Optimization of parameters for the dissolution of Mn from manganese nodules with the use of tailings in an acid medium
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Toro Villarroel, Norman Rodrigo; Saldaña Pino, Manuel; Gálvez Ahumada, Edelmira; Cánovas Vidal, Manuel; Trigueros Tornero, Emilio; [et al.]Área de conocimiento
Explotación de MinasPatrocinadores
The authors are grateful for the contribution of the Scientific Equipment Unit- MAINI of the Universidad Católica del Norte for aiding in generating data by automated electronic microscopy QEMSCAN®, and for facilitating the chemical analysis of the solutions. We are also grateful to the Altonorte Mining Company for supporting this research and providing slag for this study, and we thank Marina Vargas Aleuy, María Barraza Bustos and Carolina Ossandón Cortés of the Universidad Católica del Norte for supporting the experimental tests.Fecha de publicación
2019-06Editorial
MDPI AGCita bibliográfica
Toro, N.; Saldaña, M.; Gálvez, E.; Cánovas, M.; Trigueros, E.; Castillo, J.; Hernández, P.C. Optimization of parameters for the dissolution of Mn from manganese nodules with the use of tailings in An acid medium. Minerals 2019, 9, 387.Palabras clave
LeachingManganese nodules
Optimization of parameters
Tailings
Resumen
Manganese nodules are an attractive source of base metals and critical and rare elements and are required to meet a high demand of today’s industry. In previous studies, it has been shown that high concentrations of reducing agent (Fe) in the system are beneficial for the rapid extraction of manganese. However, it is necessary to optimize the operational parameters in order to maximize Mn recovery. In this study, a statistical analysis was carried out using factorial experimental design for the main parameters, including time, MnO2/Fe2O3 ratio, and H2SO4 concentration. After this, Mn recovery tests were carried out over time at di_erent ratios of MnO2/Fe2O3 and H2SO4 concentrations, where the potential and pH of the system were measured. Finally, it is concluded that high concentrations of FeSO4 in the system allow operating in potential and pH ranges (0.2 to 1.2 V and 1.8 to 0.1) that favor the formation of Fe2+ and Fe3+, which enable high extractions of Mn (73%) in short periods ...
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