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采用数值模拟方法分析了不同工艺因素对RH精炼中夹杂物去除过程的影响。数值结果表明:小尺寸夹杂物的碰撞长大可有效降低其数量密度,大尺寸夹杂物主要通过上浮去除;浸渍管插入深度、真空室压力和吹氩量是影响夹杂物去除的3个重要参数,其中吹氩量最为显著;在避免发生卷渣的前提下,减小浸渍管插入深度有利于夹杂物去除;在合金化脱氧后,保持较高的真空度可促进夹杂物的去除;在浸渍管插入深度为500 mm,真空度为1kPa的条件下,吹氩量达到2000 L时夹杂物去除率可达到75%;吹氩量达到饱和值后,进一步增大吹氩量不能继续促进10μm以上夹杂物的去除。
The effect of different process factors on the inclusion removal in RH refining was analyzed by numerical simulation. The numerical results show that the collisions of small inclusions can effectively reduce the number density, and the large inclusions are mainly removed by floating. The immersion tube depth, vacuum chamber pressure and argon blowing amount are the three important parameters that affect the removal of inclusions , In which the amount of argon is the most significant; in order to avoid the occurrence of entrapment under the premise of reducing immersion tube insertion depth is conducive to inclusion removal; in the alloying deoxidation, maintaining a high degree of vacuum can promote the removal of inclusions; impregnated When the argon injection amount reaches 2000 L, the inclusion removal rate can reach 75% when the tube insertion depth is 500 mm and the degree of vacuum is 1 kPa. After the argon blowing amount reaches the saturation value, further increase of the argon blowing amount can not continue to promote inclusion of more than 10 μm Removal of things.