磁化活性水对烟煤润湿性能研究

Study on the wettability of magnetized activewater to bituminous coal

为改善普通水雾对难浸润煤尘的治理效果,提出了磁化活性水雾降尘技术,以烟煤为研究对象,通过表面张力、接触角、煤尘沉降时间及雾滴粒径测量实验对单体表面活性剂进行优选,得到最佳复配比例,并对最佳复配表面活性剂溶液进行磁化性能测试,最后利用模拟巷道平台进行不同水质的动态降尘测试。实验结果表明:阴离子活性剂快T、非离子表面活性剂AEO-9显现了较强的湿润性能。2种单体活性剂复配使煤尘沉降时间及接触角进一步降低,最佳体积配比为3∶3。进一步对复配溶液进行磁化处理后,复配溶液的表面张力、接触角再一次降低,最佳磁感应强度、磁化时间分别为4000 Gs和50 min。磁化复配活性喷雾降尘技术的降尘效率最高,磁化喷雾技术全尘及呼尘降尘效率分别达87%以上和80%以上,较非磁化技术分别提高31.1%和30.6%。对于消除井下煤尘危害,保护井下作业人员的生命安全,保障煤矿安全生产具有重要意义。

In order to improve the treatment effect of ordinary water mist on difficult to infiltrate coal dust,the magnetizing active water mist dust removal technology was proposed.Taking bituminous coal as the research object,the monomer surfactant was optimized through surface tension,contact angle,coal dust settling time and droplet particle size measurement experiments to obtain the optimal mixing ratio,and the magnetizing performance of the optimal mixing surfactant solution was tested.Finally,the dynamic dust removal test of different water quality was carried out by using the simulated roadway platform.The experimental results show that the anionic surfactant Fast T and the non-ionic surfactant AEO-9 exhibit strong wetting properties.The combination of the two monomer active agents can further reduce the settling time and contact Angle of coal dust,and the optimal volume ratio is 3∶3.After further magnetization treatment,the surface tension and contact Angle of the composite solution were reduced again,and the optimal magnetic induction intensity and magnetization time were 4000 Gs and 50 min.The dust removal efficiency of magnetization combined with active spray technology is the highest,and the total dust removal efficiency of magnetization spray technology is more than 87%and more than 80%,which is 31.1%and 30.6%higher than that of non-magnetization technology.This technology is of great significance for eliminating coal dust hazards,protecting the life safety of underground workers and ensuring the safety of coal mine production.