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Direct electrolytic preparation of chromium metal in CaCl2-NaCl eutectic salt
Liu, Zheng-wei1,2,3; Zhang, Hong-ling1,2; Pei, Li-li1,2; Shi, Yi-lang4; Cai, Zai-hua4; Xu, Hong-bin1,2; Zhang, Yi1,2
2018-02-01
Source PublicationTRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN1003-6326
Volume28Issue:2Pages:376-384
AbstractThe electro-reduction of chromium oxide (Cr2O3) was investigated in an equimolar mixture of CaCl2-NaCl molten salt at 800 degrees C for developing a more efficient process for chromium preparation. Cyclic voltammetry and potentiostatic electrolysis were used to study the electro-reduction of the Cr2O3-loaded metallic cavity electrode. In addition, a number of parameters affecting the rate and extent of Cr2O3 electrolysis were considered to better understand the electrolysis process. The results demonstrate that CaCl2-NaCl molten salt is applicable for preparing Cr directly from Cr2O3 and the electrolysis parameters exert great influence on the cathode product. Under optimal experimental conditions, nodular Cr with an oxygen content of 0.5% (mass fraction) was obtained without any chromium carbides detected by XRD. Furthermore, the relatively high solubility of CaO and quite rapid crystal growth result in the formation of large platelet CaCr2O4, and the addition of NaCl to CaCl2 results in several variations on the electrolysis process and the product morphology from pure CaCl2 molten salt.
KeywordElectrolysis Chromium Chromium Oxide Cacl2-nacl Molten Salt
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/S1003-6326(18)64671-0
Indexed BySCI
Language英语
WOS KeywordMOLTEN CALCIUM-CHLORIDE ; DIRECT ELECTROCHEMICAL REDUCTION ; SOLID NB2O5 ; DEOXIDATION ; POWDER ; OXIDE ; TITANIUM ; NIOBIUM ; ALLOY ; TA2O5
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
Funding OrganizationNational Basic Research Program of China(2013CB632600) ; National Natural Science Foundation of China(21376251 ; Fund of Hubei Zhenhua Chemical Co., Ltd., China ; 21406233)
WOS IDWOS:000425550900019
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/24018
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Hubei Zhenhua Chem Co Ltd, Huangshi 435001, Peoples R China
Recommended Citation
GB/T 7714
Liu, Zheng-wei,Zhang, Hong-ling,Pei, Li-li,et al. Direct electrolytic preparation of chromium metal in CaCl2-NaCl eutectic salt[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2018,28(2):376-384.
APA Liu, Zheng-wei.,Zhang, Hong-ling.,Pei, Li-li.,Shi, Yi-lang.,Cai, Zai-hua.,...&Zhang, Yi.(2018).Direct electrolytic preparation of chromium metal in CaCl2-NaCl eutectic salt.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,28(2),376-384.
MLA Liu, Zheng-wei,et al."Direct electrolytic preparation of chromium metal in CaCl2-NaCl eutectic salt".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 28.2(2018):376-384.
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