Mechanism of micro-wetting of highly hydrophobic coal dust in underground mining and new wetting agent development

作     者：Mingzhong Gao Hongmei Li Yun Zhao Yiting Liu Weiqi Zhou Luming Li Jing Xie Jie Deng Mingzhong Gao;Hongmei Li;Yun Zhao;Yiting Liu;Weiqi Zhou;Luming Li;Jing Xie;Jie Deng

作者机构：State Key Laboratory of Hydraulics and Mountain River EngineeringCollege of Water Resource and HydropowerSichuan UniversityChengdu 610065China Guangdong Provincial Key Laboratory of Deep Earth SciencesGeothermal Energy Exploitation and UtilizationInstitute of Deep Earth Sciences and Green EnergyCollege of Civil and Transportation EngineeringShenzhen UniversityShenzhen 518060China College of Food and BioengineeringChengdu UniversityChengdu 610106China School of Mechanical EngineeringChengdu UniversityChengdu 610106China 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2023年第33卷第1期

页      面：31-46页

核心收录：

学科分类：0819[工学-矿业工程] 081903[工学-安全技术及工程] 08[工学] 

基　　金：We thank Faith Pangilinan for critical advice and suggestions. The authors' responsibilities were as follows—JR, BK, HCD, and LCB: designed the research JR, BK, D Bernard, and D Bedja: conducted the research JR and BK: analyzed the data and wrote the paper HCD and LCB: had primary responsibility for the final content and all authors: read and approved the final manuscript 

主　　题：Dust removal technology Bituminous coal dust New dust suppressant Mine safety Molecular dynamics 

摘      要：The internal mechanism of the high hydrophobicity of the coal samples from the Pingdingshan mining area was studied through industrial,element,and surface functional group *** testing and molecular dynamics simulations were employed to study the impact of three types of surfactants on the surface adsorption properties and wettability of highly hydrophobic bituminous *** results show that the surface of highly hydrophobic bituminous coal is compact,rich in inorganic minerals,and poorly wettable and that coal molecules are dominated by hydrophobic functional groups of aromatic rings and aliphatic *** wetting performance of surfactants as the intermediate carrier to connect coal and water molecules is largely determined by the interaction force between surfactants and coal(Fs-c)and the interaction force between surfactants and water(Fs-w),which effectively improve the wettability of modified coal dust via modifying its surface electrical properties and surface energy.A new type of wetting agent with a dust removal rate of 89%has been developed through discovery of a compound wetting agent solution with optimal wetting and settling *** paper provides theoretical and technical support for removing highly hydrophobic bituminous coal dust in underground mining.