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孔亚鹏,李斌川,陈建设,刘奎仁,韩庆.氟化物熔盐中快速电脱氧制备金属钒及其机理[J].稀有金属材料与工程(英文),2018,47(6):1824~1829.[Kong Yapeng,Li Binchuan,Chen Jianshe,Liu Kuiren and Han Qing.Preparation and Reaction Mechanism of Metallic Vanadium by Rapid Electro-deoxidization in Molten Fluorides[J].Rare Metal Materials and Engineering,2018,47(6):1824~1829.]
Preparation and Reaction Mechanism of Metallic Vanadium by Rapid Electro-deoxidization in Molten Fluorides
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Received:May 06, 2016  Revised:June 07, 2016
DOI:
Key words: Molten fluorides  V2O3  metal vanadium
Foundation item:中央高校基本科研业务费(N110402007,N130102002)
Author NameAffiliation
Kong Yapeng,Li Binchuan,Chen Jianshe,Liu Kuiren and Han Qing  
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Abstract:
      By using NH4VO3 as raw material, high-active V2O3 cathode pellets were prepared by reduction with coal gas and in-situ sintering, then were directly reduced to metallic vanadium by rapid electro-deoxidization in molten fluorides. The mechanism of V2O3 electro-deoxidization was studied by cyclic voltammetry experiments and constant potential electrolysis experiments. The results indicate that the rapid electro-deoxidization of V2O3 can be realized in molten fluorides, metallic vanadium containing 0.218 wt% oxygen can be obtained after 4 h electrolysis. The in-suit formation of aluminium-oxygen-fluorine complex ions, which further forming aluminum metal in deoxidation reaction zone, caused aluminum thermal reduction reaction of V2O3 cathode. So direct electro-deoxidation reduction and aluminum thermal reaction of V2O3 both existed in the deoxidation process of V2O3 cathode, and the latter reaction played a key role in acceleration action. Electro-deoxidization process of V2O3 cathode can be enhanced effectively by adding aluminium oxide in molten fluorides, the electrolytic time can be shortened to 3 h with other conditions unchanged.