Development and evaluation of the CAVEX dense medium cyclone

Rick Honaker, Robert Hollis, Debra Switzer, Tom Coker

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


The CAVEX dense medium cyclone (DMC) was developed in the later part of the 1990s as a result of the expertise developed by Weir engineers in slurry pumping. The inlet area of the cyclone is designed to minimize turbulence and to reduce wear at the feed entry point, which provides more energy for particle separation at a given feed pressure. A parametric study was performed on a 150mm diameter unit to quantify separation efficiency as a function of feed pressure, apex diameter, medium density, and cone angle. The added energy in the cyclone was confirmed by comparing the stability of the medium in the CAVEX unit with that provided by a common commercial unit having the same dimensions. A 500mm unit was installed in parallel with an identically sized industrial unit in an operating preparation plant treating 12 × 1 mm coal. The separation efficiency values achieved by the CAVEX DMC were found to be higher than those obtained by the standard industrial unit and the amount of improvement increased with a decrease in particle size. The data from the pilot-scale and in-plant tests are presented and discussed in this article.

Original languageEnglish
Pages (from-to)100-112
Number of pages13
JournalInternational Journal of Coal Preparation and Utilization
Issue number2-5
StatePublished - Mar 2010


  • Dense medium cyclone
  • Parametric study
  • Pilot-scale testing

ASJC Scopus subject areas

  • Chemical Engineering (all)
  • Fuel Technology
  • Geotechnical Engineering and Engineering Geology
  • Energy Engineering and Power Technology
  • Mechanical Engineering


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