A. Nguyenvan et S. Kmet, PROBABILITY OF COLLISION BETWEEN PARTICLES AND BUBBLES IN FLOTATION -THE THEORETICAL INERTIALESS MODEL INVOLVING A SWARM OF BUBBLES IN PULP PHASE, International journal of mineral processing, 40(3-4), 1994, pp. 155-169
Citations number
19
Categorie Soggetti
Mineralogy,"Metallurgy & Mining","Engineering, Chemical
The collision interaction between particles and air bubbles in the flo
tation pulp phase has been analyzed. The inertial effects on the parti
cle-bubble collision probability are ignored (inertialess model). Spec
ial attention has been paid to the influence of a swarm of bubbles on
the water velocity near the bubble surface. The approximation for wate
r radial velocity near the bubble surface permits derivation of an exp
ression for both collision probability and collision angle as a functi
on, besides others, of gas holdup. This provides useful information fo
r further understanding the particle collection (collision, sliding an
d adhesion) process in flotation. The model is for gas holdup in the r
ange 0 less-than-or-equal-to epsilon less-than-or-equal-to 0.30, for b
ubble Reynolds number up to 500 and for a ratio of particle size to bu
bble size D(p)/D(b) much less than 1.