Behavior of phosphorus enrichment in dephosphorization slag at low temperature and low basicity  

作　　者：Ge-fan Ye Jian Yang Run-hao Zhang Wen-kui Yang Han Sun 

机构地区：[1]State Key Laboratory of Advanced Special Steel,School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2021年第1期66-75,共10页矿物冶金与材料学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (No.U1960202)。

摘　　要：At low basicity and low temperature, the dephosphorization behavior and phosphorus distribution ratio(LP) between slag and molten steel in the double slag and remaining slag process were studied with a 180 t basic oxygen furnace industrial experiment.The dephosphorization slags with different basicities were quantitatively analyzed.At the lower basicity range of 0.9–2.59, both LP and dephosphorization ratio were increased as the basicity of dephosphorization slag increased.Dephosphorization slag consisted of dark gray P-rich, light gray liquid slag,and white Fe-rich phases.With increasing basicity, not only did the morphologies of different phases in the dephosphorization slag change greatly, but the area fractions and P2O5 content of the P-rich phase also increased.The transfer route of P during dephosphorization can be deduced as hot metal → liquid slag phase + Fe-rich phase → P-rich phase.

关 键 词：DEPHOSPHORIZATION BASICITY phosphorus-rich phase SLAG converter steelmaking 

分 类 号：TF704.4[冶金工程—钢铁冶金]