Enhancement of metal recovery by activation of leaching solution

Authors: Абен Е. Х., Рустемов С. Т., Бахмагамбетова Г. Б., Ахметханов Д.

The laboratory research findings on the role of cyanide concentration and temperature in mechanical activation of treatment solution are presented in the article. Such activation can expands source of raw materials by means of treatment of ore with low metal content. Mechanical effect is exerted by an activator, which changes the structure and temperature of the treatment solution, which is accompanied by breaking of bonds between atoms and by crystalline lattice destruction. During the laboratory research, dependences of gild content of pregnant solution on cyanide concentration and temperature were obtained for standard technology and with activation. Samples for the research were taken from the Rodnikovoe gold deposit in East Kazakhstan. The deposit is composed of ore of two types: primary gold-bearing quart sulfide ore and oxidized ore with average gold content of 1.44 g/t. It is found that both with the conventional technology and in case of any degree activation, efficient concentration of cyanide for leaching gold from the given deposit ore is 600 ррm. Activation of treatment solution for 5 min and, accordingly, its temperature growth to 26–27ºС increases the gold content of pregnant solution by 22% on average as against the conventional technology; activation for 8 min with temperature growth to 31–32ºС—by 27%. Thus, mechanical activation improves the potency of treatment solution and reduces the time of leaching.

Keywords: Gold, heap leaching, cyanide concentration, mechanical activation, pregnant solution, liquid phase, crystalline structure, steam–gas mixture, radical.
For citation:

Aben E. Kh., Rustemov S. T., Bakhmagambetova G. B., Akhmetkhanov D. Enhancement of metal recovery by activation of leaching solution. MIAB. Mining Inf. Anal. Bull. 2019;(12):169-179. [In Russ]. DOI: 10.25018/0236-1493-2019-12-0-169-179.

Acknowledgements:
Issue number: 12
Year: 2019
Page number: 169-179
ISBN: 0236-1493
UDK: 622.234.42
DOI: 10.25018/0236-1493-2019-12-0-169-179
Article receipt date: 09.07.2019
Date of review receipt: 16.09.2019
Date of the editorial board′s decision on the article′s publishing: 11.11.2019
About authors:

E.Kh. Aben1, Cand. Sci. (Eng.), Senior Lecturer,
e-mail: aek554@mail.ru,
S.T. Rustemov1, Researcher, e-mail: ser_rust@mail.ru,
G.B. Bakhmagambetova1, Lecturer, e-mail: gulnarabb@mail.ru,
D. Akhmetkhanov1, Cand. Sci. (Eng.), Senior Lecturer,
e-mail: dalil-zaisan@mail.ru,
1 Satbayev University, 050013, Almaty, Kazakhstan.

For contacts:

G.B. Bakhmagambetova,
e-mail: gulnarabb@mail.ru.

Bibliography:

1. Makarov A. B. Man-made deposits. Sorosovskiy obrazovatel'nyy zhurnal. 2000. vol. 6, no 8. [In Russ]. http://www.pereplet.ru/nauka/Soros/pdf/0008_076.pdf/
2. Kalybekov T., Rysbekov K., Zhakypbek Y. Efficient land use in open-cut mining. New developments in mining engineering 2015: theoretical and practical solutions of mineral resources mining. London: ImprintCRC Press, 2015, pp. 287—291. DOI: 10.1201/b19901-51.
3. Rysbekov K., Huayang D., Kalybekov T., Sandybekov M., Idrissov K., Zhakypbek Y., Bakhmagambetova G. Application features of the surface laser scanning technology when solving the main tasks of surveying support for reclamation. Mining of Mineral Deposits. 2019;13(3): 40—48. https://doi.org/10.33271/mining13.03.040/
4. Pirsol I. Kavitaciya. Pod red. L. A. Epshteyna [Cavitation. Epshteyn L. A. (Ed.)], Moscow, Mir, 1975, 96 p.
5. Knepp R., Deyli Dzh., Khemmit F. Kavitatsiya [Cavitation], Moscow, Mir, 1974, 678 p.
6. Alekhin A. I., Ivanov M. A. Intensification proposal for heap leaching of gold in the north regions of Russia. Potentsial sovremennoy nauki. 2015, no 3 (11), pp. 73—77. [In Russ]. https://elibrary.ru/item.asp?id=23330462.
7. Yusupov Kh. A., Dzhakupov D. A. Ammonium bifluoride in chemical treatment of boreholes in in-situ uranium leaching. Gornyy zhurnal. 2017, no 4, pp. 57—60. [In Russ].
8. Barchenkov V. V. Intensivnoe tsianirovanie graviokontsentrata na novoy ustanovke SLR kompanii Sepro Mineral Systems [Intensive cyanidation of gravity concentrate on leach reactor SLR of Sepro Mineral Systems], available at: https://zolotodb.ru/article/11435.
9. Boboev F. Sh., Boboev I. R., Strizhko L. S., Ryabova A. V. Improvement of heap gold leaching in rigorous climate. Tsvetnye metally. 2016, no 2, pp. 46—51. [In Russ]. DOI 10.17580/ tsm.2016.02.07, https://www.rudmet.ru/journal/1502/article/25821/?language=en.
10. Kashuba S. G., Leskov M. I. Practice of heap leaching in Russia—Review of experience and analysis of prospects. Zoloto i tekhnologii. 2014, no 1(23), pp. 10—14. [In Russ]. http://www.eruda.ru/news/0200_tekhnika_zolotodobychi_2014_kuchnoe_vyshchelachivanie_v_rossii_obzor_perspektivy_zoloto.htm .
11. Kazanov E. V., Ryumkina R. A. Preparation of ore pile for heap leaching. Materialy tret'ey nauchno-tekhnicheskoy konferentsii Gornogo instituta. Part II. Chita, 2000, pp. 117—119.
12. Burtovoy A. G. Patent RU 2428492, 10.09.2011. https://findpatent.ru/patent/242/2428492.html/
13. Sekisov A. G., Rubtsov Yu. I., Lavrov A. Yu. Activated heap leaching of disperse gold from low-sulfide ore. Zapiski Gornogo instituta. 2016. vol. 217, pp. 96—101. [In Russ].
14. Tyupin V. N. Intensification of heap ore leaching with blast energy. Gornyy zhurnal. 2019, no 8. [In Russ]. DOI: 10.17580/gzh.2019.08.11. https://www.rudmet.ru/journal/1844/article/
31406/
15. Quanyin Tan, Chao Deng, Jinhui Li Innovative application of mechanical activation for rare earth elements recovering: process optimization and mechanism exploration. Scientific Reports. 2016;6. DOI: 10.1038/srep19961, https://www.nature.com/articles/srep19961/
16. Lodeyshchikov V. V. Tekhnologiya izvlecheniya zolota i serebra iz upornykh rud, t. 1 [Technology of gold and silver recovery from rebellious ore, vol. 1], Irkutsk, 1999, 342 p.
17. Wadsworth M. E., Zhu X., Thompson J. S., Pereira C. J. Gold dissolution and activation in cyanide solution: kinetics and mechanism. Hydrometallurgy. 2000;57(1):1—11. DOI: 10.1016/S0304-386X(00)00084-0.
18. Kuchnoe vyshchelachivanie zolota — zarubezhnyy opyt i perspektivy razvitiya. Spravochnik. Pod red. V. V. Karaganova, B. S. Uzhkenova [Heap leaching of gold—Foreign experience and
development prospects. Handbook. Karaganov V. V., Uzhkenov B. S. (Eds.)], Moscow-Almaty, 2002, 288 p.
19. Baláž P. Mechanical activation in hydrometallurgy. International Journal of Mineral Processing. 2003;72(1—4). DOI: 10.1016/S0301-7516(03)00109-1/.

Mining World Russia
Subscribe for our dispatch