Influence of process parameters, hot metal silicon content and slag properties on steel dephosphorization

During the process of dephosphorization, the main solid phases formed in slag are dicalcium silicate (2CaO.SiO2), tricalcium silicate (3CaO.SiO2) and tricalcium phosphate (3CaO.P2O5). The last one is the main responsible for phosphorous removal. The present paper aims to study the influence of tempe...

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Autores principales:	Raphael Mariano de Souza, Vinícios Andreatta, Inamara Amanda Souza Santos, Eduardo Junca, Felipe Fardin Grillo, José Roberto de Oliveira
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Dephosphorization Steelmaking Computational thermodynamics FactSage Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/7b596693c1e245caa44b23374f5080d9
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id	oai:doaj.org-article:7b596693c1e245caa44b23374f5080d9
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spelling	oai:doaj.org-article:7b596693c1e245caa44b23374f5080d92021-11-18T04:49:12ZInfluence of process parameters, hot metal silicon content and slag properties on steel dephosphorization2238-785410.1016/j.jmrt.2021.10.070https://doaj.org/article/7b596693c1e245caa44b23374f5080d92021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2238785421012072https://doaj.org/toc/2238-7854During the process of dephosphorization, the main solid phases formed in slag are dicalcium silicate (2CaO.SiO2), tricalcium silicate (3CaO.SiO2) and tricalcium phosphate (3CaO.P2O5). The last one is the main responsible for phosphorous removal. The present paper aims to study the influence of temperature, chemical composition, slag properties (viscosity, liquid amount, activities of CaO and FeO) and hot metal silicon (Si) content in the efficiency of steel dephosphorization. Different industrial heats with different slags, hot metal and steel compositions, were selected to be analyzed. The mentioned slag properties and phases were determined by computational thermodynamics using the software FactSage and the results of these analyzes was related to the dephosphorization efficiency from the slags respective heats. Based on these simulations, the parameter Dephosphorization Factor (FDeP = aCaO + aFeO + (Nliquid – Nsolid) ∗ KDeP) was used to measure the slags efficiency in hot metal dephosphorization and several analyzes were made by correlation observation. The results show that CaO activity is the most important parameter on the dephosphorization, whereas hot metal with higher Si content presents less efficiency in dephosphorization, due to the higher SiO2 formation, which increase the amount of solid phases, in addition to decrease in basicity and CaO activity. It was found that FDeP presents a high correlation (R2) with the dephosphorization efficiency and can be used to predict which slag will be the most efficient. The temperature, in the analyzed range, does not seem to be a directly relevant factor in the DeP efficiency.Raphael Mariano de SouzaVinícios AndreattaInamara Amanda Souza SantosEduardo JuncaFelipe Fardin GrilloJosé Roberto de OliveiraElsevierarticleDephosphorizationSteelmakingComputational thermodynamicsFactSageMining engineering. MetallurgyTN1-997ENJournal of Materials Research and Technology, Vol 15, Iss , Pp 5307-5315 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Dephosphorization Steelmaking Computational thermodynamics FactSage Mining engineering. Metallurgy TN1-997
spellingShingle	Dephosphorization Steelmaking Computational thermodynamics FactSage Mining engineering. Metallurgy TN1-997 Raphael Mariano de Souza Vinícios Andreatta Inamara Amanda Souza Santos Eduardo Junca Felipe Fardin Grillo José Roberto de Oliveira Influence of process parameters, hot metal silicon content and slag properties on steel dephosphorization
description	During the process of dephosphorization, the main solid phases formed in slag are dicalcium silicate (2CaO.SiO2), tricalcium silicate (3CaO.SiO2) and tricalcium phosphate (3CaO.P2O5). The last one is the main responsible for phosphorous removal. The present paper aims to study the influence of temperature, chemical composition, slag properties (viscosity, liquid amount, activities of CaO and FeO) and hot metal silicon (Si) content in the efficiency of steel dephosphorization. Different industrial heats with different slags, hot metal and steel compositions, were selected to be analyzed. The mentioned slag properties and phases were determined by computational thermodynamics using the software FactSage and the results of these analyzes was related to the dephosphorization efficiency from the slags respective heats. Based on these simulations, the parameter Dephosphorization Factor (FDeP = aCaO + aFeO + (Nliquid – Nsolid) ∗ KDeP) was used to measure the slags efficiency in hot metal dephosphorization and several analyzes were made by correlation observation. The results show that CaO activity is the most important parameter on the dephosphorization, whereas hot metal with higher Si content presents less efficiency in dephosphorization, due to the higher SiO2 formation, which increase the amount of solid phases, in addition to decrease in basicity and CaO activity. It was found that FDeP presents a high correlation (R2) with the dephosphorization efficiency and can be used to predict which slag will be the most efficient. The temperature, in the analyzed range, does not seem to be a directly relevant factor in the DeP efficiency.
format	article
author	Raphael Mariano de Souza Vinícios Andreatta Inamara Amanda Souza Santos Eduardo Junca Felipe Fardin Grillo José Roberto de Oliveira
author_facet	Raphael Mariano de Souza Vinícios Andreatta Inamara Amanda Souza Santos Eduardo Junca Felipe Fardin Grillo José Roberto de Oliveira
author_sort	Raphael Mariano de Souza
title	Influence of process parameters, hot metal silicon content and slag properties on steel dephosphorization
title_short	Influence of process parameters, hot metal silicon content and slag properties on steel dephosphorization
title_full	Influence of process parameters, hot metal silicon content and slag properties on steel dephosphorization
title_fullStr	Influence of process parameters, hot metal silicon content and slag properties on steel dephosphorization
title_full_unstemmed	Influence of process parameters, hot metal silicon content and slag properties on steel dephosphorization
title_sort	influence of process parameters, hot metal silicon content and slag properties on steel dephosphorization
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/7b596693c1e245caa44b23374f5080d9
work_keys_str_mv	AT raphaelmarianodesouza influenceofprocessparametershotmetalsiliconcontentandslagpropertiesonsteeldephosphorization AT viniciosandreatta influenceofprocessparametershotmetalsiliconcontentandslagpropertiesonsteeldephosphorization AT inamaraamandasouzasantos influenceofprocessparametershotmetalsiliconcontentandslagpropertiesonsteeldephosphorization AT eduardojunca influenceofprocessparametershotmetalsiliconcontentandslagpropertiesonsteeldephosphorization AT felipefardingrillo influenceofprocessparametershotmetalsiliconcontentandslagpropertiesonsteeldephosphorization AT joserobertodeoliveira influenceofprocessparametershotmetalsiliconcontentandslagpropertiesonsteeldephosphorization
_version_	1718425048485724160

Influence of process parameters, hot metal silicon content and slag properties on steel dephosphorization

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