METHOD FOR BLOWING POWDER INTO MOLTEN METAL

摘要

PURPOSE:To stabilize the pressure and flow rate of a gas by providing a double- tubed structure to a nozzle for blowing powder into molten metal in a vessel and by blowing an oxidizing gas contg. a prescribed percentage of gaseous O2 from the outer tube to remove matter sticking to the tip of the nozzle. CONSTITUTION:A double-tubed structure is provided to a nozzle for blowing powder into molten metal in a vessel 3 from the bottom or side wall of the vessel 3. Said powder and a gas for carrying the powder are fed from the inner tube 1 of the nozzle, and an oxidizing gas contg. >=50% O2 is fed from the outer tube 2.