Ultrafine coal cleaning using a centrifugal fluidized-bed separator

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32 Scopus citations


Ultrafine coal (nominal 150 × 44 μm) cleaning using a pilot-scale, centrifugal fluidized bed separator was investigated. The effects of the operating parameter values were evaluated and optimized to maximize mass recovery at a given product grade. Significant ash reductions were achieved from the cleaning of two coal sources having different cleaning characteristics. The concentrator provided a range of separation densities between 1.46RD to 2.18 RD with probable error (EP) values of around 0.25. Rougher-scavenger circuit simulations indicate that the process efficiencies can be improved significantly while achieving low density separations. E P values ranging from 0.17 to 0.20 were realized, while the organic efficiency increased by 20 absolute percentage points.

Original languageEnglish
Pages (from-to)1-18
Number of pages18
JournalCoal Preparation
Issue number1-2
StatePublished - Jan 2004

Bibliographical note

Funding Information:
The research work presented in this publication was funded by Kentucky Science and Engineering Foundation (Grant No. KSEF-148-502-02-14). The authors also acknowledge and greatly appreciate the significant contributions of Mr. Manish Jain of the University of Kentucky, Dr. Peter Bethel of Arch Coal, Mr. Dana Ball of Massey Energy, and Mr. Ishwinder Grewal of Knelson Concentrators.


  • Density-based separator
  • Empirical modeling
  • Enhanced gravity
  • Fine coal cleaning
  • Fluidized-bed separator
  • Process efficiency

ASJC Scopus subject areas

  • Fuel Technology
  • Geotechnical Engineering and Engineering Geology


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