Characterization of stainless steel spent pickling sludge and prospects for its valorization
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | https://hdl.handle.net/1822/79643 |
Resumo: | Fluorspar is considered a critical raw material for the European Union, due to its industrial uses and lack of sufficient extraction in European countries. It is a source for hydrofluoric acid manufacture, this latter chemical being employed, among other uses, in the pickling of stainless steels. From this latter activity, sludge is generated due to the need for used water treatment. In this article, we report a full characterization of this residue, obtained in an industrial plant in Vieira de Leiria, Portugal. Its chemical and mineralogical characteristics were determined, showing that it is mostly a mixture of calcium fluoride and calcium sulfate with some heavy metals content. Thermal behavior allowed us to determine that the material melts at around 950 ◦C. The influence of calcining operation on the residue was determined, especially concerned with the leachability of some elements. Taking into account the results of the characterization of this residue, some considerations are presented about the potential for the valorization of this industrial residue. |
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Characterization of stainless steel spent pickling sludge and prospects for its valorizationStainless steel spent pickling sludgeFluorsparCritical raw materialResidueEngenharia e Tecnologia::Engenharia dos MateriaisScience & TechnologyProdução e consumo sustentáveisFluorspar is considered a critical raw material for the European Union, due to its industrial uses and lack of sufficient extraction in European countries. It is a source for hydrofluoric acid manufacture, this latter chemical being employed, among other uses, in the pickling of stainless steels. From this latter activity, sludge is generated due to the need for used water treatment. In this article, we report a full characterization of this residue, obtained in an industrial plant in Vieira de Leiria, Portugal. Its chemical and mineralogical characteristics were determined, showing that it is mostly a mixture of calcium fluoride and calcium sulfate with some heavy metals content. Thermal behavior allowed us to determine that the material melts at around 950 ◦C. The influence of calcining operation on the residue was determined, especially concerned with the leachability of some elements. Taking into account the results of the characterization of this residue, some considerations are presented about the potential for the valorization of this industrial residue.This research was funded by Bollinghaus Steel, S.A.Multidisciplinary Digital Publishing Institute (MDPI)Universidade do MinhoCastro, FernandoTavares, Pedro B.Cristelo, NunoTeixeira, TiagoGarcia, Joana F.Parreira, Nuno Miguel Germano2022-09-172022-09-17T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/79643engCastro, F.; Tavares, P.B.; Cristelo, N.; Teixeira, T.; Garcia, J.F.; Parreira, N.M.G. Characterization of Stainless Steel Spent Pickling Sludge and Prospects for Its Valorization. Metals 2022, 12, 1539. https:// doi.org/10.3390/met120915392075-470110.3390/met120915391539https://www.mdpi.com/2075-4701/12/9/1539info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:23:53Zoai:repositorium.sdum.uminho.pt:1822/79643Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:17:44.816592Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Characterization of stainless steel spent pickling sludge and prospects for its valorization |
title |
Characterization of stainless steel spent pickling sludge and prospects for its valorization |
spellingShingle |
Characterization of stainless steel spent pickling sludge and prospects for its valorization Castro, Fernando Stainless steel spent pickling sludge Fluorspar Critical raw material Residue Engenharia e Tecnologia::Engenharia dos Materiais Science & Technology Produção e consumo sustentáveis |
title_short |
Characterization of stainless steel spent pickling sludge and prospects for its valorization |
title_full |
Characterization of stainless steel spent pickling sludge and prospects for its valorization |
title_fullStr |
Characterization of stainless steel spent pickling sludge and prospects for its valorization |
title_full_unstemmed |
Characterization of stainless steel spent pickling sludge and prospects for its valorization |
title_sort |
Characterization of stainless steel spent pickling sludge and prospects for its valorization |
author |
Castro, Fernando |
author_facet |
Castro, Fernando Tavares, Pedro B. Cristelo, Nuno Teixeira, Tiago Garcia, Joana F. Parreira, Nuno Miguel Germano |
author_role |
author |
author2 |
Tavares, Pedro B. Cristelo, Nuno Teixeira, Tiago Garcia, Joana F. Parreira, Nuno Miguel Germano |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Castro, Fernando Tavares, Pedro B. Cristelo, Nuno Teixeira, Tiago Garcia, Joana F. Parreira, Nuno Miguel Germano |
dc.subject.por.fl_str_mv |
Stainless steel spent pickling sludge Fluorspar Critical raw material Residue Engenharia e Tecnologia::Engenharia dos Materiais Science & Technology Produção e consumo sustentáveis |
topic |
Stainless steel spent pickling sludge Fluorspar Critical raw material Residue Engenharia e Tecnologia::Engenharia dos Materiais Science & Technology Produção e consumo sustentáveis |
description |
Fluorspar is considered a critical raw material for the European Union, due to its industrial uses and lack of sufficient extraction in European countries. It is a source for hydrofluoric acid manufacture, this latter chemical being employed, among other uses, in the pickling of stainless steels. From this latter activity, sludge is generated due to the need for used water treatment. In this article, we report a full characterization of this residue, obtained in an industrial plant in Vieira de Leiria, Portugal. Its chemical and mineralogical characteristics were determined, showing that it is mostly a mixture of calcium fluoride and calcium sulfate with some heavy metals content. Thermal behavior allowed us to determine that the material melts at around 950 ◦C. The influence of calcining operation on the residue was determined, especially concerned with the leachability of some elements. Taking into account the results of the characterization of this residue, some considerations are presented about the potential for the valorization of this industrial residue. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-09-17 2022-09-17T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://hdl.handle.net/1822/79643 |
url |
https://hdl.handle.net/1822/79643 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Castro, F.; Tavares, P.B.; Cristelo, N.; Teixeira, T.; Garcia, J.F.; Parreira, N.M.G. Characterization of Stainless Steel Spent Pickling Sludge and Prospects for Its Valorization. Metals 2022, 12, 1539. https:// doi.org/10.3390/met12091539 2075-4701 10.3390/met12091539 1539 https://www.mdpi.com/2075-4701/12/9/1539 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Multidisciplinary Digital Publishing Institute (MDPI) |
publisher.none.fl_str_mv |
Multidisciplinary Digital Publishing Institute (MDPI) |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799132630971580416 |