Knowledge Management System Of Institute of process engineering,CAS
| Extraction of rare earth and cobalt from leach residue of Nd-Fe-B waste by reductive leaching with iron powder | |
| Du, Haojie1,3; Wang, Dong1,2; Zhang, Liping2; Li, Wentao1,3; Wang, Zhi1,3; Xiao, Wanhai2; Ye, Chunlin4 | |
| 2022-08-01 | |
| Source Publication | HYDROMETALLURGY
 |
| ISSN | 0304-386X |
| Volume | 213Pages:12 |
| Abstract | After recovering rare earth from neodymium-iron-boron (Nd-Fe-B) magnet waste via oxidation roasting-hydrochloric acid leaching, extracting rare earths and cobalt from remaining leach residue, containing about 0.67% (w/w) RE and 0.36% Co, is environmentally and economically important. However, extracting valuable elements from low-grade minerals remains challenging. The purpose of this study is to accelerate the dissolution of rare earths and cobalt from leach residue of Nd-Fe-B waste (MWLR) under low acidity by adding iron as a reductant, which is conducive to destroying the main phase iron oxide. To optimize the leaching process of MWLR in a sulfuric acid system, the effects of reaction temperature, reaction time, sulfuric acid dosage, solid/liquid (S/L) ratio, reductant addition time and reductant dosage were investigated. Circa 87.9% Fe, 99.7% Co, 99.4% Nd, 73.2% Pr and 87.9% Ce were leached. Furthermore, kinetic results indicated that the leaching process, controlled by a combination of internal diffusion and surface chemical reaction, changed to a surface chemical reaction control in the presence of Fe added as the reductant. This research proposed and verified a way to extract low-grade rare earths and cobalt from MWLR, and investigated the mechanism of reductive leaching process. |
| Keyword | Nd-Fe-B waste Rare earth Cobalt Reductive leaching Leaching kinetics |
| DOI | 10.1016/j.hydromet.2022.105942 |
| Language | 英语 |
| WOS Keyword | KINETICS ; RECOVERY ; MAGNETS ; PRETREATMENT ; METALS ; ORE |
| Funding Project | National Key R&D Program of China[2020YFC1909004] ; National Natural Science Foundation of China[51974286] ; Key Research Program of the Chinese Academy of Sciences[ZDRW-CN-2021-3-1-13] ; self-deployed Projects of Ganjiang Innovation Academy, Chinese Academy of Sciences[E055A002] |
| WOS Research Area | Metallurgy & Metallurgical Engineering |
| WOS Subject | Metallurgy & Metallurgical Engineering |
| Funding Organization | National Key R&D Program of China ; National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; self-deployed Projects of Ganjiang Innovation Academy, Chinese Academy of Sciences |
| WOS ID | WOS:000884761400004 |
| Publisher | ELSEVIER |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/55635 |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Wang, Dong; Wang, Zhi |
| Affiliation | 1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Res Ctr Green Recycling Strateg Met Res, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Ganjiang Innovat Acad, Beijing 341119, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100039, Peoples R China 4.China Southern Rare Earth Grp Co Ltd, Ganzhou 341000, Peoples R China |
| Recommended Citation GB/T 7714 | Du, Haojie,Wang, Dong,Zhang, Liping,et al. Extraction of rare earth and cobalt from leach residue of Nd-Fe-B waste by reductive leaching with iron powder[J]. HYDROMETALLURGY,2022,213:12. |
| APA | Du, Haojie.,Wang, Dong.,Zhang, Liping.,Li, Wentao.,Wang, Zhi.,...&Ye, Chunlin.(2022).Extraction of rare earth and cobalt from leach residue of Nd-Fe-B waste by reductive leaching with iron powder.HYDROMETALLURGY,213,12. |
| MLA | Du, Haojie,et al."Extraction of rare earth and cobalt from leach residue of Nd-Fe-B waste by reductive leaching with iron powder".HYDROMETALLURGY 213(2022):12. |
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