Method for producing molten iron

Abstract

A method for melting a cold iron source with high productivity and reduced electric power unit consumption. A method for producing molten iron by melting a cold iron source with electric energy, using an electric furnace including a melting chamber and a preheating chamber, method including arranging a burner in melting chamber, burner including an injection hole that injects fuel and a combustion-supporting gas, burner being adapted to inject a flame from injection hole toward molten iron in melting chamber; blowing in a powdery or powdered auxiliary raw material such that auxiliary raw material passes through flame formed by burner; and when introducing an exhaust gas generated through combustion of burner into preheating chamber to preheat cold iron source in preheating chamber, adjusting a supply rate of fuel used for burner or auxiliary raw material, thereby preheating cold iron source in preheating chamber to a predetermined temperature.

Dependencies are inferred from the claim text.