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过程工程学报 ›› 2018, Vol. 18 ›› Issue (1): 96-102.DOI: 10.12034/j.issn.1009-606X.217237

• 反应与分离 • 上一篇    下一篇

固/液态夹杂物穿过钢渣界面的分离机理

周业连, 邓志银,朱苗勇*     

  1. 东北大学冶金学院,辽宁 沈阳 110819
  • 收稿日期:2017-05-19 修回日期:2017-06-07 出版日期:2018-02-22 发布日期:2018-01-29
  • 通讯作者: 周业连 zhyelian880130@163.com
  • 基金资助:
    国家自然科学基金项目

Separation Mechanism of Solid/Liquid Inclusions Transfer at Steel?Slag Interface

Yelian ZHOU,  Zhiyin DENG,  Miaoyong ZHU*     

  1. School of Metallurgy, Northeastern University, Shenyang, Liaoning 110819, China
  • Received:2017-05-19 Revised:2017-06-07 Online:2018-02-22 Published:2018-01-29

摘要: 对液态和固态夹杂物穿过钢?渣界面的分离过程进行了物理模拟实验,研究了钢包内固态夹杂物比液态夹杂物易被去除的原因. 结果表明,固态夹杂物不被钢液润湿,在界面张力的作用下,固态夹杂物与界面之间的钢液在极短的时间内被排尽,导致固体夹杂物瞬间进入渣层. 液态夹杂物易被钢液润湿,界面张力使液态夹杂物与界面之间的钢液不能排尽,形成液膜. 液膜内的钢液在压力的作用下排尽,导致液膜破裂,液态夹杂物瞬间进入渣层. 实际液态夹杂物停留在钢?渣界面处的时间明显长于固态夹杂物穿过钢?渣界面所需时间.

关键词: 分离过程, 液态夹杂物, 固态夹杂物, 钢-渣界面

Abstract: Some physical simulation experiments were carried out to understand the phenomenon that solid inclusion could be removed more easily compared with liquid inclusions in industrial practice. The results showed that the molten steel between a solid inclusion and the interface would be drained out by the interfacial tension in an extremely short time since the solid inclusions cannot be wetted by liquid steel. Subsequently, solid inclusions can enter the slag phase immediately. On the other hand, liquid inclusions can be wetted by liquid steel and the liquid steel between the inclusion and interface cannot be drained out by the interfacial tension, then a thin steel film would form. The pressure in liquid film would finally break the film, resulting in the separation of liquid inclusions. The residence time of liquid inclusions at the steel?slag interface was obviously longer than that of solid inclusions in a real case.

Key words: separation process, liquid inclusion, solid inclusion, steel-slag interface