| 摘要 |
PURPOSE:To facilitate removal work for dross by providing plural injection nozzles, and making the nozzles usable respectively independently by rotation of hollow supporting cylinders. CONSTITUTION:A titled header is constituted of inside cylinders 7 which are connected at one end of hollow supporting cylinders 2 and have plural gas passing holes 8 in two rows, concentrical outside cylinders 9 which are provided so as to cover the holes 8 on the outside circumferences thereof and are closed at both ends, partition plates 10 which divide the spaces between the inside and outside cylinders, injection nozzles 3 which are provided in the space parts of the respective outside cylinders 9 partitioned by the plates 10, and flow rate regulating valves 11 which regulate the flow rates of the gases supplied from the cylinders 7. Thus the desired nozzles 3 can be selected by rotating the cylinders 2. Therefore, there is no need for stopping the operation even when the injection nozzles go out of order. |
