Melting/refining furnace for cold iron sources, and melting/refining furnace operation method

An operation method of a melting/refining furnace in which a combustion-supporting gas containing oxygen and a fuel gas are ejected toward cold iron sources in the furnace using an oxygen burner-lance, and the cold iron sources are melted and refined,

• wherein the operation method includes:
• a step in which a combustion-supporting gas is heated to a high temperature by a high-temperature gas generator provided in a combustion-supporting gas supply pipe in an oxygen burner-lance to obtain a high-temperature combustion-supporting gas;
• a step in which the high-temperature combustion-supporting gas is ejected toward the cold iron sources in the furnace as a combustion-supporting gas;
• and
• a step in which, based on a measured temperature in the furnace, an amount of the combustion-supporting gas and the fuel gas supplied to the oxygen burner-lance is controlled, and combustion of the oxygen burner-lance is started and stopped.

An operation method of a melting/refining furnace in which a combustion-supporting gas containing oxygen and a fuel gas are ejected toward cold iron sources in the furnace using an oxygen burner-lance, and the cold iron sources are melted and refined,

• wherein the operation method includes:
• a step in which a combustion-supporting gas is heated to a high temperature by a high-temperature gas generator provided in a combustion-supporting gas supply pipe of an oxygen burner-lance to obtain a high-temperature combustion-supporting gas;
• a step in which the high-temperature combustion-supporting gas is ejected toward the cold iron sources in the furnace as a combustion-supporting gas;
• and
• a step in which, based on measured values of a temperature of a discharged gas discharged from inside of the furnace, the concentration of components contained in the discharged gas, and the flow rate of the discharged gas, an amount of the combustion-supporting gas and the fuel gas supplied to the oxygen burner-lance, and an amount of the fuel gas, the combustion-supporting gas and a gas to be heated to the high-temperature gas generator are controlled, and the combustion of the oxygen burner-lance is started and stopped.