UPSI Digital Repository (UDRep)
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UPSI Digital Repository (UDRep)
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| Abstract : Universiti Pendidikan Sultan Idris |
| The focus of this work is to establish a hydrometallurgical technique for efficiently extracting gold from the aggregated gold-rich concentrate produced by a mining facility in one of Kazakhstan's deposits. The leaching techniques applied to gravity-flotation concentrates include hydrometallurgical gold recovery processes using the surfactant sulfanol and the oxidizing reagent trichloroisocyanuric acid (TCCA). The findings indicate the effectiveness of leaching gravity-flotation concentrates with oxidizing (accelerating) reagents. Gold extraction through cyanidation of the blended concentrate, ground to 89–90% passing 10 µm with TCCA, averaged 84.0%, compared to 65.76–67.8% with conventional direct cyanidation. The advantage of employing chlorine-based oxidants, such as TCCA, in hydrometallurgical processing lies in their applicability in both acidic and alkaline environments, whereas other oxidants are constrained by specific technological conditions. Technical trichloroisocyanuric acid (TCCA), a chlorine-containing oxidizer with the formula C3O3N3Cl3, containing 25–30% calcium hypochlorite as an impurity, proved to be the most effective in enhancing gold leaching techniques. Apart from improving the efficiency of the leaching process, the use of TCCA is economically viable. The wholesale cost of technical TCCA is ~ $700 per ton, significantly lower than many other oxidants commonly used in gold hydrometallurgical production. With its higher active chlorine content, TCCA consumption per ton of gold-bearing raw material is nearly half that of hypochlorite or peroxide. Additionally, TCCA use minimizes the formation of unwanted impurities in both the pulp and the productive solution. © The Author(s) 2024. |
| References |
Liu Y, Sun J, Brzozowski MJ, Liu C. Deep epithermal Au mineralization at Tuanjiegou, northeast China. J Geochem Explor. 2024;257: 107364. https:// doi. org/ 10. 1016/j. gexplo. 2023. 107364. Kenzhaliyev B, Koizhanova A, Atanova O, Magomedov D, Nurdin H. Research and development of gold ore processing technology. Kompleksnoe Ispolzovanie Mineralnogo Syra = Complex Use of Mineral Resources. 2024;329(2):63–72. https:// doi. org/ 10. 31643/ 2024/ 6445.17. Elshin VV, Kolodin AA, Ovsyukov AE, Malchikhin AS. Peculiarities of cyanide leaching of gold in the grinding cycle. Metallurgist. 2013;7:86–90. Fazlullin MI. Heap leaching of precious metals. Publishing House of the Academy of Mining Sciences, pp. 496–498, 2001. Ikariya T, Hashiguchi S, Murata K, Noyori R. Preparation of optically active (R,R)-hydrobenzoin from benzoin or benzil. Organ Synthe. 2005. https:// doi. org/ 10. 15227/ orgsyn. 082. 0010. Bogorodsky AV, Balikov SV, Emelyanov YE, Kopylova NV. Autoclave oxidation of sulfide gold-bearing concentrates. Non-Ferr Metall. 2011;4:68–72. Basu N, Maity SK, Chaudhury A, Ghosh R. Trichloroisocyanuric acid (TCCA): an efficient green reagent for activation of thioglycosides toward hydrolysis. Carbohydr Res. 2013;369:10–3. https:// doi. org/ 10. 1016/j. carres. 2013. 01. 001. Kenzhaliyev BK, Tussupbayev NK, Abdykirova GZ, Koizhanova AK, Fischer DY, Baltabekova ZA, Samenova NO. Evaluation of the efficiency of using an oxidizer in the leaching process of gold-containing concentrate. Processes. 2024;12:973. https:// doi. org/ 10. 3390/ pr120 50973. Puvvada GVK, Murthy DSR. Selective precious metals leaching from a chalcopyrite concentrate using chloride/hypochlorite media. Hydrometallurgy. 2000;58:185–91. https:// doi. org/ 10. 1016/ S0304- 386X(00) 00083-9. Nakamoto K. IR and Raman spectra of inorganic and coordination compounds. New York: Wiley; 1999. p. 536. Kharitonov YuA, Evstafieva ON. General theoretical analysis of vibrations of coordinated cyano groups. J Inorg Chem. 1969;3:770–6. Semushkina LV, Narbekova SM. On the possibility of flotation processing of technogenic gold-containing waste from enrichment plants. Challenges Sci. 2021. https:// doi. org/ 10. 31643/ 2021. 06. Kaumetova DS, Koizhanova AK, Toktar G, Magomedov DR, Abdyldaev NN. Study of the finely-dispersed gold recovery parameters, News of the National Academy of Sciences of the Republic of Kazakhstan. Ser Geol Tech Sci. 2022;1:69–75. https:// doi. org/ 10. 32014/ 2022.2518- 170X. 142. |
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