A new experimental method for determining particle capture efficiency in flotation

Huang, Zhujun; Legendre, Dominique; Guiraud, Pascal

doi:10.1016/j.ces.2010.12.006

Cited by 30 publications

(10 citation statements)

References 27 publications

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“…(i) attachment of the particle to air bubble or the so-called true flotation, (ii) entrainment and (iii) drainage [33][34][35]. The entrainment which occurs in the suspension zone is totally unselective and collects relatively large particles (both hydrophobic and hydrophilic particles).…”

Section: Comparison Between Soils Floatabilitiesmentioning

confidence: 99%

Study of a foam flotation process assisted by cationic surfactant for the separation of soil clay particles: processing parameters and scaling-up sensitivity

Said

Frances

Grandjean

et al. 2019

Chemical Engineering and Processing - Process Intensification

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In a radioactively contaminated soil, cesium 137 is known to be uptaken by fine particles, preferentially by micrometric phyllosilicate particles. Cesium is almost irreversibly adsorbed on the planar and frayed edge sites of the phyllosilicates. Particulate froth flotation technology assisted by cationic surfactant and operating in continuous mode is studied as a possible method to selectively separate fine phyllosilicate particles from soil. As a first approach, the strategy was to investigate the potentiality of this modular technology to separate fine phyllosilicates from non contaminated soils. Several soils, exhibiting various physicochemical properties were floated and compared. The objective was to disclose and understand the influence of soil textural and physicochemical properties on the separation of fine phyllosilicate particles. Comparison between soils flotabilities indicated that the separation yield and the selectivity on fine particles are strongly related to the initial soil properties. Systematic studies of the sizeparticle distribution of the separated particles showed that fine phyllosilicate particles (<50 µm) removal from soil is possible. Three main size classes are detected in the separated samples: the first one is centered on 3 µm and could be attributed to the phyllosilicates class; the second one is centered on 10 µm and could be a phyllosilicate aggregates class; the last one, on 30-50 µm (depending on soil properties and flotation conditions), could be composed of phyllosilicate aggregates and/or silica aggregates classes. Finally, the mineralogical composition of the separated particles from the various soils were identified by using X-Ray Diffraction analysis.

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Section: Comparison Between Soils Floatabilitiesmentioning

confidence: 99%

Study of a foam flotation process assisted by cationic surfactant for the separation of soil clay particles: processing parameters and scaling-up sensitivity

Said

Frances

Grandjean

et al. 2019

Chemical Engineering and Processing - Process Intensification

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“…In [24], a new approach to measure the bubble-particle capture efficiency by establishing the relationship between capture efficiency P capt , bubble rise velocity U b , and bubble clean angle q clean is proposed. As in the previous work of this group [22], quasi-spherical glass microballs (5-75 μm in diameter, density 2363 kg m -3 ) were used as model particles in the experiments.…”

Section: Resultsmentioning

confidence: 99%

“…The value of probability P capt obtained in [22][23][24] was determined for Reynolds numbers corresponding or close to the Levich flow regime. This can be explained by the possibilities of the experimental technique, in particular, the minimal size of the generated bubbles.…”

Section: Resultsmentioning

confidence: 99%

Determination of the Collision Probability between Bubbles and Nonspherical Particles in Flotation

Sokovnin¹,

Zagoskina²,

Zagoskin³

2014

Chem Eng & Technol

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A new mathematical model of the collision probability between bubbles and nonspherical particles is proposed. In this model it is assumed that the characteristic size of the particle is much smaller than the bubble radius; the particle density is close to the density of the flotation medium and the particle moves along a streamline flowing around the floating bubble (so-called inertialess flotation). So, the stochastic orientation of the particle with respect to the bubble surface was considered. On the basis of this model, the analytical expressions of the collision probability for rod-like and disk-like particles in the Stokes and Levich hydrodynamic regimes were obtained. The obtained results were compared with previous theories and experimental data.

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“…One of the biggest bubble in the current study had a diameter of 250 µm, and the velocity for all bubbles was below 2.5 cm/s whereas Huang et al (2011) found that bubbles with a diameter of 250 µm had a velocity of 3.4 cm/s in pure water. Mei et al (1994) predicted that bubbles with a diameter of 250 µm would have a velocity higher than 2.5 cm/s in pure water.…”

Section: Bubble Diameter Analysismentioning

confidence: 86%

Bubble Dynamics of Batik Dyeing Waste Separation using Flotation

Warjito

Nurrohman²

2016

IJTech

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Batik waste can increase water characteristics, such as turbidity, color and total suspended solids (TSS). Thus, an efficient technique for separating Batik from the liquid to decrease these characteristics is needed. The aim of the current study was to understand the results of flotation using electrolysis and to investigate the bubble characteristics that influence the results of the flotation of Batik waste. Flotation studies have been conducted using electrolysis to produce bubbles to separate batik synthetic dye from the liquid. Research conducted with 316L stainless steel electrodes, inside a 100 cm tall acrylic pipe with an inner diameter of 8.4 cm and a voltage variation of 10, 15 and 20 V. Batik waste was mixed with distilled water. Commercial alum powder [aluminum sulfate, Al 2 (SO 4 ) 3 .14H 2 O, that is 17% Al 2 O 3 ] as the reagent was added to coagulate Batik waste in a ratio of 1 gram per 10 ml of Batik waste. The results showed that flotation of Batik waste can be used to separate Batik waste with the addition of alum. Alum was shown to be capable of acting as a collector in this type of waste separation. The results showed that flotation using electrolysis could be an effective method for reducing turbidity, color and TSS.

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A new experimental method for determining particle capture efficiency in flotation

Cited by 30 publications

References 27 publications

Study of a foam flotation process assisted by cationic surfactant for the separation of soil clay particles: processing parameters and scaling-up sensitivity

Study of a foam flotation process assisted by cationic surfactant for the separation of soil clay particles: processing parameters and scaling-up sensitivity

Determination of the Collision Probability between Bubbles and Nonspherical Particles in Flotation

Bubble Dynamics of Batik Dyeing Waste Separation using Flotation

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