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Electrolytic preparation and characterization of VCr alloys in molten salt from vanadium slag
Liu, Shiyuan1,2; Wang, Lijun1,3; Chou, Kuo-chih4; Kumar, Ramachandran Vasant3
2019-09-30
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume803Pages:875-881
AbstractVanadium slag contains several critical elements like V, Ti, Cr, Fe and Mn. In our previous work, V and Cr have been enriched by selective chlorination, increasing from 10.05% to 14.95% and 5.84%-8.69% separately. V and Cr still maintain the trivalence state in molten salt. In the current work, the electrodeposition behaviors of V3+ and Cr3+ in NaCl-KCl molten salt at 800 degrees C were investigated using cyclic voltammetry (CV) and square wave voltammetry (SWV) with a tungsten electrode. It was found that the reduction processes of V3+ and Cr3+ consist of two steps, M3+/M2+, M2+/M. The diffusion coefficients of V3+ and Cr3+ in NaCl-KCl molten salt were measured by CV. The effect of VCl3/CrCl3 mass ratio on VCr alloy was investigated by a two-electrode under constant voltage. Pure Cr can be obtained at 2.8 V in the NaCl-KCl molten salt, while VCr alloy (3.71 mass % V-94.28 mass% Cr-2.01 mass % O) was obtained when electrolysis voltage was controlled to 2.8 V at 800 degrees C. The composition of VCr alloy can be designed by changing the molten salt composition. This method can be applied for direct preparation of VCr alloy from vanadium slag, thus offering the use of low cost raw materials with direct environmental benefits. (C) 2019 Published by Elsevier B.V.
KeywordVCr alloy Electrodeposition NaCl-KCl-VCl3-CrCl3 molten salt
DOI10.1016/j.jallcom.2019.06.366
Language英语
WOS KeywordEXTRACTION ; CHROMIUM ; BEHAVIOR ; OXIDES ; ALCL3 ; IRON
Funding ProjectNational Natural Science Foundation of China[51474141] ; National Natural Science Foundation of China[51774027] ; China Postdoctoral Science Foundation[2019M650848]
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China ; China Postdoctoral Science Foundation
WOS IDWOS:000476464900102
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/30367
Collection中国科学院过程工程研究所
Corresponding AuthorWang, Lijun
Affiliation1.Univ Sci & Technol Beijing, Collaborat Innovat Ctr Steel Technol, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
3.Univ Cambridge, Dept Mat Sci & Met, 27 Charles Babbage Rd, Cambridge CB3 0FS, England
4.Univ Sci & Technol Beijing, State Key Lab Adv Met, Beijing 100083, Peoples R China
Recommended Citation
GB/T 7714
Liu, Shiyuan,Wang, Lijun,Chou, Kuo-chih,et al. Electrolytic preparation and characterization of VCr alloys in molten salt from vanadium slag[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,803:875-881.
APA Liu, Shiyuan,Wang, Lijun,Chou, Kuo-chih,&Kumar, Ramachandran Vasant.(2019).Electrolytic preparation and characterization of VCr alloys in molten salt from vanadium slag.JOURNAL OF ALLOYS AND COMPOUNDS,803,875-881.
MLA Liu, Shiyuan,et al."Electrolytic preparation and characterization of VCr alloys in molten salt from vanadium slag".JOURNAL OF ALLOYS AND COMPOUNDS 803(2019):875-881.
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