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- W2240197647 abstract "A theoretical model is presented to calculate the collection efficiency of nano- and sub-micron particles. The theory incorporates Brownian diffusion, and colloidal forces that come into effect at small separation distances. The governing equation is solved numerically using the Crank-Nicholson method with variable step size. Predictions from the model are compared with experimental results obtained in a small laboratory cell, in which colloidal silica particles with diameters in the range 40 to 160 nm were floated using fine bubbles of typical average diameter 150 microns. The particle concentration in the pulp was about 1% by weight. CTAB and Dowfroth 250 were used as the collector and frother. The experimental results show the collection efficiency to have a minimum at a particle size in the order of 100nm. With larger particles, the interception and collision mechanisms predominate, while the diffusion and colloidal forces control the collection of particles with a size smaller than the transition size. The predicted collection efficiencies are in good agreement with the experiments." @default.
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- W2240197647 date "2004-01-01" @default.
- W2240197647 modified "2023-09-24" @default.
- W2240197647 title "Experimental validation of a model for nanoparticle flotation" @default.
- W2240197647 hasPublicationYear "2004" @default.
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