Producción Científica Profesorado

Galvanic interactions between galenasphalerite and their reactivity



Veloz Rodríguez, María Aurora

2006

Galvanic interactions between galena-sphalerite and their reactivity, G. Urbano, A. M. Meléndez, V. E. Reyes, M. A.Veloz and I. González. International Journal of Mineral Processing. (on line) doi:101016/j.minpro.2006.09.004 (2006), 82 (2007) 148-155. ISSN 0301-7516.


Abstract


The galvanic effect between the main associated mineralogical phases in a mineral sphalerite concentrate was evaluated using an alternative methodology. Comparative voltammetric studies were performed between high purity galena mineral (94.65%) and sphalerite concentrate (content of 78.11% sphalerite, ZnS; 13.64% galena, PbS; 0.57% chalcopyrite, CuFeS2; 0.41% cadmium sulfide, CdS; and 0.11% arsenopyrite, FeAsS) using carbon paste electrodes (CPE) in order to identify galvanic interactions that affect their reactivity. The electrolyte was an aqueous solution of 0.1 M NaNO3 (pH 6.5). The results showed that, in sphalerite concentrate, the electrochemical reactivity of the galena was diminished and displaced to more positive potentials with respect to the high purity galena mineral response. This behavior can be attributed to the galvanic protection offered by the sphalerite on the galena, thereby avoiding its free oxidation. On the other hand, sphalerite oxidation was diminished by the formation of a passive products film that is dissolved to more positive potentials which provokes oxidation of other minerals like CuFeS2, (Zn,Cd)S and FeAsS present in a minor proportion in the sphalerite concentrate.



Producto de Investigación




Artículos relacionados

Evaluación de un derivado piridínico como inhibidor de corrosión en medio ácido

Corrosion of Carbon Steel in Presence of Hydrocarbon

Corrosión de acero al carbono en una solución tipo NACE TM 0177 y NACE ID 196 en presencia de hidroc...

Corrosión de acero SAE 1018 en aguas amargas colectadas de la industria del petróleo: efecto de la t...

Estudio Electrocinético en una celda de Electroremediación

Lixiviación electroquímica de metales preciosos de algunos componentes provenientes de aparatos eléc...

Recuperación de plata proveniente de placas radiográficas utilizando un reactor electroquímico tipo ...

Recuperación de Ag sobre Acero Inoxidable en un Reactor electroquímico Tipo Prensa

Estudio electroquímico de la influencia del cobre en la recuperación de plata sobre un sustratos de ...

Caracterización electroquímica de membranas líquidas soportadas para la extracción de Gd (III)