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ArticleName The carbon adsorption of gold from thiocyanate containing sulfuric acid solutions of gold-copper float concentrates atmospheric leaching
DOI 10.17580/tsm.2020.01.06
ArticleAuthor Epiforov A. V., Kozlov A. A., Nemchinova N. V., Seleznev A. N.

Irgiredmet JSC, Irkutsk, Russia:

A. V. Epiforov, Senior researcher, Candidate of Thechnical Sciences, e-mail:

A. N. Seleznev, Researcher, e-mail:


Irgiredmet JSC, Irkutsk, Russia1 ; Irkutsk National Research Technical University, Irkutsk, Russia2:
A. A. Kozlov, Junior researcher1, PhD student2, e-mail:

Irkutsk National Research Technical University, Irkutsk, Russia:

N. V. Nemchinova, Head of the Department of Metallurgy of non-ferrous metals, Doctor of Thechnical Sciences, Professor, e-mail:


The gold dissolution in sulfuric acid media during industrial atmospheric oxidation tests of sulfide gold-copper flotation concentrates was founded. The reason for this was using of technological water containing of thiocyanates and cyanides, which can gold dissolving under these conditions. The carbon in column (CIC) process for gold recovery from these solutions was proposed. However, significant amounts of copper and iron to activated carbon were adsorbed during CIC technology industrial tests. And gold content in loaded carbon did not exceed 0.5 kg/t. For gold and impurities elution and carbon regeneration and activation lab tests were carried out. It was shown, that the copper recovery from loaded carbon during cyanide treatment was about 95%. The copper content in the carbon after cyanide treatment was 1.76 kg/t. The gold recovery during high temperature elution (175–180 oC) by alkaline solution was 98%. The hydrochloric acidic treatment with thermal pretreatment for iron and calcium removing from goldfree carbon was proposed. In this case, the iron and calcium extractions from carbon were 40–45 and 50–55% respectively. These tests shown, that for circulated carbon processing the sequence of operations “cyanide treatment – high temperature gold elution – thermal pretreatment – hydrochloric acidic treatment” can be used. For testing of this processes combination efficiency the carbon before and after processing was tested. It was shown, that the maximum gold content had the fresh activated carbon (5.7 kg/t). The content of gold in regenerated carbon was 4 kg/t. The content of gold in loaded carbon was 1.7 kg/t.

keywords Thiocyanate leaching, recovery of gold, the carbon adsorption, gold elution, copper elution, regeneration of activated carbon, thermal reactivation of carbon

1. Barchenkov V. V. Sorption of gold from technological solutions. Zolotodobycha. 2016. No. 206 (1). pp. 18–23.
2. Barchenkov V. V. Sorption of gold from technological solutions (ending of the article). Zolotodobycha. 2016. No. 207 (2). pp. 16–19.
3. Golden gleanings. Haycarb Activated carbon Solutions. Available at : (Accessed: 15.05.2019).
4. Aylmore M. G. Alternative Lixiviants to Cyanide for Leaching Gold Ores. Gold Ore Processing (Second Edition) Project Development and Operations. 2016. pp. 447–484. DOI: 10.1016/B978-0-444-63658-4.00027-X.
5. Kholmogorov A. G., Pashkov G. L., Kononova O. N., Kononov Yu. S., Plekhanov V. P. Noncyanide solvents for gold recovery from gold-bearing products. Khimiya v interesakh ustoychivogo razvitiya. 2001. No. 9. pp. 293–298.
6. Wan Rong Yu, Levier K. Marc. Precious metal recovery using thiocyanate lixiviant. Patent 7947108 US. Published: 26.11.2009.
7. Marsden J., House I. The chemistry of gold extraction. New York : Ellis Horwood, 1993. 597 p.
8. Li J., Safarzadeh M., Moats M. et al. Thiocyanate hydrometallurgy for the recovery of gold. Hydrometallurgy. 2012. Vol. 113–114. pp. 1–38.
9. Epiforov A. V., Balikov S. V. Pressure oxidation as a universal method for processing sulphide concentrates of precious and base metals. XXIX International Mineral Processing Congress (IMPC 2018). Moscow : Ore and Metals, 2018. pp. 3776–3789.
10. Gathje J. C., Simmons G. L. Method for pressure oxidizing gold-bearing refractory sulfide ores having organic carbon. Patent 5851499 US. Published: 22.12.1998.
11. Epiforov A. V., Dzgoev Ch. T., Nabiulin R. N., Balikov S. V. Behavior of gold during sulfide concentrates pressure oxidation in chlorine presence. Plaksin readings – 2016 : proceedings of international meeting. St. Petersburg, 26–30 September 2016. St. Petersburg : MFC “Gornyy”, 2016. pp. 309–311.
12. Epiforov A. V., Dzgoev Ch. T., Emelianov Yu. E., Evtushevich I. I., Boldyrev A. V. POX pilot plant testing of complex gold-bearing mineral raw materials. Proceedings of Irkutsk State Technical University. 2015. No. 6. pp. 147–151.
13. Meretukov M. A., Sanakulov K. S., Zimin A. V., Arustamyan M. A. Gold: chemistry for metallurgists and dressers. Moscow : Ore and Metals, 2014. 412 p.
14. Ketcham V. J., O’Reilly J. F., Vardill W. D. The Lihir gold project; Process plant design. Minerals and Metallurgical Processing. 1993. Vol. 6, No. 8–10. P. 1037–1065.
15. GOST 16188–70. Sorbents. Method of abrasion resistance determination. Introduced: 01.07.1971.
16. Barchenkov V. V., Gaidukov I. V. How to restore the activated carbon sorption properties. Zolotodobycha. 2017. No. 211 (4). pp. 8–13.
17. Petrov V. F., Fayberg A. A., Petrov S. V., Voyloshnikov G. I. Method of conditioning cyanide-containing circulating solutions of gold-copper ore processing with gold and copper recovery and cyanide regeneration. Patent 2443791 RU. Filed: 13.07.2010. Published: 27.02.2012.
18. Faiberg A. A., Mikhailova A. N., Dementiev V. E., Gudkov S. S. Biogenic Hydrogen Sulfide for Cyanide Regeneration in Solutions during Cupriferous Gold Ores Рrocessing. 22nd International Biohydrometallurgy Symposium рroceedings. Freiberg, Germany, 2017. pp. 131–135.
19. Fleming C. A. Cyanide recovery. Advances in gold ore processing. 2005. Chapter 29. pp. 703–727.
20. Fleming C. A., Melashvili M. The SART process: killing the sacred cows. Proceedings of XXVIII International Mineral Processing Congress (IMPS). Quebec, Canada, 2016. Paper ID: 661.
21. Lawrence R. W., Fleming C. A. Developments and new applications for biogenic sulphide reagent in hydrometallurgy and mineral processing. SGS Minerals services. Technical paper. 2007-02. Available at : (Accessed: 15.05.2019).
22. Barchenkov V. V. Autoclave desorption of gold from loaded carbon. Zolotodobycha. 2017. No. 219 (2). pp. 32–37.
23. Khomutov E. I. Methodological features of determining of compressibility characteristics of gypsum soils using chemical reagents. Available at: (Accessed: 15.05.2019).
24. Belov V. V., Buryanov A. F., Yakovlev G. I., Petropavlovskaya V. B., Fisher H.-B., Mayeva I. S., Novichenkova T. B. Modifying of the structure and properties of building composites based on calcium sulphate: monograph. Ed. A. F. Buryanova. Moscow : De Nova Publishing House, 2012. 196 p.
25. Zelenov V. I. Methodology of the study of gold and silver ores. Moscow : Nedra, 1989. 303 p.

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