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Fuel v.212, 2018년, pp.566 - 575   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Process optimization for arsenic removal of fine coal in vibrated dense medium fluidized bed

Zhou, Enhui (Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, China University of Mining & Technology, 221116 Xuzhou, China ) ; Fan, Xuchen (Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, China University of Mining & Technology, 221116 Xuzhou, China ) ; Dong, Liang (Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, China University of Mining & Technology, 221116 Xuzhou, China ) ; Zhao, Yuemin (Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, China University of Mining & Technology, 221116 Xuzhou, China ) ; Yang, Xuliang (Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, China University of Mining & Technology, 221116 Xuzhou, China ) ; Duan, Chenlong (Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, China University of Mining & Technology, 221116 Xuzhou, China ) ; Liu, Qingxia (Department of Chemical & Materials Engineering, University of Alberta, 9107-116 Street, Edmonton, AB ) ;
  • 초록  

    Abstract The dry separation of fine coal provides a feasible, low-cost and pollution-free method for the pre-arsenic removal from coal prior to combustion. In this study, the arsenic (As) occurrence of the coal from Wangjiazhai coal mine in China and the corresponding migration law in the dissociation process were investigated. Accordingly, it was proposed for the vibrated dense medium fluidized bed (VDMFB) to be utilized, where it was suitable to separate the fine coal for As removal. The fluidization characteristics and the improvement of fluidization quality under the collaborative effect of vibration amplitude ( A ), vibration frequency ( f ) and air velocity ( U a ) were also explored. It was discovered that the fluidized bed density was uniform and beneficial to separate coal through settling velocity when the fluidization number, N v , was 1.0–1.83 with A of 0.5–3 mm and f of 5–30 Hz. Moreover, the bed density was driven to periodically fluctuate in a low range, based on the periodic vibration energy input in the bed. Furthermore, thirteen separation experiments for fine coal with various parameter combinations were executed through the Box-Behnken RSM method. The results demonstrated that the three operation parameters importance on the segregation degree of As content ( S As ) was as follows: vibration amplitude > air velocity > vibration frequency. Compared to raw coal, the As content of the clean coal was reduced by 81.06%, whereas a 90.29% of As was concentrated into the tailing, indicating that the VDMFB can achieve a satisfactory performance for the dry arsenic removal in coal. Highlights A pollution-free dry arsenic removal method from coal prior to combustion was proposed. The collaborative effect of vibration amplitude, frequency and air velocity were studied. The feasibility of separation for easily mismatched particles was explored. 90.29% of arsenic in raw coal was concentrated into the tailing product.


  • 주제어

    Fine coal .   Arsenic removal .   Fluidization quality .   Vibrated dense medium fluidized bed.  

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