MELTING/REFINING FURNACE FOR COLD IRON SOURCES, AND MELTING/REFINING FURNACE OPERATION METHOD

摘要

The purpose of the present invention is to provide a melting/refining furnace for cold iron sources and a melting/refining furnace operation method, whereby it becomes possible to improve the heating efficiency of a raw material and reduce the amount of electric power required for the melting of the raw material without causing the oxidization of the raw material, and to reduce a melting/refining time, and to improve productivity and reduce cost. The present invention provides a melting/refining furnace which is equipped with at least one through-hole (21) configured to penetrate through a furnace wall (2A) of an electric furnace (2) and an oxygen burner lance (3) arranged at the through-hole (21), in which the oxygen burner lance (3) has at least one combustion enhancing gas supply tube (31) and at least one fuel gas supply tube (32) each having an opening communicating with the inside of the electric furnace (2), and a high-temperature gas generation device 10 is provided in at least one of the combustion enhancing gas supply tubes (31).