煤粉粒径及含量对纳米流体润湿强化效果的影响  

Influence of Coal Powder Particle Size and Content on the Wetting Enhancement Effect of Nanofluid

作　　者：吴光先 赵管柱 杜佩剑 贾雪祺 秦兴林 WU Guangxian;ZHAO Guanzhu;DU Peijian;JIA Xueqi;QIN Xinglin(Shanxi Baoli Hesheng Coal Industry Co.,Ltd.,Jinzhong 031300,China;School of Resources and Safety Engineering,Chongqing University,Chongqing 400044,China;Shenyang Research Institute,China Coal Technology and Engineering Group,Fushun 113122,China;State Key Lab of Coal Mine Safety Technology,Fushun 113122,China)

机构地区：[1]山西保利合盛煤业有限公司,山西晋中031300 [2]重庆大学资源与安全学院,重庆400044 [3]中煤科工集团沈阳研究院有限公司,辽宁抚顺113122 [4]煤矿安全技术国家重点实验室,辽宁抚顺113122

出　　处：《山西煤炭》2023年第4期53-58,共6页Shanxi Coal

摘　　要：针对深部井下钻孔抽采瓦斯钻孔施工面临巷道粉尘严重,钻孔排渣慢、危害作业人员健康、影响抽采效率等问题,提出将二氧化硅(SiO_(2))纳米流体作为煤粉润湿剂,探究其强化润湿煤粉表面的能力,查明其作为注水降沉剂的应用效果。实验选用去离子水和纳米流体进行煤粉润湿实验,改变煤粉粒径和润湿剂-煤粉配比,采用接触角测量仪等设备量化煤粉表面润湿性。研究表明,SiO_(2)纳米流体能将煤粉表面由亲油性改性为亲水性,通过SEM表征发现,煤粉经纳米流体润湿后表面被纳米颗粒覆盖,Si的表观浓度达到36.22,原子占比为11.39%。During the process of deep underground drilling,drilling construction faces problems such as severe tunnel dust,slow drilling slag discharge,harm to the health of operators,and affect extraction efficiency.The study proposes to use silica nanofluid as a coal dust wetting agent to investigate its ability to strengthen the wetting of coal dust surface and its application as a water injection and sinking agent to overcome the above problems.The wetting experiments were carried out by selecting deionized water and nanofluid,changing the particle size of coal powder and the ratio of wetting agent-coal powder,and quantifying the surface wettability of coal powder by using a contact angle measuring instrument and other equipment.The results showed that the silica nanofluid could transform the surface of coal powder from lipophilic to hydrophilic.Through the SEM characterization,it was found that the surface of coal powder wetted by the nanofluid was covered by nanoparticles,with the apparent concentration of Si 36.22 and the atomic occupation ratio 11.39%.

关 键 词：纳米流体 润湿性 煤尘 降尘 钻孔排渣 

分 类 号：TD714[矿业工程—矿井通风与安全]