Effect of humidity on dynamic foam stability

Title: Effect of humidity on dynamic foam stability
Creator: Li, Xueliang; Shaw, Ryan; Stevenson, Paul
Relation: International Journal of Mineral Processing Vol. 94, Issue 1-2, p. 14-19
Publisher Link: http://dx.doi.org/10.1016/j.minpro.2009.10.002
Publisher: Elsevier
Resource Type: journal article
Date: 2010
Description: It is experimentally shown that the stability of non-overflowing pneumatic foams, such as those used in the Bikerman foam stability test, is strongly dependent upon the gradient of humidity within the freeboard of the column. Growing foams can be prevented from exhibiting collapse, even at surfactant concentrations significantly lower than the critical micelle concentration, by saturating the air above the foam surface thereby preventing liquid evaporation. These observations have important implications for the performance of flotation devices, as well as instruments designed to measure the stability of aqueous foams. Meteorological data for two mining sites in Australia throughout a single year shows the variability of humidity, and therefore stability, of flotation froths.
Subject: flotation; foam stability; relative humidity; evaporation
Identifier: http://hdl.handle.net/1959.13/927788
Identifier: uon:10248
Identifier: ISSN:0301-7516
Language: eng
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