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Bubble size distribution in a flotation column

Authors

  • S. K. Biswal,

    1. Regional Research Laboratory, Council of Scientific and Industrial Research, Bhubaneswar-751013, India
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  • P. S. R. Reddy,

    Corresponding author
    1. Regional Research Laboratory, Council of Scientific and Industrial Research, Bhubaneswar-751013, India
    • Regional Research Laboratory, Council of Scientific and Industrial Research, Bhubaneswar-751013, India
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  • S. K. Bhaumik

    1. Regional Research Laboratory, Council of Scientific and Industrial Research, Bhubaneswar-751013, India
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Abstract

The bubbles that were generated in a flotation column were measured. The bubble size distributions were obtained both for air-water and air-water-coal systems. The size distribution pattern was fitted to different equations. It was found that the bubble size distribution in both the flotation and cleaning zones follows the Rosin-Rommler equation used to describe the particle size distribution in crushing. This study indicates that bubbles in the cleaning zone are always larger than those of the flotation zone and finer bubbles are generated when a mixture of frothers is used instead of individual frothers.

Abstract

On a mesuré des bulles créées dans une colonne de flotation. La distribution de taille des bulles obtenue pour les systémes air-eau et air-eau-charbon a été calée à différentes équations. On a trouvé que la distribution de taille des bulles dans les zones de flotation et de nettoyage suit l'équation de Roslin-Rommer utilisée pour décrire la distribution de taille de particules en broyage. Cette étude montre que les bulles dans la zone de nettoyage sont toujours plus grandes que celles de la zone de flotation, et que les bulles les plus fines sont créées lorsqu'on utilise un mélange d'agents moussants plutǒt que des agents moussants individuels.

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