Manufacturing method of molten iron by electric furnace

摘要

PROBLEM TO BE SOLVED: To produce molten iron in a method of melting a cold iron source in an electric furnace to produce molten iron at a lower power intensity unit as compared with the conventional method without using special equipment. SOLUTION: In an electric furnace provided with a melting chamber 1 for melting a cold iron source by arc heating and a preheating chamber 2 for preheating the cold iron source supplied to the melting chamber 1, the exhaust gas generated in the melting chamber 1 To preheat the cold iron source by passing it through the preheating chamber 2 to which the cold iron source is supplied, supply the preheated cold iron source to the melting chamber 1, and melt in the melting chamber 1 to obtain molten iron. By spraying the waste oil from the waste oil spray nozzle 3 in the preheating chamber 2, the waste oil is attached to the cold iron source, and the cold iron source to which the waste oil is attached is preheated in the preheating chamber 2. Since heat can be added to the cold iron source and the molten iron side by the waste oil adhering to the cold iron source, the electric power basic unit for melting the cold iron source to obtain molten iron can be reduced. [Selection diagram] Fig. 1