Evolution of physicochemical properties of quick lime at converter-smelting temperature

The volume stability caused by the hydration of f-CaO is one of the main obstacles to the comprehensive utilization of steel-making slag. In view of the f-CaO produced by incomplete dissolution of lime, it is necessary to strengthen the dissolution behavior of lime in the converter process. The reac...

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Autores principales:	Zhang Mengxu, Li Jianli, Xue Zhengliang, Zhu Renlin, Mou Qiqiang, Zhu Hangyu
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	quick lime reactivity cao crystal porosity f-cao Technology T Chemical technology TP1-1185 Chemicals: Manufacture, use, etc. TP200-248
Acceso en línea:	https://doaj.org/article/4ad94194b658436c82a4b38375293bfc
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spelling	oai:doaj.org-article:4ad94194b658436c82a4b38375293bfc2021-12-05T14:10:50ZEvolution of physicochemical properties of quick lime at converter-smelting temperature2191-032410.1515/htmp-2021-0008https://doaj.org/article/4ad94194b658436c82a4b38375293bfc2021-03-01T00:00:00Zhttps://doi.org/10.1515/htmp-2021-0008https://doaj.org/toc/2191-0324The volume stability caused by the hydration of f-CaO is one of the main obstacles to the comprehensive utilization of steel-making slag. In view of the f-CaO produced by incomplete dissolution of lime, it is necessary to strengthen the dissolution behavior of lime in the converter process. The reactivity of lime determines the dissolution efficiency and is closely related to its microstructure. The experimental results show that the reactivity and porosity of quick lime decrease and the average diameter of pore increases with an increase in temperature. The CaO crystals gradually grow up under the action of grain boundary migration. When the temperature increased from 1,350 to 1,600°C, the lime reactivity decreased from 237.60 to 40.60 mL, the porosity decreased from 30.55 to 15.91%, the average pore diameter increased from 159.10 to 1471.80 nm, and the average CaO particle size increased from 0.33 to 9.61 µm. The results indicate that reactivity is decreased because of the deformation and growth of CaO crystals and the decrease in porosity in reactive lime. This will cause an obstacle to the dissolution of lime and is not conducive to the control of f-CaO in slag.Zhang MengxuLi JianliXue ZhengliangZhu RenlinMou QiqiangZhu HangyuDe Gruyterarticlequick limereactivitycao crystalporosityf-caoTechnologyTChemical technologyTP1-1185Chemicals: Manufacture, use, etc.TP200-248ENHigh Temperature Materials and Processes, Vol 40, Iss 1, Pp 32-39 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	quick lime reactivity cao crystal porosity f-cao Technology T Chemical technology TP1-1185 Chemicals: Manufacture, use, etc. TP200-248
spellingShingle	quick lime reactivity cao crystal porosity f-cao Technology T Chemical technology TP1-1185 Chemicals: Manufacture, use, etc. TP200-248 Zhang Mengxu Li Jianli Xue Zhengliang Zhu Renlin Mou Qiqiang Zhu Hangyu Evolution of physicochemical properties of quick lime at converter-smelting temperature
description	The volume stability caused by the hydration of f-CaO is one of the main obstacles to the comprehensive utilization of steel-making slag. In view of the f-CaO produced by incomplete dissolution of lime, it is necessary to strengthen the dissolution behavior of lime in the converter process. The reactivity of lime determines the dissolution efficiency and is closely related to its microstructure. The experimental results show that the reactivity and porosity of quick lime decrease and the average diameter of pore increases with an increase in temperature. The CaO crystals gradually grow up under the action of grain boundary migration. When the temperature increased from 1,350 to 1,600°C, the lime reactivity decreased from 237.60 to 40.60 mL, the porosity decreased from 30.55 to 15.91%, the average pore diameter increased from 159.10 to 1471.80 nm, and the average CaO particle size increased from 0.33 to 9.61 µm. The results indicate that reactivity is decreased because of the deformation and growth of CaO crystals and the decrease in porosity in reactive lime. This will cause an obstacle to the dissolution of lime and is not conducive to the control of f-CaO in slag.
format	article
author	Zhang Mengxu Li Jianli Xue Zhengliang Zhu Renlin Mou Qiqiang Zhu Hangyu
author_facet	Zhang Mengxu Li Jianli Xue Zhengliang Zhu Renlin Mou Qiqiang Zhu Hangyu
author_sort	Zhang Mengxu
title	Evolution of physicochemical properties of quick lime at converter-smelting temperature
title_short	Evolution of physicochemical properties of quick lime at converter-smelting temperature
title_full	Evolution of physicochemical properties of quick lime at converter-smelting temperature
title_fullStr	Evolution of physicochemical properties of quick lime at converter-smelting temperature
title_full_unstemmed	Evolution of physicochemical properties of quick lime at converter-smelting temperature
title_sort	evolution of physicochemical properties of quick lime at converter-smelting temperature
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/4ad94194b658436c82a4b38375293bfc
work_keys_str_mv	AT zhangmengxu evolutionofphysicochemicalpropertiesofquicklimeatconvertersmeltingtemperature AT lijianli evolutionofphysicochemicalpropertiesofquicklimeatconvertersmeltingtemperature AT xuezhengliang evolutionofphysicochemicalpropertiesofquicklimeatconvertersmeltingtemperature AT zhurenlin evolutionofphysicochemicalpropertiesofquicklimeatconvertersmeltingtemperature AT mouqiqiang evolutionofphysicochemicalpropertiesofquicklimeatconvertersmeltingtemperature AT zhuhangyu evolutionofphysicochemicalpropertiesofquicklimeatconvertersmeltingtemperature
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Evolution of physicochemical properties of quick lime at converter-smelting temperature

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