Dry beneficiation and cleaning of chinese high-ash coarse coal utilizing a dense-medium gas-solid fluidized bed separator

• Autorzy: He J. , Tan M. , Zhu R. , Luo Z.

Identyfikatory

DOI

10.5277/ppmp160212

• Języki publikacji: EN

Abstrakty

EN

Dry dense-medium fluidized bed separation provides a new alternative approach for coal beneficiation and cleaning. An indicator of segregation degree Sash was proposed to evaluate the stratified performance of coal samples by bed density. Fluidization stability of the bed was greatly enhanced by mixing a certain amount (21.53%) of fine magnetite powder (< 0.15 mm) into the fluidized media, which indicated a uniform density distribution as well as slight fluctuations in bed. It was found that the favorable density-segregation performance of 3–13 mm coarse coal occurred with a static bed height of 80 mm and a superficial gas velocity of 11.84 cm/s. The optimal segregation degree values of 0.67, 0.74 and 0.76 were obtained for 3–6, 6–10 and 10–13 mm coal samples, respectively. Low-ash clean coal with yields of 50.79, 56.83 and 61.24% were effectively acquired by the dry separation for various coal size fractions, respectively. Probable error values of 0.07, 0.055 and 0.05 g/cm3 were achieved, indicating good separation performance.

Słowa kluczowe

EN

coal cleaning; dense-medium fluidized bed; density distribution; segregation; separation performance

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2016
• Tom: Vol. 52, iss. 2
• Strony: 662--675
• Opis fizyczny: Bibliogr. 21 poz., rys., tab.

Twórcy

autor

He J.

• School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China
• Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, China University of Mining and Technology, Xuzhou 221116, China

autor

Tan M.

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

autor

Zhu R.

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

autor

Luo Z.

• Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, China University of Mining and Technology, Xuzhou 221116, China

Bibliografia

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