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Year 2025
 
Vol 66, Issue 6, [12 - 2025] - Full papers

Research on the material composition of Ta-Phoi copper tailings and accompanying gold recovery orientation

DOI:10.46326/JMES.2025.66(6).01

  • Affiliations:

    1 Hanoi University of Mining and Geology, Hanoi, Vietnam
    2 Advanced Technologies in Mineral Processing and Recycling (MinPro) Research group, Hanoi University of Mining and Geology, Hanoi, Vietnam

  • *Corresponding:
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  • Received: 2nd-July-2025
  • Revised: 22nd-Oct-2025
  • Accepted: 3rd-Nov-2025
  • Online: 1st-Dec-2025
Pages: 1 - 12
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Abstract:

Every year, the Ta-Phoi copper processing plant disposes of about 970,000 tons of tailings with an Au grade content of approximately 0.1 g/t. In the operating technology, there has not yet been consideration for recovering useful components such as gold. The amount of gold lost annually in tailing products is about 116.4 kg Au. As of 2023, the amount of sludge is 3,531,682 tons (equivalent to 353.2 kg Au). The amount of tailings after the processing is significantly large, and the Au grade content in the tailings is still relatively high. The amount of tailings is currently stored at the tailing pond, if not treated, it will waste resources and cause a risk to environmental pollution. The article presents the results of research on the chemical composition and characteristics of tailings containing Au using sieve analysis, X-ray diffraction (XRD) analysis, inductively coupled plasma mass spectrometry/atomic emission spectrometry (ICP-MS/AES) analysis and scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS). The research results provide a technological direction for Au recovery using gravity separation methods (spiral, shaking table, and jig), centrifugal gravity separation (Knelson, Falcon), and flotation method. To increase the processed Au content, the products should be thoroughly treated through the leaching method using suitable chemical lixiviants to meet the safety and environmental protection requirements, following regulations in Vietnam. This is the first time that there are comprehensive studies on the material composition of copper tailings for the purpose of recovering the tailings bearing gold. The study opens up prospects for the recovery of useful minerals in the tailings of copper beneficiation plants, in particular and the tailings of the mineral processing plants in general.

How to Cite
., H.Thanh Pham, ., D.Kim Thi Nhu and ., N.Thi Pham 2025. Research on the material composition of Ta-Phoi copper tailings and accompanying gold recovery orientation. Journal of Mining and Earth Sciences. 66, 6 (Dec, 2025), 1-12. DOI:https://doi.org/10.46326/JMES.2025.66(6).01.
References

Aksoy, B. S., and Yarar, B. (1989). Natural hydrophobicity of native gold flakes and their flotation under different conditions. In Processing of complex ores (pp. 19-27). Pergamon.

Barani, K., Dehghani, M., and Azadi, M. K. (2021). Leaching of a polymetal gold ore and reducing cyanide consumption using cyanide-glycine solutions. Miner Eng. 163, 106802. https:// doi.org/10.1016/j.mineng.2021.106802.

Barani, K., Kogani, Y., and Nazarian, F. (2022). Leaching of complex gold ore using a cyanide-glycine solution. Miner Eng 180(2), 107475.

Bas, A. D., Koc, E., Yazici, E. Y., and Deveci, H. (2015). Treatment of copper-rich gold ore by cyanide leaching, ammonia pretreatment and ammoniacal cyanide leaching. Transactions of nonferrous metals society of China, 25(2), 597-607.

Bulatovic, S. M. (2007). Handbook of flotation reagents: chemistry, theory and practice: Volume 1: flotation of sulfide ores. Elsevier.

Dai, X., Simons, A., and Breuer, P. (2012). A review of copper cyanide recovery technologies for the cyanidation of copper contain ing gold ores. Miner Eng 25(1), 1-13. https://doi.org/10. 1016/j.mineng.2011.10.002.

Ernawati, R., Idrus, A., and Petrus, H. T. B. M. (2019). Study of the optimization of gold ore concentration using gravity separator (shaking table): case study for LS epithermal gold deposit in Artisanal Small scale Gold Mining (ASGM) Paningkaban, Banyumas, Central Java. In IOP Conference Series: Earth and Environmental Science (Vol. 212, No. 1, p. 012019). IOP Publishing.

Estay, H. (2018). Designing the SART process-a review. Hydrometallurgy 176, 147-165. https://doi.org/10.1016/j.hydromet.2018.01.011.

Forrest, K., Yan, D., and Dunne, R. (2001). Optimization of gold recovery by selective gold flotation for copper-gold-pyrite ores. Miner. Enger., Vol.14, No.2, 227.

Gold. U.S Environment Protection Agency, O. o. (1994). Extraction and benification of ores and Mineral. Volume 2. Washington, DC.

Gül, A., Kangal, O., Sirkeci, A. A., and Önal, G. (2012). Beneficiation of the gold bearing ore by gravity and flotation. International Journal of Minerals, Metallurgy, and Materials, 19(2), 106-110. DOI: 10.1007/s12613-012-0523-4.

Hedjazi, F. M. (2018). Industrial application of ammonia-assisted cyanide leaching for copper-gold ores. Miner Eng. 126, 123-129. https://doi. org/10.1016/j.mineng.2018.07.005.

Jeffrey, M., Linda, L., Breuer, P., and Chu, C. (2002). A kinetic and electrochemical study of the ammonia cyanide process for leaching gold in solutions containing copper. Miner Eng. 15(12), 1173-1180.

Jena, M. M. (2017). Characterization and Preconcentration of Low Grade PGE Ores of Boula Area, Odisha using Gravity Concentration Methods. Trans. Indian Inst. Met., 70, 287-302.

Klein, B., N.E. Altun, H. G., and McLeavy, M. (2010). A hybrid flotation-gravity circuit for improved metal recovery. Int.J. Miner. Process., 94, 159.

Lotter, N. (2005). Cyanide volatilisation from gold leaching operation and tailings storage facilities. PhD thesis. Uni. of Pretoria.

Maganga, S. P., Wikedzi, A., Budeba, M. D., and Manyele, S. V. (2023). Overview of the Challenges and Opportunities in Processing Complex. ining, Metallurgy and Exploration, 40, 2463-2475.

Marsden, J., and House, C. (2006). The chemistry of gold extraction. SME. Colorado.

Mc-Grath, T. D. H., Connor, L. O., and Eksteen, J. (2015). A comparison of 2D and 3D shape characterization of free gold particles in gravity and flash flotation concentrates. Miner. Eng., 82, 45-53.

Meza, L., Hartmann, W., and Escobar, a. C. (2004). Recovery of Placer Gold Using the Knelson Concentrator, 2004, http://L.A. Meza, W. Hartmann and C. Escobar, Recovery of Placer Gold Using the Knelson Concentrator.

Muir, D. (2011). A review of the selective leaching of gold from oxidised copper-gold ores with ammonia-cyanide and new insights for plant control and operation. Miner Eng 24(6), 576-582. https://doi.org/10.1016/j.mineng.2010. 08.022.

Ngo, N. D. (2011). Research on the recovery of useful elements in the process of beneficiation and smelting copper ore in Sin Quyen (Vietnamese). Hanoi: Final report of project code DT.04.10/ĐMCNKK.

Nguyen, H. S. (2009). Research on gold ore beneficiation - smelting technology from Attapeu - Laos. Hanoi: Vietnam Association for Mineral Processing.

Onel, O., and Tanriverdi, M. (2016). Use of Falcon Concentrator to Determine the Gravity Recoverable Gold (GRG) Content in Gold Ores. Journal of the Polish Mineral Engineering Society, 17(1), 189-194.

Rees, K. L., and van Deventer, J. S. J. (2000). Preg-robbing phenomena in the cyanidation of sulphide gold ores. Hydrometallurgy, 58(1), 61-80. https://doi.org/10.1016/S0304-386X(00) 00131-6.

Samah El-Sayed, N. A. K. S. M. (2020). Mineralogical study and enhanced gravity separation of gold-bearing. Physicochem. Probl. Miner. Process., 56(5), 839-848.DOI:10.37190/ppmp/125977.

Souza, C., Majuste, D., and Ciminelli, V. (2014). Effects of surface properties of activated carbon on the adsorption mechanism of copper cyanocomplexes.  Hydrometallurgy 142, 1-11.

Steyn, J. and Sandenbergh, R. F. (2004). A study of the influence of copper on the gold electrowinning process. Journal of the Southern African Institute of Mining and Metallurgy, 104(3), 177-182.

Surimbayev, B., Bolotova, L., Akcil, A., Yessengarayev, Y., Khumarbekuly, Y., Kanaly, Y., and Akzharkenov, M. (2024). Gravity Concentration of Gold-Bearing Ores and Processing of Concentrates: A Review. Mineral Processing and Extractive Metallurgy Review, 46(7), 726-750. https://doi.org/10.1080/08 827508.2024.2395824.

Ta, Q. H. (2016). Pilot Production Project: Completing the production line to recover useful minerals and treat sludge in Sin Quyen copper processing plant, Lao Cai. (in Vietnamese). Hanoi: Vinacomin - Minerals Holding Corporation.

Tanda, B., Eksteen, J., and Oraby, E. (2017). An investigation into the leaching behaviour of copper oxide minerals in aqueous alkaline glycine solutions. Hydrometallurgy 167, 153-162. https://doi.org/10.1016/j.hydromet. 2016.11.011.

Torres, R. L. (2020). Base metal citrate pretreatment of complex ores to improve gold and silver leaching with thiourea. Hydrometallurgy 197, 105461.

Tran, T. H. (2011). Study on the processability of gold ore samples in the Dak Blo gold exploration project, Dak Blo commune, Dak Glei district, Kon Tum province (in Vietnamese). Hanoi: National institute of mining - metallurgy science and technology.

Wills, B. F. (2016). in Wills' Mineral Processing Technology (18th ed). Butterworth Heinemann.

Wu, H., Feng, Y., and Huang, W. L. (2019). The role of glycine in the ammonium thiocyanate leaching of gold. Hydrometallurgy 185, 111-116. https://doi.org/10.1016/j.hydromet.2019.01.019.

Yalcin, E., and Kelebek, S. (2011). Flotation kinetics of a pyritic gold ore. Int. J. Miner. Process., 98, 48.

Yan, D. S., and Hariyasa. (1997). Selective flotation of pyrite and gold tellurides. Minerals Engineering, 10(3), 327-337. https://doi.org/ 10.1016/S0892-6875(97)00012-5.

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