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CHARACTERIZATION OF REFRACTORY BEHAVIOUR OF KALETAS GOLD ORE BY ULTRAFINE GRINDING AND DIAGNOSTIC LEACHING

AUTHOR/S: O. CELEP, I. ALP, H. DEVECI, T. YILMAZ
Sunday 1 August 2010 by Libadmin2005

5th International Scientific Conference - SGEM2005, www.sgem.org, SGEM2005 Conference Proceedings/ ISBN: 954-918181-2, June 13-17, 2005, 169- 176pp

ABSTRACT

In this study, diagnostic leaching and ultrafine grinding as pretreatment step
ahead of two-stage cyanidation of Kaletaş ore were studied to shed light on the
refractory characteristics of ore. The overall gold extraction of 93% was achieved in
two-stage cyanidation of ultrafinely ground ore suggesting the presence of readily
recoverable gold (74%) and slowly reacting gold (19%) in the ore. Diagnostic leaching
approach provided information into the cause of the refractoriness of the ore. The
findings of diagnostic leaching tests suggested that the refractoriness could be due to
the dissemination and encapsulation of the very fine gold particles largely within the
carbonates, oxides and sulfides and, to a small extent, within silicates present in the ore
matrix .

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