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Study on the Mechanism of Nanobubble-Coated Flake Graphite Ore Flotation in Short Circuits

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Abstract

Nanobubbles are an important means to enhance the flotation of fine refractory minerals. Generally, nanobubbles are preferentially adsorbed on mineral surfaces, which increases the hydrophobicity of the surfaces. For flake graphite ore, nanobubbles coated on graphite surfaces reduce the thickness of the hydrated film on the mineral surface and increase its hydrophobicity. In comparative experiments performed here, short flotation circuits of small flake graphite coated with nanobubbles achieved a 92.81% average fixed carbon grade of graphite concentrate, whereas conventional flotation circuits achieved an average of 88.15%. In addition, the concentrate recovery of short flotation circuits with nanobubbles was higher than that of conventional flotation circuits. This result shows that nanobubbles enhanced graphite particle flotation. Further, in this process, reducing the grinding duration is beneficial to avoid the overgrinding of concentrate, maintain the flake scale size of graphite, and improve the grade of the graphite concentrate.

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Acknowledgement

This study was funded by the Open Foundation of State Key Laboratory of Mineral Processing (BGRIMM-KJSKL-2022-18).

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, 454000, China

    Xiaowei Deng, Le Chen, Jinwen Wu, Bo Lv, Chaojun Fang & Yinggang Hou

  2. State Key Laboratory of Mineral Processing, Beijing General Research Institute of Mining and Metallurgy, Beijing, 100160, China

    Xiaowei Deng & Bo Lv

  3. Ordos Institute of Clean Coal Development and Utilization Henan Polytechnic University, Ordos, 017000, China

    Xiaowei Deng, Le Chen, Jinwen Wu, Bo Lv & Chaojun Fang

  4. Ordos Carbon Source Technology Co. Ltd, Ordos, 017010, China

    Xiaowei Deng

Authors
  1. Xiaowei Deng
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  2. Le Chen
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  3. Jinwen Wu
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  4. Bo Lv
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Contributions

Data curation, Xiaowei Deng, Le Chen and Bo Lv; Formal analysis, Xiaowei Deng and Jinwen Wu; Funding acquisition, Xiaowei Deng and Chaojun Fang; Investigation, Xiaowei Deng, Jinwen Wu and Bo Lv; Methodology, Xiaowei Deng and Jinwen Wu; Resources, Xiaowei Deng and Chaojun Fang; Software, Bo Lv and Chaojun Fang; Supervision, Xiaowei Deng and Chaojun Fang; Visualization, Bo Lv and Le Chen; Writing–original draft, Xiaowei Deng; Writing–review and editing, Xiaowei Deng and Chaojun Fang.

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Correspondence to Xiaowei Deng.

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Deng, X., Chen, L., Wu, J. et al. Study on the Mechanism of Nanobubble-Coated Flake Graphite Ore Flotation in Short Circuits. JOM 76, 1984–1993 (2024). https://doi.org/10.1007/s11837-024-06411-x

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  • DOI: https://doi.org/10.1007/s11837-024-06411-x

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