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Article

Optimization of Parameters for the Dissolution of Mn from Manganese Nodules with the Use of Tailings in An Acid Medium

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Departamento de Ingeniería en Metalurgia y Minas, Universidad Católica del Norte, Av. Angamos 610, Antofagasta 1270709, Chile
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Departamento de Ingeniería Minera y Civil. Universidad Politécnica de Cartagena, Paseo Alfonso Xlll N°52, 30203 Cartagena, Spain
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Departamento de Ingeniería Industrial, Universidad Católica del Norte, Av. Angamos 610, Antofagasta 1270709, Chile
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Departamento de Ingeniería en Metalurgia, Universidad de Atacama, Av. Copayapu 485, Copiapó 1531772, Chile
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Departamento de Ingeniería Química y Procesos de Minerales, Universidad de Antofagasta, Avda. Angamos 601, Antofagasta 1240000, Chile
*
Author to whom correspondence should be addressed.
Minerals 2019, 9(7), 387; https://doi.org/10.3390/min9070387
Received: 25 May 2019 / Revised: 23 June 2019 / Accepted: 24 June 2019 / Published: 26 June 2019
(This article belongs to the Special Issue Recent Advances in Hydro- and Biohydrometallurgy)
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 different 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 of time (5 to 20 min) operating with an optimum MnO2/Fe2O3 ratio of 1:3 and a concentration of 0.1 mol/L of H2SO4. View Full-Text
Keywords: leaching; manganese nodules; optimization of parameters; tailings leaching; manganese nodules; optimization of parameters; tailings
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MDPI and ACS Style

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. https://doi.org/10.3390/min9070387

AMA Style

Toro N, Saldaña M, Gálvez E, Cánovas M, Trigueros E, Castillo J, Hernández PC. Optimization of Parameters for the Dissolution of Mn from Manganese Nodules with the Use of Tailings in An Acid Medium. Minerals. 2019; 9(7):387. https://doi.org/10.3390/min9070387

Chicago/Turabian Style

Toro, Norman, Manuel Saldaña, Edelmira Gálvez, Manuel Cánovas, Emilio Trigueros, Jonathan Castillo, and Pía C. Hernández 2019. "Optimization of Parameters for the Dissolution of Mn from Manganese Nodules with the Use of Tailings in An Acid Medium" Minerals 9, no. 7: 387. https://doi.org/10.3390/min9070387

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