Journals →  Obogashchenie Rud →  2021 →  #2 →  Back

ArticleName Influence of the ore reduction method on the percolation leaching efficiency
DOI 10.17580/or.2021.02.03
ArticleAuthor Fedotov P. K., Senchenko A. E., Fedotov K. V., Burdonov A. E.

Irkutsk National Research Technical University (Irkutsk, Russia):

Fedotov P. K., Professor, Doctor of Engineering Sciences, Professor,
Fedotov K. V., Head of Chair, Doctor of Engineering Sciences, Professor,
Burdonov A. E., Associate Professor, Candidate of Engineering Sciences, Associate Professor,

Institute «Technologies of Mineral Separation» (Institute TOMS, Irkutsk, Russia):
Senchenko A. E., General Director,


This paper covers gold leaching from sulfide ores. The data on the silicate, mineral, and grain-size composition are presented for the ore studied. Agitation leaching studies were completed for the combined sample and direct cyanidation dynamics indicators are established for the material sample. For all material with the grain size class of 95 % passing –0.074 mm, the required agitation leaching duration is 9–10 hours; with the material sizes up to 2 mm, the leaching duration shall be at least 22 hours. In order to study the efficiency of using roller presses as an alternative to fine crushing, two percolation leaching tests were conducted for the ore size of –5 mm. The material for the first test was prepared by crushing in a standard jaw crusher and the material for the second test was prepared by crushing in a laboratory press with complex monolayer reduction. It has been found that ore reduction using high-pressure crushers, as compared to standard crushing equipment, allows increasing gold recovery during subsequent leaching by 13.52 %. At the same time, the consumption of sodium cyanide increases by 0.26 kg/t of ore.

keywords Ore, gold, percolation leaching, reduction, jaw crusher, recovery, roller press, HPGR

1. Kradenyh I. A. Evaluation of economic efficiency of gold mining companies taking into account influencing factors. Gorny Informatsionno-analiticheskiy Byulleten'. 2017. No. 24. pp. 390–401.
2. Fedotov P. K., Senchenko A. E., Fedotov K. V., Burdonov A. E. Hydrometallurgical processing of gold-containing ore and its washed products. Metalurgija. 2021. Vol. 60, No. 1–2. pp. 85–88.
3. Bai S.-J., Li C., Fu X., Wu M., Wen S.-M. Beneficiation of micro-fine magnetic minerals from reductive iron ore with ultrafine grinding-magnetic flocculation separation. Separation Science and Technology. 2018. Vol. 53, Iss. 1. pp. 136–145.
4. Aksenov A. V., Vasiliev A. A., Okhotin V. N., Senchenko A. E., Yakovlev R. A. Ultrathin grinding in modern technological schemes of mineral raw materials processing. Metallurg. 2015. No. 3. pp. 70–75.
5. Tang Y., Yin W., Huang S., Xue J., Zuo W. Enhancement of gold agitation leaching by HPGR comminution via microstructural modification of gold ore particles. Minerals Engineering. 2020. Vol. 159. Article 106639. DOI: 10.1016/j.mineng.2020.106639.
6. Tang Y., Yin W., Wang J., Zuo W., Cao S. Effect of HPGR comminution scheme on particle properties and heap leaching of gold. Canadian Metallurgical Quarterly. 2020. Vol. 59, Iss. 3. pp. 324–330.
7. Celik I. B., Oner M. The influence of grinding mechanism on the liberation characteristics of clinker minerals. Cement and Concrete Research. 2006. Vol. 36, Iss. 3. pp. 422–427.
8. Tavares L. M. Particle weakening in high-pressure roll grinding. Minerals Engineering. 2005. Vol. 18, Iss. 7. pp. 651–657.
9. Yin W., Tang Y., Ma Y., Zuo W., Yao J. Comparison of sample properties and leaching characteristics of gold ore from jaw crusher and HPGR. Minerals Engineering. 2017. Vol. 111. pp. 140–147.
10. Rashidi S., Rajamani R. K. HPGR rolls surface wear: in-line scanning of a laboratory-scale HPGR. Mining, Metallurgy and Exploration. 2020. Vol. 37, Iss. 1. pp. 239–249.
11. Peng-yun X., Cong H., Min G., Jing L., Xu P., Hong-qi Y. Analyses on uniformity of particles under HPGR finished grinding system. Journal of Central South University. 2018. Vol. 25, Iss. 5. pp. 1003–1012. DOI: 10.1007/s11771-018-3800-1.
12. Nejad R. K., Sam A. Limitation of HPGR application. Transactions of the Institutions of Mining and Metallurgy. Section C: Mineral Processing and Extractive Metallurgy. 2017. Vol. 126, Iss. 4. pp. 224–230.
13. Fedotov P. K. Modeling fracture of ore particles in a layer under pressure. Journal of Mining Science. 2015. Vol. 50, Iss. 4. pp. 674–679.
14. Gutsche O., Fuerstenau D. W. Influence of particle size and shape on the comminution of single particles in a rigidly mounted roll mill. Powder Technology. 2004. Vol. 143–144. pp. 186–195.
15. Saramak D., Krawczykowska A., Mlynarczykowska A. Effects of high pressure ore grinding on the efficiency of flotation operations. Archives of Mining Sciences. 2014. Vol. 59, Iss. 3. pp. 731–740.
16. Solomon N., Becker M., Mainza A., Petersen J., Franzidis J.-P. Understanding the influence of HPGR on PGM flotation behavior using mineralogy. Minerals Engineering. 2011. Vol. 24, Iss. 12. pp. 1370–1377.
17. Kelly E. G., Spottiswood D. J. The breakage function; What is it really. Minerals Engineering. 1990. Vol. 3, Iss. 5. pp. 405–414.
18. Ghorbani Y., Mainza A. N., Petersen J., Becker M., Franzidis J.-P., Kalala J. T. Investigation of particles with high crack density produced by HPGR and its effect on the redistribution of the particle size fraction in heaps. Minerals Engineering. 2013. Vol. 43–44. pp. 44–51.

Language of full-text russian
Full content Buy