Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/65389
Type: Conference paper
Title: A Study of Detachment of Model Coarse Particles from Bubbles Using a Novel Electro-Acoustic Technique
Author: Xu, D.
Ametov, I.
Grano, S.
Citation: Engineering Our Future: Are We up to the Challenge? 27 - 30 September 2009, Burswood Entertainment Complex, 2009: pp.776-785
Publisher: Engineers Australia
Publisher Place: Australia
Issue Date: 2009
ISBN: 9780858259225
Conference Name: CHEMECA (37th : 2009 : Perth, Australia)
Organisation: Institute for Mineral and Energy Resources
Statement of
Responsibility: 
D. Xu, I. Ametov, S. R. Grano
Abstract: In this paper, a detachment of particles from bubbles was investigated using a novel electro-acoustic technique. The experimental setup consisted of a loudspeaker connected to a computer through an amplifier. A teflon capillary tube was attached to the membrane of a loudspeaker. A bubble-particle aggregate on the other end of the capillary tube was subjected to vibration when the sinusoidal signal of fixed frequency and amplitude generated by the computer was transmitted to the loudspeaker. The critical amplitude of particle detachment was determined at a fixed frequency (50 Hz). The detachment experiments were conducted using model quartz particles of various size and hydrophobicity. Results showed that particles (600-850 m) with high contact angle (90 degree) required high amplitudes for detachment from bubbles. In contrast, quartz particles with low contact angle (49 degree) exhibited the considerably lower critical detachment amplitude. The critical detachment amplitude was related to the stability of bubble-particle aggregates. The results of electro-acoustic experiments correlated well with the outcomes of corresponding bench flotation tests.
Keywords: coarse particle flotation; bubble-particle detachment; stability of bubble-particle aggregates
Rights: Copyright status unknown
RMID: 0020109304
Appears in Collections:Institute for Mineral and Energy Resources publications

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