熔盐电解法制备镨钕镝合金的研究  

Preparation of Pr-Nd-Dy Alloys by Molten Salt Electrolysis

作　　者：陈国华[1,2] 王小青[1,2] 刘玉宝[1,2] 赵二雄 于兵[1,2] 李坤[1,2] 

机构地区：[1]包头稀土研究院,内蒙古包头014030 [2]瑞科稀土冶金及功能材料国家工程研究中心,内蒙古包头014030

出　　处：《稀土》2015年第1期80-84,共5页Chinese Rare Earths

基　　金：包头市科技创新体系建设项目资助(2011C1002-26)

摘　　要：利用4000 A电解槽,在氟化锂-氟化镨钕-氟化镝熔盐体系中,通过电解氧化镝与氧化镨钕的方法,制备了成分稳定的镨钕镝合金,金属直收率大于96%,电流效率大于75%。讨论了电解质组元、温度、阴极电流密度、加料速度对电解过程的影响。同时与钙热法生产金属镝、自耗阴极制备镝铁合金工艺进行综合性对比分析,结果表明,熔盐电解法在成本、工艺稳定、产品质量等方面具有绝对的优势。By Using 4000 A electrolysis cell,in lithium fluoride-praseodymium neodymium fluoride-dysprosium fluoride molten salt system,Pr-Nd-Dy alloys were prepared with the method of electrolysis of dysprosium oxide and praseodymium neodymium oxide. Direct metal yield is greater than 96%,and current efficiency is greater than 75%. The effect of electrolyte components,temperature,cathode current density,feeding speed on the electrolytic process was discussed. At the same time,the process was compared with calciothermy for producing dysprosium metal and consumable cathode for preparing Dy-Fe Alloy.The results showed that the molten salt electrolysis method has advantages in cost,process stability and product quality.

关 键 词：熔盐电解 镨钕镝合金 电流效率 收率 

分 类 号：TF803.4[冶金工程—有色金属冶金]