Maximum gas velocity in column flotation

M. T. Ityokumbul

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


Flotation is a surface-based separation process whose rate depends on the availability of bubble surface. The flotation column operational parameter controlling the availability of bubble surface is the gas velocity which emerges as a key design and scale-up parameter. The optimum gas velocity for column flotation has been identified to be in the bubbly flow regime [1,2]. By using dimensional analysis, it is shown here that the maximum gas velocity for the existence of bubbly flow conditions in flotation columns is given by Ug,max = 0.11Dc0.5. It is shown that all large diameter flotation columns are being operated in the bubbly flow regime but at gas velocities lower than 50% of the maximum predicted values.

Original languageEnglish (US)
Pages (from-to)1279-1286
Number of pages8
JournalMinerals Engineering
Issue number12
StatePublished - Dec 1993

All Science Journal Classification (ASJC) codes

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


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