Patent ID: 8420009
Filing Date: 2013-04-16
Classification: C21C,F27B,F27D,Y02P

Abstract:
1. A gas cupola for melting metal, the gas cupola comprising: a furnace body having a non-circular shape, as viewed in cross section taken along a horizontal direction of the furnace body; a melting chamber, in the furnace body, to melt a metal-based charging material; a molten metal discharge port to discharge a molten metal formed by the metal-based charging material melted in the melting chamber; and a plurality of combustion burners, provided in the furnace body, to each eject, by burning a fuel, a combustion flame to melt the metal-based charging material in the melting chamber, wherein, in a cross section of the furnace body, taken along a horizontal direction, each of the combustion flames ejected from each of the plurality of combustion burners forms a hollow-shaped melting portion to melt the metal-based charging material in the melting chamber, wherein, the plurality of combustion burners are arranged in a circumferential direction centering on a center line of the melting chamber, so that adjacent ones of the plurality of hollow-shaped melting portions are overlapped with each other along the circumferential direction, and wherein, upon the melting of the metal-based charging material, each hollow-shaped melting portion communicates with the molten metal discharge port.