Investigation sur l'impact de la concentration de moussant dans un système solide-liquide-gaz et automatisation d'un capteur de dimension des bulles

Authors: Roy, Jonathan
Advisor: Del Villar, René
Abstract: Surfactant agents are used in flotation columns to improve the physical and chemical properties of the slurry. In general, they directly affect the superficial tension by decreasing the energy necessary for bubble formation and by increasing their elasticity. The main objective of this master’s thesis is to verify the impact of frother concentration in a three-phase (solid/liquid/gas) system on the air hold-up. The thesis also deals with the availability of an automated system for bubble diameter measurement (bubbles viewer) in a three-phase system (slurry-air). The study reveals that for high concentration, hydrophobic particles seem to cancel the effect of the bubble on the gas hold-up. Furthermore, the type of conductivity cell used is problematic because it promotes preferential flow (pulp/bubbles). Lastly, the bubble viewer can be operated with solids, but it is recommended changing its geometry.
Document Type: Mémoire de maîtrise
Issue Date: 2013
Open Access Date: 19 April 2018
Grantor: Université Laval
Collection:Thèses et mémoires

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