Effect of TiO2 content in slag on Ti content in molten steel

A calculation model of activity for CaO–SiO2–MgO–Al2O3–TiO2 slag is established according to molecular-ion coexistence theory of slag structure to calculate the activities of Al2O3, SiO2, and TiO2 in the slag. The possibility of TiO2 reduction in the slag during refining is analyzed by thermodynamic...

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Autores principales:	Gao Gang, Shi Xiaofang, Zhu Zhenghai, Chang Lizhong
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	clean steel ti tio2 slag coexistence theory Technology T Chemical technology TP1-1185 Chemicals: Manufacture, use, etc. TP200-248
Acceso en línea:	https://doaj.org/article/c7aa5fc51a4041ff9fbb761ab19dd6b5
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spelling	oai:doaj.org-article:c7aa5fc51a4041ff9fbb761ab19dd6b52021-12-05T14:10:50ZEffect of TiO2 content in slag on Ti content in molten steel2191-032410.1515/htmp-2021-0015https://doaj.org/article/c7aa5fc51a4041ff9fbb761ab19dd6b52021-04-01T00:00:00Zhttps://doi.org/10.1515/htmp-2021-0015https://doaj.org/toc/2191-0324A calculation model of activity for CaO–SiO2–MgO–Al2O3–TiO2 slag is established according to molecular-ion coexistence theory of slag structure to calculate the activities of Al2O3, SiO2, and TiO2 in the slag. The possibility of TiO2 reduction in the slag during refining is analyzed by thermodynamics and verified by laboratory and industrial experiments. Both theoretical analysis and laboratory experimental results show that the content of TiO2 in the ladle slag significantly influences the Ti content in molten steel. When the content of the dissolved aluminum in molten steel is 0.030–0.050%, the TiO2 content in the ladle slag should be controlled below 0.3% to prevent TiO2 reduction. The critical content of TiO2 decreases with an increasing amount of the dissolved aluminum in molten steel. In addition, silicon should be used as a deoxidizer during diffused deoxidization because aluminum as a deoxidizer would lead to the reduction of TiO2. The industrial experiments confirm the results of the laboratory experiments and thermodynamics analysis.Gao GangShi XiaofangZhu ZhenghaiChang LizhongDe Gruyterarticleclean steeltitio2 slagcoexistence theoryTechnologyTChemical technologyTP1-1185Chemicals: Manufacture, use, etc.TP200-248ENHigh Temperature Materials and Processes, Vol 40, Iss 1, Pp 99-107 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	clean steel ti tio2 slag coexistence theory Technology T Chemical technology TP1-1185 Chemicals: Manufacture, use, etc. TP200-248
spellingShingle	clean steel ti tio2 slag coexistence theory Technology T Chemical technology TP1-1185 Chemicals: Manufacture, use, etc. TP200-248 Gao Gang Shi Xiaofang Zhu Zhenghai Chang Lizhong Effect of TiO2 content in slag on Ti content in molten steel
description	A calculation model of activity for CaO–SiO2–MgO–Al2O3–TiO2 slag is established according to molecular-ion coexistence theory of slag structure to calculate the activities of Al2O3, SiO2, and TiO2 in the slag. The possibility of TiO2 reduction in the slag during refining is analyzed by thermodynamics and verified by laboratory and industrial experiments. Both theoretical analysis and laboratory experimental results show that the content of TiO2 in the ladle slag significantly influences the Ti content in molten steel. When the content of the dissolved aluminum in molten steel is 0.030–0.050%, the TiO2 content in the ladle slag should be controlled below 0.3% to prevent TiO2 reduction. The critical content of TiO2 decreases with an increasing amount of the dissolved aluminum in molten steel. In addition, silicon should be used as a deoxidizer during diffused deoxidization because aluminum as a deoxidizer would lead to the reduction of TiO2. The industrial experiments confirm the results of the laboratory experiments and thermodynamics analysis.
format	article
author	Gao Gang Shi Xiaofang Zhu Zhenghai Chang Lizhong
author_facet	Gao Gang Shi Xiaofang Zhu Zhenghai Chang Lizhong
author_sort	Gao Gang
title	Effect of TiO2 content in slag on Ti content in molten steel
title_short	Effect of TiO2 content in slag on Ti content in molten steel
title_full	Effect of TiO2 content in slag on Ti content in molten steel
title_fullStr	Effect of TiO2 content in slag on Ti content in molten steel
title_full_unstemmed	Effect of TiO2 content in slag on Ti content in molten steel
title_sort	effect of tio2 content in slag on ti content in molten steel
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/c7aa5fc51a4041ff9fbb761ab19dd6b5
work_keys_str_mv	AT gaogang effectoftio2contentinslagonticontentinmoltensteel AT shixiaofang effectoftio2contentinslagonticontentinmoltensteel AT zhuzhenghai effectoftio2contentinslagonticontentinmoltensteel AT changlizhong effectoftio2contentinslagonticontentinmoltensteel
_version_	1718371688962326528

Effect of TiO2 content in slag on Ti content in molten steel

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