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Effect of ultrasound on separation selectivity and efficiency of flotation / Emin Cafer Cilek in Minerals engineering, Vol. 22 N° 14 (Novembre 2009) 

Public ISBD [article]  in Minerals engineering > Vol. 22 N° 14 (Novembre 2009) . - pp. 1209–1217 Titre : Effect of ultrasound on separation selectivity and efficiency of flotation Type de document : texte imprimé Auteurs : Emin Cafer Cilek, Auteur ; Selcuk Ozgen, Auteur Année de publication : 2009 Article en page(s) : pp. 1209–1217 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Flotation  froths  Flotation  kinetics  Sulphide  ores Résumé : The effect of the use of ultrasound in the froth phase on the flotation performance has been investigated in relation to the flotation rate of a complex sulphide ore. A series of kinetic flotation tests with and without ultrasound were conducted in a flotation machine with a 2-L cell, in which an ultrasonic probe is located in the froth zone. The results indicate that there is a considerable effect of ultrasound on separation selectivity and efficiency in the flotation of a complex sulphide ore at intermediate and high level airflow rates whereas, no significant differences in the separation performance were obtained from the flotation with and without ultrasound at low airflow rates. In addition, the results of the size-by-size analysis show that a much better cleaning action in the froth was promoted for coarse particles rather than fine particles as a result of the use of ultrasound. As a result of increase in the bubble coalescence, it was found that the use of ultrasound in the froth is more effective at shallow froths. Therefore, either effective pulp volume can be increased with a negligible loss of flotation performance or the pulp density can be decreased to obtain better product quality with the use of ultrasound in shallow froths. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S089268750900154X [article] Effect of ultrasound on separation selectivity and efficiency of flotation [texte imprimé] / Emin Cafer Cilek, Auteur ; Selcuk Ozgen, Auteur . - 2009 . - pp. 1209–1217. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 22 N° 14 (Novembre 2009) . - pp. 1209–1217 Mots-clés : Flotation  froths  Flotation  kinetics  Sulphide  ores Résumé : The effect of the use of ultrasound in the froth phase on the flotation performance has been investigated in relation to the flotation rate of a complex sulphide ore. A series of kinetic flotation tests with and without ultrasound were conducted in a flotation machine with a 2-L cell, in which an ultrasonic probe is located in the froth zone. The results indicate that there is a considerable effect of ultrasound on separation selectivity and efficiency in the flotation of a complex sulphide ore at intermediate and high level airflow rates whereas, no significant differences in the separation performance were obtained from the flotation with and without ultrasound at low airflow rates. In addition, the results of the size-by-size analysis show that a much better cleaning action in the froth was promoted for coarse particles rather than fine particles as a result of the use of ultrasound. As a result of increase in the bubble coalescence, it was found that the use of ultrasound in the froth is more effective at shallow froths. Therefore, either effective pulp volume can be increased with a negligible loss of flotation performance or the pulp density can be decreased to obtain better product quality with the use of ultrasound in shallow froths. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S089268750900154X