Assessment of Time-Gated Raman Spectroscopy for Online Mineralogy of a Spodumene Ore
Laitinen, Teemu; Legault, Marc; Ojala, Satu; Boulanger, Jean François (2024-11-14)
John Wiley & Sons
14.11.2024
Laitinen, T., Legault, M., Ojala, S. and Boulanger, J.-F. (2025), Assessment of Time-Gated Raman Spectroscopy for Online Mineralogy of a Spodumene Ore. J Raman Spectrosc, 56: 135-145. https://doi.org/10.1002/jrs.6748
https://creativecommons.org/licenses/by-nc/4.0/
© 2024 The Author(s). Journal of Raman Spectroscopy published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
https://creativecommons.org/licenses/by-nc/4.0/
© 2024 The Author(s). Journal of Raman Spectroscopy published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
https://creativecommons.org/licenses/by-nc/4.0/
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202411226868
https://urn.fi/URN:NBN:fi:oulu-202411226868
Tiivistelmä
Abstract
This paper investigates the applicability of time-gated Raman spectroscopy (TRS) for online mineralogy identification, focusing on a Li-bearing spodumene ore. The study provides an overview of existing online mineralogy tools and points out some limitations of elemental analysis techniques. Dense media separation concentrate and tailing samples used originated from a deposit in Quebec, Canada. Various techniques, including ICP-AES, XRD, laser diffraction, and specific gravity determination, were used for detailed sample characterization. Samples and their mixtures at known ratios were prepared as powder and slurries, before being analyzed using TRS, followed by spectrum quantitative analysis. Results show a linear correlation between spodumene percentage by weight and the main Raman peak height or area, in both dry and slurry form, with a higher determination coefficient in slurry form. TRS also provided indications as to the gangue minerals present in the samples. This study shows the potential for TRS as a tool for online mineralogical assessment of spodumene ores, and further work should target the determination of detection limits and quantification of both valuable and gangue minerals.
This paper investigates the applicability of time-gated Raman spectroscopy (TRS) for online mineralogy identification, focusing on a Li-bearing spodumene ore. The study provides an overview of existing online mineralogy tools and points out some limitations of elemental analysis techniques. Dense media separation concentrate and tailing samples used originated from a deposit in Quebec, Canada. Various techniques, including ICP-AES, XRD, laser diffraction, and specific gravity determination, were used for detailed sample characterization. Samples and their mixtures at known ratios were prepared as powder and slurries, before being analyzed using TRS, followed by spectrum quantitative analysis. Results show a linear correlation between spodumene percentage by weight and the main Raman peak height or area, in both dry and slurry form, with a higher determination coefficient in slurry form. TRS also provided indications as to the gangue minerals present in the samples. This study shows the potential for TRS as a tool for online mineralogical assessment of spodumene ores, and further work should target the determination of detection limits and quantification of both valuable and gangue minerals.
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