METHOD FOR SUPPRESSING SLOPPING IN PRESSURIZED CONVERTER AND STEELMAKING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a method in which oxygen is blown to molten steel in a high productivity and a high yield by suppression of a slopping. SOLUTION: When oxygen is blown to molten iron by setting the pressure Pe in a pressurized converter to higher pressure than an atmosphere over the whole or a part period during the blowing, the blowing is performed while suppression of the slopping so that a parameterαshown with the relational expression;α=τ/(L/L0) among a uniform mixing timeτ(s) with a bottom-blown stirring, a bath depth L0 (mm) of the molten iron and a cavity depth L (mm) formed on the molten iron surface with the top-blown gas becomes <=400.