Articles

Increasing gold leaching efficiency with change of solution rheological properties

• 
• 

User Rating:  / 0

PoorBest 

Details

Category: Content №3 2021

Last Updated on 23 June 2021

Published on 30 November -0001

Hits: 4457

Authors:

Kh.A.Yusupov, orcid.org/0000-0002-7682-5207, Satbayev University, Almaty, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

K.B.Rysbekov, orcid.org/0000-0003-3959-550X, Satbayev University, Almaty, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Kh.Kh.Aben, orcid.org/0000-0002-8525-0337, KazMinerals LLP, Almaty, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

G.B.Bakhmagambetova, orcid.org/0000-0001-6666-2195, Satbayev University, Almaty, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2021, (3): 014 - 018

https://doi.org/10.33271/nvngu/2021-3/014

Abstract:

Purpose. Increasing the efficiency of gold heap leaching by changing the solution rheological properties due to its mechanical activation. Semi-industrial tests were carried out to verify the results of laboratory work.

Methodology. First, semi-industrial tests were carried out without activation of the solution (basic technology), and then the solution activation was applied. The ore amount in the stockpile was 600 kg; the gold content in the ore is 1.12 g/t. At the same time, the concentration of cyanide was 400 ppm. The activation degree was from 3 to 8 minutes, the leaching time was 2, 4, 6 hours, the solution temperature varied from 13 to 30 degrees.

Findings. According to the results of semi-industrial tests, the dependence of gold content, pH value, and residual concentration of the reagent on the leaching time was obtained using both proposed technology and the basic one. Comparison of the semi-industrial test results related to the basic technology and proposed one (with the solution activation) showed that the maximum gold content in the productive solution with the basic technology is 1.83 mg/l, and with the activation of the solution it is 2.10 mg/l. Hence, there is an increase in the gold content by 14.7% with the solution activation

Originality. Dependence of gold content in productive solution, pH value, and residual concentration of the reagent in solution on the degree of its activation has been obtained.

Practical value. The optimum degree of the treatment solution activation during gold heap leaching is determined, which is from 5 minutes to 7 minutes depending on the leaching time, which increases the gold content in the solution by 14.7%.

Keywords: gold, heap leaching, cyanide concentration, mechanical activation, productive solution, leaching solution

References.

1. Bocharov, V.A., Ignatkina, V.A., & Kayumov, A.A. (2019). Theory and practice of minerals separation of massive persistent polymetallic ores of non-ferrous metals: monograph. Moscow: Publishing House: Gornaya kniga. ISBN: 978-5-98672-502-4.

2. Bitimbaev, M.Z., Oryngozhin, E.S., Nenashev, N.V., & Musaev,E.L. (2014). Technological operations of gold intensive heap leaching of the Akzhal field. Collection of scientific works of MI named after D.A.Kunaev, 85, 26-29.

3. Yusupov, Kh., Rysbekov, K., & Bakhmagambetova, G. (2020). Engineering of the site for heap leaching of gold. Pridneprovskiy Scientific Bulletin, 41(697), 1-3.

4. Egorova, I.V. (Ed.) (2019). Mining opportunities of subsoil: collective monograph. Moscow: FSBI VIMS. ISBN 978-5-6042742-9-3.

5. Chanturia, V.A., Minenko, V.G., Samusev, A.L., Chanturia, E.L., & Koporulina, E.V. (2017). Mechanism of combined energy effects on intensification of zirconium leaching and rare-earth elements from eudialite concentrate. Mineral enrichment. FTPRPI, (5), 105-112. https://doi.org/10.15372/FTPRPI20170512.

6. Lavrov, A.Y. (2015). Development of physical and chemical geotechnologies based on complex activation of mineral environment and work solution. ZabMU Bulletin, 6(121), 25-36.

7. Kanaev, A.T., Semenchenko, G.V., & Kanaeva, Z.K. (2015). Influence of sodium cyanide concentration on the indication of percolation leaching of gold of the Bakyrchik deposit. International Journal of Applied and Basic Research, 2-2, 224-227.

8. Seredkin, M., Zabolotsky, A., & Jeffress, G. (2016). In situ recovery, an alternative to conventional methods of mining: Exploration, resource estimation, environmental issues, project evaluation and economics. Ore Geology Reviews, 79, 500-514. https://doi.org/10.1016/j.oregeorev.2016.06.016.

9. Balikov, S.V., & Dementyev, V.E. (2015). Gold: Properties. Geochemical aspects: monograph. OJSC Irkutsk Research Institute of Noble and Rare Metals and Diamonds OJSC Irgiredmet. ISBN: 978-5-902324-08-9.

10. Shumilova, L.V. (2016). Preparation of pyrite-arsenopyrite concentrate for gold leaching based on use of polyreagent complexes. Mining sciences and technologies, (1). Enrichment and processing of mineral and technogene raw materials, (pp. 3-12). Retrieved from https://mst.misis.ru/jour/article/viewFile/12/14.

11. Sekisov, A.G., Myazin, V.P., Lavrov, A.Yu., & Goncharov,D.S. (2016). Features of intracrystalline and interfacial diffusion processes in activation leaching of dispersed gold. GIAB, (1), 348-357. Retrieved from https://www.giab-online.ru/files/Data/2016/1/348_357_1_2016.pdf.

12. Lavrov, A.Yu. (2013). Improving the development efficiency of ore deposits based on the use of innovative geotechnologies with photo electrochemical activation of technological schemes components. Bulletin of ZabMU, 02(93), 31-37.

13. Sekisov, A.G., Eremin, A.M., Lavrov, A.Yu., & Konareva, T.G. (2014). Activation leaching of dispersed gold and its stage sorption and electrosorption from ore pulp and productive solutions. Rational development of subsoil, (3), 62-68.

14. Cherevko, S., Zeradjanin, A.R., & Topalov, A.A. (2014). Effect of Temperature on Gold Dissolution in Acidic Media. Journal of the Electrochemical Society, 161(9), H501-H507. https://doi.org/10.1149/2.0551409jes.

15. Sekisov, A.G., Rubtsov, Yu.I., & Lavrov, A.Yu. (2016). Activation heap leaching of dispersed gold from low-sulfide ores. Notes of the Mining Institute, 217, 96-101.

16. Yusupov, Kh.A., Aliyev, S., & Dzhakupov, D.A. (2017). Examination of the ammonium bifluoride use for chemical treatment of wells. Mining Magazine, (4), 57-60. https://doi.org/10.17580/gzh.2017.04.11.

17. Aben, E.Kh., Rustemov, S.T., Bakhmagambetova, G.B., & Akhmetkhanov, D. (2019). Increasing metal extraction based on activation of leaching solution. GIAB, (12), 169-179.

18. Chanturia, V.A., Shadrunova, I.V., Gorlova, O.E., & Kolodezhnaya, E.V. (2020). Development of technological innovations in the deep and complex processing of technogene raw materials in the conditions of new economic challenges. TulSU bulletin. Earth sciences, (1), 159-171.

• < Prev
• Next >