Collision of a rising bubble-particle aggregate with a gas-liquid interface

Title: Collision of a rising bubble-particle aggregate with a gas-liquid interface
Creator: Ireland, Peter M.; Jameson, Graeme J.
Relation: International Journal of Mineral Processing Vol. 130, p. 1-7
Publisher Link: http://dx.doi.org/10.1016/j.minpro.2014.05.002
Publisher: Elsevier
Resource Type: journal article
Date: 2014
Description: In this paper we investigate the hypothesis that when bubbles carrying attached hydrophobic particles arrive at an air-liquid interface, the abrupt change in velocity is sufficient to dislodge attached particles, which fall back into the liquid. For the first time, experiments have demonstrated a case in which the particles do not detach, but move smoothly over the surface of the bubbles. The kinetic energy of arrival is dissipated by the motion of the particles through the liquid, as they move over the surface of the bubble while remaining attached. Some energy is also dissipated by the pulsations of the bubbles. The pulsations themselves do not lead to detachment of particles. A theory has been developed to explain the observed phenomena.
Subject: bubble; particles; aggregates; flotation
Identifier: http://hdl.handle.net/1959.13/1305906
Identifier: uon:21129
Identifier: ISSN:0301-7516
Language: eng
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