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为弄清13t复吹转炉的底枪配置及底吹氧量对熔池混合特性的影响,作者进行了水力模型实验。实验用的方法:一是在模型溶池一侧注入定量的饱和Nacl溶液,在另侧测定溶液电导率的变化,待电导率稳定的时间,即为溶池混匀的时间;二是用NaoH溶液模拟钢液,测定其对CO_2的吸收速度来模拟氧气与钢液的传质过程。实验结果表明,底枪安装位置,在单枪时以偏离中心的2~＃位搅拌效果较好,双抢时以相距0.4D底的1+1′位较好;液体对气体的传质通量AK与底部2~＃位的吹氧量有下列关系:AK=1.02+0.60V_g
In order to understand the bottom-gun configuration of 13t BOF converter and the effect of bottom blowing oxygen on the mixing characteristics of the melt pool, the author conducted a hydraulic model experiment. Experimental methods: First, the side of the model pool into a quantitative saturated solution of Nacl, the other side of the measured changes in conductivity, until the conductivity of a stable time, that is, the pool mixing time; the second is NaoH The solution simulates the molten steel and determines the absorption rate of CO 2 to simulate the mass transfer of oxygen and molten steel. The experimental results show that the installation position of the bottom gun is better when the 2 ~ # position deviated from the center when single gun is used, and the 1 + 1 ’position at the bottom of 0.4D is better when the double gun is grabbed. The mass transfer flux of the liquid to the gas AK and the bottom of the 2 # bit oxygen volume has the following relationship: AK = 1.02 + 0.60V_g