Transport phenomena at the pulp-froth interface in a flotation column: II. Detachment

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dc.contributor.authorVan Deventer J.S.J.
dc.contributor.authorFeng D.
dc.contributor.authorBurger A.J.
dc.date.accessioned2011-05-15T16:01:50Z
dc.date.available2011-05-15T16:01:50Z
dc.date.issued2004
dc.description.abstractAn 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.
dc.description.versionArticle
dc.identifier.citationInternational Journal of Mineral Processing
dc.identifier.citation74
dc.identifier.citation04-Jan
dc.identifier.issn3017516
dc.identifier.other10.1016/j.minpro.2003.11.002
dc.identifier.urihttp://hdl.handle.net/10019.1/12174
dc.subjectChemical pulp
dc.subjectConcentration (process)
dc.subjectDistillation columns
dc.subjectHydrophobicity
dc.subjectInterfaces (materials)
dc.subjectMass transfer
dc.subjectParticle size analysis
dc.subjectSilica
dc.subjectBubble loads
dc.subjectColumn flotation
dc.subjectDetachment
dc.subjectInterstitial concentration
dc.subjectPulp-froth interfaces
dc.subjectFroth flotation
dc.subjectChemical Pulps
dc.subjectColumns
dc.subjectConcentration
dc.subjectFoam
dc.subjectInterfaces
dc.subjectParticle Size
dc.subjectSilica
dc.subjectWater Repellence
dc.titleTransport phenomena at the pulp-froth interface in a flotation column: II. Detachment
dc.typeArticle
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