Effect of negative inertial forces on bubble-particle collision via implementation of Schulze collision efficiency in general flotation rate constant equation

2017 ◽  
Vol 517 ◽  
pp. 72-83 ◽  
Author(s):  
Sabri Kouachi ◽  
Behzad Vaziri Hassas ◽  
Ahmad Hassanzadeh ◽  
Mehmet Sabri Çelik ◽  
Mustapha Bouhenguel
Keyword(s):  
Rate Constant ◽  
Particle Collision ◽  
Inertial Forces ◽  
Collision Efficiency ◽  
Flotation Rate

Fall-off shape and incubation times in weak-collision thermal unimolecular reactions

1984 ◽  
Vol 62 (1) ◽  
pp. 157-161 ◽  
Author(s):  
H. O. Pritchard
Keyword(s):  
Rate Constant ◽  
Collision Efficiency ◽  
Unimolecular Reactions ◽  
Thermal Reactions ◽  
Efficiency Factors ◽  
New Formula ◽  
Relaxation Structure

A new formula for the weak-collision unimolecular rate constant is readily interpretable in terms of bottleneck concepts. This formula is used to explore the correlation between variations in relaxation structure and fall-off shape in weak-collision thermal unimolecular reactions; some information is also presented relating to collision efficiency factors βc, and to incubation times.It is conjectured that randomisation failure is an important feature which causes near-Lindemann behaviour to occur in practical weak-collision thermal reactions.

Calculation of the flotation rate constant of chalcopyrite particles in an ore

2003 ◽  
Vol 72 (1-4) ◽  
pp. 227-237 ◽  
Author(s):  
J. Duan ◽  
D. Fornasiero ◽  
J. Ralston
Keyword(s):  
Rate Constant ◽  
Flotation Rate

Effect of turbulence dispersion on bubble-particle collision efficiency

2022 ◽  
Vol 177 ◽  
pp. 107374
Author(s):  
Ai Wang ◽  
Mohammad Mainul Hoque ◽  
Geoffrey Evans ◽  
Subhasish Mitra
Keyword(s):  
Particle Collision ◽  
Collision Efficiency ◽  
Turbulence Dispersion

scholarly journals Effect of Bubble Surface Properties on Bubble–Particle Collision Efficiency in Froth Flotation

Minerals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 367 ◽  
Author(s):  
Shuofu Li ◽  
Kou Jue ◽  
Chunbao Sun
Keyword(s):  
Surface Properties ◽  
Froth Flotation ◽  
Surfactant Solution ◽  
Terminal Velocity ◽  
Bubble Surface ◽  
Particle Collision ◽  
Film Rupture ◽  
Collision Efficiency ◽  
Mineral Particles ◽  
Bubble Collision

In research on the particle–bubble collision process, due to the adsorption of surfactants and impurities (such as mineral particles, slime, etc.), most studies consider the bubble surface environment to be immobile. However, in the real situation of froth flotation, the nature of the bubble surface (degree of slip) is unknown. Mobile surface bubbles increase the critical thickness of the hydration film rupture between particles and bubbles, and enhance the collision between particles and bubbles. Sam (1996) showed that when the diameter of the bubble is large enough, a part of the surface of the bubble can be transformed into a mobile state. When the bubble rises in a surfactant solution, the surface pollutants are swept to the end of the bubble, so when the bubble reaches terminal velocity, the upper surface of the bubble is changed into a mobile surface. This paper analyzes the collision efficiency and fluid flow pattern of bubbles with mobile and immobile surfaces, and expounds the influence of surface properties on collision efficiency.

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