稀土玻璃废料中稀土及有价元素的回收  

Recovery of Rare Earth and Valuable Elements from Waste Optical Glass

作　　者：袁金秀[1] 许涛[2,3] 秦玉芳[2,3] 刘晓杰[2,3] 于亚辉[2,3] 

机构地区：[1]潍坊科技学院山东半岛蓝色经济工程研究院,山东寿光262700 [2]包头稀土研究院,内蒙古包头014030 [3]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》2016年第3期117-122,共6页Chinese Rare Earths

基　　金：国家环保部公益性行业科研专项(20110949)

摘　　要：研究了一种从某种稀土光学玻璃中回收稀土和铌、锆的湿法工艺。此工艺首先采用盐酸酸浸出稀土,然后加入一定量的碱保持微沸30 min,过滤后得到稀土滤液和铌锆的水解固体。研究了影响稀土浸出的条件,盐酸浓度、温度、浸出时间、液固比和搅拌速率,通过酸浸正交实验得出了这些影响因素的优组合,在优组合的条件下,Y、La、Gd的浸取率分别为100.00%、99.98%、99.96%;盐酸滤液经草酸沉淀、过滤、洗涤、灼烧获得稀土混合氧化物纯度为99.80%,总回收率高达99.6%。水解获得的铌、锆混合物经过草酸溶解、加Na_2CO_3沉淀铌,使铌、锆得到了分离;铌、锆的回收率分别到达91.68%、99.47%。A hydrometallurgical process was performed to recover rare earth elements, niobium and zirconium from a waste optical glass. In this process the hydrochloric acid leaching method was used to extract rare earths. After adding alkali to leac- hing solution, slightly boiling 30min, we could get the rare earth filtrate and hydrolysis solid of zirconium and niobium. Leac- hing rate of rare earth was affected by hydrochloric acid concentration, temperature, leaching time, liquid - solid ratio and stirring rate. The optimal lixiviated condition was obtained in the experiment. Under the optimal combination, the leaching rate of Y, La and Gd was 100.00%, 99.98% and 99.96% , respectively. The rare earth filtrate was precipitated, filtered, washed and calcined, and then rare earth oxide was obtained. Niobium and zirconium hydrolysis mixture was dissolved by H2C2O4. In order to separate zirconium and niobium we had added Na2 CO3 to precipitate niobium. The total recovery was 99. 6% , 89.95% and 99.47% , respectively for rare earth, zirconium and niobium.

关 键 词：稀土光学玻璃废料 稀土 铌 锆 

分 类 号：TF803.21[冶金工程—有色金属冶金]