Hong Qin, Xue-yi Guo, Qing-hua Tian, and Lei Zhang, Recovery of gold from refractory gold ores: Effect of pyrite on the stability of the thiourea leaching system, Int. J. Miner. Metall. Mater. https://doi.org/10.1007/s12613-020-2142-9
Cite this article as:
Hong Qin, Xue-yi Guo, Qing-hua Tian, and Lei Zhang, Recovery of gold from refractory gold ores: Effect of pyrite on the stability of the thiourea leaching system, Int. J. Miner. Metall. Mater. https://doi.org/10.1007/s12613-020-2142-9
Research Article

Recovery of gold from refractory gold ores: Effect of pyrite on the stability of the thiourea leaching system

+ Author Affiliations
  • Corresponding authors:

    Xue-yi Guo    E-mail: xyguo@csu.edu.cn

    Qing-hua Tian    E-mail: qinghua@csu.edu.cn

  • Received: 28 May 2020Revised: 4 July 2020Accepted: 9 July 2020Available online: 12 July 2020
  • The extraction of gold from refractory gold ores (RGOs) without side reactions is an extremely promising endeavor. However, most RGOs contain large amounts of sulfide, such as pyrite. Thus, investigation of the influence of sulfide on the gold leaching process is important to maximize the utilization of RGOs. In this work, the effects of pyrite on the stability of the thiourea system were systematically investigated under different conditions. Results showed that the decomposition rate of thiourea was accelerated sharply in the presence of pyrite. The effect of pyrite on gold recovery in thiourea leaching systems was then confirmed via a series of experiments. The decomposition efficiency of thiourea decreased by 40% and the recovery efficiency of gold increased by 56% after the removal of sulfide by roasting. Under optimal conditions, the efficiency of the gold recovery system increased to 83.69% and only 57.92% of thiourea decomposition was observed. The high consumption of thiourea by the leaching system may be attributed to not only adsorption by mineral particles but also catalytic decomposition by some impurities in the ores, such as pyrite and soluble ferric oxide.
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  • [1]
    F. Burat, H. Baştürkcü, and M. Özer, Gold&silver recovery from jewelry waste with combination of physical and physicochemical methods, Waste Manage., 89(2019), p. 10. doi: 10.1016/j.wasman.2019.03.062
    K. Deng, P. Yin, X.G. Liu, Q.H. Tang, and R.J. Qu, Modeling, analysis and optimization of adsorption parameters of Au(III) using low-cost agricultural residuals buckwheat hulls, J. Ind. Eng. Chem., 20(2014), No. 4, p. 2428. doi: 10.1016/j.jiec.2013.10.023
    K.T. Konadu, R.J. Huddy, S.T.L. Harrison, K. Osseo-Asare, and K. Sasaki, Sequential pretreatment of double refractory gold ore (DRGO) with a thermophilic iron oxidizing archeaon and fungal crude enzymes, Miner. Eng., 138(2019), p. 86. doi: 10.1016/j.mineng.2019.04.043
    C. Ince, Reusing gold-mine tailings in cement mortars: Mechanical properties and socio-economic developments for the Lefke-Xeros area of Cyprus, J. Cleaner Prod., 238(2019), art. No. 117871. doi: 10.1016/j.jclepro.2019.117871
    İ. Alp, O. Celep, D. Paktunç, and Y. Thibault, Influence of potassium hydroxide pretreatment on the extraction of gold and silver from a refractory ore, Hydrometallurgy, 146(2014), p. 64. doi: 10.1016/j.hydromet.2014.03.007
    Q. Wang, X.Z. Hu, F.T. Zi, X.C. Qin, Y.H. Nie, and Y. Zhang, Extraction of gold from refractory gold ore using bromate and ferric chloride solution, Miner. Eng., 136(2019), p. 89. doi: 10.1016/j.mineng.2019.02.037
    O. Sitando, G. Senanayake, X. Dai, A.N. Nikoloski, and P. Breuer, A review of factors affecting gold leaching in non-ammoniacal thiosulfate solutions including degradation and in-situ generation of thiosulfate, Hydrometallurgy, 178(2018), p. 151. doi: 10.1016/j.hydromet.2018.02.016
    S. Zheng, Y.Y. Wang, and L.Y. Chai, Research status and prospect of gold leaching in alkaline thiourea solution, Miner. Eng., 19(2006), No. 13, p. 1301. doi: 10.1016/j.mineng.2005.12.009
    R. Ahtiainen and M. Lundström, Cyanide-free gold leaching in exceptionally mild chloride solutions, J. Cleaner Prod., 234(2019), p. 9. doi: 10.1016/j.jclepro.2019.06.197
    C.B. Sun, X.L. Zhang, J. Kou, and Y. Xing, A review of gold extraction using noncyanide lixiviants: Fundamentals, advancements, and challenges toward alkaline sulfur-containing leaching agents, Int. J. Miner. Metall. Mater., 27(2020), No. 4, p. 417. doi: 10.1007/s12613-019-1955-x
    L. Tremblay, G. Deschênes, E. Ghali, J. McMullen, and M. Lanouette, Gold recovery from a sulphide bearing gold ore by percolation leaching with thiourea, Int. J. Miner. Prcoess., 48(1996), No. 3-4, p. 225. doi: 10.1016/S0301-7516(96)00029-4
    I.N. Rizki, Y. Tanaka, and N. Okibe, Thiourea bioleaching for gold recycling from e-waste, Waste Manage., 84(2019), p. 158. doi: 10.1016/j.wasman.2018.11.021
    C.J. Ma, J.Y. Li, and R.J. Liu, A review of thiocyanate hydrometallurgy for the recovery of gold, Appl. Mech. Mater., 768(2015), p. 53. doi: 10.4028/www.scientific.net/AMM.768.53
    M.G. Aylmore and D.M. Muir, Thiosulfate leaching of gold—A review, Miner. Eng., 14(2001), No. 2, p. 135. doi: 10.1016/S0892-6875(00)00172-2
    R. Ahtiainen, M. Lundström, and J. Liipo, Preg-robbing verification and prevention in gold chloride–bromide leaching, Miner. Eng., 128(2018), p. 153. doi: 10.1016/j.mineng.2018.08.037
    H.X. Wang, C.B. Sun, S.Y. Li, P.F. Fu, Y.G. Song, L. Li, and W.Q. Xie, Study on gold concentrate leaching by iodine–iodide, Int. J. Miner. Metall. Mater., 20(2013), No. 4, p. 323. doi: 10.1007/s12613-013-0730-7
    S.S. Konyratbekova, A. Baikonurova, G.A. Ussoltseva, C. Erust, and A. Akcil, Thermodynamic and kinetic of iodine–iodide leaching in gold hydrometallurgy, Trans. Nonferrous Met. Soc. China, 25(2015), No. 11, p. 3774. doi: 10.1016/S1003-6326(15)63980-2
    Y.J. Guo, X. Guo, H.Y. Wu, S.P. Li, G.H. Wang, X.X. Liu, G.Z. Qiu, and D.Z. Wang, A novel bio-oxidation and two-step thiourea leaching method applied to a refractory gold concentrate, Hydrometallurgy, 171(2017), p. 213. doi: 10.1016/j.hydromet.2017.05.023
    S. Ubaldini, P. Fornari, R. Massidda, and C. Abbruzzese, An innovative thiourea gold leaching process, Hydrometallurgy, 48(1998), No. 1, p. 113. doi: 10.1016/S0304-386X(97)00076-5
    M. Tanrıverdi, H. Mordoğan, and Ü. İpekoğlu, Leaching of Ovacık gold ore with cyanide, thiourea and thiosulphate, Miner. Eng., 18(2005), No. 3, p. 363. doi: 10.1016/j.mineng.2004.06.012
    J.S. Li and J.D. Miller, A review of gold leaching in acid thiourea solutions, Miner. Process. Extr. Metall. Rev., 27(2006), No. 3, p. 177. doi: 10.1080/08827500500339315
    J.B. Hiskey, Thiourea leaching of gold and silver — Technology update and additional applications, Min. Metall. Explor., 1(1984), No. 3, p. 173.
    Y.H. Hu, G.F. Guo, and G.Z. Qiu, Study on mechanism of gold leaching by thiourea in the presence of sodium sulphite, J. Cent. South Univ. Technol., 7(2000), No. 3, p. 113. doi: 10.1007/s11771-000-0016-x
    S. Ardiwilaga, Effects of cysteine and oxygen on recovery of cemented gold from leach liquors in a thiourea system, Miner. Eng., 12(1999), No. 6, p. 645. doi: 10.1016/S0892-6875(99)00049-7
    T.L. Deng, M.X. Liao, M.H. Wang, Y.-W. Chen, and N. Belzile, Enhancement of gold extraction from biooxidation residues using an acidic sodium sulphite–thiourea system, Miner. Eng., 14(2001), No. 2, p. 263. doi: 10.1016/S0892-6875(00)00181-3
    X.B. Qiu., J.K. Wen, S.T. Huang, H.Y. Yang, M.L. Liu, and B. Wu, New insights into the extraction of invisible gold in a low-grade high-sulfur Carlin-type gold concentrate by bio-pretreatment, Int. J. Miner. Metall. Mater., 24(2017), No. 10, p. 1104. doi: 10.1007/s12613-017-1501-7
    L.K. Fu, L.B. Zhang, S.X. Wang, W. Cui, and J.H. Peng, Synergistic extraction of gold from the refractory gold ore via ultrasound and chlorination–oxidation, Ultrason. Sonochem., 37(2017), p. 471. doi: 10.1016/j.ultsonch.2017.02.008
    I. Guzman, S.J. Thorpe, and V.G. Papangelakis, Redox potential measurement during pressure oxidation (POX) of a refractory gold ore, Can. Metall. Q., 57(2018), No. 4, p. 382. doi: 10.1080/00084433.2017.1386363
    C.A. Fleming, Basic iron sulfate — A potential killer in the processing of refractory gold concentrates by pressure oxidation, Min. Metall. Explor., 27(2010), No. 2, p. 81.
    Z.L. Liu, Z.L. Li, X.F. Xie, S. Yang, J.C. Fei, Y.H. Li, Z.F. Xu, and H. Liu, Development of recyclable iron sulfide/selenide microparticles with high performance for elemental mercury capture from smelting flue gas over a wide temperature range, Environ. Sci. Technol., 54(2020), No. 1, p. 604.
    Q. Li, F.Z. Ji, B. Xu, J.J. Hu, Y.B. Yang, and T. Jiang, Consolidation mechanism of gold concentrates containing sulfur and carbon during oxygen-enriched air roasting, Int. J. Miner. Metall. Mater., 24(2017), No. 4, p. 386. doi: 10.1007/s12613-017-1418-1
    A. Yörükoğlu, A. Obut, and İ. Girgin, Effect of thiourea on sulphuric acid leaching of bastnaesite, Hydrometallurgy, 68(2003), No. 1-3, p. 195. doi: 10.1016/S0304-386X(02)00199-8
    H. Celik, Extraction of gold and silver from a Turkish gold ore through thiourea leaching, Min. Metall. Explor., 21(2004), No. 3, p. 144.
    J.S. Li and J.D. Miller, Reaction kinetics of gold dissolution in acid thiourea solution using ferric sulfate as oxidant, Hydrometallurgy, 89(2007), No. 3-4, p. 279. doi: 10.1016/j.hydromet.2007.07.015
    H. Zhou, Y.S. Song, W.J. Li, and K. Song, Electrochemical behavior of gold and its associated minerals in alkaline thiourea solutions, Int. J. Miner. Metall. Mater., 25(2018), No. 7, p. 737. doi: 10.1007/s12613-018-1621-8
    G.S. Pokrovski, J. Schott, F. Farges, and J.-L. Hazemann, Iron(III)–silica interactions in aqueous solution: Insights from X-ray absorption fine structure spectroscopy, Geochim. Cosmochim. Acta, 67(2003), No. 19, p. 3559. doi: 10.1016/S0016-7037(03)00160-1
    D.W. Barnum, Potential-pH diagrams, J. Chem. Educ., 59(1982), No. 10, p. 809. doi: 10.1021/ed059p809
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