Method for refining molten steel and refining equipment using converter

摘要

In the converter refining method according to the present invention, oxygen is blown into the converter, the molten iron in the converter is blown, the process of manufacturing molten steel, the end point nitrogen concentration (N _e ) during the blowing is predicted, and carbon is contained in the converter according to the predicted results depending on whether or not the determining of input if the raw material, after blowing, satisfies the end point the molten steel temperature (T _em) process, a reference tapping temperature (T _et) the measured end point molten steel temperature (T _em) for measuring, by a converter And determining whether to input the carbon-containing raw material, depending on whether or not to input the carbon-containing raw material, determining whether to enter ferro silicon into the converter before the steel is discharged, and to discharge the molten steel from the converter. Therefore, according to the embodiment of the present invention, even if the volume of the slag is expanded by injecting the carbon-containing raw material during the refining of the converter, it is possible to effectively reduce the slag volume by introducing ferro silicon (FeSi) before exiting. Therefore, as in the prior art, after the slag is pre-excluded with the slag port before the steel is discharged, the molten steel can be immediately discharged without going into the molten steel.