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A MODEL OF BUTTERFLY CATASTROPHE FOR anode effect IN ALUMINA ELECTROLYSIS

Acta Metallurgica Sinica(English Letters) 1991年第8期4卷 82-87页

作者： PAN Yue Qingdao University of Metallurgy and Mining

A model of butterfly catastrophe is confirmed based on the matching and fitting the previous experimental data from alumina electrolysis when anode effect occurs.The complicated behaviour of the cryolite-alumina melt system with varying parameters could be generally described by this model.Therefore,the anode effect and its occurrence may be thoroughly understood.

关键词： alumina electrolysis anode effect butterfly catastrophe model

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A New Contribution to the Theory of anode effect in Aluminium Electrolysis

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Journal of Materials Science & Technology 1992年第1期8卷 15-19页

作者：邱竹贤 Northeast University of Technology Shenyang110006China

This paper discusses the general characteristics of anode effect in aluminium electrolysis and pre- vious theories about the mechanism of anode effect. On the basis of laboratory experiments,the author suggests a new ... 详细信息

关键词： anode effect electrolysis aluminium

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Electroanalytical Study of Electrode Processes on Carbon anode in Lithium Fluoride and Neodymium Fluoride Melt

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Journal of Rare Earths 2007年第S1期25卷 533-536页

作者：王桂华王祥生朱鸿民 School of Applied Sciences University of Science and Technology Beijing School of Metallurgical and Ecological Engineering University of Science and Technology Beijing

The anode processes of carbon electrode in LiF-70%NdF3 melt were studied by electroanalytical techniques, including cyclic voltammetry(CV) and chronoamperometry(CA). anode gases were analyzed by gas chromatography(GC) on-line during controlled-potential electrolysis. Two anode peaks were observed. The first process starting at 2.0 V vs Li+/Li was corresponded to the discharge of residual oxide ions, with the generation of CO and CO2. The discharge of fluoride ions occurred at the potentials higher than 4.3 V vs Li+/Li, with the generation of a small amount of CF4 and C2F6, accompanied by a sudden drop in current, marking the onset of the anode effect. The second process occurred when the potential exceeded 5.5 V vs Li+/Li, with the generation of a large amount of CF4 and C2F6. When the temperature was changed from 1173 to 1273 K, the current of the second process decreased, leading to a stable anode effect.

关键词： fluorides perfluorocarbons electrochemical methods gas chromatography anode effect rare earths

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Research Progress of Electro-Deposition of Aluminum

Research Progress of Electro-Deposition of Aluminum

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2010年全国冶金物理化学学术会议

作者：葛志伟张丽鹏于先进董云会李德刚王晓铭 School of Chemical Engineering Shandong University of Technology

Aluminum is the reactive metal with the more negative reduction potential,so the production of aluminum are more complicated than those of any metal.We have discussed the major processes of aluminum production:one is the Hall-Heroult process in which the electrolyte(molten salts) that composed of Cryolite(NaAlF),alumina(AlO) and some additives were used at high temperature. The other is the electro-deposition of aluminum form ionic liquids(Ils).Both of there properties,mechanisms of electrolysis and faced problems were investigated.We got a conclusion that the new and efficient green technology is the inevitable trend of aluminum future industrial development.

关键词： electro-deposition Hall-Heroult process molten salts anode effect ionic liquids

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