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Effect of Refining Slag Composition on Inclusions in Molten Steel treated by Barium‐bearing Alloy
Author(s) -
Li Yang,
Jiang ZhouHua,
Liu Yang
Publication year - 2006
Publication title -
developments in chemical engineering and mineral processing
Language(s) - English
Resource type - Journals
eISSN - 1932-2143
pISSN - 0969-1855
DOI - 10.1002/apj.5500140311
Subject(s) - refining (metallurgy) , deoxidization , slag (welding) , metallurgy , crucible (geodemography) , materials science , alloy , composition (language) , steelmaking , barium , liquid steel , chemical composition , inclusion (mineral) , chemistry , mineralogy , linguistics , computational chemistry , philosophy , organic chemistry
The effect of the refining slag composition on the inclusions in molten steel was studied in MgO crucible by using MoSi 2 furnace. The experimental steel was heavy rail steel and Si‐Ca‐Ba alloy was used as the deoxidizer. The results showed that the total oxygen content of steel, and the total quantities, total areas and average radius of inclusions decreased with the increased basicity of refining slag. The total quantities and total areas of inclusions were the least when Al 2 O 3 content in refining slag was between 13% and 20%, while the proportion of small inclusions increased when Al 2 O 3 content was higher than 20%. The contents of SiO 2 and Al 2 O 3 in inclusions were affected directly by the SiO 2 and Al 2 O 3 contents in refining slag, and it was very remarkble when the slag composition was CaOAl 2 O 3 2SiO 2 . Therefore, it's feasible to control the composition of inclusions by controlling the composition of refining slag.