Journals →  Tsvetnye Metally →  2020 →  #8 →  Back

ArticleName Nitric acid leaching of the copper-bearing arsenic sulphide concentrate of Akzhal
DOI 10.17580/tsm.2020.08.02
ArticleAuthor Rogozhnikov D. A., Zakharian S. V., Dizer O. A., Karimov K. A.

Ural Federal University named after the First President of Russia B. N. Yeltsin, Yekaterinburg, Russia:

D. A. Rogozhnikov, Senior Researcher, Department of Non-Ferrous Metallurgy, Candidate of Technical Sciences, Assistant Professor, e-mail:
O. A. Dizer, Postgraduate Student, Junior Researcher, Department of Non-Ferrous Metallurgy
K. A. Karimov, Research Fellow, Department of Non-Ferrous Metallurgy, Candidate of Technical Sciences


KazGidroMed, Karaganda, Republic of Kazakhstan:

S. V. Zakharian, Head of the Laboratory, Candidate of Technical Sciences


This paper examines the possibility of using the hydrometallurgical process of nitric acid leaching to process the refractory sulphide concentrate of Akzhal. The study that looked at the structure and composition of this material confirmed that the studied material has a complex mineralogy due to dissemination of gold-bearing sulphides (mainly pyrite and arsenopyrite) in the gangue and their interpenetration, as well as the presence of finely dispersed gold (10 μm) in tight assemblage with the host minerals. A series of laboratory tests, as well as mathematical experimental design techniques, helped identify the most critical parameters governing the leaching efficiency. The following process parameters are recommended: nitric acid concentration — 5 mol/dm3, L/S = 5:1,  = 1 h. A high recovery into solution can be achieved in the above conditions, %: >98 Fe; >96 As; >90 S. The authors propose to use atmospheric deposition of scorodite to dispose of leach liquors. This is achieved by means of staged neutralization until the concentration of arsenic in the liquor reaches 20 mg/dm3. Sorption techniques are applied to recover copper and zinc from leach liquors. Leach cakes are subjected to sorption cyanidation with the total recoveries of gold and silver of >94 and >64%, correspondingly. The nitrous gas recovery stage proved highly efficient — >90%. A series of pilot tests was carried out to verify the findings. Thus, the developed hydrometallurgical process was applied to the copper-bearing arsenic sulphide concentrate of Akzhal at the testing facility of KazGidroMed, a research centre for innovative technology. The tests enabled to conduct a feasibility study, which proved the proposed processing techniques to be efficient and feasible.
This research study was funded by the Russian Science Foundation (Project no. 18-19-00186).
The study of arsenic precipitation from leach liquor was funded by the Russian Foundation for Basic Research under the Research Project no. 18-38-00914\18.

keywords Nitric acid, arsenic sulphide concentrate, leaching, gold, pyrite, arsenopyrite

1. Seytkan A. S. Use of collector smelting to process the refractory gold-arsenic concentrates of Barykchik: Physical and chemical basis of the process. Ust Kamenogorsk : Izdatelstvo VKGU, 2012. 148 p.
2. Chen T. T., Cabri L. J., Dutrizac J. E. Characterizing gold in refractory sulfide gold ores and residues. JOM. 2002. Vol. 54. pp. 20–22.
3. La Brooy S. R., Linge H. G., Walker G. S. Review of gold extraction from ores. Minerals Engineering. 1994. Vol. 7. pp. 1213–1241.

4. Vorobiev-Desyatovskiy N. V. Refractory and double refractory gold ores. Russia’s problem of the present and the future and possible solutions. Proceedings of the International Conference “Intensification of hydrometallurgical processes in the processing of natural and man-made materials. Technology and equipment”. Saint Petersburg, 28 May – 1 June 2018. pp. 18, 19.
5. Dreisinger D. Hydrometallurgical process development for complex ores and concentrates. Journal of the Southern African Institute of Mining and Metallurgy. 2009. Vol. 109. pp. 253–271.
6. Zakharov B. A., Meretukov M. A. Gold: Refractory Ores. Moscow : “Ore and Metals” Publishing House, 2013. 452 p.
7. Bespaev Kh. A., Globa V. A., Abishev V. M., Gulyaeva N. Ya. Gold depo sits of Kazakhstan. Reference book. Almaty : Informatsionno-analiticheskiy tsentr geologii, ekologii i prirodnykh resursov Respubliki Kazakhstan, 1997. 232 p.
8. Karimova L. M. The scientific basis of granulation, roasting and leaching in the hydrometallurgical processing of non-commercial copper and copper-molybdenum materials : Abstract of doctoral dissertation. Yekaterinburg, Karaganda, 2018. 46 p.
9. Zakharian S. V., Karimova L. M., Naboychenko S. S., Rogozhnikov D. A. Sorption of copper on the Lewatit Monoplus TP-220 ionite from nitric leach solutions of copper concentrate. Vestnik Irkutskogo gosudarstvennogo tekhnicheskogo universiteta. 2018. Vol. 23, No. 6. pp. 204–212.
10. Rogozhnikov D. A., Rusalev R. E., Dizer О. А., Naboychenko S. S. Nitric acid loosening of rebellious sulphide concentrates containing precious metals. Tsvetnye Metally. 2018. No. 12. pp. 38–44.
11. Rogozhnikov D. A., Shoppert A. A., Dizer O. A., Karimov K. A. et al. Leaching kinetics of sulfides from refractory gold concentrates by nitric acid. Metals. 2019. Vol. 9, No. 4. p. 465.
12. Jian L., Shuming W., Dan L., Mengyang L. Response surface methodology for optimization of copper leaching from a lowgrade flotation middling. Minerals and Metallurgical Processing. 2011. No. 3. pp. 139–145.
13. Gomez M. A. The effect of copper on the precipitation of scorodite (FeAsO4·2H2O) under hydrothermal conditions: Evidence for a hydrated copper containing ferric arsenate sulfate-short lived intermediate. Journal of Colloid and Interface Science. 2011. Vol. 360. pp. 508–518.
14. Yang B., Zhang G. L., Deng W., Ma J. Review of arsenic pollution and treatment progress in nonferrous metallurgy industry. Advanced Materials Research. 2013. Vol. 634–638. pp. 3239–3243.
15. Snyders C. A., Akdogan G., Bradshaw S. M., Van Wyk A. P. Gold CIP and CIL process optimization in a capital constraint environment. Journal of the Southern African Institute of Mining and Metallurgy. 2017. Vol. 117, No. 8. pp. 819–828.
16. Kotlyar Yu. A., Meretukov M. A., Strizhko L. S. Metallurgy of noble metals: Textbook. In 2 parts. Part 1. Moscow : MISiS, Ore and Metals, 2005. pp. 333–334.
17. Troshkina I. D., Zakharyan S. W., Yun A. B., Gedgagov E. I. The recovery of rare metals from a sulphuric acid scrub solutions generated during the complex processing of copper sulphide ore. Advances in Chemistry Research. Ed. J.C. Taylor. New-York : Nova Science Publishers Inc, 2018. Vol. 45. pp. 43–76.
18. Filippov A. P., Nesterov Yu. V. Redox processes and intensification of metal leaching. Moscow : “Ore and Metals” Publishing House, 2009. 543 p.
19. Penman S. Financial Statement Analysis and Security Valuation. New York, 2000.

Language of full-text russian
Full content Buy