2018-Sustainable Industrial Processing Summit
SIPS2018 Volume 7. Non-ferrous / Mineral Processing / Environmental Protection

Editors:F. Kongoli, Z. Wang, T. Okura, E. Souza, A. C. Silva
Publisher:Flogen Star OUTREACH
Publication Year:2018
Pages:256 pages
ISBN:978-1-987820-94-2
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)
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    Pyrometallurgical Recovery of Gold From Refractory Gold Ledge Ores

    Sultanbek Kozhakhmetov1; Sergey Kvyatkovskiy1; Ruslan Seisembayev1; Anastasiya Semenova1;
    1INSTITUTE OF METALLURGY AND ORE BENEFICATION, Almaty, Kazakhstan;
    Type of Paper: Regular
    Id Paper: 84
    Topic: 6

    Abstract:

    The problem concerning effective processing of gold ledge ores extremely refractory to loosening has been considered. [1]. Among gold ledge ores in Central Kazakhstan, ores from the Sayak-4 gold-arsenic-cobalt deposit discovered in 1950s have not been processed until the present as they are extremely refractory to loosening and beneficiation. [2, 3]. This papers is devoted to experimental study of the Reducing Pyrometallurgical Selection (RPS process) of refractory gold-arsenic-cobalt ledge ores from the Sayak-4 (Gold) deposit, under the conditions of concentrating gold in mattes and reduction melting with the recovery of precious metals into collecting iron-copper alloys [4]. Scaled-up tests were carried out using the Sayak-4 ores containing, %: Au - 3.5 g/t; Ag - 1.76 g/t; Fe - 3.95; Cu - 0.01; C - 1.93; S - 1.0; As - 3.3; Co - 0.05; SiO2 - 38.30; CaO - 23.6; Al2O3 - 4.56; MgO - 0.73. During experiments of gold collecting in mattes has shown the possibility to obtain slags containing Au - 0.1 g/t and Ag - 2.0-2.16 g/t. Reduction melting with additional charging of iron oxide, copper oxide and coke to the ore shows the possibility to obtain collecting iron-copper alloys containing Au - 7.5-8.14 g/t and Ag - 2.09-3.87 g/t. The obtained slags contained 0.38-0.50 g/t of Au and 0.2-3.2 g/t of Ag. Direct recovery of gold into collecting mattes reached 97%, and into metal alloy - 90.9%.

    Keywords:

    Refractory gold ore; Reduction smelting; Flux; Coke; Slag; Matte; Iron and copper alloys; Gold recovery;

    References:

    [1] Zakharov V. A., Meretukov M. A. Gold: Refractory Ores. Moscow : "Ore and Metals" Publishing House (2013) 456. <br />[2] Naumov E. A., Kalinin Yu. A., Kovalev K. R., Borisenko A. S. Eastern Kazakhstan gold ore deposits in carbonaceous terrigenous-carbonate complexes and their isotropic-geochronological characteristics. Materials of International Symposium. "Huge gold deposits of Central Asia: Strengthening of Kazakhstan gold ore potential". Almaty, 13-14 March (2014) 123-126.<br />[3] Antonov Yu. A. Bakyrchik deposit and its reserve increase perspectives. Materials of International Symposium. "Huge gold deposits of Central Asia: Strengthening of Kazakhstan gold ore potential". Almaty (2014) 56-60.<br />[4] Kozhakhmetov S. M., Bekturganov N. S., Kvyatkovskiy S. A., Dzhumabaeva Z. Sh., Esetov U. E. Refractory gold ore pyrometallurgical selection technology development on Sayak-4 deposit's example with gold to matte recovery. Materials of International Symposium. "Huge gold deposits of Central Asia: Strengthening of Kazakhstan gold ore potential". Almaty, (2014) 182-184.

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    Cite this article as:

    Kozhakhmetov S, Kvyatkovskiy S, Seisembayev R, Semenova A. (2018). Pyrometallurgical Recovery of Gold From Refractory Gold Ledge Ores. In F. Kongoli, Z. Wang, T. Okura, E. Souza, A. C. Silva (Eds.), Sustainable Industrial Processing Summit SIPS2018 Volume 7. Non-ferrous / Mineral Processing / Environmental Protection (pp. 129-134). Montreal, Canada: FLOGEN Star Outreach