Analysis of secondary refining slag parameters with focus on inclusion cleanliness
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/185203 |
Resumo: | Secondary refining slag samples with different chemical compositions (45-54 % CaO, 7-13 % Al2O3, 20-29 % SiO2, 9-16 % MgO, 0-5 % CaF2) were investigated to verify the influence of their effective viscosity on inclusion cleanliness of DIN 38MnS6 in a steelmaking plant. The steel samples were collected during the production process for analysis of inclusions. Using the commercial software FactSage 6.4, thermodynamic calculations were performed to determine the effective viscosity, solid fraction, liquid fraction and MgO saturation point of these slags at 1560ºC. The results showed that all the slags were saturated in MgO, revealing a better protection of the ladle refractory. The addition of 2 to 5 % of CaF2 reduced the effective viscosity values for the analyzed slags from 0.45 Pa∙s to 0.10 Pa∙s , in comparison to the slags without the addition of CaF2, with an effective viscosity of 0.40 Pa∙s, 0.27 Pa∙s and 0.22 Pa∙s, decreasing the level of non-metallic inclusions for some of the analysed heats. However, it was detected during the manufacturing process that high slag fluidity and re-oxidation events continue to be a challenge associated with reducing the level of non-metallic inclusions. |
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Pereira, Julio Anibal MoralesRocha, Vinicius Cardoso daYoshioka, AyumiBielefeldt, Wagner VianaVilela, Antonio Cezar Faria2018-11-28T02:45:54Z20181516-1439http://hdl.handle.net/10183/185203001081555Secondary refining slag samples with different chemical compositions (45-54 % CaO, 7-13 % Al2O3, 20-29 % SiO2, 9-16 % MgO, 0-5 % CaF2) were investigated to verify the influence of their effective viscosity on inclusion cleanliness of DIN 38MnS6 in a steelmaking plant. The steel samples were collected during the production process for analysis of inclusions. Using the commercial software FactSage 6.4, thermodynamic calculations were performed to determine the effective viscosity, solid fraction, liquid fraction and MgO saturation point of these slags at 1560ºC. The results showed that all the slags were saturated in MgO, revealing a better protection of the ladle refractory. The addition of 2 to 5 % of CaF2 reduced the effective viscosity values for the analyzed slags from 0.45 Pa∙s to 0.10 Pa∙s , in comparison to the slags without the addition of CaF2, with an effective viscosity of 0.40 Pa∙s, 0.27 Pa∙s and 0.22 Pa∙s, decreasing the level of non-metallic inclusions for some of the analysed heats. However, it was detected during the manufacturing process that high slag fluidity and re-oxidation events continue to be a challenge associated with reducing the level of non-metallic inclusions.application/pdfengMaterials research : ibero-american journal of materials. São Carlos, SP. Vol. 21, no. 5 (2018), e20180296, p. 1-11EscóriaViscosidadeAçoInclusão não metálicaRefining slagsViscosityInclusionsClean steelsSecondary metallurgyAnalysis of secondary refining slag parameters with focus on inclusion cleanlinessinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001081555.pdf.txt001081555.pdf.txtExtracted Texttext/plain49187http://www.lume.ufrgs.br/bitstream/10183/185203/2/001081555.pdf.txtabf92aaa1f744adf7a48e6d404593f48MD52ORIGINAL001081555.pdfTexto completo (inglês)application/pdf1459002http://www.lume.ufrgs.br/bitstream/10183/185203/1/001081555.pdfa0ce15e116acab4bcf2342fa3aeec641MD5110183/1852032024-10-17 06:55:22.347557oai:www.lume.ufrgs.br:10183/185203Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-10-17T09:55:22Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Analysis of secondary refining slag parameters with focus on inclusion cleanliness |
title |
Analysis of secondary refining slag parameters with focus on inclusion cleanliness |
spellingShingle |
Analysis of secondary refining slag parameters with focus on inclusion cleanliness Pereira, Julio Anibal Morales Escória Viscosidade Aço Inclusão não metálica Refining slags Viscosity Inclusions Clean steels Secondary metallurgy |
title_short |
Analysis of secondary refining slag parameters with focus on inclusion cleanliness |
title_full |
Analysis of secondary refining slag parameters with focus on inclusion cleanliness |
title_fullStr |
Analysis of secondary refining slag parameters with focus on inclusion cleanliness |
title_full_unstemmed |
Analysis of secondary refining slag parameters with focus on inclusion cleanliness |
title_sort |
Analysis of secondary refining slag parameters with focus on inclusion cleanliness |
author |
Pereira, Julio Anibal Morales |
author_facet |
Pereira, Julio Anibal Morales Rocha, Vinicius Cardoso da Yoshioka, Ayumi Bielefeldt, Wagner Viana Vilela, Antonio Cezar Faria |
author_role |
author |
author2 |
Rocha, Vinicius Cardoso da Yoshioka, Ayumi Bielefeldt, Wagner Viana Vilela, Antonio Cezar Faria |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Pereira, Julio Anibal Morales Rocha, Vinicius Cardoso da Yoshioka, Ayumi Bielefeldt, Wagner Viana Vilela, Antonio Cezar Faria |
dc.subject.por.fl_str_mv |
Escória Viscosidade Aço Inclusão não metálica |
topic |
Escória Viscosidade Aço Inclusão não metálica Refining slags Viscosity Inclusions Clean steels Secondary metallurgy |
dc.subject.eng.fl_str_mv |
Refining slags Viscosity Inclusions Clean steels Secondary metallurgy |
description |
Secondary refining slag samples with different chemical compositions (45-54 % CaO, 7-13 % Al2O3, 20-29 % SiO2, 9-16 % MgO, 0-5 % CaF2) were investigated to verify the influence of their effective viscosity on inclusion cleanliness of DIN 38MnS6 in a steelmaking plant. The steel samples were collected during the production process for analysis of inclusions. Using the commercial software FactSage 6.4, thermodynamic calculations were performed to determine the effective viscosity, solid fraction, liquid fraction and MgO saturation point of these slags at 1560ºC. The results showed that all the slags were saturated in MgO, revealing a better protection of the ladle refractory. The addition of 2 to 5 % of CaF2 reduced the effective viscosity values for the analyzed slags from 0.45 Pa∙s to 0.10 Pa∙s , in comparison to the slags without the addition of CaF2, with an effective viscosity of 0.40 Pa∙s, 0.27 Pa∙s and 0.22 Pa∙s, decreasing the level of non-metallic inclusions for some of the analysed heats. However, it was detected during the manufacturing process that high slag fluidity and re-oxidation events continue to be a challenge associated with reducing the level of non-metallic inclusions. |
publishDate |
2018 |
dc.date.accessioned.fl_str_mv |
2018-11-28T02:45:54Z |
dc.date.issued.fl_str_mv |
2018 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/other |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
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publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/185203 |
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1516-1439 |
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001081555 |
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url |
http://hdl.handle.net/10183/185203 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Materials research : ibero-american journal of materials. São Carlos, SP. Vol. 21, no. 5 (2018), e20180296, p. 1-11 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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