Collision-coalescence among inclusions with bubble attachment and transport in molten steel of RH

Inclusions can lead to various defects in the final steel products, and RH vacuum refining is an effective and vital technology to remove inclusions from molten steel. By the computational fluid dynamics (CFD) method, the inclusion mass/population conservation model is developed to have a deep insig...

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Autores principales:	Shifu Chen, Hong Lei, Hanchuang Hou, Changyou Ding, Han Zhang, Yan Zhao
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	CFD RH Inclusion-bubble Slip velocity Collision-coalescence Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/61801074e60c4272bf0118fce215fa96
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spelling	oai:doaj.org-article:61801074e60c4272bf0118fce215fa962021-11-12T04:35:49ZCollision-coalescence among inclusions with bubble attachment and transport in molten steel of RH2238-785410.1016/j.jmrt.2021.10.118https://doaj.org/article/61801074e60c4272bf0118fce215fa962021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2238785421012540https://doaj.org/toc/2238-7854Inclusions can lead to various defects in the final steel products, and RH vacuum refining is an effective and vital technology to remove inclusions from molten steel. By the computational fluid dynamics (CFD) method, the inclusion mass/population conservation model is developed to have a deep insight into the inclusion transfer behavior in the argon molten steel flow of RH. Particularly, the argon slip velocity is introduced into the inclusion convection velocity in the mathematical model, and the inclusions attached by argon bubbles can return to the molten steel when bubbles escape from the free surface of the vacuum chamber. The numerical results of the fluid flow and the inclusion transfer behavior are validated by the measured data in the actual experiment. The argon bubbles significantly enhance the inclusion transport and collision-coalescence process. Besides, the variations of the inclusion volume concentration and the inclusion number density in the up snorkel are about 2 times those in the down snorkel. The number of inclusions with diameters less than 10 μm decreases with the vacuum treatment time, while the number of inclusions with diameters greater than 10 μm increases first and then decreases gradually. Near the free surface of the ladle, there are the greatest inclusion volume concentration, the greatest inclusion number density and the lowest inclusion characteristic radius.Shifu ChenHong LeiHanchuang HouChangyou DingHan ZhangYan ZhaoElsevierarticleCFDRHInclusion-bubbleSlip velocityCollision-coalescenceMining engineering. MetallurgyTN1-997ENJournal of Materials Research and Technology, Vol 15, Iss , Pp 5141-5150 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	CFD RH Inclusion-bubble Slip velocity Collision-coalescence Mining engineering. Metallurgy TN1-997
spellingShingle	CFD RH Inclusion-bubble Slip velocity Collision-coalescence Mining engineering. Metallurgy TN1-997 Shifu Chen Hong Lei Hanchuang Hou Changyou Ding Han Zhang Yan Zhao Collision-coalescence among inclusions with bubble attachment and transport in molten steel of RH
description	Inclusions can lead to various defects in the final steel products, and RH vacuum refining is an effective and vital technology to remove inclusions from molten steel. By the computational fluid dynamics (CFD) method, the inclusion mass/population conservation model is developed to have a deep insight into the inclusion transfer behavior in the argon molten steel flow of RH. Particularly, the argon slip velocity is introduced into the inclusion convection velocity in the mathematical model, and the inclusions attached by argon bubbles can return to the molten steel when bubbles escape from the free surface of the vacuum chamber. The numerical results of the fluid flow and the inclusion transfer behavior are validated by the measured data in the actual experiment. The argon bubbles significantly enhance the inclusion transport and collision-coalescence process. Besides, the variations of the inclusion volume concentration and the inclusion number density in the up snorkel are about 2 times those in the down snorkel. The number of inclusions with diameters less than 10 μm decreases with the vacuum treatment time, while the number of inclusions with diameters greater than 10 μm increases first and then decreases gradually. Near the free surface of the ladle, there are the greatest inclusion volume concentration, the greatest inclusion number density and the lowest inclusion characteristic radius.
format	article
author	Shifu Chen Hong Lei Hanchuang Hou Changyou Ding Han Zhang Yan Zhao
author_facet	Shifu Chen Hong Lei Hanchuang Hou Changyou Ding Han Zhang Yan Zhao
author_sort	Shifu Chen
title	Collision-coalescence among inclusions with bubble attachment and transport in molten steel of RH
title_short	Collision-coalescence among inclusions with bubble attachment and transport in molten steel of RH
title_full	Collision-coalescence among inclusions with bubble attachment and transport in molten steel of RH
title_fullStr	Collision-coalescence among inclusions with bubble attachment and transport in molten steel of RH
title_full_unstemmed	Collision-coalescence among inclusions with bubble attachment and transport in molten steel of RH
title_sort	collision-coalescence among inclusions with bubble attachment and transport in molten steel of rh
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/61801074e60c4272bf0118fce215fa96
work_keys_str_mv	AT shifuchen collisioncoalescenceamonginclusionswithbubbleattachmentandtransportinmoltensteelofrh AT honglei collisioncoalescenceamonginclusionswithbubbleattachmentandtransportinmoltensteelofrh AT hanchuanghou collisioncoalescenceamonginclusionswithbubbleattachmentandtransportinmoltensteelofrh AT changyouding collisioncoalescenceamonginclusionswithbubbleattachmentandtransportinmoltensteelofrh AT hanzhang collisioncoalescenceamonginclusionswithbubbleattachmentandtransportinmoltensteelofrh AT yanzhao collisioncoalescenceamonginclusionswithbubbleattachmentandtransportinmoltensteelofrh
_version_	1718431233326710784

Collision-coalescence among inclusions with bubble attachment and transport in molten steel of RH

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