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http://dx.doi.org/10.3365.KJMM.2010.48.01.062

Recovery of Nickel and Cobalt by a Hydrometallurgical Process from Nickel Laterite Ore with High Magnesium Content  

Lee, Manseung (Department of Advanced Materials Science & Engineering, Mokpo National University)
Kim, Sangbae (Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources)
Choi, Youngyun (Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources)
Chae, Jonggwee (Department of Advanced Materials Science & Engineering, Mokpo National University)
Publication Information
Korean Journal of Metals and Materials / v.48, no.1, 2010 , pp. 62-70 More about this Journal
Abstract
Leaching and solvent extraction experiments have been performed to develop a hydrometallurgical process for the recovery of nickel and cobalt from nickel laterite ore with high magnesium content. Most of the nickel and magnesium in the laterite ore dissolved at leaching conditions of $80^{\circ}C$ and 100 g/L sulfuric acid concentration. while half of the cobalt and iron were leached at the same conditions. Solvent extraction experiments were carried out with D2EHPA and saponifed D2EHPA from a synthetic solution containing Ni, Co, and Mg. The extraction percentage of Co, Mg. and Ni by D2EHPA was very low in a pH range of 4.4 to 7.3. while the extraction percentage sharply increased by using saponified D2EHPA. The stripping percentage of the metals from the saponified D2EHPA increased with sulfuric acid concentration and reached 99.9% at 1 M $H_2SO_4$ solution.
Keywords
Ni Laterite ore; Leaching; solvent extraction; stripping D2EHPA;
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