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Mineral Processing and Extractive Metallurgy Review, 1993
Good flotation frothers have branched hydrocarbon radicals and form loosely packed gaseous films at the liquid/gas interface. Their hydrophile-lipophile properties must be properly balanced and for most good frothers the HLB values are close to 6. This allows them to co-operate actively with the adsorbed collector in the moment of particle-to-bubble ...
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Good flotation frothers have branched hydrocarbon radicals and form loosely packed gaseous films at the liquid/gas interface. Their hydrophile-lipophile properties must be properly balanced and for most good frothers the HLB values are close to 6. This allows them to co-operate actively with the adsorbed collector in the moment of particle-to-bubble ...
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Flotation frothers for low‐rank coals
Journal of Applied Chemistry, 1955AbstractA number of aliphatic alcohols and acids, phenols and other heteropolar compounds were studied as flotation frothers for a tetralin‐conditioned low‐rank coal.The effects of these reagents, in the absence of coal, on the static surface tension of water and on froth formation and the character of bubble streams in aqueous solutions were ...
J. Mainhood, P. F. Whelan
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Colorimetric determination of common industrial frothers
Minerals Engineering, 2005Abstract Methylisobutyl carbinol (MIBC) and a methoxy polypropylene glycol (Dowfroth 250) were determined by a colorimetric procedure using salicylaldehyde. Linear calibration curves in absorption spectrophotometry were obtained for MIBC between 0.05 and 0.2 mg/sample at ∼520 nm, and for D250 between 0.2 and 0.5 mg/sample at ∼535 nm.
S. Gélinas, J.A. Finch
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Frother Effects on Bubble Motion in A Swarm
Canadian Metallurgical Quarterly, 1993AbstractThe effect of frothers on the average bubble rise velocity in bubble swarm systems was investigated. It is shown from this study that adding a frother has a drastic effect on bubble motion in a flotation column. In the absence of frothers, the average bubble rise velocity decreases with the increase of gas flowrate; while in the presence of ...
Z. A. Zhou, N. O. Egiebor, L. R. Plitt
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Adsorption of frothers at coal/water interfaces
Colloids and Surfaces, 1982Abstract The adsorption of phenol and three commonly used frothers, namely, terpineol, methylisobutylcarbinol (MIBC) and cresol, on coal surfaces has been studied through UV spectrophotometric and gas chromatographic techniques. The rate of attaining adsorption equilibrium of these alcohols onto coal is very slow, possibly due to pore diffusion.
D.W. Fuerstenau, null Pradip
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Frothing Properties of Amine/Frother Combinations
Mining, Metallurgy & Exploration, 2019Methods to determine frother functions, control of bubble size and froth properties, are now widely used. Some collectors also exhibit frother functions which are less understood. Using a water-air system in a mini-mechanical flotation cell setup, this paper determines bubble size and water overflow rate for three amine collectors: one primary amine ...
Xiang Zhou, Yue Hua Tan, James A. Finch
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Effect of frother blends on hydrodynamic properties
International Journal of Mineral Processing, 2013Abstract The effect of blending polyglycols (F150 and DF250) with alcohols (MIBC and pentanol) on bubble size, gas holdup and froth height in a two-phase system has been determined. A synergistic effect on froth height was observed accompanied by a change in bubble size: below the alcohol critical coalescence concentration (CCC) the addition of small
A.M. Elmahdy, J.A. Finch
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Structure and Performance of Frother
2016Frothers have been applied in the mineral flotation. This chapter briefly introduces the relationship between structure and performance of the existing frothers.
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EFFECT OF FROTHER AND FROTHER BLENDS IN FLOTATION PRACTICE
La flottation est un système complexe et interactif, influencé par des facteurs chimiques, opérationnels et liés aux machines. La modification de l'un de ces trois facteurs peut affecter les performances globales de la flottation. Dans cette étude, deux séries d'expériences sont conçues pour étudier l'effet du moussant et de ses mélanges en pratique deopenaire +1 more source
Synergistic Effect of Frother on Coal Flotation
Coal Preparation, 1986Overall response to flotation of coal fines is improved by using mixtures of pine oil and methyl isobutyl carbinol as frother instead of either of them alone. Measurements of static froth height and surface tension of aqueous solutions of the frother are used to study the synergistic effect and to arrive at an optimum frother composition.
S. G. KUMAR +4 more
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