Leaching kinetics of neodymium in sulfuric acid from E-scrap of NdFeB permanent magnet
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Yoon, Ho-Sung | - |
dc.contributor.author | Kim, Chul-Joo | - |
dc.contributor.author | Chung, Kyeong Woo | - |
dc.contributor.author | Lee, Su-Jeong | - |
dc.contributor.author | Joe, A-Ram | - |
dc.contributor.author | Shin, Yang-Ho | - |
dc.contributor.author | Lee, Se-Il | - |
dc.contributor.author | Yoo, Seung-Joon | - |
dc.contributor.author | Kim, Jin-Geol | - |
dc.date.accessioned | 2021-08-11T22:47:19Z | - |
dc.date.available | 2021-08-11T22:47:19Z | - |
dc.date.issued | 2014-04 | - |
dc.identifier.issn | 0256-1115 | - |
dc.identifier.issn | 1975-7220 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/12295 | - |
dc.description.abstract | The leaching kinetics of neodymium in NdFeB permanent magnet powder was analyzed for the purpose of recovery of neodymium in sulfuric acid (H2SO4) from E-scrap (electric scrap) of NdFeB permanent magnet powder treated by oxidation roasting to form a reactant. The reaction was conducted with H2SO4 concentrations ranging from 2.5 to 3.5M, a pulp density of 110.8 g/L, an agitation speed of 750 rpm, and a temperature range of 30 to 70 A degrees C. After 4 h of leaching, the neodymium content in the E-scrap powders was completely converted into a neodymium sulfate (Nd-2(SO4)(3)) solution phase in H2SO4 in the condition of 70 A degrees C and 3.0M H2SO4. Based on a shrinking core model with sphere shape, the leaching mechanism of neodymium was determined by the rate-determining step of the ash layer diffusion. Generally, the solubility of pure rare earth elements in H2SO4 is decreased with an increase in leaching temperatures. However, the leaching rate of the neodymium in E-scrap powders increased with the leaching temperatures in this study because the ash layer included in the E-scrap powder provided resistance against the leaching. Using the Arrhenius expression, the apparent activation energy values were determined to be 2.26 kJmol(-1) in 2.5M H2SO4 and 2.77 kJmol(-1) in 3.0 M H2SO4. | - |
dc.format.extent | 6 | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | 한국화학공학회 | - |
dc.title | Leaching kinetics of neodymium in sulfuric acid from E-scrap of NdFeB permanent magnet | - |
dc.type | Article | - |
dc.publisher.location | 대한민국 | - |
dc.identifier.doi | 10.1007/s11814-013-0259-5 | - |
dc.identifier.scopusid | 2-s2.0-84897572034 | - |
dc.identifier.wosid | 000334177800023 | - |
dc.identifier.bibliographicCitation | Korean Journal of Chemical Engineering, v.31, no.4, pp 706 - 711 | - |
dc.citation.title | Korean Journal of Chemical Engineering | - |
dc.citation.volume | 31 | - |
dc.citation.number | 4 | - |
dc.citation.startPage | 706 | - |
dc.citation.endPage | 711 | - |
dc.type.docType | Article | - |
dc.identifier.kciid | ART001859541 | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.description.journalRegisteredClass | kci | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Engineering, Chemical | - |
dc.subject.keywordAuthor | NdFeB Permanent Magnet | - |
dc.subject.keywordAuthor | Leaching | - |
dc.subject.keywordAuthor | E-scrap | - |
dc.subject.keywordAuthor | Neodymium Sulfate | - |
dc.subject.keywordAuthor | Ash Layer Diffusion | - |
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
(31538) 22, Soonchunhyang-ro, Asan-si, Chungcheongnam-do, Republic of Korea+82-41-530-1114
COPYRIGHT 2021 by SOONCHUNHYANG UNIVERSITY ALL RIGHTS RESERVED.
Certain data included herein are derived from the © Web of Science of Clarivate Analytics. All rights reserved.
You may not copy or re-distribute this material in whole or in part without the prior written consent of Clarivate Analytics.