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

Qiancheng Zhang; Limin Zhang; Feng Jiang; Honghu Tang; Li Wang; Wei Sun

doi:10.1007/s12613-023-2674-x

Volume 31 Issue 2

Feb. 2024

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2024 > 31(2): 261-267

Qiancheng Zhang, Limin Zhang, Feng Jiang, Honghu Tang, Li Wang, and Wei Sun, Ferric ion-triggered surface oxidation of galena for efficient chalcopyrite–galena separation, Int. J. Miner. Metall. Mater., 31(2024), No. 2, pp. 261-267. https://doi.org/10.1007/s12613-023-2674-x

Cite this article as:

Qiancheng Zhang, Limin Zhang, Feng Jiang, Honghu Tang, Li Wang, and Wei Sun, Ferric ion-triggered surface oxidation of galena for efficient chalcopyrite–galena separation, Int. J. Miner. Metall. Mater., 31(2024), No. 2, pp. 261-267. https://doi.org/10.1007/s12613-023-2674-x

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Research Article

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

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Corresponding author:
Feng Jiang E-mail: feng_jiang@csu.edu.cn
Received: 15 March 2023; Revised: 8 May 2023; Accepted: 11 May 2023; Available online: 12 May 2023

Abstract

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.
- galena;
- chalcopyrite;
- ferric ions;
- flotation separation;
- surface oxidation

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