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在120tAOD炉水模型装置上研究了侧顶复吹AOD精炼过程中侧吹气流的反冲现象.以特制的防水压力探头和YD21型动态电阻应变仪连续监测反冲频率和压力,由SC16A型光线示波器记录反冲波.结果表明,顶枪气流的存在并不改变侧吹气流反冲的基本特征.对复吹过程中侧吹气流的反冲,主枪气流对其起决定性作用,副枪气流有一定的抑制和缓解效应;顶枪气流使其频率降低,作用较均匀,并使其强度和单位时间内平均脉冲总数增大;熔池液体的循环运动也是引起侧吹气流反冲的一个重要原因,但其效果不同于纯侧吹过程的情况;由浮力引起的侧吹气流反冲强度的增幅比纯侧吹下要小;给定侧枪数和侧吹气量下,合宜增大枪间夹角利于缓解侧吹气流的反冲.本工作条件下,采用7枪22.5°或6枪27°时,反冲压力和单位时间内平均脉冲总数较低,反冲作用较弱.
In the 120tAOD boiler model, the backflushing phenomenon of the side blown air flow in the side-top blowing AOD refining was studied.The frequency and pressure of the recoil were continuously monitored by a special waterproof pressure probe and a YD21 dynamic resistance strain gauge, The oscilloscope records the backwash wave.The results show that the existence of the top gun air flow does not change the basic characteristics of the back-flushing of the side-blown air flow.The main gun air flow plays a decisive role in the recoil of the side-blown air flow during the double- A certain degree of inhibition and mitigation effect; top gun air flow to reduce its frequency, the role of more uniform, and to its strength and the average number of pulses per unit of time increased; circular motion of molten pool liquid is also caused by the side air flow backflush is an important Reason, but the effect is different from the pure side blowing process; the buoyancy caused by the side blowing airflow recoil intensity increase is smaller than the pure side blowing; given the number of side guns and side air volume, it is appropriate to increase the gun room With the help of 7 guns 22.5 ° or 6 guns 27 °, the recoil pressure and the average number of pulses per unit time are lower, and the recoil effect is weaker.