Rinse water regeneration in stainless steel pickling

Since stainless steel must be rinsed with water after pickling operation with mixtures of nitric and hydrofluoric acids, the present investigation was undertaken to define a major step towards the close loop circulation of water in steel plant. This can be done by a new procedure for removing also n...

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Autores: Schmidta, Burkhard, Woltersa, Ralf, Kaplin, Jyri, Schneiker, Thorsten, Lobo-Recio, María de los Angeles, López Gómez, Félix Antonio, López-Delgado, Aurora, Alguacil, Francisco José
Tipo de recurso: artículo
Fecha de publicación:2007
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/36438
Acceso en línea:http://hdl.handle.net/10261/36438
Access Level:acceso abierto
Palabra clave:Stainless steel
Pickling
Rinse water
Regeneration
Membranes
Ion exchange
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spelling Rinse water regeneration in stainless steel picklingSchmidta, BurkhardWoltersa, RalfKaplin, JyriSchneiker, ThorstenLobo-Recio, María de los AngelesLópez Gómez, Félix AntonioLópez-Delgado, AuroraAlguacil, Francisco JoséStainless steelPicklingRinse waterRegenerationMembranesIon exchangeSince stainless steel must be rinsed with water after pickling operation with mixtures of nitric and hydrofluoric acids, the present investigation was undertaken to define a major step towards the close loop circulation of water in steel plant. This can be done by a new procedure for removing also nitrates from rinse water in such a way that clean water can be recycled back to rinsing use. The concentrated part of used rinse water will be fed to pickling acid regeneration plant, where nitric and hydrofluoric acids can be separate and recycled back to the pickling use. The tests were carried out mainly in one of Outokumpu’s production plants in Sweden. Membrane technique was used for rinse water treatment. A filtering system based on reverse osmosis was developed to separate the acids and metals from the rinsing water. A pre-filtering method necessary for reverse osmosis was tested. Since the composition of permeate is not applicable for direct reusage in the rinsing zone, post-treatment methods were examined. Amberlite IRA67 ion exchange resin was tested for treatment of reverse osmosis filtrate (pH adjustment). For the recovery of the mixed acids, the concentrate of reverse osmosis was further treated with electrodialysis. On the basis of these results, a regeneration concept was developed, in order to close the rinse water loop. The proposed rinse water recycling concept reduces the overall usage of water.Authors wished to thank to the Research Fund for Coal and Steel for contract 7210-PR/301 (01.E/06).Peer reviewedElsevier201120112007info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/36438reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.desal.2006.03.591info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/364382026-05-22T06:33:51Z
dc.title.none.fl_str_mv Rinse water regeneration in stainless steel pickling
title Rinse water regeneration in stainless steel pickling
spellingShingle Rinse water regeneration in stainless steel pickling
Schmidta, Burkhard
Stainless steel
Pickling
Rinse water
Regeneration
Membranes
Ion exchange
title_short Rinse water regeneration in stainless steel pickling
title_full Rinse water regeneration in stainless steel pickling
title_fullStr Rinse water regeneration in stainless steel pickling
title_full_unstemmed Rinse water regeneration in stainless steel pickling
title_sort Rinse water regeneration in stainless steel pickling
dc.creator.none.fl_str_mv Schmidta, Burkhard
Woltersa, Ralf
Kaplin, Jyri
Schneiker, Thorsten
Lobo-Recio, María de los Angeles
López Gómez, Félix Antonio
López-Delgado, Aurora
Alguacil, Francisco José
author Schmidta, Burkhard
author_facet Schmidta, Burkhard
Woltersa, Ralf
Kaplin, Jyri
Schneiker, Thorsten
Lobo-Recio, María de los Angeles
López Gómez, Félix Antonio
López-Delgado, Aurora
Alguacil, Francisco José
author_role author
author2 Woltersa, Ralf
Kaplin, Jyri
Schneiker, Thorsten
Lobo-Recio, María de los Angeles
López Gómez, Félix Antonio
López-Delgado, Aurora
Alguacil, Francisco José
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Stainless steel
Pickling
Rinse water
Regeneration
Membranes
Ion exchange
topic Stainless steel
Pickling
Rinse water
Regeneration
Membranes
Ion exchange
description Since stainless steel must be rinsed with water after pickling operation with mixtures of nitric and hydrofluoric acids, the present investigation was undertaken to define a major step towards the close loop circulation of water in steel plant. This can be done by a new procedure for removing also nitrates from rinse water in such a way that clean water can be recycled back to rinsing use. The concentrated part of used rinse water will be fed to pickling acid regeneration plant, where nitric and hydrofluoric acids can be separate and recycled back to the pickling use. The tests were carried out mainly in one of Outokumpu’s production plants in Sweden. Membrane technique was used for rinse water treatment. A filtering system based on reverse osmosis was developed to separate the acids and metals from the rinsing water. A pre-filtering method necessary for reverse osmosis was tested. Since the composition of permeate is not applicable for direct reusage in the rinsing zone, post-treatment methods were examined. Amberlite IRA67 ion exchange resin was tested for treatment of reverse osmosis filtrate (pH adjustment). For the recovery of the mixed acids, the concentrate of reverse osmosis was further treated with electrodialysis. On the basis of these results, a regeneration concept was developed, in order to close the rinse water loop. The proposed rinse water recycling concept reduces the overall usage of water.
publishDate 2007
dc.date.none.fl_str_mv 2007
2011
2011
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/36438
url http://hdl.handle.net/10261/36438
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.desal.2006.03.591
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.811543

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