Satbayev University (Almaty, Kazakhstan)

Barmenshinova M. B., Head of Chair, Candidate of Engineering Sciences, Associate Professor, m.barmenshinova@satbayev.university
Motovilov I. Yu., Associate Professor, PhD in Metallurgy, i.motovilov@satbayev.university
Omar R. S., Engineer
Adilzhan Zh., Engineer

The quest for cost-effective methods to process gold-bearing ores is inextricably linked to a series of preliminary studies, including ore composition analysis, evaluation of the occurrence forms of valuable components, and assessment of the impact of impurity elements and ore physical characteristics on gold recovery. Flotation remains a cornerstone technology in the gold mining industry, essential for the beneficiation of gold-bearing ores. Central to this process is the selection of flotation reagents, which enable effective separation of gold from gangue and associated minerals. This study focuses on the flotation of previously unexamined low-sulfide gold-bearing ore from the Aktobe deposit in the Republic of Kazakhstan. Mineralogical and X-ray phase analyses identified quartz, potassium feldspar, calcite, mica, limonite, and sulfides as the principal minerals in the ore. Phase analysis further revealed that 46.47 % of the gold occurs as free cyanidable gold in open intergrowths, while 37.61 % is locked within sulfides, and 15.92% is finely disseminated in waste rock. To optimize the flotation process, the influence of critical parameters such as grinding size, reagent dosages, flotation time, and flotation machine type on gold recovery was systematically investigated. Closed-circuit tests with one and two cleaner flotation stages were performed using the optimized reagent regime. The results have demonstrated that a single cleaner flotation stage achieved a 1.14 % higher gold recovery, reaching 89.84 %. The concentrate obtained after the cleaner flotation contained 23.01 g/t of gold, making it suitable for subsequent hydrometallurgical processing.
This research was funded by the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan (grant No. AP19680182).

1. Komogortsev B. V., Varenichev A. A. The problems of processing poor and insistent gold-bearing ores. Gornyi Informatsionno-analiticheskiy Byulleten'. 2016. No. 2. pp. 204–218.
2. Boduen A. Ya., Poperechnikova O. Yu., Zalesov M. V., Grigoryeva V. A. Experimental testing of technologies for processing refractory gold-bearing raw materials. Tsvetnye Metally. 2022. No. 7. pp. 24–32.
3. Lodeishchikov V. V. Gold mining factories of the world: An analytical review. Irkutsk: Irgiredmet, 2005. 447 p.
4. Tsarkov V. A. Experience of gold extraction enterprises of the world. Moscow: Ruda i Metally, 2004. 112 p.
5. Abdykirova G. Zh., Kenzhaliev B. K., Koyzhanova A. K., Magomedov D. R. Low-sulfide gold-quartz ore concentration potential study. Obogashchenie Rud. 2020. No. 3. pp. 14–18.
6. Algebraistova N. K., Samorodskiy P. N., Kolotushkin D. M., Prokopyev I. V. Technology of gold recovery from gold-bearing technogenic raw materials. Obogashchenie Rud. 2018. No. 1. pp. 33–37.
7. O'Connor C. T., Dunne R. C. The flotation of gold bearing ores — A review. Minerals Engineering. 1994. Vol. 7, Iss. 7. pp. 839–849.
8. Evdokimov S. I., Golikov N. S., Zadkov D. A., Voitovich E. V., Kondratiev V. V., Petrovskiy A. A., Konyukhov V. Y., Gladkikh V. A. Studying the flotation of goldbearing ores using carrier minerals. Minerals. 2024. Vol. 14. DOI: 10.3390/min14010088.
9. Bulatovic S. M. Flotation behaviour of gold during processing of porphyry copper-gold ores and refractory gold-bearing sulphides. Minerals Engineering. 1997. Vol. 10. pp. 895–908.
10. Huang Z.-J., Sun W., Gao Z.-Y. Effects of grinding on mineral surface properties and flotation behaviors. Chinese Journal of Nonferrous Metals. 2019. No. 29. pp. 2671–2680.
11. Acarkan N. The effect of collector’s type on gold and silver flotation in a complex ore. Separation Science and Technology. 2010. Vol. 46. pp. 283–289.
12. Bas A. D., Larachi F. The effect of flotation collectors on the electrochemical dissolution of gold during cyanidation. Minerals Engineering. 2019. Vol. 130. pp. 48–56.
13. Barmenshinova M. B., Motovilov I. Yu., Telkov Sh. A., Omar R. S. Study of the material composition of refractory gold-bearing ore from the Aktobe deposit. Complex Use of Mineral Resources. 2024. No. 4. pp. 5–11.
14. Barmenshinova M. B., Motovilov I. Yu., Omar R. S., Fedorov E. V. Study of gravity pretreatment of refractory gold-bearing ore from Aktobe deposit. Eurasian Mining. 2024. No. 1. pp. 11–14.
15. Wang X., Qin W., Jiao F., Yang C., Cui Y., Li W., Zhang Z., Song H. Mineralogy and pretreatment of a refractory gold deposit in Zambia. Minerals. 2019. Vol. 9. DOI: 10.3390/min9070406
16. Han S., Jung M., Lee W. et al. Diagnosis and optimization of gold ore flotation circuit via linear circuit analysis and mass balance simulation. Minerals. 2021. Vol. 11, Iss. 10. DOI: 10.3390/min11101065
17. Fedotov P. K., Senchenko A. E., Fedotov K. V., Burdonov A. E. Analysis of industrial studies of gold ores of a Chukotka deposit. Obogashchenie Rud. 2018. No. 2. pp. 23–29.
18. Fedotov P. K., Senchenko A. E., Fedotov K. V., Burdonov A. E., Vlasova V. V. Technology for processing lowsulfide gold-quartz ore. Izvestiya Tomskogo Politekhnicheskogo Universiteta. Inzhiniring Georesursov. 2022. Vol. 333, No. 6. рр.178–189.