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The electrowinning of vanadium oxide from alkaline solution
Liu, Biao; Zheng, Shili; Wang, Shaona; Zhang, Yi; Du, Hao

Roasting-leaching-precipitation-calcinations is the conventional way for manufacturing vanadium oxide. Due to the mixing of sodium and ammonium salts in the ammonium precipitation process, a large amount of high concentration ammonia-nitrogen wastewater is produced. In this work, a novel preparation method of low-valent vanadium oxide has been proposed. Using the intermediate product of sodium metavanadate as material, low-valent vanadium oxide was one-step prepared by electroreduction. The sodium hydroxide was meanwhile formed and could be recycled back to the roasting circuit. Current density, temperature, vanadium concentration and alkali concentration were varied to evaluate current efficiency and energy consumption. A maximum current efficiency of 33.5% and a minimum energy consumption of 2700 kWh were obtained under the optimized conditions of temperature 60 degrees C, vanadium concentration 0.2 M, alkali concentration 0.25 M and current density 267 A/m(2). It is a cleaner production method to prepare low-valent vanadium oxide, showing good prospects. (C) 2016 Elsevier B.V. All rights reserved.

KeywordVanadium Oxide Electrowinning Alkali Recycle Cleaner Production
WOS HeadingsScience & Technology ; Technology
Indexed BySCI ; ISTP
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000383522100005
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Document Type期刊论文
AffiliationChinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Liu, Biao,Zheng, Shili,Wang, Shaona,et al. The electrowinning of vanadium oxide from alkaline solution[J]. HYDROMETALLURGY,2016,165(OCT):244-250.
APA Liu, Biao,Zheng, Shili,Wang, Shaona,Zhang, Yi,&Du, Hao.(2016).The electrowinning of vanadium oxide from alkaline solution.HYDROMETALLURGY,165(OCT),244-250.
MLA Liu, Biao,et al."The electrowinning of vanadium oxide from alkaline solution".HYDROMETALLURGY 165.OCT(2016):244-250.
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