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Validation of the generalised Sutherland equation for bubble–particle encounter efficiency in flotation / Phong T. Nguyen in Minerals engineering, Vol. 22 N° 2 (Janvier 2009) 

Public ISBD [article]  in Minerals engineering > Vol. 22 N° 2 (Janvier 2009) . - pp. 176–181 Titre : Validation of the generalised Sutherland equation for bubble–particle encounter efficiency in flotation : Effect of particle density Type de document : texte imprimé Auteurs : Phong T. Nguyen, Auteur ; Anh V. Nguyen, Auteur Année de publication : 2009 Article en page(s) : pp. 176–181 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Flotation  bubble  Flotation  kinetics  Froth  flotation Index. décimale : 622 Industrie minière Résumé : Bubble–particle encounter interaction is the first step of the particle collection by rising air bubbles in flotation and has been predicted based on the potential flow condition by Sutherland and others, leading to the approximate generalised Sutherland equation (GSE). In this paper, the bubble–particle encounter interaction with the potential flow condition has been analysed by solving the full motion equation for the particle employing a numerical computational approach. Together with other inertial forces, the gravitational forces were fully included in the motion equation. The numerical results were compared with the GSE models for the encounter efficiency. The effect of particle density on the encounter interaction was very significant and could counterbalance the “negative” effect of the inertial forces on the particle interaction with air bubbles with a mobile surface under the potential flow condition. For the typical particle size range used in flotation, significant deviation of the Sutherland approximate models from the numerical results due to the particle density effect and gravitational forces was observed. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508001660 [article] Validation of the generalised Sutherland equation for bubble–particle encounter efficiency in flotation : Effect of particle density [texte imprimé] / Phong T. Nguyen, Auteur ; Anh V. Nguyen, Auteur . - 2009 . - pp. 176–181. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 22 N° 2 (Janvier 2009) . - pp. 176–181 Mots-clés : Flotation  bubble  Flotation  kinetics  Froth  flotation Index. décimale : 622 Industrie minière Résumé : Bubble–particle encounter interaction is the first step of the particle collection by rising air bubbles in flotation and has been predicted based on the potential flow condition by Sutherland and others, leading to the approximate generalised Sutherland equation (GSE). In this paper, the bubble–particle encounter interaction with the potential flow condition has been analysed by solving the full motion equation for the particle employing a numerical computational approach. Together with other inertial forces, the gravitational forces were fully included in the motion equation. The numerical results were compared with the GSE models for the encounter efficiency. The effect of particle density on the encounter interaction was very significant and could counterbalance the “negative” effect of the inertial forces on the particle interaction with air bubbles with a mobile surface under the potential flow condition. For the typical particle size range used in flotation, significant deviation of the Sutherland approximate models from the numerical results due to the particle density effect and gravitational forces was observed. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508001660