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Circulation of Sodium Sulfate Solution Produced During NiMH Battery Waste Processing

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Porvali, Antti
dc.contributor.author Agarwal, Vivek
dc.contributor.author Lundström, Mari
dc.date.accessioned 2019-08-15T08:26:18Z
dc.date.available 2019-08-15T08:26:18Z
dc.date.issued 2019-06-12
dc.identifier.citation Porvali , A , Agarwal , V & Lundström , M 2019 , ' Circulation of Sodium Sulfate Solution Produced During NiMH Battery Waste Processing ' , Mining, Metallurgy & Exploration . https://doi.org/10.1007/s42461-019-0086-2 en
dc.identifier.issn 2524-3462
dc.identifier.issn 2524-3470
dc.identifier.other PURE UUID: b021b26f-14ed-48f3-8fc3-4a4e065fcfc8
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/b021b26f-14ed-48f3-8fc3-4a4e065fcfc8
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=85069524553&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/40673709/CHEM_Porvali_et_al_2019_Circulation_of_Sodium_MinMetExp.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/39731
dc.description.abstract Hydrometallurgical recovery of rare earth elements (REE) from NiMH battery waste can be performed using sulfuric acid leaching followed by selective precipitation as double salt (REENa(SO4)2·H2O) by adding Na2SO4 as a precipitating agent. The formed double salts can then be further converted with NaOH solution to form REE hydroxides. However, present literature has paid little attention to how to minimize the consumption of reagents in this recovery process. In the current study, a process model was built using HSC Sim software, and metamodeling of the simulated flowsheet was conducted with the design of experiments (DOE), after which the basic functionality of the flowsheet was verified by experimental work, starting from sulfuric acid leaching of spent batteries. As the process is based on chemical circulation internally in the process, the objective was to investigate the accumulation of the elements in solution, specifically Na+, K+, SO42− ions and impurities liberated in the NaOH conversion step. It was found out that metamodeling could be utilized in obtaining first estimate of the process behavior, prior to any experiments. Flowsheet functionality with circulated solution was confirmed, obtaining at best 96.9% La recovery. en
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher SPRINGER
dc.relation.ispartofseries Mining, Metallurgy & Exploration en
dc.rights openAccess en
dc.title Circulation of Sodium Sulfate Solution Produced During NiMH Battery Waste Processing en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Hydrometallurgy and Corrosion
dc.contributor.department Department of Chemical and Metallurgical Engineering
dc.subject.keyword Battery waste
dc.subject.keyword Flowsheet metamodeling
dc.subject.keyword Hydrometallurgy
dc.subject.keyword Rare earths
dc.subject.keyword Recycling
dc.subject.keyword Response surface methodology
dc.identifier.urn URN:NBN:fi:aalto-201908154776
dc.identifier.doi 10.1007/s42461-019-0086-2
dc.type.version publishedVersion

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