摘要
在NaCl-CaCl_2熔盐体系中采用FFC-剑桥工艺开展了Fe_2O_3电脱氧制备金属Fe的工艺研究。重点研究了烧结工艺和电解工艺等对熔盐中Fe_2O_3电脱氧过程的影响。采用SEM分析了烧结后Fe_2O_3的微观结构,采用XRD分析了电解前后产物的物相组成,得到了优化的电脱氧工艺条件为:槽电压为3.2 V,电解时间为8 h,烧结温度为800~900℃,黏结剂用量为1.5%~2.5%和电解温度为680~722℃。同时,在该熔盐体系中Fe_2O_3电脱氧机理为Fe_2O_3→Fe_3O_4→FeO→Fe。
The electro-deoxidation of Fe2O3 into Fe by FFC-Cambridge process was carried out in the NaCl-CaCl2 molten salt system.The powder sintering process and electrolysis process were highlighted.The microstructure of the Fe2O3 pellet after sintering,and phase composition of the products before and after electrolysis were analyzed by SEM and XRD,respectively.The optimized electro-deoxidation process conditions were as follows:cell voltage of 3.2 V,electrolysis time of 8 h,and sintering temperature of 800~900℃,the binder dosage of 1.5%~2.5%,and the electrolysis temperature of 680~722℃.At the same time,the electrical deoxidation mechanism of Fe2O3 in this molten salt system was determined to be Fe2O3→Fe3O4→FeO→Fe.
作者
王有群
林如山
何辉
王欢
刘云海
WANG Youqun;LIN Rushan;HE Hui;WANG Huan;LIU Yunhai(State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China;Department of Radiochemistry,China Institute of Atomic Energy,Beijing 102413,China)
出处
《有色金属科学与工程》
CAS
2020年第5期39-44,共6页
Nonferrous Metals Science and Engineering
基金
核资源与环境国家重点实验室开放基金资助项目(NRE1813)
国家自然科学基金资助项目(21906017)。
关键词
三氧化二铁
熔盐
电解还原
FFC-剑桥工艺
ferric oxide
molten salt
electrochemical reduction
FFC Cambridge process
