METHOD FOR ADDING VANADIUM TO MOLTEN STEEL USING VANADIUM OXIDE INSTEAD OF EXISTING FERRO-VANADIUM

摘要

PURPOSE: To provide a method for stably securing a high actual yield of vanadium and preventing cleanliness of molten steel from dropping by adding vanadium to molten steel using vanadium oxide. CONSTITUTION: The method for adding vanadium to molten steel comprises a step of injecting vanadium oxide into a ladle in an amount corresponding to a vanadium content required in a type of steel to be manufactured during tapping of a converter, and additionally injecting Al into the ladle in an amount corresponding to 40 to 60 wt.% of the injection amount of vanadium oxide injected into the ladle; a step of injecting 0.5 to 1.0 kg of slag deoxidizer per ton of molten steel into the ladle after completing tapping of the converter; and a step of performing bubbling operation on molten steel after blowing Ar or N2 gas into the tapping completed molten steel in a flow rate of 0.006 to 0.011 Nm¬3/min per ton of molten steel.