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
发表期刊TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN1003-6326
卷号28期号:2页码:376-384
摘要The 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.
关键词Electrolysis Chromium Chromium Oxide Cacl2-nacl Molten Salt
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/S1003-6326(18)64671-0
收录类别SCI
语种英语
关键词[WOS]MOLTEN CALCIUM-CHLORIDE ; DIRECT ELECTROCHEMICAL REDUCTION ; SOLID NB2O5 ; DEOXIDATION ; POWDER ; OXIDE ; TITANIUM ; NIOBIUM ; ALLOY ; TA2O5
WOS研究方向Metallurgy & Metallurgical Engineering
WOS类目Metallurgy & Metallurgical Engineering
项目资助者National Basic Research Program of China(2013CB632600) ; National Natural Science Foundation of China(21376251 ; Fund of Hubei Zhenhua Chemical Co., Ltd., China ; 21406233)
WOS记录号WOS:000425550900019
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/24018
专题湿法冶金清洁生产技术国家工程实验室
作者单位1.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
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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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