Abstract

ROJAS R., NÉSTOR R.  and  BUSTAMANTE R., M. OSWALDO. COPPER DISSOLUTION FROM CUPRIC FERRITE IN CONVENTIONAL CYANIDATION. Dyna rev.fac.nac.minas [online]. 2007, vol.74, n.152, pp.151-157. ISSN 0012-7353.

This paper presents the principal results of the residue cyanidation from the lixiviation of a white metal oxidized calcine with high content of copper (10,6%) as cupric ferrite. The gold and silver grades of this residue are 38,5 and 1085 g/ton respectively. The copper extraction is lower than those reported on the literature. Under complete gold extraction conditions, the copper extraction is only 0,36% in contrast with 5% obtained from an extraction of 60% of silver. It is possible that the high refractority of copper, as a cupric ferrite, is the cause of the low dissolution of this metal in cyanide.

Keywords : Cyanidation; copper contamination; cupric ferrite.

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