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Micromorphology and physicochemical properties of hydrophobic blasting dust in iron mines

  • Jian-guo Liu
  • Long-zhe JinEmail author
  • Jia-ying Wang
  • Sheng-nan Ou
  • Jing-zhong Ghio
  • Tian-yang Wang
Article
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Abstract

The micromorphology and physicochemical properties of hydrophobic blasting dust (HBD) from an iron mine were comprehensively analyzed by laser particle size analysis (LPSA), scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The results show that the HBD particles can be classified into three types based on their particle size (PS): larger particles (PS > 10 µm), medium particles (1 µm ≤ PS ≤ 10 µm), and nanoparticles (PS > 1 µm). The cumulative volume of respirable dust (PS > 10 µm) was 84.45%. In addition, three shapes of HBD were observed by SEM: prism, flake, and bulk. In particular, the small particles were mostly flaky, with a greater possibility of being inhaled. Furthermore, the body and surface chemical compounds of HBD were determined by XRD and XPS, respectively. Ammonium adipate (C6H16N2O4) was the only organic compound in the body of HBD, but its mass fraction was only 13.4%. However, the content of organic C on the surface of HBD was 85.35%. This study demonstrated that the small-particle size and large amount of organic matter on the surface of HBD are the main reasons for its hydrophobicity, which can provide important guidance for controlling respirable dust in iron mines.

Keywords

iron mine dust respirable dust hydrophobic blasting dust microstructure physicochemical properties particle size 

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Acknowledgements

This work is financially supported by the National Key Research and Development Program of China (No. SQ2017YFSF060069) and the National Natural Science Foundation of China (No. 51574017).

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Copyright information

© University of Science and Technology Beijing and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Jian-guo Liu
    • 1
    • 2
    • 3
  • Long-zhe Jin
    • 1
    • 2
    • 3
    Email author
  • Jia-ying Wang
    • 1
  • Sheng-nan Ou
    • 1
    • 2
    • 3
  • Jing-zhong Ghio
    • 1
    • 4
  • Tian-yang Wang
    • 1
  1. 1.School of Civil and Resource EngineeringUniversity of Science and Technology BeijingBeijingChina
  2. 2.Key Laboratory of High-Efficient Mining and Safety of Metal Mines of the Ministry of EducationUniversity of Science and Technology BeijingBeijingChina
  3. 3.Mine Emergency Technology Research CenterUniversity of Science and Technology BeijingBeijingChina
  4. 4.College of Safety EngineeringNorth China Institute of Science and TechnologyYanjiaoChina

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