Modularized dry coal beneficiation technique based on gas-solid fluidized bed  

作　　者：赵跃民 李功民 骆振福 梁春成 唐利刚 陈增强 邢洪波 

机构地区：[1]School of Chemical Engineering and Technology,China University of Mining and Technology [2]Tangshan Shenzhou Manufacturing Co.,Ltd. [3]State Key Laboratory of Multiphase Complex Systems,Institute of Process Engineering,Chinese Academy of Sciences

出　　处：《Journal of Central South University》2011年第2期374-380,共7页中南大学学报（英文版）

基　　金：Projects(50921002, 50774084) supported by the National Natural Science Foundation of China;Project(2007AA05Z318) supported by the National High-tech Research and Development Program of China;Project(BK2010002) supported by the Natural Science Foundation of Jiangsu Province of China;Project(20100480473) supported by the China Postdoctoral Science Foundation

摘　　要：A 40-60 t/h modularized dry coal beneficiation process with a novel method to control the bed was designed around a gas-solid fluidized bed separator. Furthermore, the hydrodynamics of medium-solids consisting of wide-size-range magnetite powder （0.3-0.06 ram） and 〈1 mm fine coal were numerically studied. The simulation results show that the fluidization performance of the wide-size-range medium-solid bed is good. The separation performance of the modularized system was then investigated in detail using a mixture of 〈0.3 mm magnetite powder （mass fraction of 0.3-0.06 mm particles is 91.38 %） and 〈1 mm fine coal as solid media. The experimental results show that at separation densities of 1.33 g/cm^3 or 1.61 g/cm^3, 50-6 mm coal can be separated effectively with probable error, E, values of 0.05 g/cm^3 and 0.06 g/cm^3, respectively. This technique is beneficial for saving water resources and for the clean utilization of coal.A 40-60 t/h modularized dry coal beneficiation process with a novel method to control the bed was designed around a gas-solid fluidized bed separator. Furthermore,the hydrodynamics of medium-solids consisting of wide-size-range magnetite powder (0.3-0.06 mm) and <1 mm fine coal were numerically studied. The simulation results show that the fluidization performance of the wide-size-range medium-solid bed is good. The separation performance of the modularized system was then investigated in detail using a mixture of <0.3 mm magnetite powder (mass fraction of 0.3-0.06 mm particles is 91.38 %) and <1 mm fine coal as solid media. The experimental results show that at separation densities of 1.33 g/cm3 or 1.61 g/cm3,50-6 mm coal can be separated effectively with probable error,E,values of 0.05 g/cm3 and 0.06 g/cm3,respectively. This technique is beneficial for saving water resources and for the clean utilization of coal.

关 键 词：dry coal beneficiation MODULARIZATION gas-solid fluidized bed wide-size-range medium-solids 

分 类 号：TD94[矿业工程—选矿]