dc.contributor.author | Ekstrøm, Kai Erik | |
dc.contributor.author | Bugten, Andreas Voll | |
dc.contributor.author | Eijk, Casper van der | |
dc.contributor.author | Lazou, Adamantia | |
dc.contributor.author | Balomenos, E. | |
dc.contributor.author | Tranell, Gabriella | |
dc.date.accessioned | 2022-01-03T07:58:53Z | |
dc.date.available | 2022-01-03T07:58:53Z | |
dc.date.created | 2021-09-03T15:52:19Z | |
dc.date.issued | 2021 | |
dc.identifier.citation | Journal of Sustainable Metallurgy. 2021, 7 1314-1326. | en_US |
dc.identifier.issn | 2199-3823 | |
dc.identifier.uri | https://hdl.handle.net/11250/2835693 | |
dc.description.abstract | The recovery of major components of bauxite residue by carbothermic reduction at 1550–1750 °C and subsequent slag leaching in a Na3CO3(aq) solution is studied. Iron recovers primarily to pig-iron and lime is added to tune the calcium aluminate slags towards the highly leachable mayenite phase. The concentration of aluminum in the leachate correlates well with the occurrence of mayenite and aluminum recoveries up to 50–60% are observed. However, slags with low CaO additions are vulnerable to gehlenite formation and display reduced leachabilities. Formation of an inhibiting layer of CaCO3(s) on the reaction surface of calcium-aluminate particles during leaching and immobilization of aluminum in CaTiO3(s) are also suggested to play important roles in limiting the aluminum leachability. Costs related to post-processing may be reduced by achieving disintegrating slags, a behavior which is observed for slags holding high γ- to β-Ca2SiO4 ratios. The disintegration is caused by the large volume expansion associated with the β-to-γ transformation and as such, various factors that are known to stabilize the β-polymorph are discussed. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Springer | en_US |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Recovery of Iron and Aluminum from Bauxite Residue by Carbothermic Reduction and Slag Leaching | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.source.pagenumber | 1314-1326 | en_US |
dc.source.volume | 7 | en_US |
dc.source.journal | Journal of Sustainable Metallurgy | en_US |
dc.identifier.doi | 10.1007/s40831-021-00422-7 | |
dc.identifier.cristin | 1931237 | |
dc.description.localcode | Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |