中南大学学报（自然科学版）2025，Vol.56Issue(9)：3587-3602,16.DOI:10.11817/j.issn.1672-7207.2025.09.002
超重力离心场强化粒群分层及煤系油页岩预富集试验研究
Experimental study on enhanced stratification of particle groups and pre-enrichment of coal-series oil shale by supergravity centrifugal field
摘要
Abstract
Through theoretical calculations,the settlement rules of particles with different density components in the supergravity centrifugal force field were explored,and the influence of operating factors such as centrifugal speed and solid mass fraction on the particle segregation,layering and mismatching behavior in the centrifugal field was investigated.Further,a supergravity separation system was built for the separation of coal-measure oil shale with different particle size grades.The results show that the supergravity centrifugal field significantly enhances the effect of particle segregation and layering according to density differences.Compared with the conventional gravitational field,the ash segregation degrees of the simulated materials with particle size grades of(0.250,0.500],(0.125,0.250]and[0.074,0.125]mm increase by 0.15,0.15 and 0.13,respectively.Moreover,the higher the proportion of coarse particle size grade particles in the mixed material,the better the segregation and layering effect of the particle group.When the solid phase mass fraction is 20%and the centrifugal speed is 400 r/min,the(0.250,0.500],(0.125,0.250],[0.074,0.125]mm ash segregation degree of the mixed material with the mass ratio of each particle size fraction component being 2꞉1꞉1 is 0.418.Under the optimal separation conditions,the deashing efficiencies of coal-measure oil shale with particle size grades of(0.250,0.500],(0.125,0.250],[0.074,0.125]and[0.074,0.500]mm are 37.85%(834 r/min,0.04 MPa),25.71%(973 r/min,0.04 MPa),30.68%(1 112 r/min,0.02 MPa),22.08%(1 112 r/min,0.05 MPa),respectively.The oil content of the concentrate is increased by 2.69%,2.05%,2.63%and 1.9%compared with the raw ore,respectively.The separation and pre-enrichment of coal-measure oil shale by the supergravity centrifugal field provides technical support for promoting the efficient utilization of coal-series oil shale resources.关键词
超重力离心场/颗粒沉降/煤系油页岩/离析分层/分选预富集Key words
supergravity centrifugal field/particle sedimentation/coal-series oil shale/stratification/pre-enrichment分类
矿业与冶金引用本文复制引用
朱凌涛,付李想,贺靖峰,姚庆尧,杨斌..超重力离心场强化粒群分层及煤系油页岩预富集试验研究[J].中南大学学报（自然科学版）,2025,56(9):3587-3602,16.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项目(BK20220090)(Project(52274280)supported by the National Natural Science Foundation of China （BK20220090）
Project(BK20220090)supported by the Basic Research Program of Jiangsu Province) （BK20220090）
