Frothing behavior of aqueous solutions of oleic acid

Atrafi, Avishan; Gómez, C.O.; Finch, J.A.; Pawlik, Marek

doi:10.1016/j.mineng.2012.03.020

Cited by 19 publications

(2 citation statements)

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“…Bubbles were generated in a 2.7 L EDEMET flotation cell equipped with control loops to set air flowrate and agitation at 1200 rpm [26]. The bubble size analysis considered the measurement of at least 4000 bubbles to have representative samples [27]. The images obtained were processed using the Image J 1.54d software to measure the surface area of each bubble and, subsequently, the diameter (di) of each bubble was calculated.…”

Section: Bubble Size Distributionsmentioning

confidence: 99%

Foaming Properties of Lignosulfonates in the Flotation Process

Chique,

Uribe,

Pawlik

et al. 2023

Polymers

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The widely used technology for the selective flotation of copper and molybdenite using sodium hydrosulfide (NaSH) to depress copper sulfides creates environmental issues related to the potential emissions of toxic hydrosulfide gas (H2S) and bad odors. Previous studies showed that molybdenite flotation can be depressed by the action of lignosulfonates, but no significant progress has been made in studying the effect that these reagents have on the foaming/frothing phenomena in flotation. The objective of this work was to investigate the foaming properties of three samples of lignosulfonates through measurements of surface tension, foamability, bubble size distributions, and water recovery. A sugared sodium lignosulfonate (NaLS), a calcium lignosulfonate (CaLS), and a sample prepared by sulphomethylation of kraft lignin (KLS) were tested. It was found that all lignosulfonates displayed surface activity that decreased with pH and was related to the degree of anionicity and molecular weight. The NaLS lignosulfonate showed the highest dynamic foamability index (DFI) value, compared to that of the CaLS and KLS samples. The lignosulfonates tested in this study strongly affected bubble size. Water recovery tests performed using flotation experiments in a two-phase system showed that the KLS and NaLS samples had the strongest effect, which correlated with the surface tension, foamability, and bubble size results.

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Section: Bubble Size Distributionsmentioning

confidence: 99%

Foaming Properties of Lignosulfonates in the Flotation Process

Chique,

Uribe,

Pawlik

et al. 2023

Polymers

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“…Modification, emulsification and synergistic dosing are the conventional methods [108,109] to improve the dispersibility and collection performance of fatty acids under low temperature conditions. Therefore, improving the dispersity and selectivity of the collector at low temperatures by optimizing the flotation reagent scheme is the key to improving the flotation index.…”

Section: Industrial Practice Cases Of Flotation Separation Of Fluorit...mentioning

confidence: 99%

Difficulties and Recent Achievements in Flotation Separation of Fluorite from Calcite—An Overview

Huang

Zhang

Li³

et al. 2022

Minerals

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As an important strategic non-metallic mineral resource, fluorite has been widely used in various industrial fields, such as metallurgy, optics and semiconductor manufacturing, as well as fluorine-related chemical engineering. Since the major gangue minerals of fluorite ore are silicate and carbonate ones, flotation is the main beneficiation method for the concentration. Compared with the relatively easy operation for silicate-type fluorite ore, fluorite concentration from calcite has always been the most difficult challenge in the field of mineral processing. In this review, analyses of the fundamental reasons for the difficulties of flotation separation of fluorite from calcite are performed, from the similar surface properties of both calcium minerals to the deterioration by the interference of dissolved ions in the pulp during grinding and flotation. Recent achievements in the flotation separation of fluorite from calcite as the main contents are comprehensively summarized, covering all aspects of flotation reagents of collectors, depressants and modifiers. Finally, successful examples of industrial practices forfluorite and calcite flotation separation are introduced. This overview provides a detailed and comprehensive reference source for the current research status of fluorite and calcite flotation separation, and some suggestions for future research are provided.

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