The effect of microsilica and refractory cement content on the properties of andalusite based Low Cement Castables used in aluminum casthouse
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Cerâmica (São Paulo. Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132010000400016 |
Resumo: | The bonding system in low cement castables is achieved by the use of calcium aluminate cement, microsilica and reactive alumina. The lime/silica ratio critically impacts the liquid phase formation at high temperatures and subsequently the corrosion resistance and the mechanical and physical properties of the refractory. In the current study, the effects of microsilica and cement contents on the corrosion resistance and the physical and mechanical properties of Andalusite Low Cement Castables (LCCs) refractories were investigated. Alcoa Cup test was used to evaluate the corrosion resistance of the castables at 850 ºC and 1160 ºC. The study showed that an increase in the microsilica/cement ratio improves the physical and mechanical properties of the castable, but at the expense of the corrosion resistance. When a fixed amount of BaSO4 was added to the base refractory material, barium celsian along with glassy phase formation was observed to increase with the increase in the microsilica/cement ratio in the refractory. The presence of the glassy phases was noted to lower the positive effect of Ba-celsian formation on improving the corrosion resistance of the refractory. The observed results were validated using thermodynamic calculations which indicated that Ba-celsian phase was more resistant than Ca-anorthite for applications involving contact with molten aluminum. |
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The effect of microsilica and refractory cement content on the properties of andalusite based Low Cement Castables used in aluminum casthousecastablesrefractorieslow cement castablesThe bonding system in low cement castables is achieved by the use of calcium aluminate cement, microsilica and reactive alumina. The lime/silica ratio critically impacts the liquid phase formation at high temperatures and subsequently the corrosion resistance and the mechanical and physical properties of the refractory. In the current study, the effects of microsilica and cement contents on the corrosion resistance and the physical and mechanical properties of Andalusite Low Cement Castables (LCCs) refractories were investigated. Alcoa Cup test was used to evaluate the corrosion resistance of the castables at 850 ºC and 1160 ºC. The study showed that an increase in the microsilica/cement ratio improves the physical and mechanical properties of the castable, but at the expense of the corrosion resistance. When a fixed amount of BaSO4 was added to the base refractory material, barium celsian along with glassy phase formation was observed to increase with the increase in the microsilica/cement ratio in the refractory. The presence of the glassy phases was noted to lower the positive effect of Ba-celsian formation on improving the corrosion resistance of the refractory. The observed results were validated using thermodynamic calculations which indicated that Ba-celsian phase was more resistant than Ca-anorthite for applications involving contact with molten aluminum.Associação Brasileira de Cerâmica2010-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132010000400016Cerâmica v.56 n.340 2010reponame:Cerâmica (São Paulo. Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S0366-69132010000400016info:eu-repo/semantics/openAccessFiroozjaei,E. A.Saidi,A.Monshi,A.Koshy,P.eng2011-02-07T00:00:00Zoai:scielo:S0366-69132010000400016Revistahttps://www.scielo.br/j/ce/PUBhttps://old.scielo.br/oai/scielo-oai.phpceram.abc@gmail.com||ceram.abc@gmail.com1678-45530366-6913opendoar:2011-02-07T00:00Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
The effect of microsilica and refractory cement content on the properties of andalusite based Low Cement Castables used in aluminum casthouse |
title |
The effect of microsilica and refractory cement content on the properties of andalusite based Low Cement Castables used in aluminum casthouse |
spellingShingle |
The effect of microsilica and refractory cement content on the properties of andalusite based Low Cement Castables used in aluminum casthouse Firoozjaei,E. A. castables refractories low cement castables |
title_short |
The effect of microsilica and refractory cement content on the properties of andalusite based Low Cement Castables used in aluminum casthouse |
title_full |
The effect of microsilica and refractory cement content on the properties of andalusite based Low Cement Castables used in aluminum casthouse |
title_fullStr |
The effect of microsilica and refractory cement content on the properties of andalusite based Low Cement Castables used in aluminum casthouse |
title_full_unstemmed |
The effect of microsilica and refractory cement content on the properties of andalusite based Low Cement Castables used in aluminum casthouse |
title_sort |
The effect of microsilica and refractory cement content on the properties of andalusite based Low Cement Castables used in aluminum casthouse |
author |
Firoozjaei,E. A. |
author_facet |
Firoozjaei,E. A. Saidi,A. Monshi,A. Koshy,P. |
author_role |
author |
author2 |
Saidi,A. Monshi,A. Koshy,P. |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Firoozjaei,E. A. Saidi,A. Monshi,A. Koshy,P. |
dc.subject.por.fl_str_mv |
castables refractories low cement castables |
topic |
castables refractories low cement castables |
description |
The bonding system in low cement castables is achieved by the use of calcium aluminate cement, microsilica and reactive alumina. The lime/silica ratio critically impacts the liquid phase formation at high temperatures and subsequently the corrosion resistance and the mechanical and physical properties of the refractory. In the current study, the effects of microsilica and cement contents on the corrosion resistance and the physical and mechanical properties of Andalusite Low Cement Castables (LCCs) refractories were investigated. Alcoa Cup test was used to evaluate the corrosion resistance of the castables at 850 ºC and 1160 ºC. The study showed that an increase in the microsilica/cement ratio improves the physical and mechanical properties of the castable, but at the expense of the corrosion resistance. When a fixed amount of BaSO4 was added to the base refractory material, barium celsian along with glassy phase formation was observed to increase with the increase in the microsilica/cement ratio in the refractory. The presence of the glassy phases was noted to lower the positive effect of Ba-celsian formation on improving the corrosion resistance of the refractory. The observed results were validated using thermodynamic calculations which indicated that Ba-celsian phase was more resistant than Ca-anorthite for applications involving contact with molten aluminum. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-12-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132010000400016 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132010000400016 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0366-69132010000400016 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Associação Brasileira de Cerâmica |
publisher.none.fl_str_mv |
Associação Brasileira de Cerâmica |
dc.source.none.fl_str_mv |
Cerâmica v.56 n.340 2010 reponame:Cerâmica (São Paulo. Online) instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Cerâmica (São Paulo. Online) |
collection |
Cerâmica (São Paulo. Online) |
repository.name.fl_str_mv |
Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
ceram.abc@gmail.com||ceram.abc@gmail.com |
_version_ |
1748936781800144896 |