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Role of Frothers in Bubble Generation and Coalescence in a Mechanical Flotation Cell
Author(s) -
Grau Rodrigo A.,
Laskowski Janusz S.
Publication year - 2006
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450840204
Subject(s) - coalescence (physics) , bubble , chemistry , thermodynamics , physics , mechanics , astrobiology
Abstract Two frothers covering a very broad range from weak and selective (DF‐200) to powerful (DF‐1012) flotation performance were chosen to test the effect of frothers on bubble generation and bubble coalescence in a laboratory scale flotation cell. In two‐phase, gas‐liquid systems, the experiments showed that the frothers affect both the bubble breaking process and the coalescence of bubbles. While the DF‐200 frother, characterized by much larger critical coalescence concentration (CCC) values than DF‐1012, has the ability to produce finer bubbles at concentrations exceeding the CCC value, the bubbles generated in the DF‐1012 solutions at concentrations exceeding CCC are much larger.