RH炉浸渍管非对称腐蚀的数值模拟和应用

某钢厂 100 t RH炉存在上升管与下降管非对称腐蚀的问题,下部槽在上升管侧入口处的侵蚀远大于下降管侧出口处的侵蚀，无法满足设计的下部槽与浸渍管更换频率为1∶3的要求。通过数值模拟，对RH 炉吹气进行了流场模拟,得出了上升管和下降管的速度场分布,确定了该问题存在的原因是上升管与下降管内钢液的流速差异大，采取浸渍管对调等优化措施后，下部槽和浸渍管寿命分别达到 333和111炉，第3次浸渍管能与下部槽同步下线，降低了耐材成本。

Numerical simulation and application of asymmetrical #br# corrosion of RH furnace snorkel

The corrosion of up snorkel and down snorkel in 100 t RH furnace was asymmetrical in some domestic steel plants. The corrosion of the inlet side of up snorkel would be much greater than that of the outlet side of down snorkel, which could not meet the designed demand of the replacement frequency of the bottom slot and the snorkel, which was designed at 1∶3. Through numerical simulation, the flow field of RH furnace blowing was simulated, and the velocity field distribution of up snorkel and down snorkel was obtained. The problem was caused by the big difference in the flow velocity of molten steel between the up snorkel and the down snorkel. After adopting the optimization measure such as snorkel swap, the service lives of the bottom slot and the snorkel were up to 333 heats and 111 heats, respectively. The third snorkel could be synchronized offline with the first bottom slot, which absolutely reduced the cost of refractory materials.