Study of the process of cyanide leaching of gold using sodium acetate at different ore sizes

Ye. Yessengarayev; B.S. Baimbetov; S.V. Mamyachenkov; B.N. Surimbayev; N.G. Prozor

doi:10.31643/2020/6445.08

Authors

Ye. Yessengarayev Satbayev University, Almaty, Kazakhstan
B.S. Baimbetov Satbayev University, Almaty, Kazakhstan
S.V. Mamyachenkov Ural Federal University named after the first President of Russia B.N. Yeltsin
B.N. Surimbayev State Scientific and Production Association of Industrial Ecology "Kazmekhanobr"
N.G. Prozor Zarkuh mining company

DOI:

https://doi.org/10.31643/2020/6445.08

Keywords:

intensification of the leaching process, sodium acetate, leaching, heap leaching, gold, chemical reagent.

Abstract

Intensification of metal extraction by leaching is a complex of organizational and technical measures aimed at achieving the fastest and complete extraction of metal from ore. Measures to intensify leaching are aimed at completely or partially neutralizing the causes that cause a decrease in the leaching rate. Tests were performed on cyanide leaching of gold from gold-containing ore with the addition of sodium acetate to intensify the leaching process. The results of assay-gravimetric, chemical, mineralogical and granulometric analysis of oxidized ore are presented. According to electron-probe analysis, gold in the ore is present in the form of thin (micron) inclusions in minerals and ore rocks. A study was conducted on leaching of crushed ore with a size of 90% of the class -0.074 mm and crushed ore with a size of -12+0 mm. Leaching of crushed ore with a size of 90% of the class -0.074 mm showed that when adding sodium acetate, the gold recovery rate increases by 1.13 % compared to leaching without adding this reagent. When leaching crushed ore with a size of -12 + 0 mm with the addition of acetate, gold recovery increases by an average of 4 %, and the kinetics of gold dissolution improves. Research data prove that sodium acetate can be used to intensify gold at a ore size of -12+0 mm and in larger ore classes for leaching gold.

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Author Biographies

Ye. Yessengarayev, Satbayev University, Almaty, Kazakhstan

Ph.D., Satbayev University, Almaty, Kazakhstan, Republic of Kazakhstan, Almaty, Laboratory of Precious Metals, State Scientific and Production Association of Industrial Ecology "Kazmekhanobr", Republic of Kazakhstan.

B.S. Baimbetov, Satbayev University, Almaty, Kazakhstan

Cand. those. sciences, ass. prof. Department of Metallurgy and Mineral Processing, Satbayev University, Almaty, Kazakhstan, Almaty, Kazakhstan.

S.V. Mamyachenkov, Ural Federal University named after the first President of Russia B.N. Yeltsin

Doctor of Technical Sciences, Professor, Head of the Department of Metallurgy of Non-Ferrous Metals, Head of the Basic Department of Metallurgy, Ural Federal University named after the first President of Russia B.N. Yeltsin, Russia, 620075, Sverdlovsk region, Yekaterinburg.

B.N. Surimbayev, State Scientific and Production Association of Industrial Ecology "Kazmekhanobr"

Ph.D., Senior Researcher, Laboratory of Precious Metals. State Scientific and Production Association of Industrial Ecology "Kazmekhanobr", Almaty, Kazakhstan.

N.G. Prozor, Zarkuh mining company

Head of the Chemical Analytical Laboratory, Zarkuh mining company, Iran, 1556838111, Tehran, 1 floor, Iran Ertebat Building, No.2, 4th Alley, Shahid Gandhi St., North Sohrevardi Ave

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