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 a-Diiminas como inhibidores de corrosión: efecto de la ruta de síntesis

Corrosión de acero al carbono en presencia de inhibidores de corrosión e hidrocarburo

Silver Recovery from Radiographic Films Using an Electrochemical Reactor

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

Pyrite?Arsenopyrite Galvanic Interaction and Electrochemical Reactivity

Inhibition on Carbon Steel Corrosion in Presence of Hydrocarbon

Comparación electroquímica de compuestos quirales tipo imina

Galvanic interactions between galenasphalerite and their reactivity

Uso de un reactor electroquímico tipo prensa para recuperar plata contenida en placas radiográficas

Electrodepósito de plata de las soluciones provenientes de los desechos de la industria fotográfica