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Modification of Inclusions in Molten Steel by Mg-Ca Transfer from Top Slag: Experimental Confirmation of the 'Refractory-Slag-Metal-Inclusion (ReSMI)' Multiphase Reaction Model
- Authors
- Shin, Jae Hong; Park, Joo Hyun
- Issue Date
- Dec-2017
- Publisher
- ASM International
- Keywords
- STAINLESS-STEEL; NONMETALLIC INCLUSIONS; FORMATION MECHANISM; CALCIUM TREATMENT; MGAL2O4 SPINEL; ALUMINUM; MELTS; EVOLUTION; SULFUR
- Citation
- Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, v.48, no.6, pp.2820 - 2825
- Indexed
- SCIE
SCOPUS
- Journal Title
- Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
- Volume
- 48
- Number
- 6
- Start Page
- 2820
- End Page
- 2825
- ISSN
- 1073-5615
- Abstract
- High-temperature experiments and Refractory-Slag-Metal-Inclusion (ReSMI) multiphase reaction simulations were carried out to determine the effect of the ladle slag composition on the formation behavior of non-metallic inclusions in molten steel. Immediately after the slag-metal reaction, magnesium migrated to the molten steel and a MgAl2O4 spinel inclusion was formed due to a reaction between magnesium and alumina inclusions. However, the spinel inclusion changed entirely into a liquid oxide inclusion via the transfer of calcium from slag to metal in the final stage of the reaction. Calcium transfer from slag to metal was more enhanced for lower SiO2 content in the slag. Consequently, the spinel inclusion was modified to form a liquid CaO-Al2O3-MgO-SiO2 inclusion, which is harmless under steelmaking conditions. The modification reaction was more efficient as the SiO2 content in the slag decreases.
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Related Researcher
- Park, Joo Hyun
- ERICA 공학대학 (DEPARTMENT OF MATERIALS SCIENCE AND CHEMICAL ENGINEERING)