Method of producing steel by the LD process

摘要

A method of producing steel by the LD process using a metallurgical vessel by blowing gas through an oxygen lance onto the top of the molten metal bath in the vessel for a period of time and during the final portion of the period blowing nitrogen directly into the metal bath through a gas-transmitting wall element. The duration of the final portion is from 0 to 2 minutes. The rate of gas supply through the wall element during the final portion is 5 to 8 Nm3/h per ton of metal in the vessel. This is a division of application Ser. No. 440,401 filed Nov. 9, 1982, pending.