非接触式熔融还原法制备金属镍  

Preparation of nickel by non-contacting smelting reduction method

作　　者：孙长余[1] 郭兴敏[1] 李菲[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《中国有色金属学报》2010年第10期2045-2050,共6页The Chinese Journal of Nonferrous Metals

基　　金：国家高技术研究发展计划资助项目(2006AA06Z125);国家自然科学基金资助项目(50574011)

摘　　要：采用非接触式熔融还原法,以氧化镁部分稳定的氧化锆管作为氧离子渗透膜,将阴极与阳极分隔开,分批向阴极一侧(熔渣)加入氧化亚镍,在阳极(碳饱和铁水)补充碳还原剂,进行连续制备无碳金属镍的实验研究。结果表明:金属镍沉积在液态阴极上面,以金属单质形式存在,可以通过机械或熔分方法来分离;升高反应温度和增大金属氧化物加入量有利于还原反应的进行,按加入1gNiO外电路电流降至100mA通过电量计算,反应温度从1743K升高到1773K,加入1g和2gNiO还原时间分别缩短54min和18min,而两个温度下NiO加入量增加后,还原时间缩短近一半。A non-contacting carbothermic smelting reduction method was used to investigate reduction of nickel oxide to nickel by adding nickel oxide into cathode and carbon into anode respectively under changing conditions of reaction temperature and quantity added.The results show that pure nickel is obtained on a melt of silver as the cathode,which can be separated with silver by a machinery method or re-melting method,and the deposited rate of the pure nickel increase with increases of the reaction temperature and the quantity added to the cathode,in which it can be obtained according to calculate the accumulated electric quantity of ex-circuit for reduction of 1 g NiO until the current lowered down to 100 mA that the reduction time of 1 g NiO and 2 g NiO decreased 54 min and 18 min respectively from 1 743 K to 1 773 K,and decreased about half after added 2 g comparing with 1 g at same temperature.

关 键 词：镍 氧化亚镍 非接触式熔融还原 氧离子渗透膜 

分 类 号：TF111.15[冶金工程—冶金物理化学]