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INTRODUCTION OF SELECTIVE COPPER SULPHIDE LEACHING FROM GOLD CONCENTRATE



Majority of gold processing plants treat ore containing sulphide minerals. As a rule, gold in such raw material is partly free and partly associated with sulphides. Such ore is mainly subjected to processing by flotation. This article discusses the flotation technology for sulphide gold-bearing material in terms of Taldybulak Levoberezhny deposit ore. For the test ore, material constitution is described and phase composition of the main metals, which is of interest, is presented. The flotation performance in this case is efficient. On the other hand, the resultant gold concentrate (essentially rich) contains much copper which causes some difficulties in further cyanide leaching of gold. Based on the large bulk of data of check tests, the new processing technology is approved and introduced. The extension of the flotation circuit by means of adding the stage of selective copper flotation from gold concentrate is proved to be essential and efficient. The by-removal of copper from the process circuit before leaching will enable decreasing negative impact of copper and obtaining a complementary marketable product—gold-bearing copper concentrate. The main and recommended technologies are compared based on their performance capabilities. The key factors of efficiency of the developed technology are discussed.



: 7
2018
УДК: 622.7.017.24
DOI: 10.25018/0236-1493-2018-7-0-139-145
Authors: Wen Yafeng, Izabaev U. D., Ukubaev A. K., Zavarukhina E. A.

Authors' Information:
Wen Yafeng (1), Deputy General Director, e-mail: 2667738296@qq.com,
Izabaev U.D. (1), First Deputy General Director, e-mail: uizabaev@mail.ru,
Ukubaev A.K. (1), Candidate of Technical Sciences, Chief Engineer PTD, e-mail: ukubaew@mail.ru,
Zavarukhina E.A., Junior Researcher, e-mail: ekaterina-0509@yandex.ru,
Institute of Problems of Comprehensive Exploitation of Mineral Resources
of Russian Academy of Sciences, 111020, Moscow, Russia,
1) Altynken Co.LTD, Chui region, Kemin district, Orlovko city, Kyrgyz Republic.

Key words:
Flotation, gold, recovery, leaching, selectivity, cyanides, ecology, integrated use, efficiency.

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