Adsorption mechanism of mixed collector systems on hematite flotation

Vidyadhar, A; Kumari, Neha; Bhagat, R P

doi:10.1016/j.mineng.2011.11.005

Cited by 56 publications

(17 citation statements)

References 10 publications

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“…In a study‎, attempts were made to enhance the selective separation of pyrrhotite from magnetite iron ore by mixture of xanthate and dixanthogen, and copper sulfate as an activator. The use of dissimilar surfactant mixtures can have a synergistic advantage over the use of individual collectors . Activators and depressants are common used as modifiers to increase desulfurization efficiency and iron oxides recovery, respectively.…”

Section: Physico‐chemical Process (Flotation)mentioning

confidence: 99%

Desulfurization of Iron Ores: Processes and Challenges

Rezvanipour

Mostafavi

Ahmadi

et al. 2018

steel research int.

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Various studies have been increasingly performed on the reduction of sulfur content of iron ores and concentrates. The presence of sulfur in these materials causes technical problems in steel and alloys and environmental issues in the sintering of iron ore process. The achievement of higher sulfur removal rates has been an important goal since the development of sulfur removal techniques. In this research, an effort is made to separately introduce the various processes, industrial practices, and fundamental research activities to remove sulfur from iron ores, concentrates, or roasted iron ores. In this way, the optimized condition and latest innovations in sulfur removal using flotation are reviewed and the development of leaching and bioleaching techniques for sulfur reduction is introduced; following the development of thermal decomposition, physical separation methods, and magnetic separation technique are discussed. In each section, a brief introduction of fundamentals for the sulfur removal techniques and their potential advantages for sulfur removal are described and challenges for each technique are presented. Finally, the techniques are compared from technical, economic and environmental viewpoints, and future trends in desulfurization of iron ores are presented.

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Section: Physico‐chemical Process (Flotation)mentioning

confidence: 99%

Desulfurization of Iron Ores: Processes and Challenges

Rezvanipour

Mostafavi

Ahmadi

et al. 2018

steel research int.

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“…Various mixed collector systems have attracted increased attention in the field of mineral processing because of their synergistic effects and low costs [14,15]. Nonionic surfactants are used as auxiliary collectors to decrease flotation costs and increase flotation efficiency [16,17]. Therefore, in recent years, various ionic and nonionic collectors have been widely studied.…”

Section: Instructionmentioning

confidence: 99%

Effect of Chain Length Compatibility of Alcohols on Muscovite Flotation by Dodecyl Amine

et al. 2018

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A portion of dodecyl amine (DDA) in a muscovite flotation system was replaced with alcohols with different carbon-chain lengths. These alcohols included octanol (OCT); decanol (DEC); dodecanol (DOD); and tetradecanol (TER). The muscovite adsorption behavior of the mixed DDA and alcohol systems were investigated through zeta potential; contact angle; and adsorption quantity tests. Single-mineral flotation tests showed that the muscovite-collecting power of the mixed DDA/alcohol (OCT, DEC, or DOD) system was stronger than that of the pure DDA system. The muscovite-collecting power of the collector systems decreased in the following order: DDA/DEC > DDA/OCT > DDA/DEC > DDA > DDA/TER. Zeta potential and contact angle analysis indicated that when combined with DDA; alcohols physically adsorbed on the surfaces of muscovite. This behavior improved the hydrophobicity of muscovite. Furthermore, adsorption analysis revealed that synergy between DDA and alcohol enhanced the adsorption of alcohol on muscovite. DDA has a dominant role in synergistic adsorption; whereas alcohol has a supporting role. Among all tested alcohols; DDA and DOD exhibit the highest synergetic adsorption effect because of their similar carbon-chain lengths. This similarity promotes the formation of a compact adsorption layer on the muscovite surface.

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“…The use of dissimilar surfactant mixtures can have a synergistic advantage over the use of individual surfactants [7][8][9][10][11]. The influence of nonionic reagents on anionic collector flotation of calcium minerals was investigated [12].…”

Section: Introductionmentioning

confidence: 99%

The Desulfurization of Magnetite Ore by Flotation with a Mixture of Xanthate and Dixanthogen

Cai

2016

Minerals

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Abstract:The contamination of sulfur emanating from pyrrhotite in magnetite concentrates has been a problem in iron ore processing. This study utilized froth flotation to float pyrrhotite away from magnetite using collectors of xanthate and dixanthogen. It was found that xanthate or dixanthogen alone could not achieve selective separation between pyrrhotite and magnetite in flotation. A high loss of magnetite was obtained with xanthate, while a low desulfurization degree was obtained with dixanthogen. It was interesting that a high desulfurization ratio was achieved with little loss of magnetite when xanthate was mixed with dixanthogen as the collector. The synergistic effect of the mixed collector on pyrrhotite was studied by electrokinectic studies and FTIR measurements. It was found that xanthate was the anchor on pyrrhotite and determined its selectivity against magnetite, while dixanthogen associated with xanthate, enhancing its hydrophobicity. This study provides new insights into the separation of iron minerals.

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Adsorption mechanism of mixed collector systems on hematite flotation

Cited by 56 publications

References 10 publications

Desulfurization of Iron Ores: Processes and Challenges

Desulfurization of Iron Ores: Processes and Challenges

Effect of Chain Length Compatibility of Alcohols on Muscovite Flotation by Dodecyl Amine

The Desulfurization of Magnetite Ore by Flotation with a Mixture of Xanthate and Dixanthogen

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