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

被引:1
作者
Mingzhong Gao [1 ,2 ]
Hongmei Li [1 ,3 ]
Yun Zhao [4 ]
Yiting Liu [1 ]
Weiqi Zhou [4 ]
Luming Li [3 ]
Jing Xie [1 ]
Jie Deng [3 ]
机构
[1] State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Sichuan University
[2] 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
[3] College of Food and Bioengineering, Chengdu University
[4] School of Mechanical Engineering, Chengdu University
关键词
Dust removal technology; Bituminous coal dust; New dust suppressant; Mine safety; Molecular dynamics;
D O I
暂无
中图分类号
TD714.4 [];
学科分类号
081903 ;
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 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, rich in 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 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 performance. This paper provides theoretical and technical support for removing highly hydrophobic bituminous coal dust in underground mining.
引用
收藏
页码:31 / 46
页数:16
相关论文
共 33 条
  • [1] Experimental study on preparation of nanoparticle-surfactant nanofluids and their effects on coal surface wettability.[J].Gang Wang;Yanqing Li;Enmao Wang;Qiming Huang;Shibin Wang;Huaixing Li;.International Journal of Mining Science and Technology.2022, 02
  • [2] Mechanical behavior of coal under different mining rates: A case study from laboratory experiments to field testing.[J].Mingzhong Gao;Jing Xie;Yanan Gao;Wenyong Wang;Cong Li;Bengao Yang;Junjun Liu;Heping Xie;.International Journal of Mining Science and Technology.2021, 05
  • [3] 考虑温度效应的煤岩损伤本构模型及参数分析
    李波波
    任崇鸿
    杨康
    李建华
    许江
    [J]. 安全与环境学报, 2019, 19 (06) : 1947 - 1954
  • [4] 中国煤矿粉尘危害防治技术现状及发展方向
    李德文
    隋金君
    刘国庆
    赵政
    [J]. 矿业安全与环保, 2019, 46 (06) : 1 - 7+13
  • [5] Effect of different concentrations of surfactant on the wettability of coal by molecular dynamics simulation.[J].Junqing Meng;Feifei Yin;Shichao Li;Ruquan Zhong;Zeyuan Sheng;Baisheng Nie;.International Journal of Mining Science and Technology.2019, 04
  • [6] 深部岩体力学与开采理论研究进展
    谢和平
    [J]. 煤炭学报, 2019, 44 (05) : 1283 - 1305
  • [7] 烟煤煤尘润湿性与无机矿物含量的关系研究
    程卫民
    薛娇
    周刚
    聂文
    文金浩
    [J]. 中国矿业大学学报, 2016, 45 (03) : 462 - 468
  • [8] Discing behavior and mechanism of cores extracted from Songke-2 well at depths below 4;500 m.[J].Mingzhong Gao;Haichun Hao;Shouning Xue;Tong Lu;Pengfei Cui;Yanan Gao;Jing Xie;Bengao Yang;Heping Xie.International Journal of Rock Mechanics and Mining Sciences.2022,
  • [9] Effect of anionic/nonionic surfactants on the wettability of coal surface
    Meng, Junqing
    Wang, Lijuan
    Zhang, Shuo
    Lyu, Yingpei
    Xia, Junkai
    [J]. CHEMICAL PHYSICS LETTERS, 2021, 785
  • [10] Experimental and molecular dynamics study into the surfactant effect upon coal wettability
    Liu, Yi-ting
    Li, Hong-mei
    Gao, Ming-zhong
    Ye, Si-qi
    Zhao, Yun
    Xie, Jing
    Liu, Gui-kang
    Liu, Jun-jun
    Li, Lu-Ming
    Deng, Jie
    Zhou, Wei-Qi
    [J]. RSC ADVANCES, 2021, 11 (40) : 24543 - 24555