| 简介 |
PROBLEM TO BE SOLVED : To recover mixed rare earth metals having a stable composition and containing impurities in a lesser amount from scrap containing the mixed rear earth elements included with middle-heavy rear earth elements. SOLUTION : The mixed rare earth oxide obtained through acid treatment, oxalate or carlonate precipitation and firing from the scrap described above is electrolyzed in a molten flouride bath consisting of lithium fluoride and rear earth fluoride, by which the mixed rare earth metals are recovered. The total content of the light rear earth elements of the oxide to be subjected to the electrolysis is so regulated as to be kept within a range of 92 to 98 mass% of the total rear earth element content. The rear earth fluoride in the electrolyzing bath preferably contains the same elements as the rear earth elements in the mixed rare earth oxide. |
客服热线：
手机版
二维码
