CAS OpenIR
Drying of lignite during beneficiation in the air dense medium fluidized bed under mild conditions
Zhu, Xueshuai1; Feng, Ping1,2; Wei, Lubin1
2019-05-01
Source PublicationFUEL PROCESSING TECHNOLOGY
ISSN0378-3820
Volume187Pages:28-35
AbstractHigh water content and ash content are major challenges in lignite utilization. The beneficiation processes, between the mining and upgrading, can achieve deashing and dewatering. An air dense medium fluidized bed integrated drying and beneficiation of lignite was designed in the present research. The drying characteristics of lignite in designed fluidized bed under mild conditions were investigated. Results show that for refractory lignite with diameters from 13 mm to 25 mm, the surface water removal efficiency reaches up to 91% and the adhesion efficiency of dense medium decreased to 0.16% at 85 degrees C for 2 min with original surface water content of 1.2% and air velocity of 3.5 cm/s. The probable error of separation Ep is 0.048 g/cm(3) which is much lower than that of common air dense medium fluidized bed. Based on momentum transfer, heat transfer and mass transfer between moist lignite, adhered dense medium, fluidized dense medium and hot air in the fluidized bed, the drying process in lignite beneficiation was detailed explained. During drying in beneficiation, the dense medium adhered on lignite surface play a significant role since they helped moisture transfer from lignite surface to the hot air, realizing the removal of surface water.
KeywordLignite Dry coal beneficiation Air dense medium fluidized bed Drying Mass and heat transfer
DOI10.1016/j.fuproc.2019.01.012
Language英语
WOS KeywordTAR COMPONENTS ; FINE LIGNITE ; COAL SLIME ; OIL-SHALE ; SEPARATION ; GASIFICATION
Funding ProjectNational Natural Science Foundation of China[51604281] ; Open Research Fund of State Key Laboratory of Multiphase Complex Systems[MPCS-2017-D-12]
WOS Research AreaChemistry ; Energy & Fuels ; Engineering
WOS SubjectChemistry, Applied ; Energy & Fuels ; Engineering, Chemical
Funding OrganizationNational Natural Science Foundation of China ; Open Research Fund of State Key Laboratory of Multiphase Complex Systems
WOS IDWOS:000459842100004
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/28226
Collection中国科学院过程工程研究所
Corresponding AuthorFeng, Ping
Affiliation1.China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100083, Peoples R China
2.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Zhu, Xueshuai,Feng, Ping,Wei, Lubin. Drying of lignite during beneficiation in the air dense medium fluidized bed under mild conditions[J]. FUEL PROCESSING TECHNOLOGY,2019,187:28-35.
APA Zhu, Xueshuai,Feng, Ping,&Wei, Lubin.(2019).Drying of lignite during beneficiation in the air dense medium fluidized bed under mild conditions.FUEL PROCESSING TECHNOLOGY,187,28-35.
MLA Zhu, Xueshuai,et al."Drying of lignite during beneficiation in the air dense medium fluidized bed under mild conditions".FUEL PROCESSING TECHNOLOGY 187(2019):28-35.
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