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

论文摘要

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.

论文目录

• 1. Introduction
• 2. Experimental
•   2.1. Materials
•     2.1.1. Sample collection
•     2.1.2. Sample pretreatment
•   2.2. Experiments
•     2.2.1. Characterization of physical properties
•     2.2.2. Characterization of chemical properties
• 3. Results and discussion
•   3.1. Differences in physical properties of UWBD and WBD
•     3.1.1. Differences in micromorphologies and particle sizes of UWBD and WBD
•     3.1.2. Differences in TD and pore parameters of UWBD and WBD
•   3.2. Differences in chemical properties of UWBD and WBD
•     3.2.1. Element differences in UWBD and WBD
•     3.2.2. Differences in mineral compositions of UWBD and WBD
•     3.2.3. Differences in surface compounds of UWBD and WBD
•   3.3. Influence of physicochemical properties of BD on its hydrophilicity
• 4. Conclusions

文章来源

类型: 期刊论文

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

来源: International Journal of Minerals Metallurgy and Materials 2019年09期

年度: 2019

分类: 工程科技Ⅰ辑

专业: 矿业工程,安全科学与灾害防治

单位: School of Civil and Resource Engineering, University of Science and Technology Beijing,Key Laboratory of High-Efficient Mining and Safety of Metal Mines of the Ministry of Education, University of Science and Technology Beijing,Mine Emergency Technology Research Center, University of Science and Technology Beijing

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

分类号: TD714.1

页码: 1080-1091

总页数: 12

文件大小: 2536K

下载量: 10