METHOD FOR REDUCING NITROGEN CONTENT IN STEEL MELT OR MOLTEN STEEL BY HYDROGEN GAS INJECTION

摘要

PURPOSE: A method for reducing nitrogen content in steel melt or molten steel by hydrogen gas injection is provided, which is characterized in that hydrogen gas with strong reduction power is injected into a molten steel including nitrogen so that oxygen content of a molten steel is decreased, thus promoting denitriding reaction. CONSTITUTION: The reduction method of nitrogen content in steel melt and molten steel by hydrogen gas injection is characterized in that hydrogen gas is injected into a steel melt or molten steel in an amount of 7 to 8 L/kg·steel melt or molten steel for more than 30 minutes for denitriding.