Extraction of Mn from Black Copper Using Iron Oxides from Tailings and Fe2+ as Reducing Agents in Acid Medium
Author
Pérez, Kevin; Toro Villarroel, Norman Rodrigo; Bueno Campos, Eduardo; González, Javier; Jeldres Valenzuela, Ricardo Iván; [et al.]Knowledge Area
Ingeniería del TerrenoIngeniería QuímicaQuímica-FísicaSponsors
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 to Marina Vargas Aleuy and María Barraza Bustos of the Universidad Católica del Norte for supporting the experimental tests. Also, we Conicyt Fondecyt 11,171,036 and Centro CRHIAM Project Conicyt/Fondap/15130015. This research received no external fundingRealizado en/con
Universidad Politécnica de Cartagena; Universidad Católica del Norte; Universidad de Antofagasta; Universidad de AtacamaPublication date
2019-10-18Publisher
MDPIBibliographic Citation
Pérez K, Toro N, Campos E, González J, Jeldres RI, Nazer A, Rodriguez MH. Extraction of Mn from Black Copper Using Iron Oxides from Tailings and Fe2+ as Reducing Agents in Acid Medium. Metals. 2019; 9(10):1112. https://doi.org/10.3390/met9101112Peer review
SiKeywords
Waste treatmentReducing agent
Manganese
Abstract
Exotic type deposits include several species of minerals, such as atacamite, chrysocolla, copper pitch, and copper wad. Among these, copper pitch and copper wad have considerable concentrations of manganese. However, their non-crystalline and amorphous structure makes it challenging to recover the elements of interest (like Cu or Mn) by conventional hydrometallurgical methods. For this reason, black copper ores are generally not incorporated into the extraction circuits or left unprocessed, whether in stock, leach pads, or waste. Therefore, to dilute MnO2, the use of reducing agents is essential. In the present research, agitated leaching was performed to dissolve Mn of black copper in an acidic medium, comparing the use of ferrous ions and tailings as reducing agents. Two samples of black copper were studied, of high and low grade of Mn, respectively, the latter with a high content of clays. The effect on the reducing agent/black copper ratio and the concentration of sulfuric acid in ...
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