固/液态夹杂物穿过钢渣界面的分离机理

doi:10.12034/j.issn.1009-606X.217237

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

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^*

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^*

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/Abstract

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

周业连邓志银朱苗勇. 固/液态夹杂物穿过钢渣界面的分离机理[J]. 过程工程学报, 2018, 18(1): 96-102.

Yelian ZHOU Zhiyin DENG Miaoyong ZHU. Separation Mechanism of Solid/Liquid Inclusions Transfer at Steel?Slag Interface[J]. Chin. J. Process Eng., 2018, 18(1): 96-102.

参考文献

[1]赵海民，惠卫军，聂义宏，等.夹杂物尺寸对高强度弹簧钢的高周疲劳性能的影响[J].钢铁, 2008, 43(5):66-70
[2]Anmark N, Karasev A, J?nsson P G.The effect of different non-metallic inclusions on the machinability of steels[J].Materials, 2015, 8(2):751-783
[3]Miki Y, Thomas B G.Modeling of inclusion removal in a tundish[J].Metallurgical and materials transactions B, 1999, 30(4):639-654
[4]Lou W T, Zhu M Y.Numerical simulations of inclusion behavior in gas-stirred ladles[J].Metallurgical and Materials Transactions B, 2013, 44(3):762-782
[5]Yang H L, He P, Zhai Y C.Removal behavior of inclusions in molten steel by bubble wake flow based on water model experiment[J].ISIJ International, 2014, 54(3):578-581
[6]Médioni C, J?nsson P G, Sichen D.Effect of stirring practice on sulphur and nitrogen refining as well as inclusion removal in ladle treatment[J].Steel Research International, 2015, 86(12):1498-1507
[7]Valdez M, Prapakorn K, Cramb A W, et al.Dissolution of alumina particles in CaO-Al2O3-SiO2-MgO slags[J].Ironmaking & Steelmaking, 2002, 29(1):47-52
[8]Park J H, Jung I H, Lee H G.Dissolution behavior of Al2O3 and MgO inclusions in the CaO-Al2O3-SiO2 slags: formation of ring-like structure of MgAl2O4 and Ca2SiO4 around MgO inclusions[J].ISIJ International, 2006, 46(11):1626-1634
[9]Monaghan B J, Chen L, Sorbe J.Comparative study of oxide inclusion dissolution in CaO-SiO2-Al2O3 slag[J].Ironmaking & Steelmaking, 2013, 32(3):258-264
[10]Michelic S, Goriupp J, Feichtinger S, et al.Study on oxide inclusion dissolution in secondary steelmaking slags using high temperature confocal scanning laser microscopy[J].Steel Research International, 2016, 87(1):57-67
[11]Nakajima K, Okamura K.Inclusion transfer behavior across molten steel-slag interfaces[J].4th Int. Conf. on Molten Slags and Fluxes, 1992, -(-): 505-510
[12]Shannon G N, Sridhar S.Modeling Al2O3 inclusion separation across steel-slag interfaces[J].Scandinavian journal of metallurgy, 2005, 34(6):353-362
[13]Liu C, Yang S, Li J, et al.Motion behavior of nonmetallic inclusions at the interface of steel and slagPart I: model development,validation,and preliminary analysis[J].Metallurgical and Materials Transactions B, 2016, 47(3):1882-1892
[14]Yang S, Li J, Liu C, et al.Motion behavior of nonmetal inclusions at the interface of steel and slagPart II: model application and discussion[J].Metallurgical and Materials Transactions B, 2014, 45(6):2453-2463
[15]Yang S, Liu W, Li J.Motion of solid particles at molten metal-liquid slag interface[J].JOM, 2015, 67(12):2993-3001
[16]Strandh J, Nakajima K, Eriksson R, et al.A mathematical model to study liquid inclusion behavior at the steel-slag interface[J].ISIJ International, 2005, 45(12):1838-1847
[17]Strandh J, Nakajima K, Eriksson R, et al.Solid inclusion transfer at a steel-slag interface with focus on tundish conditions[J].ISIJ International, 2005, 45(11):1597-1606
[18]Valdez M, Shannon G S, Sridhar S.The ability of slags to absorb solid oxide inclusions[J].ISIJ International, 2006, 46(3):450-457
[19]Bouris D, Bergeles G.Investigation of inclusion re-entrainment from the steel-slag interface[J].Metallurgical and Materials Transactions B, 1998, 29(3):641-649
[20]Soll-Morris H, Sawyer C, Zhang Z T, et al.The interaction of spherical Al2O3 particles with molten Al2O3-CaO-FeOx-SiO2 slags[J].Fuel, 2009, 88(4):670-682
[21]Lee S H, Tse C, Yi K W, et al.Separation and dissolution of Al2O3 inclusions at slag-metal interfaces[J].Journal of Non-Crystalline Solids, 2001, 282(1):41-48
[22]Misra P, Chevrier V, Sridhar S, et al.In situ observations of inclusions at the (Mn,Si)-killed steelCaO-Al2O3 interface[J].Metallurgical and Materials Transactions B, 2000, 31(5):1135-1139
[23].邓志银，朱苗勇，钟保军，等．超低氧洁净钢的精炼渣碱度选择[A]//第十七届全国炼钢学术会议论文集[C]．杭州：中国金属学会炼钢分会，2013，400-405
[24]Yang G, Wang X, Huang F, et al.Transient inclusion evolution during RH degassing[J].Steel Research International, 2014, 85(1):26-34
[25]Yoshioka T, Nakahata K, Kawamura T, et al.Factors to determine inclusion compositions in molten steel during the secondary refining process of case-hardening steel[J].ISIJ International, 2016, 56(11):1973-1981
[26]Li J Z, Jiang M, He X F, et al.Investigation on nonmetallic inclusions in ultra-low-oxygen special steels[J].Metallurgical and Materials Transactions B, 2016, 47(4):2386-2399
[27]Fowkes F M.Attractive forces at interfaces[J].Industrial and Engineering Chemistry, 1964, 56(12):40-52
[28]Zhou Y L, Deng Z Y, Zhu M Y.Study on the separation process of non-metallic inclusion at steel-slag interface using water modelling[J].International Journal of Minerals, Metallurgy and Materials, 2017, 24(6):1-11
[29]李佟茗.小气泡或小液滴之间的聚并[J].化工学报, 1994, 45(1):38-44
[30]马春生.低成本生产洁净钢的实践[J].冶金工业出版社, 2016, :41-

固/液态夹杂物穿过钢渣界面的分离机理

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

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