Influence of phase distribution of converter slag microzones on the occurrence of P

• Main Authors: Li Chenxiao, Tong Shuai, Xue Yuekai, Wang Shuhuan
• Format: Article
• Language: English
• Published: De Gruyter 2021-03-01
• Series: High Temperature Materials and Processes
• Subjects: converter slag; phosphorus occurrence; micro-area; calcium oxide; activity
• Online Access: https://doi.org/10.1515/htmp-2021-0012

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 micro-area. 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 micro-area 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.