 (2010).
Y.V. Swamy, B.B. Kar and J.K. Mohanty, Hydrometallurgy, 69, 89 (2003)
R.G. McDonald and B.I. Whittington, Hydrometallurgy, 91, 35 (2008).
Q.Y. Han, Dynamics in the Process of Metallurgy, Metallurgy Industry Press, Beijing, pp. 49-54 (1983).
H. Tagawa, Thermochim. Acta, 80, 23 (1984).
Y.-F. Chang, X.-J. Zhai, Y. Fu, B.-C. Li and T.-A. Zhang, J. Mol. Sci., 24, 241 (2008) (In Chinese).
M.-R. Tu and J. Zhou, Chem. Eng., 23, 62 (1995) (In Chinese).