Improving separation efficiency of 6-1 mm coal by introducing vibration energy to dense medium gas-solid fluidized bed

• Autorzy: He J. , Zhao Y. , Luo Z. , Zhao J. , Duan C. , He Y.

Identyfikatory

DOI

10.5277/ppmp150109

• Języki publikacji: EN

Abstrakty

EN

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 0.3-0.074 mm was utilized as the basic medium solids. 6-1 mm 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 the fluidization stability and the density distribution uniformity. Comparing with the bed without vibration, the optimal SP and Sρ values of 0.034 kPa and 0.018 g/cm3 are acquired in vibration bed with the operating factors of A = 1 mm, U = 1.8Umf, f = 15 Hz and Hs = 150 mm. The coal ash content was reduced from 27.84% to 9.50% at a separating density of 1.68 g/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 6-1 mm fine coal in the arid and water-shortage areas.

Słowa kluczowe

EN

vibration energy; dense medium gas-solid fluidized bed; fluidization quality; density uniformity; separation efficiency

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2015
• Tom: Vol. 51, iss. 1
• Strony: 95--108
• Opis fizyczny: Bibliogr. 25 poz., rys., tab.

Twórcy

autor

He J.

• School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China

autor

Zhao Y.

• School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China

autor

Luo Z.

• School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China

autor

Zhao J.

• School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China

autor

Duan C.

• School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China

autor

He Y.

• School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China

Bibliografia

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