Research and application of combined process of classification and separation of coal with liquid-solid fluidized bed

To solve the problems of wider size fraction of fine feed,high ash content fine slimes are entrained into overflow so that coursed high ash content of clean coal during liquid-solid fluidized bed separation,which seriously effected the liquid-solid fluidized bed separation result and clean coal quality,presents combined process of liquid-solid classification and coal cleaning with liquid-solid fluidized bed,in which the coarse and fine slim classified with liquid-solid fluidized bed and the overflow separated with flotation,the underflow separated with second liquid-solid fluidized bed,which process can precisely separate both coarse and fine slimes.The application results in Liangbei coal preparation plant show that the combined process of liquid-solid classification and coal cleaning with liquid-solid fluidized bed obtained better result,the high ash content fine slimes decreased by 80.32% in feed,and ash content in coarse clean coal decreased by 2.43%.