NDLI: Imaging study of surfactant effect on bubble behaviors in froth flotation

Content Provider	IEEE Xplore Digital Library
Author	Liu Yan-Yan Li Yan-Peng Zhu Ting-Ting Yang Ge Ruan Xiao-Dong
Copyright Year	2011
Description	Author affiliation: Alliant Energy, Madison, WI, USA (Yang Ge) \|\| State Key Lab. of Fluid Power & Mechatron. Syst., Zhejiang Univ., Hangzhou, China (Ruan Xiao-Dong) \|\| Sch. of Environ. Sci. & Eng., Chang'an Univ., Xi'an, China (Liu Yan-Yan; Li Yan-Peng; Zhu Ting-Ting)
Abstract	Bubble motion is fundamental to the performance of flotation system, but single bubble motion under flotation-related conditions is a relatively neglected research field. The objective of this study is to characterize the behaviors of single bubbles with 2 ~ 5 millimeter in diameter in the presence of surfactant. Experiments were carried out to investigate the effect of surfactant on trajectory, shape and velocity of single bubbles rising in liquid. Distilled water and Triton X-100 solutions with various concentrations were chosen as liquid phases. The motion of single bubbles was recorded using high-speed camera in a laboratory scale flotation column. Trajectory, shape and velocity of single bubbles were then determined using the image process technique. The results clearly show that bubble trajectory takes more regular pattern in Triton X-100 solution than in pure water. It is also found that the right amount of surfactant used here can dampen bubble deformation, reduce shape oscillation amplitude and slow down the bubble rising velocity significantly due to the Marangoni effect. Compared to pure water, Triton X-100 of concentration $0.15×10^{-3}$ mol/L reduces the oscillation amplitude of the aspect ratio of the bubble by 57% while Triton X-100 of concentration $0.05×10^{-3}$ mol/L slows the terminal velocity of the bubble by 35%.
Starting Page	1199
Ending Page	1202
File Size	326042
Page Count	4
File Format	PDF
ISBN	9781612843391
e-ISBN	9781612843407
DOI	10.1109/ISWREP.2011.5893230
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-05-20
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Flotation Bubble Shape Surface contamination High-speed camera Cameras Trajectory Minerals Acceleration Surfactant Oscillators
Content Type	Text
Resource Type	Article

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