Basic principles of high-speed activated heap gold leaching

Heap gold leaching in Russia is implemented by the classical technology including milling, nodulizing, preparation of cyanide solution, sprinkling, sorption–desorption, electrolysis and melting into bars. The classical heap gold leaching scenario is suitable for processing of low-grade oxidized gold-bearing raw material with free gold content up to 50 % and more. Currently percentage of low-grade gold deposits is small. Northern ore minerals occur at a depth more than 50 m below surface and are rebellious as a rule, due to slight oxidation of sulfide minerals and owing to fine gold impregnated in bed rocks. The cost of rebellious gold recovery has increased while its extractability has dropped. Nonetheless, heap gold leaching yet remains the prime method to process low-grade goldbearing quartz ore. This is contributed to by the jump of gold prices. Aimed to enhance processing efficiency of rebellious low-grade gold-bearing quartz ore, the high-speed activated heap gold leaching mode is developed. This article offers a brief description of the basic principles of high-speed activated heap leaching of gold from rebellious minerals. The proposed heap gold leaching method can compete with the methods of autoclave and bacterial leaching, and with the method including super fine milling. Feasibility of effective gold recovery is proved in terms of high-speed activated heap leaching of gold from baked tailings of lead flotation.

Keywords: gold, ore grindability, oxygen saturation, piston sprinkling, high-speed heap leaching, electro-photo-activation, activated heap leaching, super fine milling, baking of sulfide flotation tailings, gold recovery.
For citation:

Rubtsov Yu. I., Avdeev P. A., Cherkasov V. G., Lavrov A. Yu. basic principles of high-speed activated heap gold leaching. MIAB. Mining Inf. Anal. Bull. 2021;(3-1):88—98. [In Russ]. DOI: 10.25018/0236_1493_2021_31_0_88.

Acknowledgements:
Issue number: 3
Year: 2021
Page number: 88-98
ISBN: 0236-1493
UDK: 553.411:622 (571.55)
DOI: 10.25018/0236_1493_2021_31_0_88
Article receipt date: 19.10.2020
Date of review receipt: 22.01.2021
Date of the editorial board′s decision on the article′s publishing: 10.02.2021
About authors:

Rubtsov Yu.I.1,2, Dr. Sci. (Eng.), Professor of the Department of water management, environmental and industrial safety, jri.rubtsow@yandex.ru;
Avdeev P. A.2, Dr. Sci. (Eng.), Professor, chita-arb@yandex.ru;
Cherkasov V. G., Dr. Sci. (Eng.), Professor, cherkasov1948@yandex.ru;
Lavrov A. Yu.2, Cand. Sci. (Eng.), Professor.
1 Chita branch of the IGD SB RAS, Chita, Russia;
2 Zabaikalsky state University, Chita, Russia.

 

For contacts:
Bibliography:

1. Plaksin I. N. Gidrometallurgiya [Hydrometallurgy]. Moscow: Nauka, 1972. 278 p. [In Russ]

2. Sekisov A. G., Lavrov A. Yu., Rasskazova A. V. Fotohimicheskie i elektrohimicheskie processy v geotekhnologii [Photochemical and electrochemical processes in Geotechnology]. Zabajkal’skij gosudarstvennyj un-t Chita: ZabGU, 2018. 306 p. [In Russ]

3. Sekisov A. Cluster chemical reactions at mineral-liquid interface in metal leaching by photo-electroactive water-and-gas emulsions. IOP Conference Series: Earth and Environmental Science, 2017, no. 53, pp. 1—4.

4. Petersen J. Heap leaching as a key technology for recovery of values from low-grade ores a brief overview. Hydrometallurgy. 2015. DOI: 10.1016/j.hydromet.2015.09.001.

5. Gurin K. K., Bashlykova T. V., Anan’ev P. P., Boboev I. R., Gorbunov E. P. Extraction of gold from tailings gold processing plant from processing refractory ore of mixed type. Cvetnye metally. 2013. no. 5. pp. 39–44. [In Russ]

6. Shumilova L. V. Gravitational-electrochemical method for extracting gold from technogenic placers. MIAB. Mining Inf. Anal. Bull. 2015. no. 5 (special’nyj vypusk 19). pp. 186—192. [In Russ]

7. Arens V. Zh., Shumilova L. V., Fazlullin M. I., Chkheyan G. H. Perspective directions of chemical and microbiological processing of mineral raw materials of non-ferrous and noble metals. Metallurg. 2017. no. 9. pp. 82—89. [In Russ]

8. Zaharov B. A., Shneerson Ya. M., Chugaev A. V. i dr. Development of technology for autoclave processing of concentrates and industrial products of the Olympiadnensky GOK of Polyus CJSC. Zoloto i tekhnologii. 2013. no. 3. pp. 24—28. [In Russ]

9. Mihajlov B. K., Sedel’nikova G. V., Benevol’skij B. I., Romanchuk A. I. Innovative technologies for processing persistent and poor gold ores as a basis for rational subsoil use. Rudy i metally. 2014. no. 1. pp. 5—8. [In Russ]

10. Mazmanyan G. A., Bragin V. I. Povyshenie izvlecheniya metalla iz osobo upornyh zolotosul’fidnyh rud. Innovacionnye processy kompleksnoj i glubokoj Pererabotki mineral’nogo syr’ya [The increase in the extraction of metals from a particularly persistent gold-sulfide ores. Innovative processes complex and deep processings mineral raw material]. Tomsk, 16—19 sentyabrya 2013 g. [In Russ]

11. Bobadilla-Fazzini R., Perez A. G., Gautier V., Jordan H., Parada P. Hydrometallurgy, 2017, vol. 168.

12. Shumilova L. V., Hat’kova A. N., Myazin V. P., Leskov A. S. Year-Round heap leaching of noble metals in cryolithic zone. Metallurg. 2020 no.10. pp. 57—65. [In Russ]

13. Aksenov A. V., Vasil’ev A. A., Ohotin V. N., Shvec A. A. Application of ultra-fine grinding in the processing of mineral raw materials. Izvestiya vuzov. Cvetnaya metallurgiya. 2014;(2): pp. 20—25. [In Russ]

14 Komogorcev B. V., Varenichev A. A., Problema pererabotki bednyh i upornyh zolotosoderzhashchih rud [Problem of processing poor and persistent gold-bearing ores]. MIAB. Mining Inf. Anal. Bull. 2016. no. 2. pp. 204—218. [In Russ]

15. Chanturiya, V. A., Kozlov, A. P., Chekushina, T. V. Sovremennye problemy kompleksnoj pererabotki trudnoobogatimyh rud i tekhnogennogo syr’ya (Plaksinskie chteniya 2017) [Modern problems of complex processing of hard-to-enrich ores and technogenic raw materials (Plaksin readings-2017)]. Materialy Mezhdunarodnoj nauchnoj konferencii Krasnoyarsk, 12—15 sentyabrya 2017 g. pp. 255—258. [In Russ]

16. Patent RF no. 2721107. 2020—05—15. Elektrolizer. Morozov Yu. P., Chanturiya V. A., Apakashev R.A, Evgrafova E. L., Shevchenko A. S. [In Russ]

17. Shumilova L. V. Sposob intensifikacii kuchnogo vyshchelachivaniya zolota s ispol’zovaniem reagentnogo kompleksa, vklyuchayushchego perekis’ vodoroda [Method for intensifying heap leaching of gold using a reagent complex including hydrogen peroxide]. Moskva, Metallurg. 2020 no.7. pp. 60—69. [In Russ]

18. Isarain-Chavez, E., Cabot, P. L., Centrellas, F., Rodriguez, R. M., Arias, C., Garrido, J. A. ElectroFenton and photoelectro-Fenton degradations of the drug beta-blocker propranolol using a Pt anode: identification and evolution of oxidation products. Journal of Hazardous Materials, 2011, 185, 1228—1235. [In Russ]

Подписка на рассылку

Раз в месяц Вы будете получать информацию о новом номере журнала, новых книгах издательства, а также о конференциях, форумах и других профессиональных мероприятиях.