Abstract: It is an object to provide a gas cupola for melting a charging material efficiently by a combustion flame of a combustion burner. The gas cupola includes a furnace body having a melting chamber 10 and a molten metal discharge port 11 for discharging the molten metal and a plurality of combustion burners 4 forming a combustion flame 41. The combustion burner 4 melts the charging material 2 in the melting chamber 10 by ejecting the combustion flame 41 to the charging material 2 in the melting chamber 10. Each combustion burner 4 generates a hollow shaped melting portion 42 at the charging material 2 of the melting chamber 10 by the combustion flame 41 ejected from each combustion burner 4. In the cross sectional view of the furnace body 1 taken along a horizontal direction, the combustion burners 4 are arranged so that the adjacently positioned two hollow shaped melting portions 42 overlap with each other.

Abstract: It is an object to provide a gas cupola for melting a charging material efficiently by a combustion flame of a combustion burner. The gas cupola includes a furnace body having a melting chamber 10 and a molten metal discharge port 11 for discharging the molten metal and a plurality of combustion burners 4 forming a combustion flame 41. The combustion burner 4 melts the charging material 2 in the melting chamber 10 by ejecting the combustion flame 41 to the charging material 2 in the melting chamber 10. Each combustion burner 4 generates a hollow shaped melting portion 42 at the charging material 2 of the melting chamber 10 by the combustion flame 41 ejected from each combustion burner 4. In the cross sectional view of the furnace body 1 taken along a horizontal direction, the combustion burners 4 are arranged so that the adjacently positioned two hollow shaped melting portions 42 overlap with each other.