Particle size and frother effects in column flotation

S. M. Mehta, M. T. Ityokumbul

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Flotation experiments were carried out in a 76-mm- (3-in.-) diam, 3.55-m- (11.65-ft-) high column equipped with a Mott porous sparger. The variable studied included coal type, particle size, airflow rate and frother type. The column throughput was found to be a function of the airflow rate, frother type and feed size, and it was correlated to the Froude number. The Froude number exponent was found to be a function of frother type and feed size, but it was independent of the froth phase gas hold-up over the range 0.43 to 0.65. MIBC was determined to be a better frother for coal flotation than F-579. For a given frother, the gas velocity exponent for the course (70 × 100-mesh) feed was approximately one-half that of the fine (-100-mesh) feed. The use of wash water was also found to increase the dependence of the column carrying capacity on the gas velocity.

Original languageEnglish (US)
Pages (from-to)26-30
Number of pages5
JournalMinerals and Metallurgical Processing
Issue number1
StatePublished - Feb 2003

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Chemistry(all)
  • Geotechnical Engineering and Engineering Geology
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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