摘要
设计了下阴极结构的稀土金属电解槽,该电解槽底部以钨材料为容器兼阴极,上部悬挂多块石墨作阳极,在NdF3-LiF-Nd2O3体系中,探索研究了液态下阴极电解制备金属钕的工艺技术条件。研究表明,在槽温990～1020℃,阴极电流密度1～3 A.cm-2,槽电压5.6 V条件下,电解可平稳进行,电流效率达65.64%,稀土回收率达88%～92%;该工艺与目前主流上插阴极电解工艺相比,其电解温度和槽电压明显降低,降低了电耗。
Tungsten was usually used as a cathode electrode positioned in the electrolyte, in this paper a tungsten sheet was set on the surface of bottom of the cell container, and melted neodymium as a liquidcathode, furthermore graphite anode hanged overhead of the cathode. In NdF3-LiF-Nd2O3 molten, the neodymium obtained at a low electric current density and cell voltage below 5.6 V. The electric current efficiency increased with the raising of cathode electric current density, and reduced with the raising of temperature and anode electric current density. The results show that the cell temperature and cathode electric current density in the new designed cell were lower than the traditional one.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2009年第2期302-305,共4页
Journal of the Chinese Society of Rare Earths
关键词
氟盐体系
金属钕
熔盐电解
下阴极
稀土
villiaumite system
neodymium
fused salt electrolysis
liquid-cathode
rare earths
