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题名: Adsorption and zeta potential studies relevant to hematite ore reverse froth flotation
作者: Jiang, Wentian1, 2;  Sun, Chenglin1;  Yang, Xu1
关键词: Flotation ;  Anionic collectors ;  Sodium oleate ;  Hematite ;  Quartz ;  Iron/iron ores ;  Steel making
刊名: MINERALS & METALLURGICAL PROCESSING
发表日期: 2012-08-01
卷: 29, 期:3, 页:148-155
收录类别: SCI
文章类型: Article
类目[WOS]: Metallurgy & Metallurgical Engineering ;  Mining & Mineral Processing
研究领域[WOS]: Metallurgy & Metallurgical Engineering ;  Mining & Mineral Processing
英文摘要: Reverse froth flotation is the most commonly used concentration method for iron ores, where the quartz gangue is floated, while the iron oxides are depressed by starches. In this paper, the mechanisms related to iron ore anionic reverse flotation are investigated by flotation, electrokinetic and high pulp density (20% solids) adsorption studies in alkaline medium using sodium oleate as the model collector. Distribution diagrams of silicate and oleate species are employed to interpret the effects of pH on the electrokinetic and adsorption studies. The flotation experimental results showed that with Ca2+ as activator, quartz responded to flotation well, whereas hematite does not. The changes in zeta potential for quartz are attributed to the hydroxylation of the quartz surface at different pH values and collector concentrations. Coated starch can shift the zeta potential of hematite particles to less positive values and increase its potential differences from quartz and support quartz-hematite separation during flotation. Adsorption results indicated that sodium oleate adsorbs onto the mineral surfaces to form surfactant multilayers due to the lateral interaction between hydrocarbon chains. Adsorption kinetics studies showed that calcium ions can change the collector adsorption kinetics curve on quartz from first order to second order. Minerals & Metallurgical Processing, 2012, Vol. 29, No. 3, pp. 148-155. An official publication of the Society for Mining, Metallurgy, and Exploration, Inc.
关键词[WOS]: IRON-ORES ;  QUARTZ FLOTATION ;  AQUEOUS-SOLUTION ;  MECHANISM ;  COLLECTORS ;  INTERFACE ;  MAGNETITE ;  SYSTEM ;  STARCH ;  WATER
语种: 英语
WOS记录号: WOS:000314675700003
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142860
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Natl Lab Clean Energy, Dalian, Liaoning, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing, Peoples R China

Recommended Citation:
Jiang, Wentian,Sun, Chenglin,Yang, Xu. Adsorption and zeta potential studies relevant to hematite ore reverse froth flotation[J]. MINERALS & METALLURGICAL PROCESSING,2012,29(3):148-155.
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