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Leaching and Recovery of an Oxide Gold Concentrate Using Ammoniacal Thiosulfate Solutions

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Rare Metal Technology 2019

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

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Abstract

Thiosulfate leaching-resin adsorption recovery, an environmentally friendly process, has been developed to efficiently extract gold from an oxide gold concentrate. 80.5% of gold extraction could be achieved by thiosulfate leaching under the conditions of (NH4)2S2O3 0.2 mol/L, CuSO4 0.025 mol/L, NH3 1.5 mol/L and leaching time 8 h, and the thiosulfate consumption was 53.6 kg/t-concentrate. IRA-400 anion exchange resin was used to recover gold from the leach solution, and an adsorption efficiency of 99.3% gold and 39.4% copper was attained. Two-step elution process, including pre-elution of copper with 0.5 mol/L (NH4)2S2O3 followed by gold elution with 2 mol/L NaCl + 0.5 mol/L Na2SO3 was adopted, and 98.6% of copper and 99.1% of gold could be successfully eluted from the resin.

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Acknowledgements

Financial supports from the National Natural Science Foundation of China (grant Nos. 51504293 and 51574284), the China Postdoctoral Science Foundation (grant No. 2014M550422), Hunan Provincial Natural Science Foundation of China (grant Nos. 2015JJ3149 and 2018JJ4038), and the Fundamental Research Funds for the Central Universities of Central South University (grant No. 502210012) are all gratefully acknowledged.

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Authors and Affiliations

  1. School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China

    Zhonglin Dong, Tao Jiang, Bin Xu, Yongbin Yang & Qian Li

Authors
  1. Zhonglin Dong
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  2. Tao Jiang
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  3. Bin Xu
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  4. Yongbin Yang
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  5. Qian Li
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Corresponding author

Correspondence to Bin Xu .

Editor information

Editors and Affiliations

  1. University of Toronto, Toronto, ON, Canada

    Gisele Azimi

  2. The Pennsylvania State University, University Park, PA, USA

    Hojong Kim

  3. University of Saskatchewan, Saskatoon, SK, Canada

    Shafiq Alam

  4. University of Tokyo, Tokyo, Japan

    Takanari Ouchi

  5. IND LLC, South Jordan, UT, USA

    Neale R. Neelameggham

  6. University of Ilorin, Ilorin, Nigeria

    Alafara Abdullahi Baba

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© 2019 The Minerals, Metals & Materials Society

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Dong, Z., Jiang, T., Xu, B., Yang, Y., Li, Q. (2019). Leaching and Recovery of an Oxide Gold Concentrate Using Ammoniacal Thiosulfate Solutions. In: Azimi, G., Kim, H., Alam, S., Ouchi, T., Neelameggham, N., Baba, A. (eds) Rare Metal Technology 2019. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-05740-4_2

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