Ultrafine coal cleaning using spiral concentrators

R. Q. Honaker, M. Jain, B. K. Parekh, M. Saracoglu

Research output: Contribution to journalArticlepeer-review

47 Scopus citations


The conventional circuit fine coal circuit typically incorporates spiral concentrators to treat nominal 1 × 0.15 mm material. Pilot and in-plant studies have been performed to determine the operating parameter values needed to achieve optimum separation performances when extending the lower limit of a conventional spiral concentrator to 44 μm. Based on experimental and empirical data, a feed solids concentration of about 12% by weight is required with a feed rate of around 60 l/min per start. Under these conditions, 60% of the ash-forming minerals and 48% of the sulfur was rejected from the 210 × 44 μm size fraction of a given coal source.

Original languageEnglish
Pages (from-to)1315-1319
Number of pages5
JournalMinerals Engineering
Issue number14
StatePublished - Nov 2007


  • Coal
  • Fine particle processing
  • Gravity concentration
  • Process optimization

ASJC Scopus subject areas

  • Control and Systems Engineering
  • General Chemistry
  • Geotechnical Engineering and Engineering Geology
  • Mechanical Engineering


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