Dynamic froth stability in froth flotation

N. Barbian, E. Ventura-Medina, J.J. Cilliers

Research output: Contribution to journalArticle

69 Citations (Scopus)

Abstract

A new measure for froth stability is introduced in this work, based on a dynamic stability test for non-overflowing froth columns. The dynamic stability factor represents the lifetime of a bubble in the froth, and is defined as the ratio of the total volume of froth at equilibrium to the volumetric gas rate introduced into the system. Experiments have been carried out at laboratory scale to measure the dynamic stability factor under different operating conditions. Air flowrate and frother concentration were the key operating variables. It was found that the equilibrium height and the dynamic stability factor depend significantly upon both the air flowrate and the frother concentration. Also, the dynamic stability factor and the fraction of air overflowing as unbroken bubbles in batch flotation tests were related and can be used to establish a stability criteria. These measurements will also allow a clearer quantitative link to be formed between froth stability with froth structure and flotation performance.
Original languageEnglish
Pages (from-to)1111-1116
Number of pages6
JournalMinerals Engineering
Volume16
Issue number11
Early online date20 Oct 2003
DOIs
Publication statusPublished - Nov 2003

Keywords

  • froth flotation
  • flotation bubbles
  • flotation froths
  • process instrumentation

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