可回收微乳捕收剂的分子设计及低阶煤泥浮选研究

本项目针对低阶煤泥表面含氧官能团多、可浮性差以及传统烃油捕收剂分散性差的缺陷，以神东低阶煤为研究对象，基于分子模拟技术，设计并合成兼具高表面活性、溶解性以及强磁性的双咪唑磁性离子液体；进而，依据“分散粒径最小化”原则，制备适宜的磁性离子液体微乳捕收剂，并采用介观动力学模拟研究其自组装行为及微观结构特征；进而，查明磁性离子液体微乳捕收剂的低阶煤泥浮选性能；通过离子液体回收研究，提出磁性离子液体微乳捕收剂的盐析分离-强磁回收工艺。本项目通过研制可回收的磁性离子液体微乳捕收剂，旨在高效改善低阶煤泥可浮性、提高烃油捕收剂分散性以及降低浮选药剂成本，不仅丰富了煤泥捕收剂开发的基础理论，而且提高了低阶难浮煤泥的浮选效率，有利于促进我国低阶煤资源的高效开发。

Low rank coal slime is featured by a number of oxygen-containing functional groups on surface and low floatability, and conventional hydrocarbon oil collector has the drawback of poor dispersion. In order to address these issues, this project is proposed to design and synthesize the bis-imidazole magnetic ionic liquid with high surface activity, solubility and strong magnetism based on low rank coal from Shendong Coal Group. The suitable microemulsified collector will be prepared with the principle of minimized dispersion diameter, and the self-assembly behavior and microstructure feature of the magnetic ionic liquid microemulsified collector will be investigated by mesoscopic dynamics simulation. The flotation performance and salting-out-high intensity magnetic technology of magnetic ionic liquid microemulsified collector for low rank coal will be proposed. The objective of this proposed project is to develop magnetic ionic liquid microemulsified collector for improving floatability of low-rank coal, enhancing dispersion of hydrocarbon oil collector and reducing cost. This study will increase the flotation efficiency of low rank difficult-to-float coal slime, enriching fundamental theory for the development of coal collector. Therefore, it will greatly promote the effective exploitation and utilization of low rank coal in China.