Influence of Bubble Approach Velocity on Liquid Film Drainage between a Bubble and a Spherical Particle
The flotation process strongly depends on drainage of liquid film between a bubble and a particle which might be influenced by hydrodynamic conditions in a flotation cell. This technical note investigates the influence of bubble approach velocity on the liquid drainage process between a bubble and a particle under constant conditions. It was found that the increase in bubble approach velocity results in a higher critical thickness of the wetting liquid film. The results also showed that the rupture of the films was affected more strongly by electrostatic double layer forces than hydrophobic forces. Hydrophobic forces were more pronounced at high bubble approach velocities. This work shows that hydrodynamic conditions should not be neglected when investigating liquid film drainage process.
B. Albijanic et al., "Influence of Bubble Approach Velocity on Liquid Film Drainage between a Bubble and a Spherical Particle," Powder Technology, vol. 338, pp. 140-144, Elsevier, Oct 2018.
The definitive version is available at https://doi.org/10.1016/j.powtec.2018.07.010
Mining and Nuclear Engineering
Keywords and Phrases
Flotation; Hydrodynamics; Hydrophobicity; Liquid films; Velocity; Wetting; Approach velocities; Constant conditions; Critical thickness; Electrostatic double layer force; Film drainage process; Hydrodynamic conditions; Spherical particle; Wetting liquid films; Froth flotation; Article; Bubble; Calculation; Capillary pressure; Controlled study; Critical film thickness; Flotation; Hydrodynamics; Hydrophobicity; Material state; Mathematical computing; Particle size; Physical parameters; Surface property; Velocity; Zeta potential
International Standard Serial Number (ISSN)
Article - Journal
© 2018 Elsevier, All rights reserved.
01 Oct 2018