典型文献
One-step separation and recovery of rare earth and iron from NdFeB slurry via phosphoric acid leaching
文献摘要：
The recovery of rare earth elements (REEs) from NdFeB slurry by traditional hydrometallurgy has been limited becuase a large number of REEs are lost during separation together with iron.In this paper,a simple and sustainable method is proposed to efficiently separate and recover REEs and iron from NdFeB slurry.REEs were recovered by one-step selective precipitation in phosphoric acid,and the dissolved iron was recovered by oxalic acid.Phosphoric acid leaching results show that under the conditions of 4 mol/L phosphoric acid,80 ℃,L/S of 30:1 and 90 min,the leaching efficiencies of Fe and REEs reach 98.76％ and 1.09％,respectively.While the rest of REEs remained in the leaching residue in the form of REEPO4·nH2O precipitation.Subsequently,the mixed rare earth oxide (rare earth oxalate roasted at 800 ℃) and FeC2O4·2H2O are obtained by oxalic acid precipitation with purities of 99.49％ and 97.17％ from the REEPO4·nH2O dissolving solution and the phosphoric acid leaching solution.Moreover,the phosphoric acid is regenerated while recovering iron,and it can be reused in the phosphoric acid leaching step after removing the impurity C2O42.In summary,this work provides an efficient and environmentally friendly method for recovering REEs and iron from NdFeB slurry waste.
文献关键词：
中图分类号：
作者姓名：
Ling He;Qipeng Xu;Wensheng Li;Qizheng Dong;Weimin Sun
作者机构：
State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China;School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China
文献出处：
引用格式：
[1]Ling He;Qipeng Xu;Wensheng Li;Qizheng Dong;Weimin Sun-.One-step separation and recovery of rare earth and iron from NdFeB slurry via phosphoric acid leaching)[J].稀土学报（英文版）,2022(02):338-344
A类：
becuase,Phosphoric,REEPO4,purities
B类：
One,step,separation,recovery,rare,earth,from,NdFeB,slurry,via,phosphoric,acid,leaching,elements,REEs,by,traditional,hydrometallurgy,has,been,limited,large,number,lost,during,together,In,this,paper,simple,sustainable,method,proposed,efficiently,separate,were,recovered,one,selective,precipitation,dissolved,oxalic,results,show,that,under,conditions,efficiencies,reach,respectively,While,rest,remained,residue,form,nH2O,Subsequently,mixed,oxide,oxalate,roasted,FeC2O4,2H2O,obtained,dissolving,solution,Moreover,regenerated,while,recovering,can,reused,after,removing,impurity,C2O42,summary,work,provides,environmentally,friendly,waste
AB值：
0.442301
相似文献
机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
