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ABSTRACT
This study highlights a hydrometallurgical method for the purification, extraction, and beneficiation of a multi-elemental leach liquor obtained via reductive leaching of spessartine ore, for the production of high-grade manganese compound. During these treatments, the effect of Cyanex®272 concentrations, pH, aqueous: organic (A/O) was quantified. At optimal conditions (Temperature = 27 ± 2°C, 0.2 mol/L Cyanex®272, pH = 4.5, A/O = 1:1), manganese extraction efficiency was >90%. The stripping of the loaded organic phase by 0.1 mol/L sulphuric acids yielded 95.7% in a single stripping stage. The resulting aqueous solution was appreciably beneficiated to produce manganese sulphate monohydrate (MnSO4.H2O: 49–315-9500, melting point = 702.8°C) via precipitation and crystallisation methods. Finally, a flow sheet summarising the analytical treatment steps was provided.
Acknowledgments
The authors are grateful to
Central Research Laboratories, University of Ilorin, Nigeria for assisting in aqueous metal analyses by AAS.
Hydro & Electrometallurgy Department of the CSIR-Institute of Minerals and Materials Technology, Bhubaneswar-751013, India for their benevolence in supplying the CYANEX®272 extractant used in this study.
Disclosure statement
No potential conflict of interest was reported by the author(s).