Fundamental Research on Dephosphorization of BOF by COMI Steelmaking Process

Based on thermodynamic analysis and calculation of dephosphorization in converter steelmaking process, COMI steelmaking process, in which CO2 was used as a substitute for part O2 to control the temperature of dephosphorization, was presented. It is discovered that the bath temperature can be effectively controlled and phosphorus content of liquid steel is reduced by COMI steelmaking process. Moreover, iron losses of slag are lowered. The process will provide a new idea of converter dephosphorization with high efficiency.