Froth imaging, air recovery and bubble loading to describe flotation bank performance

An acoustic technique for measurement of bubble solids mass loading – (a) Fundamental study of single bubble

“…Video image analysis and direct sampling of the froth surface have also been combined to measure the bubble solids loading in the froth phase (Barbian et al, 2007;Sadr-Kazemi and Cilliers, 2000;Ventura-Medina et al, 2004). This technique uses a microscope glass to sample the curved surface of a single bubble, with calculation of the bubble solids loading as the amount of solids on the slide over the surface area of the bubble.…”

Modification of ilmenite surface chemistry for enhancing surfactants adsorption and bubble attachment

“…Studies on froth flotation have been focused on developing techniques to selectively modify mineral surface chemistry to improve the hydrophobicity and the attachment of particles to air bubbles [8][9][10][11][12][13][14][15], and on investigating the effect of bubble sizes [16,17] and hydrodynamic interaction [18,19], etc. The typical opinion is that the poor ability is due to the reduced particle hydrophobicity and hence less probability of particle/air attachment [20,21].…”

Estimation of air recovery by measuring froth transport over the lip in a bi-dimensional flotation cell

“…The froth stability has been quantified by air recovery, i.e., the fraction of air entering the flotation equipment that overflows the cell lip as unburst bubbles. Barbian et al (2007), Hadler et al (2010) have reported air recovery estimations from the froth height over the lip launder (h lip ), the froth air hold-up (e gf ) and measurements of froth surface velocity (at the top of the froth) close to the discharge (v f ). Surface velocity estimations on the top of the froth have been successfully obtained by vision systems to characterise the flotation froth.…”