中南大学学报（自然科学版）2025，Vol.56Issue(9)：3603-3614,12.DOI:10.11817/j.issn.1672-7207.2025.09.003
乳化组合捕收剂强化油页岩浮选分离的机理研究
Study on the mechanism of enhanced oil shale flotation separation by emulsified combined collector
摘要
Abstract
To address the issue of low separation efficiency of oil shale caused by poor dispersion of non-polar hydrocarbon oil collectors,the motor oil-oleic acid(emulsified)was used as a combined collector to strengthen the efficient enrichment of kerogen in oil shale.Through the actual ore flotation test,the effects of the emulsified combined collector on oil shale flotation were systematically investigated.Multiple analytical techniques including surface tension,laser particle size analysis,contact angle measurement,zeta potential analysis,infrared spectroscopy,and X-ray photoelectron spectroscopy were utilized,the mechanism by which the motor oil-oleic acid(emulsified)combined collector enhanced oil shale flotation separation was elucidated.The results indicate that under conditions of 1 000 g/t of combined collector,1꞉3 mass ratio of motor oil and oleic acid,and a mass fraction of sodium dodecyl benzene sulfonate of 3%,a kerogen concentrates with a combustible recovery of 62.25%and a separation index of 6.40 is obtained,achieving the effective flotation separation of oil shale.This emulsified combined collector significantly reduces solution surface tension and exhibits superior dispersibility compared to the nonpolar collector(motor oil).The particle size distribution of the collectors from the large to small is motor oil,machine oil-oleic acid,motor oil-oleic acid(emulsified).The emulsified combined collector exhibits the smallest particle size and the best dispersion,thereby enhancing efficient collection of the kerogen.Compared to hydrophilic mica,motor oil-oleic acid(emulsified)is selectively adsorbed onto the kerogen surface,significantly enhancing their hydrophobicity and improving floatability.The adsorption mechanism primarily stems from hydrogen bonding between oleic acid carboxyl groups and hydroxyl groups on the kerogen surface,coupling with strong hydrophobic interactions between the motor oil and the kerogen.Mica,being hydrophilic,has a weak hydrophobic interaction with the oil-oleic acid(emulsified)collector and hardly undergoes adsorption.Consequently,this emulsified combined collector exhibits stronger selective collection capacity toward kerogen,resulting in the efficient flotation recovery of kerogen from oil shale.关键词
油页岩/浮选分离/组合捕收剂/乳化/界面吸附Key words
oil shale/flotation separation/combined collector/emulsification/interfacial adsorption分类
矿业与冶金引用本文复制引用
杨斌,郭诗海,贺靖峰,戴永平,朱凌涛..乳化组合捕收剂强化油页岩浮选分离的机理研究[J].中南大学学报（自然科学版）,2025,56(9):3603-3614,12.基金项目
国家自然科学基金资助项目(52274280) （52274280）
江苏省基础研究计划资助项目(BK20220090)(Project(52274280)supported by the National Natural Science Foundation of China （BK20220090）
Project(BK20220090)Funded by Basic Research Program of Jiangsu) （BK20220090）
