Reducing Pyrometallurgical Selection of Particularly Refractory Ledge Gold Ore

  • S. M. Kozhakhmetov Institute Metallurgy and Ore Benefication JSC, 29/133, Shevchenko St.,050010, Almaty, Kazakhstan
  • S. A. Kvyatkovskiy Institute Metallurgy and Ore Benefication JSC, 29/133, Shevchenko St.,050010, Almaty, Kazakhstan

Abstract

The article is devoted to development of a brand new approach to solution of the issue related to development of efficient technologies aimed at processing of especially refractory and hard to concentrate ledge gold ore types. A new technology of such gold ore Reducing Pyrometallurgical Selection (RPS Process) utilising the direct smelting process avoiding its concentration has been developed for the purpose. Utilisation of high temperatures and liquid phase melting processes allows actually complete processing of refractory gold ores irrespective of the mostly complex resistance to processing types and with simultaneous and efficient performance of the following four process operations: a complete removal of any waste rock in the form of melted slag containing gold not exceeding 0.1‒0.3 g/t; a complete transfer into the gas phase and removal of arsenic and other harmful admixtures with off gases; complete combustion of all the ore carbon containing matter types obtaining additional heat for smelting and reducing gas phase; an actually complete transfer of any precious metals into a sulphide melt, collector matte, with gold recovery of 95‒99%, which yield will amount about 10% of the ledge gold ore weight. Thus, the developed technology ensures a ten-fold decrease of processed ore amounts in the process head. The RPS Process has been developed and tested in laboratories and under workshop conditions on the basis of direct electric smelting of hard to concentrate and refractory ledge gold ore from a number of deposits of Southern, Central and Eastern Kazakhstan. Such tests of the RPS Process revealed the possibility to increase throughout gold recovery by 10‒15% as compared with currently achieved in dices in case of especially refractory ledge ore processing.

References

[1]. Huge gold deposits of Central Asia. Strengthening of Kazakhstan gold ore potential, Materials of International Symposium. Almaty, 2014. – 200 p. (in Russian).

[2]. V.A. Narseev, U.V. Gostev, A.V. Zakharov, D.M. Kozlyannikov D.M., V.N. Matvienko, V.A. Favorov, N.M. Frankovskya N.M., V.A. Shiganov. Bakyrchik (geologija, geohimija, orudenenie) [Bakyrchik (geology, geochemistry, mineralization)]. – M.: CSRMI, 2001. – 174 p. (in Russian).

[3]. L.G. Marchenko. Mikro-nanomineralogija zolota i platinoidov v chernyh slancah [Micro-nanomineralogy of gold and platinoids in black shales]. – Almaty: Interpress, 2010. – 146 p. (in Russian).

[4]. S.V. Balikov, V.E. Dementiev, G.G. Mineev. Plavka zolotosoderzhashhih koncentratov [Gold containing concentrates roasting]. – Irkutsk: «Irgiredmet» JSC, 2002. – 415 p. (in Russian).

[5]. V.A. Zakharov, M.А. Meretukov. Zoloto: Ogneupornye rudy [Gold: Refractory Ores]. – Moscow.: Ore and Metals, 2013. – 456 p. (in Russian).

[6]. G.M. Mudd, Resource Consumption Intensity and the Sustainability of Gold Mining // Proc. “2nd International Conference on Sustainability Engineering and Science: Talking and Walking Sustainability”. – Auckland, New Zealand, 2007.

[7]. S.М. Kozhakhmetov. Novye jeffektivnye processy v pirometallurgii medi, nikelja i zolota [New efficient processes in pyrometallurgy of copper, nickel and gold]. – Almaty, 2015. – 406 p. (in Russian).

[8]. Patent 25568 RK. Method of Arsenic Gold Material Processing / S.М. Kozhakhmetov, N.S. Bekturganov, S.A. Kvyatkovskiy; published on 15.03.2012, Bul. No. 3. (in Russian).

[9]. Patent 13914 RK. Polymetal ore leaching method and mechanism for it / A.R. Kosmukhambetov; published on 15.01.2004, Bul. No. 1. (in Russian).

[10]. Patent 2245378 RF. Polymetal ore leaching method and mechanism for it / A.R. Kosmukhambetov; published on 07.02.2005, Bul. No. 2. (in Russian).

[11]. A.S. Semenova, S.M. Kozhakhmetov, S.A. Kvyatkovskiy, L.P. Kim, R.S. Sejsembaev, Kompleksnoe ispol'zovanie mineral'nogo syr'ja [Complex Use of Mineral Resources]. 4 (2016) 35–38 (in Russian).

[12]. Process Romelt [The Romelt process] / Edited by V.А. Roments. – Moscow: Ore and Metals, 2005. – 400 p. (in Russian).

[13]. J.F. Stenebraten, W.P. Johnson, D.R. Brosnahan, Miner. Metall. Process 16 (3) (1999) 37–43.

[14]. J.F. Stenebraten, W.P. Johnson, J. Mcmullen, Miner. Metall. Process 17 (1) (2000) 7–15.

[15]. M.A. Meretukov, Gold Ore Deposits with Active Carbonaceous Matter. Tsvetnye Metally [Non-ferrous metals] 11 (2010) 37–40 (in Russian).
Published
2017-01-25
How to Cite
[1]
S. Kozhakhmetov and S. Kvyatkovskiy, “Reducing Pyrometallurgical Selection of Particularly Refractory Ledge Gold Ore”, Eurasian Chem. Tech. J., vol. 19, no. 1, pp. 71-80, Jan. 2017.
Section
Articles