Research on the Methods of Nd2O3 Recovery from Sintered Nd-Fe-B Magnet Waste AITranslate
Abstract AITranslate
Nd2O3 was recovered from the sintered Nd-Fe-B waste with the sulphate double salt precipitation method,the secondary oxalate precipitation method and the phosphate precipitation method.The industrially produced Nd-Fe-B waste was pretreated with sulfuric acid or oxalic acid.After alkalization and acid dissolution,neodymium ions were separated from iron by precipitation with oxalic acid or ammonium carbonate,and finally the crude Nd2O3 product was obtained by calcination.The morphology of Nd2O3 powder was observed by scanning electron microscope,and the purity of Nd2O3 product was determined by EDTA titration and the recovery rate was calculated.The purity and recovery rate of crude Nd2O3 products prepared with different methods are quite different.The purity of Nd2O3 is 74%~92%,the total recovery rate is 24%~29%,and the particle size is 3~200μm.These Nd2O3 products are of irregular shape and relatively high dispersity,and they are multihole and mostly fluffy.Considering the complexity of the process and the purity and recovery rate of Nd2O3,the sulfate double salt precipitation method has advantages in the practical application of Nd2O3 recovery from sintered Nd-Fe-B waste.
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DOI：
Chinese Library Classification Number:TF19[冶金工程—冶金物理化学]
Citation Information:
Nd2O3 was recovered from the sintered Nd-Fe-B waste with the sulphate double salt precipitation method,the secondary oxalate precipitation method and the phosphate precipitation method.The industrially produced Nd-Fe-B waste was pretreated with sulfuric acid or oxalic acid.After alkalization and acid dissolution,neodymium ions were separated from iron by precipitation with oxalic acid or ammonium carbonate,and finally the crude Nd2O3 product was obtained by calcination.The morphology of Nd2O3 powder was observed by scanning electron microscope,and the purity of Nd2O3 product was determined by EDTA titration and the recovery rate was calculated.The purity and recovery rate of crude Nd2O3 products prepared with different methods are quite different.The purity of Nd2O3 is 74%~92%,the total recovery rate is 24%~29%,and the particle size is 3~200μm.These Nd2O3 products are of irregular shape and relatively high dispersity,and they are multihole and mostly fluffy.Considering the complexity of the process and the purity and recovery rate of Nd2O3,the sulfate double salt precipitation method has advantages in the practical application of Nd2O3 recovery from sintered Nd-Fe-B waste.
quote
| GB/T 7714-2015 | [1] TANG Jie, YANG Li-rong, ZHAO Dao-wen, et al. Research on the Methods of Nd2O3 Recovery from Sintered Nd-Fe-B Magnet Waste[J]. Rare Metals and Cemented Carbides, 2020(1): 5-8. |
| MLA | [1] TANG Jie, et al., "Research on the Methods of Nd2O3 Recovery from Sintered Nd-Fe-B Magnet Waste." Rare Metals and Cemented Carbides, no. 1, 2020, pp. 5-8. |
| APA | [1] TANG Jie, YANG Li-rong, ZHAO Dao-wen, ZHANG Lin, & LIU Chang. (2020). Research on the Methods of Nd2O3 Recovery from Sintered Nd-Fe-B Magnet Waste. Rare Metals and Cemented Carbides(1), 5-8. |
| IEEE | [1] TANG Jie, YANG Li-rong, ZHAO Dao-wen, ZHANG Lin, and LIU Chang, "Research on the Methods of Nd2O3 Recovery from Sintered Nd-Fe-B Magnet Waste," Rare Metals and Cemented Carbides, no. 1, pp. 5-8, 2020. keywords: {sintered Nd-Fe-B waste;Nd2O3;recovery method;powder morphology;grain size;purity;recovery rate} |