CONVERTER STEELMAKING METHOD

摘要

[Problem] It is to provide a converter steelmaking method capable of efficiently performing dephosphorization refining in the production of molten steel by simultaneous decarburization refining and dephosphorization refining of molten iron in a converter, which is advantageous over the conventional method. [Solution] In a converter steel making method by supplying gaseous oxygen into a converter to perform decarburization refining of molten iron while adding a powdery CaO-containing dephosphorizing agent to form a slag of the dephosphorizing agent to perform simultaneous decarburization and dephosphorization of molten iron to thereby produce molten steel, the dephosphorizing agent is supplied to a bath surface of the molten iron together with at least one gas jet from the top blowing lance and a dynamic pressure when the gas jet from the top blowing lance is impinging onto the bath surface of the molten iron is controlled to an appropriate value in consideration of an increase due to the kinetic energy of the accompanying dephosphorizing agent.