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.

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.


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