煤炭转化2026，Vol.49Issue(3)：69-78,10.DOI:10.19726/j.cnki.ebcc.202603007
空化射流强化煤气化细渣浮选炭灰分离研究
Study on applicability of cavitation jet for enhanced coal gasification fine slag flotation and carbon ash separation
摘要
Abstract
Coal gasification fine slag(CGFS)faces technical bottlenecks such as high reagent consumption and poor separation indices in conventional flotation technology due to the well-developed pore structure on the residual carbon surface and severe oxidation.In this study,a cavitation jet was introduced into conventional to enhance the flotation process,and flotation tests and flotation kinetic studies were carried out on three types of CGFS.Compared with the conventional flotation results,for the three CGFS samples,cavitation-jets flotation increased the flotation perfection index by 24.40%,19.84%,and 16.48%,while reducing the kerosene dosage by 60%,20%,and 60%.The results fitted by the classical first-order kinetic model show that the flotation rate constant k values of all three CGFS samples enhanced by cavitation jets increase to above 0.8,indicating a significantly improved flotation rate.The analysis results show that compared with the conventional flotation technique,the significant reduction of kerosene droplet size after cavitation jet enhancement promotes the enhancement of hydrophobicity on the residual char surface,and at the same time generates microbubbles with an average bubble size of less than 56.9 μm,which explains to a certain extent the improvement of carbon-ash separation effect.Cavitation jet enhances the flotation carbon-ash separation process of CGFS,which has significant advantages in reducing reagent dosage and improving separation indices,and has good adaptability to different CGFS.The cavitation jet provides a technical approach for the efficient flotation carbon-ash separation of CGFS.关键词
煤气化细渣/炭灰分离/浮选/空化射流/动力学Key words
coal gasification fine slag/carbon ash separation/flotation/cavitation jet/kinetics分类
化学化工引用本文复制引用
刘静波,杨宏丽,李文杰,张芷祎,董连平,樊盼盼,鲍卫仁,王建成..空化射流强化煤气化细渣浮选炭灰分离研究[J].煤炭转化,2026,49(3):69-78,10.基金项目
国家重点研发计划项目(2023YFB4103501、2022YFB4101604) （2023YFB4103501、2022YFB4101604）
