METAL MELTING FURNACE AND METAL MELTING METHOD

PROBLEM TO BE SOLVED: To provide a metal melting furnace and a metal melting method that can prevent exhaust gases containing carbon monoxide from being ignited in the vicinity of an exhaust outlet, and also can preheat a metal material supplied into a furnace to be effectively melted.SOLUTION: A metal melting furnace includes: a furnace 10 provided with a blowing port 31 and a hot water outlet 11; a material storage chamber 21 provided adjacent to the upper part of the furnace to store metal materials; a material loading door 23 openably and closably provided on the border between the furnace 10 and the material storage chamber 21; a combustion burner 16 provided near the bottom part of the furnace 10 for heating and melting the metal materials; an ignition burner 17 provided on the vertex part of the furnace 10; and a heat discharge passage 26 one end part of which is open into the furnace 10 and the other end part of which is open into the material storage chamber 21. The ignition burner 17 generates a secondary exhaust gas by reacting the carbon monoxide contained in the exhaust gas with the oxygen fed from the blowing port 31. The secondary exhaust gas is fed from the heat discharge passage 26 into the material storage chamber 21.