摘要
室温(5~35℃)下,采用筛选、湿法磁选、酸化、草酸沉淀和焙烧等工序对镨钕金属抛光废料中的稀土、氟和铁进行回收循环利用。此方法得到的氧化镨钕和氟化镨钕具有较高的纯度,且稀土、氟和铁均具有较高的回收率,稀土的回收率为96%以上,氟的回收率为90%以上,铁的回收率为93%以上。回收处理酸不溶物过程中产生的废酸和水洗筛上料的粉尘和洗水均可返回下批料的处理中得以回收利用。整套工艺既可实现二次资源的利用,又无废渣的产生,节省生产成本的同时解决了环保中的废渣问题。本工艺提供的镨钕金属抛光废料回收处理方法简单易操作,易于工业化。
At room temperature(5~35 ℃),rare earths,fluorine and iron in Pr-Nd metal polished waste were recovered and recycled by screening,wet magnetic separation,acidification,oxalic acid precipitation and roasting.The obtained Pr-Nd oxide and Pr-Nd fluoride exhibit high purity,and the recovery rates of rare earths,fluorine,and iron are also high.The recovery rate of rare earths exceeds 96%,fluorine 90%,and iron 93%.The waste acid produced in the process of recovering the acid insolubles and the dust and washing water produced in the process of washing sieve oversize can be recycled in the treatment of the next batch.The whole process not only realizes the secondary resource utilization,but also produces no waste residue,saving the production costs and solving the problem of waste residue in environmental protection.The recovery and treatment method of Pr-Nd metal polished waste proposed by this process is simple and easy to operate and industrialize.
作者
郑艳玲
邱小英
葛刘生
肖莉
ZHENG Yan-ling;QIU Xiao-Ying;GE Liu-sheng;XIAO Li(Jiangxi Ionic Rare Earth Engineering Technology Research Co.,Ltd.,Ganzhou 34100l,China;National Engineering Technology Research Center for Efficient Development and Utilization of Ionic Rare Earth Resources,Ganzhou 34100l,China)
出处
《稀有金属与硬质合金》
CAS
CSCD
北大核心
2023年第4期8-12,共5页
Rare Metals and Cemented Carbides
关键词
镨钕金属抛光废料
回收
稀土
氧化镨钕
氟化镨钕
铁珠(粉)
Pr-Nd metal polished waste
recovery
rare earth
Pr-Nd oxide
Pr-Nd fluoride
iron bead(pow-der)
