Micromorphology and physicochemical properties of hydrophobic blasting dust in iron mines

Jian-guo Liu; Long-zhe Jin; Jia-ying Wang; Sheng-nan Ou; Jing-zhong Guo; Tian-yang Wang

doi:10.1007/s12613-019-1793-x

Volume 26 Issue 6

Jun. 2019

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2019 > 26(6): 665-672

Jian-guo Liu, Long-zhe Jin, Jia-ying Wang, Sheng-nan Ou, Jing-zhong Guo, and Tian-yang Wang, Micromorphology and physicochemical properties of hydrophobic blasting dust in iron mines, Int. J. Miner. Metall. Mater., 26(2019), No. 6, pp. 665-672. https://doi.org/10.1007/s12613-019-1793-x

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Jian-guo Liu, Long-zhe Jin, Jia-ying Wang, Sheng-nan Ou, Jing-zhong Guo, and Tian-yang Wang, Micromorphology and physicochemical properties of hydrophobic blasting dust in iron mines, Int. J. Miner. Metall. Mater., 26(2019), No. 6, pp. 665-672. https://doi.org/10.1007/s12613-019-1793-x

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Research Article

Micromorphology and physicochemical properties of hydrophobic blasting dust in iron mines

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Corresponding author:
Long-zhe Jin E-mail: lzjin@ustb.edu.cn
Received: 11 August 2018; Revised: 3 December 2018; Accepted: 7 December 2018

Abstract

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.
- iron mine dust;
- respirable dust;
- hydrophobic blasting dust;
- microstructure;
- physicochemical properties;
- particle size

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