摘要
从界面润湿性的角度,对一些冶炼过程中的常见界面现象进行了详细分析.对于渣的泡沫化过程,主要分析了润湿性对渣的泡沫化指数的影响;对于铁水和钢液脱硫过程,主要分析了对脱硫速率和脱硫剂的利用率以及穿透钢液速率的影响;对于钢液与熔渣对耐火材料的侵蚀过程,主要分析了对耐火材料在熔渣中的饱和溶解度、熔渣在耐火材料中的侵蚀深度以及耐火材料的侵蚀速率的影响;对于钢中夹杂物的运动过程,主要分析了对钢中夹杂物的形核、聚集、去除、空间分布等影响.同时,本文总结得出了对于这些实际冶炼过程有利的界面润湿性.
A number of important links in the metallurgical production process are related to interface phenomena,including slag foaming,hot metal desulphurization,refractory erosion,converter blowing,the behavior of inclusions in steel,and so on. Interfacial wettability is an important aspect of the interfacial interaction. By controlling the interfacial wettability between two phases,it is possible to remove inclusions,improve the cleanliness of the molten steel,reduce erosion of the refractory material,improve the life of the lining material,and ensure smooth production and product quality. Thus,it is necessary to analyze interfacial phenomena in ironmaking and steelmaking with respect to interfacial wettability. In general,interfacial wettability can be measured by the contact angle and interfacial tension,and the contact angle and interfacial tension between the molten steel and slag are determined primarily by the surface active element in molten steel and the active surface component in slag. In this study,we analyzed in detail some common phenomena in the steelmaking process from the view of interfacial wettability. With respect to the slag foaming process,we mainly analyzed the effects of the contact angle and interfacial tension on the slag foaming index. To study the hot metal desulphurization process,we considered effects on the desulfurization rate and the utilization and penetration speed of the desulfurizing agent. Regarding the refractory erosion process by molten slag and steel,we primarily studied the effects on the refractory saturation slubility in molten slag,the penetration depth of molten slag in refractory material,and the refractory erosion rate. To study the behavior of inclusions in steel,we considered effects on the nucleation,aggregation,removal,and spatial distribution homogeneity of inclusions. We also summarized the conditions associated with better interfacial wettability with respect to the corresponding phenomena.
作者
程礼梅
张立峰
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,University of Shanghai,Shanghai 200072,China)
出处
《工程科学学报》
EI
CSCD
北大核心
2018年第10期1139-1157,共19页
Chinese Journal of Engineering
基金
国家自然科学基金资助项目(51725402,51504020和51704018)
关键词
润湿性
泡沫渣
耐火材料侵蚀
夹杂物形核
夹杂物去除
wettability
slag foaming
refractory erosion
inclusion nucleation
inclusion removal
