Almalyk Branch of Tashkent State Technical University (Almalyk, Uzbekistan):

Samadov A. U., Director, Doctor of Engineering Sciences, Professor, alishersamadov@yandex.com

Institute of Mineral Resources (Tashkent, Uzbekistan):

Khamidullaev B. N., Head of the Center, PhD in Engineering Sciences, baxrom_0786@mail.ru
Almatov I. M., Senior Researcher, PhD in Engineering Sciences, ilkhom90@list.ru
Normurodov A. A., Junior Researcher, azizbek19922304@mail.ru

This work covers one of the urgent problems in mining and metals, namely, material composition analysis and gold-bearing ore process design. The objective of this research was to conduct laboratory studies in order to develop a processing technology and assess the resulting process recovery of gold and silver for ore samples obtained at the North-Western block of the Kyzylalmasai ore field. The material composition for the ore samples was studied using spectral, chemical, and rational gold and silver assays, optical emission analysis, and other methods and is represented by quartz, pyrite, and chalcopyrite. The chemical assay results for the ore studied have demonstrated the following average grades for the sample: 4.11 g/t of gold and 31.52 g/t of silver. Gravity concentration, flotation, direct and sorption cyanidation were analyzed as potential processing methods. The resulting process, that has been developed and recommended for processing the gold-bearing ore studied, yielded a gravity concentrate containing 66.28 g/t of gold and 468.98 g/t of silver with metal recoveries of 43.22 and 39.88 %, respectively. Flotation of the gravity tailings yielded a flotation concentrate containing 33.36 g/t of gold and 235.22 g/t of silver with a gold recovery of 47.97 % and a silver recovery of 46.92 % of the ore. The total recovery into the combined concentrate was 91.19 % for gold and 86.79 % for silver. The resulting concentrate grades meet the specifications for copper smelter feed.

1. Bekpulatov Zh. M., Khudaiberdiev F. T. Study of the material composition and development of technology for processing gold-bearing ore samples from one of the deposits of the Republic of Uzbekistan. Innovatsionnaya Nauka. 2017. No. 04-3. pp. 20–22.
2. Keith W. T., Stewart D. R., Alessandro C. The impact of artisanal gold mining, ore processing and mineralization on water quality in Marmato, Colombia. Environmental Geochemistry and Health. 2021. Vol. 43. pp. 4265–4282.
3. Said I., Rahmawati S., Ningsih P., Astuti. Description of the composition of gold to silver minerals in the rock containing gold. Journal of Physics: Conference Series. 2021. Vol. 1832. DOI: 10.1088/1742-6596/1832/1/012007
4. Artyukh T., Kupalova G., Bazylevych V., Hryhorenko I., Ternova A. Improving a procedure for determining the assay of gold in a precious alloy of different composition using a touchstone. Eastern-European Journal of Enterprise Technologies. 2019. Vol. 2, No. 12. pp. 6–19.
5. Fajstavr D., Slepička P., Švorčík V. LIPSS with gold nanoclusters prepared by combination of heat treatment and KrF exposure. Applied Surface Science. 2019. Vol. 465. pp. 919–928.
6. Magomedov D. R., Koizhanova A. K., Erdenova M. B., Abdyldaev N. N. Extraction of gold from sulfide ores and beneficiation concentrates. Otechestvennaya Geologiya. 2019. No. 5. pp. 85–91.
7. Khan M. J., Kumari S., Shameli K., Selamat J., Sazili A. Q. Green synthesis and characterization of pullulan mediated silver nanoparticles through ultraviolet irradiation. Materials. 2019. Vol. 12, Iss. 15. DOI: 10.3390/ma12152382
8. Luchko M. S., Fedotov P. K. Industrial test of the centrifugal jigger for gravity concentration of non-ferrous and precious metal ore. Nauki o Zemle i Nedropolzovanie. 2019. Vol. 42, No. 3. pp. 349–357.
9. Bekpulatov Zh. M., Yakubov M. M., Akhmedov H., Yakubov N. M., Kholikulov D. B. Methods of wastewater treatment during the beneficiation of gold-bearing ores. Kompozitsionnye Materialy. 2020. No. 3. pp. 300–301.
10. Bekpulatov Zh. M., Yakubov M. M., Akhmedov H., Yakubov N. M., Kholikulov D. B. Granulometric characteristics of the original ore of deposits of the Republic of Uzbekistan. Kompozitsionnye Materialy. 2020. No. 3. pp. 301–303.
11. Nosirov N. I., Qosimova M. N., Mustafaev B. N., Suyarov J. U. The study of the material composition of the tails of gold mining factories. International Journal of Advanced Research in Science, Engineering and Technology. 2020. Vol. 7, Iss. 1. pp. 12657–12662.
12. Samadov A. U., Nosirov N. I. Studying the garing content of gold tails. International Journal of Advanced Research in Science, Engineering and Technology. 2019. Vol. 6, Iss. 8. pp. 10607–10613.
13. Rylnikova M. V., Ezhov V. A., Nikiforova I. L., Plotnikov S. N. Energy-efficient technologies of gold ore mining and processing at Svetlinskoe deposit. Gornyi Zhurnal. 2017. No. 9. pp. 35–41.
14. Kovalev V. N., Golikov V. V., Rylov N. V. The Bakyrchikskoye deposit rebellious carbon-bearing gold sulfide ore processing technology analysis and selection. Obogashchenie Rud. 2017. No. 2. pp. 21–26.