| 摘要 |
PROBLEM TO BE SOLVED: To inexpensively work a comparatively large product by obtaining flame shape and flame temperature similar as those of 5C gas by a gas having a property different from that of 5C gas in a bunsen burner. SOLUTION: This bunsen burner comprises an air-fuel mixture supply portion 2 and a burner portion 3 having a diameter larger than the air-fuel mixture supply portion 2, a mixing recirculating area 4 secured by the difference in diameters of the air-fuel mixture supply portion 2 and the burner portion 3 is formed near a bottom surface 31 of the burner portion 3 around an outlet 21 of the air-fuel mixture supply portion 2, and the bottom surface 31 has an auxiliary air hole 5 for supplying the air toward the burner 32 direction. COPYRIGHT: (C)2006,JPO&NCIPI
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