低温低碱度脱磷渣中磷的富集行为

At low basicity and low temperature, the dephosphorization behavior and phosphorus distribution ratio (L_P) 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 L_P 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.

Behavior of phosphorus enrichment in dephosphorization slag at low temper-ature and low basicity

At low basicity and low temperature,the dephosphorization behavior and phosphorus distribution ratio (LP) between slag and mol-ten steel in the double slag and remaining slag process were studied with a 180 t basic oxygen furnace industrial experiment.The dephosphor-ization 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 de-duced as hot metal → liquid slag phase + Fe-rich phase → P-rich phase.