METHOD FOR OPERATING STEELMAKING FURNACE DURING STEELMAKING PROCESS

摘要

PURPOSE: A method for cooling the liquid steel contained in the furnace by blowing nitrogen gas into the bath after the oxygen blow is discontinued is provided. CONSTITUTION: The method for operating a steelmaking furnace to manufacture a carbon steel product comprises the steps of charging steelmaking materials into the steelmaking furnace; blowing oxygen into the steelmaking furnace; discontinuing the oxygen blow when the charged steelmaking materials are refined to a liquid carbon steel product; determining temperature of the liquid carbon steel product; blowing a nitrogen gas coolant into the steelmaking furnace to reduce the temperature of the liquid carbon steel product to an aim tapping temperature; discontinuing the nitrogen gas coolant blow when the liquid carbon steel product temperature is lowered to the aim tapping temperature; and tapping the liquid carbon steel product at the aim tapping temperature for downstream processing.