Separation of Cobalt, Samarium, Iron, and Copper in the Leaching Solution of Scrap Magnets
With the growing awareness of protecting the urban environment and the increasing demand for strategic materials, recycling of SmCo magnets has become imperative. This paper provides a series of methods regarding the available hydrometallurgical technologies for recycling scrap magnets. This study a...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/1/90 |
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| author | Jian-Zhi Wang Yi-Hsun Hsieh Yi-Chin Tang Yun-Hwei Shen |
| author_facet | Jian-Zhi Wang Yi-Hsun Hsieh Yi-Chin Tang Yun-Hwei Shen |
| author_sort | Jian-Zhi Wang |
| collection | DOAJ |
| description | With the growing awareness of protecting the urban environment and the increasing demand for strategic materials, recycling of SmCo magnets has become imperative. This paper provides a series of methods regarding the available hydrometallurgical technologies for recycling scrap magnets. This study aimed to recover samarium (Sm), cobalt (Co), copper (Cu), and iron (Fe) from acid leachate of SmCo scrap by using precipitation and ion exchange. IRC748 showed a good adsorption capacity for Fe and Cu. Elution tests were conducted using sulfuric acid at the concentration of 2N as eluents. Precipitation was performed first using a selective chemical precipitation method, and the Sm was first precipitated as a sodium samarium sulfate powder. Then, the samarium-deprived solution was placed in the beaker, and the addition of oxalic acid promoted cobalt oxalate precipitation. Furthermore, the leachate, which is rich in Cu and Fe, was mixed with oxalic acid to obtain the copper oxalate precipitation. This study successfully recovered SmCo magnets through ion exchange and precipitants. |
| first_indexed | 2024-03-09T11:42:52Z |
| format | Article |
| id | doaj.art-cd1c5cdac48049caa18bac43d6012e48 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T11:42:52Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
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| series | Metals |
| spelling | doaj.art-cd1c5cdac48049caa18bac43d6012e482023-11-30T23:30:36ZengMDPI AGMetals2075-47012022-12-011319010.3390/met13010090Separation of Cobalt, Samarium, Iron, and Copper in the Leaching Solution of Scrap MagnetsJian-Zhi Wang0Yi-Hsun Hsieh1Yi-Chin Tang2Yun-Hwei Shen3Department of Resources Engineering, National Cheng Kung University, Tainan 70101, TaiwanDepartment of Resources Engineering, National Cheng Kung University, Tainan 70101, TaiwanDepartment of Resources Engineering, National Cheng Kung University, Tainan 70101, TaiwanDepartment of Resources Engineering, National Cheng Kung University, Tainan 70101, TaiwanWith the growing awareness of protecting the urban environment and the increasing demand for strategic materials, recycling of SmCo magnets has become imperative. This paper provides a series of methods regarding the available hydrometallurgical technologies for recycling scrap magnets. This study aimed to recover samarium (Sm), cobalt (Co), copper (Cu), and iron (Fe) from acid leachate of SmCo scrap by using precipitation and ion exchange. IRC748 showed a good adsorption capacity for Fe and Cu. Elution tests were conducted using sulfuric acid at the concentration of 2N as eluents. Precipitation was performed first using a selective chemical precipitation method, and the Sm was first precipitated as a sodium samarium sulfate powder. Then, the samarium-deprived solution was placed in the beaker, and the addition of oxalic acid promoted cobalt oxalate precipitation. Furthermore, the leachate, which is rich in Cu and Fe, was mixed with oxalic acid to obtain the copper oxalate precipitation. This study successfully recovered SmCo magnets through ion exchange and precipitants.https://www.mdpi.com/2075-4701/13/1/90SmCo<sub>5</sub> magnetion exchangeirc748samarium precipitationcobalt precipitationcopper precipitation |
| spellingShingle | Jian-Zhi Wang Yi-Hsun Hsieh Yi-Chin Tang Yun-Hwei Shen Separation of Cobalt, Samarium, Iron, and Copper in the Leaching Solution of Scrap Magnets Metals SmCo<sub>5</sub> magnet ion exchange irc748 samarium precipitation cobalt precipitation copper precipitation |
| title | Separation of Cobalt, Samarium, Iron, and Copper in the Leaching Solution of Scrap Magnets |
| title_full | Separation of Cobalt, Samarium, Iron, and Copper in the Leaching Solution of Scrap Magnets |
| title_fullStr | Separation of Cobalt, Samarium, Iron, and Copper in the Leaching Solution of Scrap Magnets |
| title_full_unstemmed | Separation of Cobalt, Samarium, Iron, and Copper in the Leaching Solution of Scrap Magnets |
| title_short | Separation of Cobalt, Samarium, Iron, and Copper in the Leaching Solution of Scrap Magnets |
| title_sort | separation of cobalt samarium iron and copper in the leaching solution of scrap magnets |
| topic | SmCo<sub>5</sub> magnet ion exchange irc748 samarium precipitation cobalt precipitation copper precipitation |
| url | https://www.mdpi.com/2075-4701/13/1/90 |
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