Parametric evaluation of a dense-medium process using an enhanced gravity separator

R. Q. Honaker, D. P. Patil

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Dense-medium separators have proven to be the most efficient processes for removing the undesirable gangue material from run-of-mine coal. A test program has been conducted to evaluate the parametric effects on a magnetite-based dense-medium application in an enhanced gravity separator (EGS), which mechanically generates an enhanced gravity field. Optimization using empirical models developed utilizing data obtained from a statistically designed test program revealed that a complex manipulation of the medium density, bowl speed, and underflow tailings rate is needed to achieve maximum mass recovery over a range of clean coal ash contents. Subsequent experimental results validated the optimum performances predicted from the empirical models. Organic efficiency values greater than 95% were obtained over a wide range of product ash contents for the treatment of a 1000 × 45 micron coal sample.

Original languageEnglish
Pages (from-to)1-17
Number of pages17
JournalCoal Preparation
Issue number1
StatePublished - Jan 2002

Bibliographical note

Funding Information:
Received 23 February 2001; accepted 20 July 2001. Project 59974030 supported by National Natural Science Foundation of China. Address correspondence to Luo Zhenfu, Mineral Processing Engineering Research Center, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu Province 221008, People’s Republic of China. E-mail:


  • Centrifugal
  • Dense-medium
  • Fine coal
  • Gravity separation
  • Optimization

ASJC Scopus subject areas

  • Fuel Technology
  • Geotechnical Engineering and Engineering Geology


Dive into the research topics of 'Parametric evaluation of a dense-medium process using an enhanced gravity separator'. Together they form a unique fingerprint.

Cite this