The furnace door oxygen gun series includes the combined furnace door carbon oxygen gun, furnace door special-shaped carbon oxygen gun, furnace door oxygen gun, etc., all of which are water-cooled structures. Thereinto:
(1) Carbon oxygen gun of joint furnace door: carbon oxygen gun separate process, low maintenance cost, reliable safety performance, easy to replace. The oxygen flow rate is 1000-2000Nm3/h. (Specification Ø108mm-Ø152mm)
(2) Furnace door special-shaped carbon oxygen gun: The carbon oxygen gun body is special-shaped structure, and the toner mix is fully utilized. The oxygen flow rate is 2000-4500Nm3/h. (Specification Ø262X152mm)
(3) Furnace door oxygen gun: oxygen flow rate is 1500-3200Nm3/h. (Specification Ø108mm-Ø168mm)
Process parameters and technical requirements of furnace door carbon oxygen gun:
A In order to obtain maximum kinetic energy from the oxygen jet shot by the oxygen gun nozzle under the operating pressure, to ensure that there is enough energy to stir the molten pool at a certain gun height. Reduce the decay rate of the oxygen jet along the axis, ensuring that the sprayed oxygen flow strands cover the area on the surface of the molten pool. It has a better impact radius, stirs evenly, and does not interfere with each other. In addition, there is no negative pressure area and turbulent air flow along the axis of the oxygen gun, which reduces the slag and molten metal between the holes at the end of the oxygen gun nozzle to improve the life of the nozzle. Therefore, supersonic Laval nozzles are used.
B In order to allow the toner to be fully injected with the oxygen flow, the molten steel. Minimize the loss of toner being sucked away by dusting. Increase the effectiveness of slagging and molten pool reaction. Therefore, the axis of the carbon gun and the axis of the oxygen gun maintain an angle of 2~5 degrees. This ensures that the toner jet is under the oxygen jet and also synergistically ensures the maximum service life of the two tips. The gun body is double-barreled, and the oxygen gun and carbon spray tube can be replaced independently.
The angle between the axis of the carbon oxygen gun and the axis of the nozzle is 25 ° ~ 45 °, the pipeline layout is shown in the schematic diagram, the carbon injection hole is parallel to the center line of the carbon gun body, and the total length of the gun body is about 4000mm. Mach number M=1.95. The maximum flow rate of the spray gun is based on the furnace design, when the jet length and the jet optimization at the optimal flow rate are disordered and contracted. The angle between the axis of the oxygen gun and the nozzle is 35 degrees
The amount of cooling water used in the gun ≥ 40 m3/h, and the water pressure is not less than 0.5Mpa.
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