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PRETREATMENT OF ANTIMONIAL REFRACTORY GOLD AND SILVER ORES FOR IMPROVED CYANIDATION

O. Celep, I. Alp, H. Deveci

First published: 2010DOI pendingView metrics

Abstract

In this study, the effect of roasting and alkaline sulphide leaching pre-treatments on gold and silver recoveries by cyanidation from an antimonial refractory ore was investigated. Alkaline sulphide leach test for decomposition of antimonial sulphides were performed using Na2S and NaOH solution as leachant. Up to 85\% of antimony was removed by suitably adjusting the molar concentration of the leachant solution over two hours of leach time. Gold recovery in cyanidation was low (≤50\%) without pretreatment, but it was increased to 80\% after alkaline sulphide pretreatment. Similarly, Ag recovery was significantly improved from 5-10\% to 90\% after Na2S pretreatment. This study has shown the feasibility of the alkaline sulphide leaching as pretreatment prior to the conventional cyanidation for antimonial refractory ores.

Publication details

Title
PRETREATMENT OF ANTIMONIAL REFRACTORY GOLD AND SILVER ORES FOR IMPROVED CYANIDATION
Authors
O. Celep, I. Alp, H. Deveci
Proceedings
10th International Multidisciplinary Scientific GeoConference SGEM2010
Publisher
SGEM Scientific GeoConference
Year
2010
Pages
677-682
SWS Citekey
Celep201016
ISSN
1314-2704
ISBN
954-91818-1-2
Language
en
Publication type
Conference Paper
Keywords
alkaline sulphide leachantimony mineralscyanidationrefractory gold-silver oresroasting
References17

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