钢铁冶金过程中的界面润湿性的基础  

Fundamentals of interfacial wettability in ironmaking and steelmaking

作　　者：程礼梅[1] 张立峰[1] 沈平 CHENG Li-mei;ZHANG Li-feng;SHEN Ping(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;School of Material Science and Engineering,Shanghai University,Shanghai 200444,China)

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]上海大学材料科学与工程学院,上海200444

出　　处：《工程科学学报》2018年第12期1434-1453,共20页Chinese Journal of Engineering

基　　金：国家重点研发计划专项资助项目(2016YFB0300102,2017YFB0304001)

摘　　要：首先介绍了界面张力和接触角的基本概念,并总结了对于高温体系,常见的界面张力以及接触角的测量方法,重点对实验过程中最常使用的座滴法进行了分析,在冶炼过程中,体系的组成,尤其是钢液中的表面活性元素以及渣中的表面活性组分能显著影响界面润湿性,同时温度对界面润湿性的影响也不可忽略,因此系统分析了这两个主要影响因素对界面润湿性的影响,最后,总结了钢铁冶金过程中常见物质间的接触角和界面张力.There are various interfacial phenomenona in ironmaking and steelmaking,including slag foaming,nucleation,aggregation,removal of inclusions in steel,and refractory corrosion. The slag-metal interface has a crucial influence on the mass transfer,energy transfer,and interfacial chemical reaction. Interfacial wettability is a very important aspect of the interfacial interaction,and studying it is essential to further understand the interfacial phenomenona. In general,the interfacial wettability can be measured by contact angle and interfacial tension. In studying interfacial phenomena,it is necessary to first measure various quantities of interfacial wettability such as surface tension,interfacial tension,and contact angle,on the same conditions of interfacial phenomena or processes. Improving the interfacial wettability can be beneficial to the control of melting and refining processes. For example,when the contact angle between the molten slag and inclusion in steel reduces and the surface tension of the molten slag increases,the adhesion between the molten slag and inclusion is stronger,and it becomes easier to remove the inclusions. Therefore,the basic concepts of contact angle and interfacial tension were first introduced in this paper. Furthermore,the common methods of measuring contact angle and surface tension in an elevated temperature system were summarized,especially for the sessile drop method,which is the mostly used in laboratory experiments. During steelmaking processes,the interfacial wettability is significantly influenced by the system compositions,especially the surface active elements in steel and the surface active composition in slag. Moreover,the influences of temperature are also considerable. Hence,the effects of these two main factors,compositions and temperature,on the interfacial wettability were analyzed in detail. Finally,the wettability among the common materials in steelmaking processes was summarized.

关 键 词：界面现象 接触角 界面张力 温度 成分 

分 类 号：TF4[冶金工程—钢铁冶金]