Show simple item record

dc.contributor.authorToro Villarroel, Norman Rodrigo 
dc.contributor.authorPérez Salinas, Kevin 
dc.contributor.authorBriceño Romero, Williams 
dc.contributor.authorNavarra Lafontaine, Alessandro 
dc.contributor.authorCánovas Vidal, Manuel 
dc.contributor.authorTrigueros Tornero, Emilio
dc.identifier.citation(Artículo en revisión): N. Toro*, W. Briceño, A. Navarra, K. Pérez, M. Cánovas and E. Trigueros. “Statistical and kinetic study for leaching of covellite in a chloride media” Q1 ISI WoS. Journal of Materials Research and Technology.es_ES
dc.description.abstractCovellite is a relatively rare copper sulfide with slow dissolution kinetics. The present investigation used the surface optimization methodology to evaluate the effect of three independent variables (time, chloride concentration and sulfuric acid concentration) on the rate of extracting Cu from covellite. The effects of chloride concentration and temperature over time were also studied. An ANOVA indicated that the linear variables of time and chloride concentration have the greatest influence, this being highly representative (R2 = 0.9945). The highest copper extraction rate (71.23%) at room temperature, was obtained with a high chloride concentration (100 g/L), a low concentration of sulfuric acid (0.5 M), and a leaching period of 600 h. The dissolution is described by the model of the unreacted core, the rate of leaching of the covellite is controlled by the chemical surface reaction at temperatures between 50 and 90°C, with concentrations of 0.5 M of H2SO4, 100 g/L of chloride, and a leaching period of up to 6 hours, where an activation energy of 72.36 kJ/mol was obtaine.es_ES
dc.description.sponsorshipThe 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 Marina Vargas Aleuy and Carolina Ossandón Cortés of the Universidad Católica del Norte for supporting the experimental tests.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.rights© Copyright 2019 Elsevieres_ES
dc.titleStatistical and kinetic study for leaching of covellite in a chloride mediaes_ES
dc.subjectChloride mediaes_ES
dc.subjectKinetic studyes_ES
dc.subject.otherExplotación de Minases_ES
dc.subject.unesco5312.09 Mineríaes_ES
dc.contributor.funderScientific Equipment Unit-MAINI of the Universidad Católica del Norte (Chile)es_ES

Files in this item


This item appears in the following Collection(s)

Show simple item record

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