ELECTRIC ARC MELTING FACILITY AND METHOD FOR PRODUCING MOLTEN METAL BY USING ELECTRIC ARC MELTING FACILITY

摘要

Provided is an electric arc melting facility in which a source iron can be melted with high thermal efficiency and supply of the source iron from a preheating chamber to a melting chamber can be controlled and an operation method for the molten metal using the electric arc melting facility. An electric arc melting facility 1 includes a melting chamber 2 configured to melt a source iron therein, a shaft- shaped preheating chamber 4 directly connected to the melting chamber, and an electrode 3. At least a part of a bottom surface of the preheating chamber 4 is formed as an inclined bottom surface 7a inclined downward toward the melting chamber 2. A shaft opening dimension H is set to an optimum value for controlling the supply of the source iron. A pushing device 6 is disposed at a lower side of the preheating chamber 4 and configured to move the source iron toward the melting chamber 2. The source iron is supplied from the preheating chamber 4 to the melting chamber 2 when the pushing device 6 is operated. The supply of the source iron from the preheating chamber 4 to the melting chamber 2 is stopped when the operation of the pushing device 6 is halted. The optimum value of the shaft opening dimension H is set so as to satisfy the relationship "A ≤ H ≤ 4A", where A is a maximum length of the source iron.