Electric Current Field‐Assisted Inclusions Capture by Bubbles in Molten Steel,Steel Research International

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Electric Current Field‐Assisted Inclusions Capture by Bubbles in Molten Steel
Steel Research International ( IF 1.9 ) Pub Date : 2020-04-16 , DOI: 10.1002/srin.202000036
Longge Yan ₁ , Xinfang Zhang ₁

Affiliation

Electric current is used to assist bubbles in removing inclusions from molten steel. Generally, large‐size bubbles do not effectively remove inclusions but instead convectively agitate the molten steel. The results show that the number of inclusions in the sample is reduced by 45% after the large‐size bubbles are coupled with the pulsed current, whereas the amount of inclusions in the sample treated only with large‐size bubbles does not change much. Numerical calculation reveals that electric current induces a force acting on the inclusion as the inclusion is close to a bubble. According to the nature of the force, there are three different effects, i.e., repulsion, attraction, and driven. The electric free energy change is calculated as well when an inclusion is captured by a bubble. Electric current causes a longer contact time and a shorter induction time between inclusions and bubbles, thus improving the collision and attachment probability and decreasing the detachment probability. As a result, inclusions are more easily captured by bubbles.

中文翻译：

熔融钢中气泡捕获的电流场辅助夹杂物

电流用于帮助气泡去除钢水中的夹杂物。通常，大气泡不能有效地去除夹杂物，而是对流地搅拌钢水。结果表明，大尺寸气泡与脉冲电流耦合后，样品中的夹杂物数量减少了45％，而仅用大尺寸气泡处理的样品中的夹杂物数量变化不大。数值计算表明，当夹杂物接近气泡时，电流会感应作用于夹杂物的力。根据力的性质，存在三种不同的效果，即排斥，吸引和驱动。当气泡捕获夹杂物时，也会计算出自由电能量的变化。电流导致夹杂物和气泡之间的接触时间更长，感应时间更短，从而提高了碰撞和附着的可能性，并降低了脱离的可能性。结果，气泡更容易捕获夹杂物。

更新日期：2020-04-16

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