| 摘要 |
PROBLEM TO BE SOLVED: To reduce unstableness or blowout of a flame at the time of operating a valve, which has been a defect of an oxygen burner. SOLUTION: An oxygen burner has such an arrangement that an outer pipe 2 for providing a fuel gas is provided at an outer side of an inner pipe 1 for supplying primary oxygen, and that secondary oxygen is supplied between the pipe 2 and a burner tile 3 disposed at an outer side of the pipe 2. Specifically, an orifice 4 is formed between the outer peripheral surface of the pipe 1 and the inner peripheral surface of the pipe 2, and also a straight portion 5 having not less than a given length is formed between the orifice 4 and the tips of the inner and outer fuel pipes 1, 2. |
