Method for manufacturing composite deoxidizer of molten steel and the composite deoxidizer by using the mothod thereof

摘要

PURPOSE: A composite deoxidizer is provided which has high density by adding a reinforcing element to aluminum matrix, and a method is provided which deoxidizes and alloys molten steel and slag using the composite deoxidizer is provided. CONSTITUTION: In a deoxidizer injected into molten metal during manufacturing of steel and iron, the composite deoxidizer is characterized in that the deoxidizer increases relative specific gravity for molten metal by solidifying aluminum in an iron pipe. The method for treating molten steel using a composite deoxidizer comprises the steps of injecting the composite deoxidizer into molten metal, specific gravity of the composite deoxidizer has an initial density of 0.4 or more compared with density of molten steel by adding a metal reinforcing element to aluminum matrix; and melting the composite deoxidizer into molten metal as continuously increasing relative density of the composite deoxidizer to 1.00 to 1.05. The method for deoxidizing slag using a slag deoxidizer is characterized in that the slag deoxidizer is manufactured by adding 20 to 50 wt.% of additive CaO and 10 to 30 wt.% of reinforcing element iron piece to molten metal of 15 wt.% of Mg and 85 wt.% of Al. The method for deoxidizing slag using a slag deoxidizer is characterized in that slag is deoxidized above the slag deoxidizer by injecting the manufactured slag deoxidizer into slag after manufacturing the slag deoxidizer by adding 20 to 50 wt.% of additive CaO and 10 to 30 wt.% of reinforcing element iron piece to molten metal of 15 wt.% of Mg and 85 wt.% of Al.