201871 · Historically, hydrodynamics in flotation has been described using a range of dimensionless numbers and key hydrodynamic parameters; e.g. power intensity, impeller tip speed, Power number, Froude number, tank-turnover time and Air flow number. Hydrodynamics is responsible for mixing which is important in mechanically agitated …
view more2007125 · Abstract The effect of impeller speed on the air flow in a self-aerated Denver laboratory flotation cell was investigated using computational modelling. Air is induced into the slurry by the impeller's rotating action. The rate of air flow is determined by the suction pressure created by the impeller, the hydrostatic head of the slurry and the …
view more200511 · The flow field induced in an Outokumpu TankCell and by an OK rotor-stator mixing device in a laboratory and a process size flotation cell was modelled numerically using computational fluid ...
view more201841 · Here, a brief analysis of the motion characteristics of the bottom flow in a flotation machine is provided. The impeller in a flotation machine acts like a partially open pump [18].
view more2015330 · Time-dependent simulations of two-phase flow in flotation machines are essential to understanding flow behavior and physics in self-aerated machines such as the Wemco machines.
view more201928 · Highlights • Large flotation tanks present design and performance challenges. • Scale-up of flotation tanks is extremely important yet scarcely discussed. • Studies can be categorised into ‘kinetic’ and ‘machine design’ scale-up. • Gaps in knowledge on flotation scale-up and design are highlighted. • This review critiques current scale-up …
view more2017829 · Flotation machine, flotation cell, stator, rotor, aeration, pulp turbulization, energy, reagent mode ... 3 and higher mainly depends on an impeller velocity and practically remains constant, viz. 0.8 – 1.0 kW/m ... For example, replacement of Wemco machine with 160 m3 cell by one with 257 m3 cell resulted in the flotation time increase from ...
view more198441 · Wear reduces velocity and turbulence by reducing the volume of impeller blades; yet there is a lack of knowledge on flotation cells. Additionally, there is a lack of knowledge in the literature regarding the effect of blade wear on bubble–particle interactions.
view more201951 · Abstract A series of numerical simulations of turbulent single-phase flows are performed to understand the flow and mixing characteristics in a laboratory scale flotation tank. Four impeller blade ...
view more202311 · Salem-Said et al. (2013) presented the turbulent flow and kinetic energy profiles of two-phase (water–air) flows in a Dorr-Oliver flotation machine using CFD. Basavarajappa et al. (2015) carried out CFD modeling and PIV experiments of single-phase flow characteristics in stirred tanks with a Rushton turbine and flotation impeller.
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