BOF炼钢中液滴溶胀动力学研究  

KINETIC STUDY OF DROPLET SWELLING IN BOF STEELMAKING

作　　者：E.Chen K.S.Coley 刘岩红 

机构地区：[1]本钢集团国际经济贸易公司进口处

出　　处：《四川冶金》2011年第6期77-80,共4页Sichuan Metallurgy

摘　　要：液滴溶胀是在氧气碱性转炉炼钢中预测液滴停留时间的重要指标。实验室工作人员对氧化渣中的高碳液滴的溶胀情况进行观测。目前,用X射线荧光分析法测定溶胀率,并与反应过程中排出的气体总量进行了对比。结果表明在液滴中只有少量的气体残留并发生溶胀。气体产生速度受到液滴中CO气泡成核率的影响。成核的临界过饱和压力要比理论预测值小2个数量级,这与其他研究者在铁液中气体成核的结论基本一致。另外,表面的张力、温度及饱和压力的影响也基本与理论值一致。Previous work in the authors＇ laboratory has shown that an understanding of droplet swelling is essential in predicting droplet residence times in basic oxygen steelmaking. Several workers have ob- served swelling of high carbon droplets when present data on swelling rates measured by X exposed to oxidizing slags. In the present work, the authors -ray fluoroscopy and compare this with the total volume of gas evolved during the reaction. It is shown that only a small percentage of the gas generated is retained in the droplet to contribute to swelling. The gas generation rate is shown to be controlled by the rate of nucleation of CO bubbles inside the droplet. The critical supersaturation pressure for nucleation is found to be two orders of magnitude less than predicted from theory, which is in keeping with many other stud- ies on nucleation of gases in liquids. However, the effect of surface tension, temperature and saturation pressure shows quantitative agreement with theory.

关 键 词：氧气炼钢 脱碳 液滴反应动力学 气泡成核 

分 类 号：TF711[冶金工程—钢铁冶金]