摘要
采用离子液体1-乙基-3-甲基咪唑氯铝酸盐为电解质,对原铝的低温电解精炼反应进行研究。根据电化学测试结果,系统考察了原铝中各主要元素的氧化过程,证明铝与主要杂质元素在离子液体中具有明显不同的初始氧化电位,能够通过恒电位电解法对原铝进行精炼提纯。在此基础上,通过两步电解法完成了杂质的高效分离,获得了最佳的反应条件。结果表明,经过0.2~0.4V和40~80℃下的电解精炼反应,可以得到纯度高于99.95%的精铝。
Low-temperature electrorefining of primary aluminum in ionic liquid 1-ethyl-3-methylimidazolium chloroaluminate was carried out.Oxidation process of main elements of primary aluminum was investigated by electrochemical measurements which demonstrated that onset oxidation potential of aluminum was different from those of impurity elements,which facilitated electrorefining of primary aluminum under constant potential.On this basis,separation of impurities was completed with high efficiency by two-step electrolysis method and the optimum experimental conditions were obtained.The results show that highpurity aluminum with mass content higher than 99.95%can be obtained at 0.2~0.4 Vand 40~80 ℃ by electrorefining.
作者
郑勇
郑永军
王振
牛永生
ZHENG Yong;ZHENG Yong-jun;WANG Zhen;NIU Yong-sheng(Department of Chemical and Environmental Engineering,Anyang Institute of Technology,Anyang 455000,Henan,China)
出处
《有色金属（冶炼部分）》
CAS
北大核心
2020年第5期51-55,共5页
Nonferrous Metals（Extractive Metallurgy)
基金
国家自然科学基金资助项目(21406002,21702005)
河南省高等学校青年骨干教师培养计划(2017GGJS175)。
关键词
原铝
离子液体
电解精炼
低温熔盐
primary aluminum
ionic liquid
electrorefining
low-temperature molten salts
作者简介
郑勇(1983-),男,博士,副教授。
