Separation density prediction of geldart A^(-)dense medium in gas-solid fluidized bed coal beneficiators  

作　　者：Chenyang Zhou Chengguo Liu Yue Yuan Zhijie Fu Jesse Zhu Chenlong Duan 

机构地区：[1]School of Chemical Engineering and Technology,China University of Mining and Technology,Xuzhou,221116,China [2]Particle Technology Research Centre,Western University,London,Ontario,N6A 5B9,Canada

出　　处：《Particuology》2024年第9期251-262,共12页颗粒学报（英文版）

基　　金：National Natural Science Foundation of China(grant Nos.52220105008,52104276);China National Funds for Distinguished Young Scientists(grant No.52125403).

摘　　要：Gas-solid Fluidized Bed Coal Beneficiator(GFBCB)process is a crucial dry coal beneficiation fluidization technology.The work employs the GFBCB process alongside a novel Geldart A^(-)dense medium,consisting of Geldart A magnetite particles and Geldart C ultrafine coal,to separate small-size separated objects in the GFBCB.The effects of various operational conditions,including the volume fraction of ultrafine coal,the gas velocity,the separated objects size,and the separation time,were investigated on the GFBCB's separation performance.The results indicated that the probable error for 6∼3 mm separated objects could be controlled within 0.10 g/cm^(3).Compared to the traditional Geldart B/D dense medium,the Geldart A/A^(-)dense medium exhibited better size-dependent separation performance with an overall probable error 0.04∼0.12 g/cm^(3).Moreover,it achieved a similar separation accuracy to the Geldart B/D dense medium fluidized bed with different external energy for the small-size object beneficiation.The work furthermore validated a separation density prediction model based on theoretical derivation,available for both Geldart B/D dense medium and Geldart A/A^(-)dense medium at different operational conditions.

关 键 词：GFBCB Geldart A^(-)dense medium Separation density Separated objects size Prediction model 

分 类 号：TQ05[化学工程]