Lu’ an Chemical Group Yuwu Coal Industry Co., Ltd.

以余吾矿区岩尘作为研究对象,通过分子模拟法探究复配表面活性剂AEO-7/DTAB、AEO-7/SDS和AEO-7/SDBS对岩尘表面润湿性的影响以及在各岩石体系的聚集行为以及润湿机理。研究发现,岩尘在阴离子/非离子复配体系中的润湿速度与其他溶液相比表现出显著的协同效应;表面活性剂分子在复配体系中通过形成胶束聚集体,降低溶液的临界胶束浓度。通过计算模拟体系的相互作用能,液相与各岩石之间相互作用能大小顺序遵循高岭石>白云母>石英的规律。同时,对比单一表面活性剂对岩石润湿性的影响,可以看出复配溶液在提高高岭石和石英石的润湿性能上更有优势,而对于改变白云母体系的润湿效果较难。

surfactant AEO-7 / DTAB, AEO-7 / SDS, and AEO-7 / SDBS on the surface wettability of rock dust, as well as their aggrega-tion behavior and wetting mechanism in various rock systems through molecular simulation. The conclusion is that the wet-ting rate of rock dust in the anionic/ non ionic composite system exhibits a significant synergistic effect compared to other so-lutions. Surfactant molecules form micelle aggregates in the composite system, reducing the critical micelle concentration ofthe solution. By calculating the interaction energy of the simulation system, the order of the interaction energy between theliquid phase and the rocks follows the law of kaolinite > muscovite > quartz. At the same time, by comparing the influence ofsingle surfactant on rock wettability, the compound solution has more advantages in improving the wettability of kaolinite andquartz, but it is difficult to change the wettability of muscovite system.

辽宁省教育厅青年基金(LJKQZ20222334)