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Co-influencing mechanisms of physicochemical properties of blasting dust in iron mines on its wettability

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Abstract

This study explores the key physicochemical factors affecting the hydrophilic characteristics of iron mine blasting dust (BD). The BD is separated into an unwetted part (UWBD, hydrophobic part) and a wetted part (WBD, hydrophilic part). Its particle size, true density (TD), pore parameters, mineral composition, and surface compounds are comprehensively characterized and compared. The results indicate that a smaller particle size and more developed pore parameters are two key factors responsible for the strong hydrophobicity of the BD. The mineral composition of the BD has no direct effect on its wetting properties; however, it indirectly influences the deposition characteristics of the BD in water by affecting its TD. Unlike coal dust, the surface organic composition of the BD does not affect its wettability and the peak area of C-C/C-H hydrophobic groups in the C Is X-ray photoelectron spectrum of the UWBD (45.03%) is smaller than that in the C Is spectrum of the WBD (68.30%). Thus, eleven co-influencing processes of physicochemical properties of the BD on its wettability are summarized. This research sheds light on the key factors affecting the wettability of the BD.

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Acknowledgements

This work was financially supported by the National Key Research and Development Program of China (No. 2017YFC0805204) and the National Natural Science Foundation of China (Nos. 51874015 and 51504017).

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Authors and Affiliations

  1. School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Jian-guo Liu, Long-zhe Jin, Jia-ying Wang, Sheng-nan Ou & Tian-yang Wang

  2. Key Laboratory of High-Efficient Mining and Safety of Metal Mines of the Ministry of Education, University of Science and Technology Beijing, Beijing, 100083, China

    Jian-guo Liu, Long-zhe Jin, Jia-ying Wang, Sheng-nan Ou & Tian-yang Wang

  3. Mine Emergency Technology Research Center, University of Science and Technology Beijing, Beijing, 100083, China

    Jian-guo Liu, Long-zhe Jin, Jia-ying Wang, Sheng-nan Ou & Tian-yang Wang

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  1. Jian-guo Liu
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  2. Long-zhe Jin
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Correspondence to Long-zhe Jin.

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Liu, Jg., Jin, Lz., Wang, Jy. et al. Co-influencing mechanisms of physicochemical properties of blasting dust in iron mines on its wettability. Int J Miner Metall Mater 26, 1080–1091 (2019). https://doi.org/10.1007/s12613-019-1874-x

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  • DOI: https://doi.org/10.1007/s12613-019-1874-x

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