| 摘要 |
A burner arrangement for ferrous scrap melting and the like includes a fuel outlet and a primary oxidant supply outlet communicating with a mixing chamber. The burner also has a main outlet and secondary oxidant supply outlets. In addition there is a convergent-divergent nozzle communicating with the mixing chamber. Valves control the flow of gaseous fuel to the fuel outlet, and the flow of primary and secondary oxidant to the primary and secondary oxidant supply outlets. In operation, oxidant is supplied to the primary and secondary outlets, hot flame or combustion gases are accelerated through the nozzle with the result that a sonic or supersonic velocity can be created. Such high velocities facilitate the penetration of the combustion gases through a slag layer into molten metal.
|
