Article

Análisis de las principales variables de proceso que influyen en el rechazo de los cátodos durante el electrorrefino del cobre

Revista de Metalurgia 01/2009; DOI: 10.3989/revmetalm.0729
Source: DOAJ

ABSTRACT An experimental circuit of copper electrorefining using three types of anodes coming from three different Chilean foundries: Hernán Videla Lira, Las Ventanas and El Teniente was used to simulate the electrorefining process. In this circuit the problem of the cathode rejection and the influence of some process variables in this phenomenon were studied. The variables analyzed were: electrolyte cell flow, solids in suspension, current density, lead doping in the anodes and density and particle size of the anodic slimes generated. The main results obtained from the experimental circuit were the following: the electrolyte flow doesn’t affect significantly the cathodic rejection, an increase of current density produces a decrease of cathodic rejections, the presence of the solids in suspension causes cathodes outside of norm, and to bigger quantity of lead in the anodes smallest were the rejections.Se trabajó en un circuito experimental de electrorrefinación de cobre, utilizando tres tipos de ánodos procedentes de tres fundiciones chilenas diferentes: Hernán Videla Lira, Las Ventanas y El Teniente. En este circuito, se estudió el problema del rechazo de cátodos y la influencia de algunas variables de proceso en este fenómeno. Las variables analizadas fueron: flujo de electrolito en la celda, sólidos en suspensión, densidad de corriente, dopado de plomo en los ánodos, densidad de los barros anódicos generados y tamaño de partícula de los barros anódicos. Los principales resultados obtenidos a partir del estudio del circuito experimental fueron los siguientes: el flujo de electrolito no afecta significativamente el rechazo de cátodos, a medida que aumenta la densidad de corriente disminuyen los rechazos, el aumento de los sólidos en suspensión provoca cátodos fuera de norma y a mayor cantidad de plomo en los ánodos menores fueron los rechazos.

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