EJMP&EP


Technical Note


Cyanidation of Artvin-Cerattepe region gold-silver ore and the use of hydrogen peroxide

F. Arslan*, D.Y. Ozdamar, M. Muduroglu

Istanbul Technical University, Mining Faculty, Mining Eng. Dept. Mineral and Coal Processing Division, 80626 Maslak, Istanbul, Turkey


Received 18 July 2002; accepted 1 March 2003




ABSTRACT

Cyanide leaching of gold-silver ore, obtained from Artvin-Cerattepe region of Turkey, was investigated. The effects of NaCN concentration, solid/liquid ratio, type of pH adjustment reagent, lead nitrate and hydrogen peroxide (H2O2) additions in relation to the leaching time on gold and silver leaching efficiencies were examined and the optimum cyanide leaching conditions were determined. Almost all gold and 71% of Ag were extracted with the addition of 15 g/l H2O2 during the cyanidation carried out for 48 hours. As a result of this study, it was proven that addition of H2O2 as an oxidant during the cyanide leaching had an increasing effect on the leaching recoveries of Au and Ag, a decreasing effect on the leaching period, and thus an accelerating effect on Ag and Au dissolutions.


Keywords: Gold ores; Cyanidation; Leaching



* Corresponding author
   E-mail : arslanf@itu.edu.tr