Slag entrainment in continuous casting and effect of interfacial tension
Slag entrainment in continuous casting and effect of interfacial tension
复制标题
DOI：
10.1179/1743281212y.0000000018
复制
发表时间：
2012-10
影响因子：
2.1
通讯作者：
R. Hagemann;H. Heller;S. Lachmann;S. Seetharaman;P. Scheller
中科院分区：
文献类型：
--
作者：
R. Hagemann;H. Heller;S. Lachmann;S. Seetharaman;P. Scheller
在本研究的第一部分中，无量纲临界毛细管数Ca* 和材料数Λ之间的关系被引入作为钢/渣界面处的炉渣卷吸的稳定性判据。随着接触的不混溶液体的热物理性质的知识，渣卷吸的临界值的Ca* 作为Λ的函数可以估计。采用滴重法研究了1823 K时碳钢和Cr-Ni钢与CaO、SiO2、Al 2 O3、MgO和TiO 2三元渣系的界面张力。CaO-SiO2-TiO 2渣系与Cr-Ni钢接触时的表观界面张力随TiO 2含量的增加而降低，并受毛细出口处液滴形成过程中界面面积变化、炉渣成分和钢/渣界面反应的影响。在测量过程中观察到的界面张力的最小值增加了在连续铸造模具中夹带炉渣的可能性。
In the first part of the present study, the relation between the dimension free critical capillary number Ca* and the material number Λ are introduced as a stability criteria for slag entrainment at the steel/slag interface. With the knowledge of thermophysical properties of the immiscible liquids in contact, critical values of Ca* for slag entrainment as a function of Λ could be estimated. The interfacial tension was investigated at 1823 K for carbon and Cr–Ni steels in contact with ternary slags containing CaO, SiO2, Al2O3, MgO and TiO2 using the drop weight method. The apparent interfacial tension of CaO–SiO2–TiO2 slag systems in contact with Cr–Ni steel decreases with increasing TiO2 content and was found to be influenced by interfacial area change during droplet formation at the capillary exit, slag composition and reactions at the steel/slag interface. Minimum values of interfacial tension, observed during measurements, increase the possibility for slag entrainment in the continuous casting mould.