Burner for refractory flame-gunning apparatus |
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| 申请号 | EP84308101 | 申请日 | 1984-11-22 | 公开(公告)号 | EP0146278A3 | 公开(公告)日 | 1985-11-21 |
| 申请人 | NIPPON STEEL CORPORATION; | 发明人 | Matsuo, Masataka c/o Nippon Steel Corporation; | ||||
| 摘要 | A refractory flame-gunning apparatus including a burner arrangement which is novel per se comprises a feeder (1), a a controller (2) and a flame-gunning burner (3). The feeder (1) comprises a refractory-powder feed section (4), a fuel feed section (5) and an oxidant feed section (6). The controller (2) controls the supply of refractory powder and fuel and oxidant. The flame-gunning burner (3) has a plurality of refractory powder and flame ejecting nozzles (81, 82) disposed at its tip. The burner has a gas mixer (65) and an oxidant cut-off valve (531. The gas mixer comprises a fuel passage (11) leading from the fuel feed section (5), an oxidant passage (14) leading from the oxidant feed section (6), a gas mixing chamber (65) communicating with the fuel and oxidant passages (11, 14), and a mixed-gas passage (31, 36) the upstream side of which communicates with the gas mixing chamber (65) and the downstream side of which communicates with the flame ejection nozzles (821. A gas mixer is provided for each individual flame nozzle. The oxidant cut-off valve is provided in the gas mixer and is actuated by gas pressure built up in the mixed-gas passage (31, 36). When backfire occurs in the apparatus the pressure in the mixed-gas passage (36) rises to close the oxidant cut-off valve (53), whereby the backfire is put out instantaneously. A temperature sensor (28) also operates a controller (36) to change the setting of valves (22-25) and replace the fuel and oxidant with inert gas delivered via inert gas lines (18, 19 and 20). | ||||||
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