Hydrometallurgical preparation of high-grade industrial manganese compound from a low-grade spessartine ore by Cyanex®272 extractant
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Date
2020-12-01
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Publisher
Taylor and France
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.
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Keywords
Spessartine ore, manganese, manganese sulphate, solvent extraction, Cyanex®272 extractant
Citation
Abdulkareem A.Y. , Baba A. A., Raji M. A., Ayinla K. I., Shuaib-Babaita Y. L. & Salaudeen O. A. (2020): Hydrometallurgical preparation of high-grade industrial manganese compound from a low-grade spessartine ore by Cyanex®272 extractant, International Journal of Environmental Analytical Chemistry, 100(50), 1-10, Published by Taylor and Francis Ltd., Switzerland. Available online at https://www.tandfonline.com/doi/full/10.1080/03067319.2020.1855335 or https://www.tandfonline.com/action/showAxaArticles?journalCode=geac20 DOI: 10.1080/03067319.2020.1855335