A study of bubble size evolution in Jameson flotation cell

2018 ◽  
Vol 137 ◽  
pp. 461-466 ◽  
Author(s):  
Hongzheng Zhu ◽  
Alejandro López Valdivieso ◽  
Jinbo Zhu ◽  
Shaoxian Song ◽  
Fanfei Min ◽  
...  
Keyword(s):  
Bubble Size ◽  
Size Evolution ◽  
Flotation Cell

Stabilization of bubble size in a flotation cell

1998 ◽  
Vol 34 (3) ◽  
pp. 272-277 ◽  
Author(s):  
S. A. Kondrat'ev ◽  
G. R. Bochkarev
Keyword(s):  
Bubble Size ◽  
Flotation Cell

Bubble size as a function of impeller speed in a self-aeration laboratory flotation cell

2006 ◽  
Vol 19 (2) ◽  
pp. 201-203 ◽  
Author(s):  
E.H. Girgin ◽  
S. Do ◽  
C.O. Gomez ◽  
J.A. Finch
Keyword(s):  
Bubble Size ◽  
Impeller Speed ◽  
Flotation Cell

Micro- and nano-scale phenomena effect on bubble size in mechanical flotation cell

2015 ◽  
Vol 70 ◽  
pp. 109-118 ◽  
Author(s):  
Z. Jávor ◽  
N. Schreithofer ◽  
K. Heiskanen
Keyword(s):  
Bubble Size ◽  
Nano Scale ◽  
Flotation Cell

Air Bubble Size Measurement in a Laboratory Flotation Cell

2014 ◽  
Vol 530-531 ◽  
pp. 160-165
Author(s):  
Xiao Feng Xie ◽  
Rong Gang Li
Keyword(s):  
Porous Media ◽  
Image Analysis ◽  
Flow Rate ◽  
Bubble Size ◽  
Air Flow ◽  
Bubble Surface ◽  
Gas Holdup ◽  
Air Flow Rate ◽  
Air Bubble ◽  
Flotation Cell

Air bubble size distribution in a laboratory flotation cell was investigated by using of image analysis technology in this paper. Results showed that it was feasible to determine the air bubble size according to image analysis software. For a porous media-aerated flotation cell, bubble size was dependent on poles size of porous media. Furthermore, operating parameters of the cell could affect the size. Mean bubble diameters increased with increasing of air flow rate. In contrast, it decreased when adding deinking agent. Its decreasing with increasing pulp flow rate under given conditions illustrated the fact that proper turbulence strength at the inlet of air bubbles was favorable for reducing bubble size. Gas holdup increased with increasing air flow rate to some extent, but it had a peak value. Gas holdup would rise obviously when deinking agent existed. An efficient approach to enhancing bubble surface area flux was to increase air flow rate and keep small bubble size at the same time.

scholarly journals Optimization of Nanobubble-Assisted Bunker Oil Flotation from Oil-Wet Sand via Response Surface Methodology (RSM)

2015 ◽  
Vol 15 (1) ◽  
pp. 1
Author(s):  
Lim Mee Wei ◽  
Lau Ee Von ◽  
Poh Phaik Eong
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Bubble Size ◽  
Test Results ◽  
Oil Sand ◽  
Flotation Process ◽  
Optimum Parameters ◽  
Flotation Cell ◽  
Hydrophobic Particles ◽  
Bunker Oil

Flotation technology is an effective method for the separation of oil from sand via gas-liquid-solid system. The mechanism of flotation lies in the generation of gas bubble that attaches itself to the hydrophobic particles. Therefore, one of the main parameters which could affect the efficiency of flotation is the bubble size distribution. This research aims to investigate the efficiency of nanobubbles (NBs) in the flotation process to remove high density bunker oil from oil/sand slurry in a laboratory-scale flotation cell. Experiments were carried out using NBs (approximate diameter of 200 nm) generated via ultrasonication for the flotation studies. In this investigation, four different variables including amplitude (sonication power), pH, duration of sonication (min) and input flowrate of NBs (ml/s) were studied. The second order response function was used for obtaining flotation efficiency, and was further optimized using response surface methodology (RSM) to maximize flotation efficiency within the experimentally studied range. The optimum parameters were found to be, 70% amplitude, pH 12, 10 min of flotation and an input flowrate of 57 ml/s to achieve the predicted maximum flotation efficiency of 19.83%. This was in agreement to the experimental results which show an optimum flotation efficiency of 19.98%. The test results indicated that the use of NBs alone provided unsatisfactory flotation. Even though NBs (larger surface area) are expected to increase the bubble-particle attachment and decrease the detachment probabilities, the low buoyancy/low rising velocity of NBs prevents efficient flotation despite the advantages they have. Future studies would include the optimization of bubble size to improve the flotation efficiency

scholarly journals Bubble Size Distribution Characteristics of a Jet-Stirring Coupling Flotation Device

Minerals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 369 ◽  
Author(s):  
Youli Han ◽  
Jinbo Zhu ◽  
Liang Shen ◽  
Wei Zhou ◽  
Yunjia Ling ◽  
...  
Keyword(s):  
Size Distribution ◽  
Bubble Size ◽  
High Speed ◽  
Bubble Size Distribution ◽  
Sampling Location ◽  
Flotation Column ◽  
Flotation Cell ◽  
Positive Linear Correlation ◽  
Feeding Pressure ◽  
Pressure Suction

In this study, a new jet-stirring coupling flotation device that incorporates the advantages of three conventional flotation machines (specifically, Jameson cell, mechanical flotation cell, flotation column) was designed based on jet suction. The suction capacity of a double cosine self-aspirated nozzle utilized by the device was analyzed under different feeding pressures, and the effects of frother concentration, feeding pressure, suction capacity, and height of sampling location on the bubble size distribution (BSD) were investigated using a high-speed video system. It was found that a large amount of air was sucked into the flotation cell by the self-aspirated nozzle arranged in a non-submerged manner, which met the requirements of flotation in terms of the suction amount of air. The suction capacity showed a positive linear correlation with negative pressure inside the nozzle. When the Methyl isobutyl carbinol (MIBC) concentration reached the critical coalescence concentration (CCC), the bubble size stabilized at approximately 0.31 mm, which was smaller than the bubble size produced by the conventional flotation machine. This indicated that bubbles suitable for flotation were generated. D32 linearly decreased with increasing of feeding pressures and conversely increased with increasing suction capacities and sampling location heights, independent of the frother concentration.

scholarly journals Bubble-Size Evolution during Polyurethane Foam Expansion.

2016 ◽  
Author(s):  
Lisa Ann Mondy ◽  
Christine Cardinal Roberts ◽  
Grant Soehnel ◽  
Casper Brady ◽  
Bion Shelden ◽  
...  
Keyword(s):  
Polyurethane Foam ◽  
Bubble Size ◽  
Foam Expansion ◽  
Size Evolution
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