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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文章导航 > 矿物冶金与材料学报（英文） > 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

Cite this article as:

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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研究论文

Micromorphology and physicochemical properties of hydrophobic blasting dust in iron mines

School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
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
Mine Emergency Technology Research Center, University of Science and Technology Beijing, Beijing 100083, China
College of Safety Engineering, North China Institute of Science and Technology, Yanjiao 101601, China

通讯作者:
Long-zhe Jin E-mail: lzjin@ustb.edu.cn

中文摘要

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.

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Research Article

Micromorphology and physicochemical properties of hydrophobic blasting dust in iron mines

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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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Micromorphology and physicochemical properties of hydrophobic blasting dust in iron mines

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Micromorphology and physicochemical properties of hydrophobic blasting dust in iron mines

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