Thermodynamic Modeling for Controls of Deoxidation and Oxide Inclusions in Molten Steel
钢液脱氧和氧化物夹杂控制的热力学模型

Component activities in CaO-MgO-Al_2O_3-SiO_2 and CaO-MnO-Al_2O_3-SiO_2 systems were calculated by a sub-regular solution model of a multi-component system. A thermodynamic modeling for controls of deoxidation and oxide inclusion in molten steel was developed based on these calculations, which was used for thermodynamic calculations for deoxidation, slag-melt equilibration and oxide-melt equilibration in order to control the deoxidation and compositions of oxide inclusion of steel. The results of model applications are validated with the industrial database such as the silicon deoxidation through slag-melt equilibration in LF, the calcium treatment of Al-Si killed steel and the composition of oxide inclusion formed during solidification in caster. The presented modeling can be used in deoxidation control and oxide inclusion control in steel.