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

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

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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 analysis.Laboratory 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 coal.The results show that the surface of highly hydrophobic bituminous coal is compact,richin inorganic minerals,and poorly wettable and that coal molecules are dominated by hydrophobic functional groups of aromatic rings and aliphatic structures.The wetting performance of surfactants as the intermediate carrier to con-nect 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 performance.This paper provides theoretical and technical support for removing highly hydrophobic bituminous coal dust in underground mining.

Dust removal technologyBituminous coal dustNew dust suppressantMine safetyMolecular dynamics

Mingzhong Gao、Hongmei Li、Yun Zhao、Yiting Liu、Weiqi Zhou、Luming Li、Jing Xie、Jie Deng

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State Key Laboratory of Hydraulics and Mountain River Engineering,College of Water Resource and Hydropower,Sichuan University,Chengdu 610065,China

Guangdong Provincial Key Laboratory of Deep Earth Sciences,Geothermal Energy Exploitation and Utilization,Institute of Deep Earth Sciences and Green Energy,College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518060,China

College of Food and Bioengineering,Chengdu University,Chengdu 610106,China

School of Mechanical Engineering,Chengdu University,Chengdu 610106,China

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2023

矿业科学技术学报(英文版)
中国矿业大学

矿业科学技术学报(英文版)

CSTPCDCSCD北大核心EI
影响因子：1.222
ISSN：2095-2686
年,卷(期)：2023.33(1)
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