采用数值模拟方法，对水口内钢水流场形态以及各种因素对水口沉积速率的影响作了分析研究。结果标明，滑板附近处以及水口底部的沉积比较明显；吹氩量对水口内的压力存在较大的影响，压力在滑动水口处存在突降；浇铸速度为1.2m/min的情况下，要防止吸气，最小吹氩量必须大于10L/min。Al2O3的沉积速率和Al2O3的质量浓度成线性关系；随着浇铸速度的提高，沉积速率也逐步增大。在吹氩量合适的范围内，吹氩能够降低沉积速率。对于同一拉速来说，吹氩量5L/min和30L/min对降低沉积速率的效果相近。
Molten steel flow field in tundish nozzle and influence of some factors on deposition rate were researched by method of numerical simulation. The deposition near slide gate and bottom of submerged entry nozzle(SEN) is seriously. Flowrate of argon has influence markedly upon pressure in the nozzle, and the pressure drops suddenly down the slide gate. To avoid inspiration of air, flowrate of argon is more than 10L/min when casting speed is 1.2m/min. Deposition rate of alumina is linear with mass concentration of alumina, and is also increasing with casting speed. Blowing argon decreases deposition rate at appropriate range of argon flowrate. The flowrate of 5L/min and 30L/min have the same effect for decreasing deposition rate at the same casting speed.
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