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

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

doi:10.1007/s12613-019-1874-x

Volume 26 Issue 9

Sep. 2019

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文章导航 > 矿物冶金与材料学报（英文） > 2019 > 26(9): 1080-1091

Jian-guo Liu, Long-zhe Jin, Jia-ying Wang, Sheng-nan Ou, and Tian-yang Wang, Co-influencing mechanisms of physicochemical properties of blasting dust in iron mines on its wettability, Int. J. Miner. Metall. Mater., 26(2019), No. 9, pp. 1080-1091. https://doi.org/10.1007/s12613-019-1874-x

Cite this article as:

Jian-guo Liu, Long-zhe Jin, Jia-ying Wang, Sheng-nan Ou, and Tian-yang Wang, Co-influencing mechanisms of physicochemical properties of blasting dust in iron mines on its wettability, Int. J. Miner. Metall. Mater., 26(2019), No. 9, pp. 1080-1091. https://doi.org/10.1007/s12613-019-1874-x

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研究论文

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

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

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

中文摘要

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 1s X-ray photoelectron spectrum of the UWBD (45.03%) is smaller than that in the C 1s 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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Research Article

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

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Abstract

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 1s X-ray photoelectron spectrum of the UWBD (45.03%) is smaller than that in the C 1s 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.
- blasting dust;
- physicochemical characteristics;
- hydrophilic;
- contact angle;
- iron mine

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

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

Abstract

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