Classification of Flotation Frothers

Drzymala, Jan; Kowalczuk, Przemyslaw B.

doi:10.3390/min8020053

Cited by 47 publications

(25 citation statements)

References 55 publications

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“…Therefore, the ability of a frother to prevent bubble coalescence could be evaluated based on the amount of bound water which interrupts drainage between adjacent bubbles. More detailed classification of frothers was recently given by Drzymala and Kowalczuk and by Khoshdast and Sam …”

Section: Aeration Of Ore Slurriesmentioning

confidence: 99%

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Role of mineral flotation technology in improving bitumen extraction from mined Athabasca oil sands—II. Flotation hydrodynamics of water‐based oil sand extraction

Zhou¹,

HaiHong²,

Chow³

et al. 2019

Can J Chem Eng

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Bitumen flotation hydrodynamics in water‐based oil sand extraction is critically reviewed by comparing aeration of oil sand slurries with mineral flotation. The role of the two‐stage particle‐bubble attachment model in flotation is emphasized as a means to accelerate bitumen flotation recovery. It involves the generation of micro/nanobubbles and their frosting on hydrophobic bitumen droplets, followed by their attachment to a flotation‐size bubble via its coalescence with the nanobubbles frosted on the bitumen. Nanobubble generation by hydrodynamic cavitation demonstrates that the size of nanobubbles can be reduced, and the number of nanobubbles increased by fast liquid flow, intensified agitation, high dissolved gas content and surfactant concentration. The mechanism of pre‐existing gas nuclei in enhancing nanobubble generation by cavitation is utilized to produce a large volume of stabilized nanobubbles for practical flotation, by continuously recirculating the stream through a gas saturation tank or a cavitation tube. The aeration of oil sand slurries in hydrotransport pipelines is analyzed based on its similarity to dissolved air flotation. Bitumen extraction recovery increased significantly with the presence of nanobubbles in the system. The role of improved flotation hydrodynamics in bitumen recovery is briefly discussed in terms of the Suncor operation using flotation columns to process oil sand middling streams. Future research should be directed at understanding bitumen flotation kinetics, optimizing size ranges of nanobubbles for maximized flotation recovery, minimizing wearing of cavitation tubes in industrial operations, and intensifying the role of in‐situ nanobubble nucleation on hydrophobic particles/bitumen droplets in flotation, especially for bitumen extraction from underperforming oil sands.

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Section: Aeration Of Ore Slurriesmentioning

confidence: 99%

“…classification of frothers was recently given by Drzymala and Kowalczuk [96] and by Khoshdast and Sam. [97] The technique of determining liquid film thickness around a bubble (or bound water) might provide a simple method to elucidate the effect of different types of frothers on bubble terminal velocity and gas holdup.…”

Section: Single Bubblesmentioning

confidence: 99%

Role of mineral flotation technology in improving bitumen extraction from mined Athabasca oil sands—II. Flotation hydrodynamics of water‐based oil sand extraction

Zhou¹,

HaiHong²,

Chow³

et al. 2019

Can J Chem Eng

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show abstract

“…Both v1 and k1 are numerically identical, though the specific rate is a more informative parameter because it has a physical meaning, that is indicates the speed of the process in the form of amount of solids of the considered component in concentrate per amount of solids in the flotation cell per unit time. Other kinetic equations can also be used [13,14].…”

Section: Determination Of Kinesis Of Flotation and Frother Dosementioning

confidence: 99%

“…1a) provides two parameters, that is maximum recovery ( max) and a constant (v or k) along with information at what frother dose (C) they were obtained. Next, the limits flotation curve [14] can be plotted as shown in Fig. 1b.…”

Section: Determination Of Kinesis Of Flotation and Frother Dosementioning

confidence: 99%

Evaluation of frothers based on properties of the solids/liquid/gas system

Drzymala

2017

E3S Web Conf.

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Abstract.A methodology of selection of frothers for flotation process is presented in the paper. It is based on performing a series of fractionating flotation tests of a considered material at different doses of a selected frother and calculation of the mass balance of the process. Next, three steps are performed. The first one is determination of the frother dose and kinetic constant or specific rate, using the flotation limits plot relating maximum recovery and process rate, both at a selected maximum recovery of the considered material component. The second step is finding selectivity of separation by using the upgrading Fuerstenau plot, while the third element is frothers comparison plot in the form of selectivity versus process kinetics, at a selected maximum recovery, and also versus frother dose, for choosing the most suitable frother.

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“…Foam is thermodynamically unstable and dissipates through self-destructive processes due to liquid drainage, Ostwald ripening, and bubble coalescence (Carey and Stubenrauch, 2010;Wang et al, 2017). The issues of foamability and foam stability are very important for numerous industrial applications such as mineral flotation (Drzymala and Kowalczuk, 2018;Kowalczuk and Drzymala, 2017;Xing et al, 2017;Zheng et al, 2017), wastewater treatment (Bournival et al, 2014;Fruhner et al, 2000), tertiary oil recovery (Ramaswamy et al, 2007), personal care products, etc. Particularly, foam stability is known to play a significant role in determining the mineral grade and recovery efficiency in mineral-flotation operations.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Properties of Aqueous Foams Stabilized by Cetyltrimethylammonium Bromide in Terms of Free Drainage and Bubble Size

Wang

Cao

et al. 2019

J Surfact & Detergents

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Although foams stabilized by surfactants have been the subject of massive investigations and great achievements were made over the past few years, many questions concerning their properties are still not well understood. The aim of this study is to examine the effect of the cetyltrimethylammonium bromide (CTAB) concentration on the foam properties and illustrate the interaction between liquid drainage and bubble size evolution. Experiments were carried out at varying CTAB concentrations ranging from 0.1 to 5.0 times the critical micelle concentration (CMC), where the variation of the liquid content of foam and bubble size was simultaneously determined using a commercially available FoamScan device. The results showed that the foam properties (both foamability and foam stability) of CTAB were largely dependent on the surfactant concentration when concentrations c < CMC but this effect did not scale linearly with concentration. When c ≥ CMC, both foamablity and foam stability were nearly concentration independent, while the latter showed a small decrease due to the formation of micelles. In addition, the correlation between free drainage and bubble size evolution indicated that the increase of bubble size could indeed enhance the foam drainage.

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Classification of Flotation Frothers

Cited by 47 publications

References 55 publications

Role of mineral flotation technology in improving bitumen extraction from mined Athabasca oil sands—II. Flotation hydrodynamics of water‐based oil sand extraction

Role of mineral flotation technology in improving bitumen extraction from mined Athabasca oil sands—II. Flotation hydrodynamics of water‐based oil sand extraction

Evaluation of frothers based on properties of the solids/liquid/gas system

Investigation on the Properties of Aqueous Foams Stabilized by Cetyltrimethylammonium Bromide in Terms of Free Drainage and Bubble Size

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