Liquid overflow from a column of rising aqueous froth

Stevenson, Paul; Stevanov, C.; Jameson, Graeme J.

doi:10.1016/j.mineng.2003.05.004

Cited by 24 publications

(15 citation statements)

References 22 publications

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“…Foam drainage in a rising foam column was also studied to predict the superficial liquid flow rate as a function of the gas superficial velocity and other relevant parameters [38,39]. The water recovery rate, J f , from a rising foam column is determined as…”

Section: Model Calculationsmentioning

confidence: 99%

Foam drainage

Kruglyakov

Karakashev

Nguyen

et al. 2008

Current Opinion in Colloid & Interface Science

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This review focuses on recent works on foam drainage + including both the advanced theoretical and experimental studies into foam drainage, standard and extended drainage theories with analytical and numerical solutions. Highlights of recent works include the effect of physico-chemical properties of the gas-liquid interface on foam drainage, and the foam-structure related properties governing the channel-and node-dominated drainage regimes. Important results obtained using the foam pressure drop technique which allows a systematic investigation of foam drainage with the constant and varying Plateau border radius are discussed. The free and forced drainage methods have also been the useful experimental techniques for revealing two important drainage regimes by the channels and the nodes. Finally, the influence of the syneresis on the foam stability and destruction is reviewed.

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Section: Model Calculationsmentioning

confidence: 99%

Foam drainage

Kruglyakov

Karakashev

Nguyen

et al. 2008

Current Opinion in Colloid & Interface Science

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“…The froth zone has attracted increasing attention in the last decade [18] [19] including the role of solids as summarized in a recent review by Hunter et al, [20]. Froth is an integral part of the flotation system but despite the importance, relatively few studies have been conducted to examine the impact of froth variables (e.g.…”

Section: The Froth Zonementioning

confidence: 99%

The Effects of Frothers and Particles on the Characteristics of Pulp and Froth Properties in Flotation—A Critical Review

Zhang¹

2016

JMMCE

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The pulp and froth zones are the main components of froth flotation as it defines both quality of the end product and overall efficiency. The importance of the properties of the two zones, which include pulp hydrodynamics, froth bubble coalescence rate, water overflow rate, air recovery, etc., is being increasingly recognized. The properties are depending not only on the type and concentration of the frother but also on the nature and amount of the particles present in the flotation system, and as well as the frother-particle interactions and potentially of bubble-particle interactions. To date, there is no specific criterion to quantify pulp and froth properties through the interactions between frothers and particles because the various related mechanisms occurring in the pulp and froth are not fully understood. Linking the properties to the metallurgical performance is also challenged. In order to better understand the effect of these issues in flotation, in this review paper, the past and recently published articles relevant to characterizations of pulp and froth properties are widely reviewed; the findings and the gap of knowledge in this area are highlighted for further research.

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“…However, they displayed different trends after this point as H R increased from 0 cm to 15 cm: Q D continued to decrease near exponentially while only slight decreases of out were observed. A variable, F n , which was similar to Q D was proposed in Neely et al [37] for modeling a batch foam fractionation process. It was defined as the flow rate of the interstitial liquid draining from a postulated equilibrium stage.…”

Section: Proper Operating Conditionsmentioning

confidence: 99%

A drainage-enhancing device for foam fractionation of proteins

Qian

Zheng

et al. 2010

Chin. Sci. Bull.

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The foam fractionation of nisin from its fermentation broth was studied. Two types of devices consisting of a rubber piston and a foam riser were developed to enhance foam drainage. The separation performance of these two devices was investigated. Experimental results indicated that the second device could significantly reduce the liquid fraction of the foam leaving the column, out , leading to a higher enrichment of the out-flow stream. As its mounting height increased from 0 to 15 cm, out declined from 7.07‰ to 6.13 ‰ and the maximum nisin activity in the foamate could reach 39.6 IU/ L. The slight increase in nisin inactivation rate indicated the applicability of this method in the recovery and concentration of proteins. Finally, the mechanism of the process was primarily explained by invoking recent work on pneumatic foams. This research provides a basis for the design of multistage draining foam fractionator which could potentially be an effective separation equipment. bioseparation, foam fractionation, drainage, liquid holdup, bubble column Citation:Wu Z L, Qian S Y, Zheng H J, et al. A drainage-enhancing device for foam fractionation of proteins.

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Liquid overflow from a column of rising aqueous froth

Cited by 24 publications

References 22 publications

Foam drainage

Foam drainage

The Effects of Frothers and Particles on the Characteristics of Pulp and Froth Properties in Flotation—A Critical Review

A drainage-enhancing device for foam fractionation of proteins

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