Method of producing molten iron using electric furnace including video device

A method of producing molten iron using an electric furnace that includes a preheating chamber, and a melting chamber,

• wherein the electric furnace further includes an extruder located in the preheating chamber, and a video device configured to observe an inside of the melting chamber, and
• the method comprises:
• an extrusion process, performed in the preheating chamber, of supplying a cold iron source preheated in the preheating chamber to the melting chamber by the extruder;
• and
• a melting process, performed in the melting chamber, of melting the cold iron source supplied to the melting chamber by arc heat to obtain molten iron,
• wherein in the extrusion process, one or both of a moving amount of the extruder and a time interval for moving the extruder are controlled based on visual information obtained from the video device, and
• wherein in the extrusion process, further, one or both of increasing the moving amount and reducing the time interval are performed in the case where an extrusion pressure of the extruder is 40 MPa or less.