IMPROVING THE SEPARATION EFFICIENCY OF 6-1MM COAL BY INTRODUCING VIBRATION ENERGY TO DENSE MEDIUM GAS-SOLID FLUIDIZED BED
Jingfeng HE 1  
,   Yuemin ZHAO 1,   Zhenfu LUO 1,   Jie ZHAO 1,   Chenlong DUAN 1,   Yaqun HE 1
 
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School of Chemical Engineering and Technology, China University of Mining and Technology
CORRESPONDING AUTHOR
Jingfeng HE   

School of Chemical Engineering and Technology, China University of Mining and Technology, Daxue Street No.1, Quanshan District, 221116 Xuzhou, China
Publication date: 2015-01-01
 
Physicochem. Probl. Miner. Process. 2015;51(1):95–108
 
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ABSTRACT
Effects of the vibration energy on the fluidization quality and separation performance of dense medium gas-solid fluidized bed were investigated experimentally. The magnetite powder with a wide size range of 0.3-0.074mm was utilized as the basic medium solids. 6-1mm fine coal sample from Yongcheng (China) was used to perform the separation experiments. The results indicate that the vibration amplitude A and superficial gas velocity U are greatly significant to fluidization stability and density distribution uniformity. Comparing with the bed without vibration, the optimal SP and Sρ values of 0.034Kpa and 0.018g/cm3 are acquired in vibration bed with the operating factors of A=1mm, U=1.8Umf, f=15Hz and Hs=150mm. The coal ash content was reduced from 27.84% to 9.50% at a separating density of 1.68g/cm3 with a probable error E value of 0.505. The separation efficiency of 6-1mm fine coal is effectively improved by introducing vibration energy to dense medium gas-solid fluidized bed. The technology provides a novel approach to achieve high-efficiency separation of 6-1mm fine coal in the arid and water-shortage areas.
eISSN:2084-4735
ISSN:1643-1049