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Ferric ion-triggered surface oxidation of galena for efficient chalcopyrite-galena separation

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Abstract

The efficient separation of chalcopyrite (CuFeS2) and galena (PbS) is essential for optimal resource utilization. However, finding a selective depressant that is environmentally friendly and cost effective remains a challenge. Through various techniques, such as microflotation tests, Fourier transform infrared spectroscopy, scanning electron microscopy (SEM) observation, X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy measurements, this study explored the use of ferric ions (Fe3+) as a selective depressant for galena. The results of flotation tests revealed the impressive selective inhibition capabilities of Fe3+ when used alone. Surface analysis showed that Fe3+ significantly reduced the adsorption of isopropyl ethyl thionocarbamate (IPETC) on the galena surface while having a minimal impact on chalcopyrite. Further analysis using SEM, XPS, and Raman spectra revealed that Fe3+ can oxidize lead sulfide to form compact lead sulfate nanoparticles on the galena surface, effectively depressing IPETC adsorption and increasing surface hydrophilicity. These findings provide a promising solution for the efficient and environmentally responsible separation of chalcopyrite and galena.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Nos. 52204298 and 52004335), the National Key R&D Program of China (Nos. 2022YFC2904502 and 2022YFC2904501), the Major Science and Technology Projects in Yunnan Province (No. 202202AB080012), and the Science Research Initiation Fund of Central South University (No. 202044019).

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Authors and Affiliations

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

    Qiancheng Zhang, Feng Jiang, Honghu Tang, Li Wang & Wei Sun

  2. Engineering Research Center of Ministry of Education for Carbon Emission Reduction in Metal Resource Exploitation and Utilization, Changsha, 410083, China

    Qiancheng Zhang, Feng Jiang, Honghu Tang, Li Wang & Wei Sun

  3. School of Resource and Environment, Hunan University of Technology and Business, Changsha, 410083, China

    Limin Zhang

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  1. Qiancheng Zhang
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Correspondence to Feng Jiang.

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Zhang, Q., Zhang, L., Jiang, F. et al. Ferric ion-triggered surface oxidation of galena for efficient chalcopyrite-galena separation. Int J Miner Metall Mater 31, 261–267 (2024). https://doi.org/10.1007/s12613-023-2674-x

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  • DOI: https://doi.org/10.1007/s12613-023-2674-x

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