To provide a heating furnace capable of maximally and evenly filling combustion gas in a whole of a combustion space, and capable of effectively improving energy efficiency.
The heating furnace 10 has a crucible, a refractory furnace 7, and a burner. The burner is composed to supply combustion gas G1 to the combustion space 101 from a lower part of the refractory furnace. In a bottom face 72 of the refractory furnace, a refractory slope 73 is formed wherein a bottom face position becomes higher toward a combustion gas advancing direction C1 in a circumferential direction C of the refractory furnace, and the bottom face position becomes higher toward an outer side of a radial direction R of the refractory furnace. The heating furnace is composed to raise and swirl the combustion gas supplied to the combustion space from the burner by the refractory slope in the combustion space.
COPYRIGHT: (C)2009,JPO&INPIT
Shuichi Aoki
Takato Sato
Shinpei Miura
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