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Dissolution behavior of different inclusions in high Al steel reacted with refining slags
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Zhao, Shuo, Li, Zushu, Xu, Renze, Khasraw, Darbaz, Song, Gaoyang and Xu, Dong (2021) Dissolution behavior of different inclusions in high Al steel reacted with refining slags. Metals, 11 (11). 1801. doi:10.3390/met11111801 ISSN 2075-4701.
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Official URL: https://doi.org/10.3390/met11111801
Abstract
Al2O3, Al2O3·TiN, Al2O3·MgO and CaO·2Al2O3 are four different types of inclusions in high Al steels. To improve the steel cleanness level, an effective removal of such inclusions during secondary refin-ing is very important, so these inclusions should be removed effectively via inclusion dissolution in the slag. The dissolution behavior of Al2O3, Al2O3·TiN, Al2O3·MgO and CaO·2Al2O3 in CaO-SiO2-Al2O3-MgO slags as well as the steel-slag reaction was investigated using laser scanning confocal mi-croscopy (LSCM) and high-temperature furnace experiments, and thermodynamic calculations for in-clusions in steel were carried out by FactSage. The results showed that Al2O3·TiN was observed to be completely different from the other oxides. The composite oxides dissolved quickly in slags, and the dissolution time of inclusions increased as their melting point increased. SiO2 and B2O3 in the slag were almost completely reacted with [Al] in steel, so the slags without SiO2 content showed a positive effect on avoiding formation of Al2O3 system inclusions and promoting inclusions dissolution as com-pared to SiO2-rich slags. The steel-slag reaction was also found to influence the inclusion types in steel significantly. Due to the rapid absorption of different inclusions in the slag, it was found that the dissolution time of inclusions mainly depends on the diffusion in the molten slag.
Item Type: | Journal Article | ||||||||||||||||||||||||
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Subjects: | Q Science > QH Natural history T Technology > TA Engineering (General). Civil engineering (General) T Technology > TN Mining engineering. Metallurgy |
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Confocal microscopy, Steel, High strength , Slag, Iron slag, Iron slag -- Dissolution | ||||||||||||||||||||||||
Journal or Publication Title: | Metals | ||||||||||||||||||||||||
Publisher: | MDPI | ||||||||||||||||||||||||
ISSN: | 2075-4701 | ||||||||||||||||||||||||
Official Date: | 9 November 2021 | ||||||||||||||||||||||||
Dates: |
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Volume: | 11 | ||||||||||||||||||||||||
Number: | 11 | ||||||||||||||||||||||||
Article Number: | 1801 | ||||||||||||||||||||||||
DOI: | 10.3390/met11111801 | ||||||||||||||||||||||||
Status: | Peer Reviewed | ||||||||||||||||||||||||
Publication Status: | Published | ||||||||||||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||||||||||||||
Date of first compliant deposit: | 6 December 2021 | ||||||||||||||||||||||||
Date of first compliant Open Access: | 6 December 2021 | ||||||||||||||||||||||||
RIOXX Funder/Project Grant: |
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