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

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

作者机构：School of Civil and Resource EngineeringUniversity of Science and Technology BeijingBeijing 100083China Key Laboratory of High-Efficient Mining and Safety of Metal Mines of the Ministry of EducationUniversity of Science and Technology BeijingBeijing 100083China Mine Emergency Technology Research CenterUniversity of Science and Technology BeijingBeijing 100083China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2019年第26卷第9期

页      面：1080-1091页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 

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) 

主　　题：blasting dust physicochemical characteristics hydrophilic contact angle iron mine 

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.