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Metallurgist
Published in: Metallurgist 9-10/2016

21-01-2016

Leaching Stubborn Oxidized Gold Ores That Contain Copper

Authors: I. R. Boboev, Sh. Bobozoda, L. S. Strizhko

Published in: Metallurgist | Issue 9-10/2016

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Abstract

This article is devoted to the leaching of gold from copper-bearing oxidized stubborn gold ores in the Tarror deposit. The high copper content of the ores makes it difficult to extract gold from them by direct cyanidation. An analysis of the literature data indicated that ammoniacal leaching might be one solution to this problem. It is shown that the use of ammonia compounds in the cyanidation cycle makes it possible to obtain high indices for gold recovery without the accumulation of complex copper compounds in the solution. The amount of cyanide consumed in the production process is reduced accordingly.
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Footnotes
1
The pH was not kept at the level 10.5–11.5 because the main goal was to determine the effectiveness of the method based on the increase in gold recovery, not the decrease in the concentration of copper in the solution.
 
Literature
1.
L. S. Strizhko, Sh. Bobozoda, B. R. Boboev, and B. R. Berger, “Extraction of gold from gold- and copper-bearing ores,” Tsvet. Met., No. 6 37–41 (2014).
2.
L. S. Strizhalo, B. A. Bobokhonov, and I. R. Boboev, “Study and development of a technology for recovering gold from oxidized ores in one of Tajikistan’s largest deposits,” Tsvet. Met., No. 7, 41–44 (2012).
3.
Zh. Fang, “Leach out gold and silver from sulfide concentrate copper with cyanide and ammonia solutions,” Miner. Eng., 2, No. 1, 43–53 (1992).
4.
V. A. Zakharov and M. A. Meretukov, Gold: Stubborn Ores, Ruda i Metally, Moscow (2013).
5.
L. S. Strizhko, The Metallurgy of Gold and Silver: Textbook, MISiS, Moscow (2001).
6.
V. M. Lodeishchikov, O. D. Khmel’nitskaya, and G. I. Voiloshnikov, “Ammoniacal cyanidation of copper-bearing gold ores,” Tsvet. Met., No. 8, 87–90 (2010).
7.
A. Yu. Koblov and V. E. Dement’ev, “Cyanidation of gold-copper concentrates with low concentrations of sodium cyanide,” Vestn. Irkutsk. Gos. Tekh. Univ., 43, 84–87 (2010).
8.
M. I. Jeffrey, L. Linda, P. L. Breuer, and C. K. Chu, “A kinetic and electrochemical study of the ammonia cyanide process for leaching gold in solution containing copper,” Miner. Eng., 8, No. 15, 1173–1180 (2002).CrossRef
Metadata
Title
Leaching Stubborn Oxidized Gold Ores That Contain Copper
Authors
I. R. Boboev
Sh. Bobozoda
L. S. Strizhko
Publication date
21-01-2016
Publisher
Springer US
Published in
Metallurgist / Issue 9-10/2016
Print ISSN: 0026-0894
Electronic ISSN: 1573-8892
DOI
https://doi.org/10.1007/s11015-016-0200-3

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