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dc.contributor.authorToro Villarroel, Norman Rodrigo 
dc.contributor.authorPérez Salinas, Kevin 
dc.contributor.authorSaldaña Pino, Manuel 
dc.contributor.authorJeldres Valenzuela, Ricardo Iván 
dc.contributor.authorJeldres, Matías es_ES
dc.contributor.authorCánovas Vidal, Manuel es_ES
dc.identifier.citationToro, N., Pérez, K., Saldaña, M., Jeldres, R., Jeldres, M., & Cánovas, M. (2020). Dissolution of pure chalcopyrite with manganese nodules and waste water. Journal of materials research and technology, 9, 798-805.es_ES
dc.description.abstractChalcopyrite is the most abundant copper ore and, consequently, the most utilised to pro-duce metallic copper. The main route of treatment is through pyrometallurgical processes,but these emit significant quantities of SO2into the atmosphere (e.g. 182,000 t/year among allChilean smelters), producing mighty concern in the community. In this context, hydromet-allurgy is presented as an alternative that may be more environmentally friendly; however,the difficulties of processing sulphide minerals prevent achieving sustainable efficienciesfor the industry. In this research, a pure chalcopyrite mineral is leached at 25◦C with theaddition of manganese nodules as an oxidizing agent, and wastewater with a high con-centration of chloride that both enhances the dissolution and avoid the passivation of thechalcopyrite. The high concentrations of MnO2(4/1 and 5/1) allows that the potential valuescan be between 580 and 650 mV, which favors the dissolution of CuFeS2. The XRD showedthe formation of non-polluting species and, besides, they do not cause obstacles to the cop-per dissolution. High concentrations of chloride enable increasing copper solutions fromCuFeS2, attaining favorable outcomes when working with wastewater instead of seawater.es_ES
dc.description.sponsorshipThe authors are grateful for the contribution of the Scien-tific Equipment Unit- MAINI of the Universidad Católica delNorte for aiding in generating data by automated electronicmicroscopy QEMSCAN®and for facilitating the chemical anal-ysis of the solutions. We are also grateful to Marina VargasAleuy, María Barraza Bustos and Carolina Ossandón Cortésof the Universidad Católica del Norte for supporting theexperimental tests. R.I.J thanks Centro CRHIAM Project Coni-cyt/Fondap/15130015.es_ES
dc.relation.ispartofOptimización de parámetros para la extracción de elementos desde minerales en medios ácidoes_ES
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.titleDissolution of pure chalcopyrite with manganese nodules and waste wateres_ES
dc.subjectChloride mediaes_ES
dc.relation.projectIDProyecto Conicyt Fondap 15130015es_ES
dc.subject.unesco5312.09 Mineríaes_ES
dc.contributor.funderScientific Equipment Unit- MAINI of the Universidad Católica del Norte (Chile)es_ES

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Atribución-NoComercial-SinDerivadas 3.0 España
Except where otherwise noted, this item's license is described as Atribución-NoComercial-SinDerivadas 3.0 España