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The mass ratios of the total calcium to aluminium contents, Ca/Al, in liquid steel in equilibrium state with calcium aluminosilicates C12A7-SiO2 and C3Al-SiO2 inclusions, i.e. 12CaO·7AI203 and 3CaO·Al2O3 inclusions containing some silica dissolved, were calculated. The Ca/Al value used to be a technologic criterion of alumina inclusions transformation into calcium aluminate CI2A7 accomplished by calcium...
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