Transport phenomena at the pulp-froth interface in a flotation column: II. Detachment
Date
2004
Authors
Van Deventer J.S.J.
Feng D.
Burger A.J.
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
An apparent detachment rate (ADR) of a species is defined as the difference between the bubble transport of the species directly below the pulp-froth interface and its corresponding final transfer into the concentrate. The ADR shows a definite relationship with the superficial velocity of water below the pulp-froth interface, the surface area/mass ratio of particles, as well as the floatability (hydrophobicity) of particles. An empirical relationship is proposed whereby the percentage apparent detachment (PAD) of a species can be predicted from these parameters. The PAD decreases with an increase in the upward superficial velocity of water, while a decrease in the floatability of particles (especially those with low area/mass ratios) results in an increase of the PAD. It is expected that the empirical model for the estimation of PAD could be useful to assist in the general assessment of flotation conditions in other applications. © 2003 Elsevier B.V. All rights reserved.
Description
Keywords
Chemical pulp, Concentration (process), Distillation columns, Hydrophobicity, Interfaces (materials), Mass transfer, Particle size analysis, Silica, Bubble loads, Column flotation, Detachment, Interstitial concentration, Pulp-froth interfaces, Froth flotation, Chemical Pulps, Columns, Concentration, Foam, Interfaces, Particle Size, Silica, Water Repellence
Citation
International Journal of Mineral Processing
74
04-Jan
74
04-Jan