CONTINUOUS CASTING METHOD FOR PREVENTING CLOGGING OF SUBMERGED ENTRY NOZZLE IN MINI MILL CONTINUOUS CASTER

摘要

PURPOSE: A continuous casting method for preventing clogging of submerged entry nozzle in a mini mill continuous caster is provided to manufacture hot and cold strips as preventing clogging of the nozzle of the mini mill continuous caster when continuously casting aluminum killed steel for cold rolling produced by continuous casting. CONSTITUTION: In a method for continuously casting aluminum deoxidized steel by supplying aluminum deoxidized steel that is made into steel in an electric furnace and refining treated in LF (ladle furnace) to a mold through tundish, the continuous casting method is characterized in that Ca is added to the aluminum deoxidized steel refining treated in the ladle furnace so that Ca maintains concentration corresponding to 4 to 40 times of dissolved oxygen, and 10 to 90 g of Ca per ton of molten steel is additionally supplied to molten steel in the tundish from initiation of continuous casting to initiation of normal casting when the aluminum deoxidized steel is supplied to the mold through the tundish.