Mass-Transfer Model for Steel, Slag, and Inclusions during Ladle-Furnace Refining

Precise control of inclusion and molten steel compositions during ladle-furnace refining is important to obtain high-quality steel. Mass-transfer behavior affects these compositions. A model was developed to investigate the mass transfer occurring between molten steel, slag, inclusions, and the refr...

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Bibliographic Details
Published in:High temperature materials and processes 2018-07, Vol.37 (7), p.665-674
Main Authors: Zhu, Liguang, Jia, Yanan, Liu, Zengxun, Zhang, Caijun, Wang, Xingjuan, Xiao, Pengcheng
Format: Article
Language:English
Subjects:
Aluminum oxide
Calcium
Composition
coupled reaction
Erosion rates
Inclusions
kinetics
Ladle metallurgy
ladle refining
Ladles
Magnesium
Manganese
Mass transfer
Mathematical models
oxygen activity
Silicon dioxide
Silicon steels
slag
steel
Steel industry
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Summary:Precise control of inclusion and molten steel compositions during ladle-furnace refining is important to obtain high-quality steel. Mass-transfer behavior affects these compositions. A model was developed to investigate the mass transfer occurring between molten steel, slag, inclusions, and the refractory during ladle-furnace refining, using two-film theory to describe the reactions. A coupled-reaction model based on the CaO–Al –MgO–SiO –FeO–P slag and Mn–Si–Al–Ca–Mg–P–S–O steel systems was applied to describe the reactions between molten steel and slag; the reactions between the refractory lining and slag or steel were described using average industrial erosion rate data. The model was used to calculate changes in the compositions of molten steel and slag, oxygen activity at the slag–molten steel interface, and composition of the inclusions. The calculated results agreed with operational results for a 100 t ladle furnace at the Tangsteel plant in China.
ISSN:0334-6455
2191-0324
DOI:10.1515/htmp-2017-0011