Mining Institute of the Far Eastern Branch, Russian Academy of Sciences (Khabarovsk, Russia)

Sekisov A. G., Doctor of Technical Sciences, Deputy CEO for Research, sekisovag@mail.ru
Rasskazova A. V., Candidate of Technical Sciences Leading Researcher, annbot87@mail.ru
Konareva T. G., Senior Researcher
Kirilchuk M. S., Junior Researcher

The geological and technological characteristics of complex copper-goldiron-containing ores for the assessment of their processing by different methods, including heap leaching are examined in this paper. It is proposed to sort out geological and technological subtypes of ores based on iron content. Crushed ore with a high iron content should be processed by magnetic separation, followed by pelletizing and heap leaching of copper and gold from the tailings. Ore with a low iron content, after fine crushing, is sent to direct heap leaching of gold and copper. Ore is pre-treated (cured) with solutions containing highly active oxygen-containing oxidizers synthesized through electrochemical processing. After curing, heap leaching is carried out by irrigation with activated solutions containing oxidizers and a complexing agent for copper and gold. The feasibility of testing such ores for the design of a heap leaching system using standard and activated process solutions under various hydrodynamic irrigation regimes is substantiated.
The research was conducted using the resources of the Center for Collective Use of Mineral Resources, which is funded by the Russian Federation through the Ministry of Education and Science of the Russian Federation under Agreement No. 075-15-2025-621.

1. Aleksandrova T. N. Complex and deep processing of mineral raw materials of natural and technogenic origin: state and prospects. Journal of Mining Institute. 2022. Vol. 256. p. 503–504.
2. Fazlullin M. I. (ed.). Underground and heap leaching of uranium, gold, and other metals. In 2 volumes. Vol. 2: Gold. Moscow: “Ore and Metals” Publishing House, 2005. 328 p.
3. Chanturiya V. А., Vaisberg L. A., Kozlov А. P. Promising trends in investigations aimed at all-round utilization of mineral raw materials. Obogashchenie Rud. 2014. Iss. 2. pp. 3–9.
4. Baikelova G. Sh., Arykova S. K. Hydrometallurgical processing studies for Altyn-Zhylga ore and tailings. Obogashchenie Rud. 2024. № 2. pp. 8–11.
5. Rasskazova A. V., Konareva T. G., Sobolev A. A., Kirilchuk M. S., Lavrik A. V. Testing of refractory gold-copper ores by the method of activated percolation leaching. Problems of Subsoil Use. 2020. Iss. 2. pp. 90–95.
6. Vigdergauz V. E., Shrader E. A., Kuznetsova I. N., Sarkisova L. M., Makarov D. V., Zorenko I. V., Belogub E. V. Effect of the hypergenesis oxidation on the processing behavior and preparation characteristics of copper-zinc pyritic ore. Journal of Mining Science. 2010. Iss. 6. pp. 672–680.
7. Dementyev E. V., Druzhinina G. Ya., Gudkov S. S. Pile leaching of gold and silver. Irkutsk: Izdatelstvo OJSC “Irgiredmet”, 2004. 352 p.
8. Eppink A., Briesen H. Optimal control of infiltration conditions in heap leaching. Minerals Engineering. 2026. Vol. 236, Pt. 2. 109945.
9. Chanturiya V. А., Chanturiya E. L., Minenko V. G., Samusev А. L. Pilot-scale testing of electrochemical water treatment method in tantalum-niobium ores processing. Obogashchenie Rud. 2017. Iss. 3. pp. 27–35.
10. Patent RU No. 2 647 961 C1, IPC C22B 11/00 (2006.01), C22B 3/04 (2006.01). Sekisov A. G., Rasskazova A. V. Method of leaching gold from refractory ores. Appl. 03.03.2017, publ. 21.03.2018. Bull. No. 9.
11. Jelvez E., Silva J., Diaz-Quezada S., Morales N., Vargas T., Estay H. A novel methodology to generate an optimal irrigation plan on a copper-oxide ore heap leaching process. Minerals Engineering. 2025. Vol. 233. 109660.
12. Larrabure G., Batchelor A., Salinas-Farran L., Neethling S. J., Brito-Parada P. R. Assessing surface-level processes during column leaching: A spatiotemporal and multilevel approach combining XPS and SEMEDS. Minerals Engineering. 2025. Vol. 228. 109359.
13. Olivares B., Araya B., Quintanilla P., Navia D. Saturation regulation in heap leaching: A nonlinear model predictive control approach. Minerals Engineering. 2025. Vol. 229. 109346.
14. Karppinen A., Seisko S., Lundstr m M. Atmospheric leaching of Ni, Co, Cu, and Zn from sulfide tailings using various oxidants. Minerals Engineering. 2024. Vol. 207. 108576.
15. Konstantinova A. V., Konareva T. G., Lavrik N. A. Effect of roasting on fine gold recovery from refractory ores. Mining Informational and Analytical Bulletin. 2026. Iss. 2. pp. 128–141.
16. Mineev G. G., Panchenko A. F. Gold and Silver Solvents in Hydrometallurgy. Moscow: Metallurgy, 1994. 240 p.
17. Sekisov A. G., Alekseev V. S., Litvinova N. M., Konareva T. G., Byankin M. A. The use of mixed-type technologies for mining refractory gold ore placers. Mining Informational and Analytical Bulletin. 2025. Iss. 12. pp. 144–158.
18. Rasskazova A. V., Sekisov A. G., Galimyanov Al. A. Combined blasting–reagent effect on extraction of valuable components from model material. Gornyi Zhurnal. 2024. No. 6. pp. 93–98.