Separation rare earth oxide and CaF2 by citric acid coordination

• 作 者: XueBian[1]JianliChen[2]ZhihuaZhao[2]ShaohuaYin[1]WenyuanWu[1]GanfengTu[1]
• 机 构: Northeastern University of China School of Materials & Metallurgy, Shenyang Liaoning 110004, P.R.Chi
• 出 处: 第五届国际湿法冶金学术会议(5th International Conference on Hydrometallurg
• 发表日期: 2009年期

　　In process of rare earth recovery, CaF2 makes the loss of rare earth as REF3.In order to separate the rare earth and CaF2, the leach of rare earth oxide containing CaF2 is studied, and the citric acid is used to inhibit CaF2 dissolution.The leaching technology parameters are studied.The results show that, the inhibition ratio of CaF2 increases obviously with increasing of citric acid concentration.The leaching ratio of CaF2 decreases 61%, when citric acid concentration increases to 0.25 mol·L-1.