Characterizing Frothers using Gas Hold-Up

Azgomi, F.; Gómez, C.O.; Finch, J.A.

doi:10.1179/000844307794565954

Cited by 8 publications

(6 citation statements)

References 9 publications

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“…corresponds to increasing chain length. The same order is found using other frother characterization schemes [30].…”

Section: The N-alcoholssupporting

confidence: 75%

“…This may be attributed to the branched structure of MIBC: Comley et al [29] postulated that fewer molecules of MIBC are needed per unit area on a bubble to induce equal properties to hexanol. A difference between MIBC and hexanol is not seen in more macroscopic measurements, gas hold-up [30] and water overflow rate from a column [31]. corresponds to increasing chain length.…”

Section: The N-alcoholsmentioning

confidence: 79%

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Using sound to study bubble coalescence

Kracht¹,

Finch²

2009

Journal of Colloid and Interface Science

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“…corresponds to increasing chain length. The same order is found using other frother characterization schemes [30].…”

Section: The N-alcoholssupporting

confidence: 75%

Section: The N-alcoholsmentioning

confidence: 79%

Using sound to study bubble coalescence

Kracht¹,

Finch²

2009

Journal of Colloid and Interface Science

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“…All three frothers hinder coalescence, Pentanol being the weakest one as judged by the increased fraction of bubbles larger than 2.5 mm. Moyo et al (2007) and Azgomi et al (2007), based on other criteria, also classified Pentanol as a weak frother compared to the other surfactants tested.…”

Section: Effect Of Frother Type and Salt (Nacl) On Bubble Size Distrimentioning

confidence: 99%

Bubble break-up and the role of frother and salt

Kracht

Finch

2009

International Journal of Mineral Processing

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“…In the pulp phase, frothers act to reduce bubble size [18][19][20][21], while in the froth phase they act to improve stability [22][23][24]. Laboratory test procedures [25][26][27][28] were developed to quantitatively classify frothers based on their impact in both the pulp and froth phase. Figure 3a shows foam height (indicative of frother effect on the froth phase) plotted against gas holdup (indicative of frother effect on the pulp phase) as measured in the laboratory system.…”

Section: Evaluation Strategymentioning

confidence: 99%

Evaluating the Effect of Operational Changes at the Vale Canada Clarabelle Mill

Doucet¹,

Price²,

Barrette³

et al. 2010

Canadian Metallurgical Quarterly

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In an industrial setting, operational changes are continually introduced driven by new technologies or changing economics. Because of day-to-day variability, quantifying the impact of these changes based on metallurgical performance requires long trial periods to achieve statistically significant results. Newly developed tools and techniques have allowed for direct measurement of process variables (e.g., bubble size, gas and solid holdup). Two case studies are described where direct measurement techniques were used to evaluate a new rotor-stator mechanism and the introduction of a new frother type. Application of these methods has accelerated the evaluation of process changes and improved confidence in the results.Résumé -Dans un environnement industriel, on introduit continuellement des changements opérationnels qui sont entraînés par de nouvelles technologies ou par des changements économiques. À cause de la variabilité au jour le jour, quantifier l'impact de ces changements en se basant sur le rendement métallurgique requiert de longues périodes d'essai pour obtenir des résultats statistiquement significatifs. Des outils et des techniques nouvellement développés ont permis la mesure directe des variables de procédé (par exemple, taille de bulle, rétention de gaz et de solide). On décrit deux études de cas où l'on a utilisé des techniques de mesure directe pour évaluer un nouveau mécanisme de rotorstator et l'introduction d'un nouveau genre de moussant. L'application de ces méthodes a accéléré l'évaluation des changements du procédé et a amélioré la confidence dans les résultats.

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Characterizing Frothers using Gas Hold-Up

Cited by 8 publications

References 9 publications

Using sound to study bubble coalescence

Using sound to study bubble coalescence

Bubble break-up and the role of frother and salt

Evaluating the Effect of Operational Changes at the Vale Canada Clarabelle Mill

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