METHOD FOR MANUFACTURING ULTRA LOW CARBON STEEL REUSING REMAINED MOLTEN STEEL

摘要

PURPOSE: A method for manufacturing ultra low carbon steel reusing remained molten steel is provided to improve productivity and to improve a distribution flow of a steel manufacturing factory. CONSTITUTION: A method for manufacturing ultra low carbon steel reusing remained molten steel comprises; a step(S110,S120) for recovering remained molten steel in insertion ladles and primarily deoxidizing by inserting a slag deoxidizing agent into the insertion ladle; a step(S130) for manufacturing molten steel; a step(S140,S150) for secondarily deoxidizing by inserting the slag deoxidizing agent into the ladle; and a step(S160) for manufacturing ultra low carbon steel by transferring the ladle contained secondarily deoxidized molten steel to a casting process. [Reference numerals] (AA) Start; (BB) End; (S110) Collecting the remaining molten steel after manufacturing ultra low carbon steel; (S120) Primarily deoxidizing the remaining molten steel; (S130) Mixing the remaining molten steel and hot metal and refining in a furnace; (S140) Performing vacuum degassing(RH) of molten steel; (S150) Secondarily deoxidizing slag after the RH process; (S160) Manufacturing ultra low carbon steel