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通过物理模拟研究了2200mm×280mm 宽厚板坯连铸结晶器吹氩时其内界面波动行为,考察了吹气量、拉速对结晶器内液面波动的影响。结果表明:结晶器吹氩后,各气量下液面平均波高均增加了1.2倍以上,且液面影响的区域集中在距水口2/3断面宽度范围内,弯月面附近的波动影响则较小。与常规板坯连铸结晶器内液面平均波高随吹气量、拉速的增加而增大的规律不同,本实验中随这两个工艺参数的增加液面平均波高均先增大后减小,并从实验条件下得出了控制液面波动的最佳气量。
Through the physical simulation, the inner interface fluctuation behavior of 2200mm × 280mm wide slab continuous casting mold during argon blowing was studied. The influence of air blowing volume and pulling speed on the liquid level fluctuation in the mold was investigated. The results show that after argon blowing, the average wave height increases by more than 1.2 times under each gas quantity, and the area affected by the liquid surface is within the range of 2/3 of the width of the water outlet, while the fluctuation near the meniscus is more affected small. Compared with the conventional slab continuous casting mold, the average surface wave height increases with the increase of air blowing rate and pulling speed. In this experiment, the average wave height of liquid surface first increases and then decreases with the increase of these two process parameters , And obtained from the experimental conditions to control the liquid level fluctuations in the optimal amount of gas.