Influence Of Phase Distribution Of Converter Slag Microzones On The Occurrence Of P

The phase and element distribution of converter slag was analyzed with the backscattered electron (BSE) images of scanning electron microscopy and X-ray energy spectrum. The results show that the Ca and Si are attached in the slag micro-area, while the Fe is present in areas with less Ca and Si. Most of the P appear in areas with more Ca and Si. The content of SiO2 tends to increase with an increase in the CaO content in the slag microarea. The activity of a(CaO) increases with an increase in the CaO content in the slag micro-area, while the activity of a(FeO) increases first and then decreases. In the slag microarea with an increase in the FeO content, both the mole fraction and the activity coefficient of SiO2 decrease; so, the content of SiO2 decreases gradually.