摘要
高铝钢连铸过程中,为了避免或减轻钢液中Al与保护渣中SiO2发生反应,设计了低SiO2、高Al2O3含量的高铝钢连铸保护渣,通过添加适量的F-调节熔渣理化性能,实验考察了F-含量对高铝钢保护渣熔点、粘度特性及渣膜传热特性的影响.结果表明,F-含量在5.8%～8.8%内,渣系中平均增加1%的F-,熔化温度降低4.5℃,保粘度降低0.004Pa·s;随F-含量增加,渣膜热流密度增加,特征时间降低;对于5.8%和8.8%F-含量保护渣,保护渣最少孕育时间均为6s,晶体生长需要的最短时间由46s缩短为30s;实验条件下,结晶动力学分析表明其按照1维方式生长.
In order to avoid or alleviate the reaction between Al in liquid steel and SiO2 in slag during the continuous casting of high-Al steel,a new mold slag with low content of SiO2 and high content of Al2O3 was designed. F-was used to adjust the physico-chemical properties of mold slag. The influence of F-content on melting point and viscosity property of slag,and heat flux through slag film in high-Al steel slag was studied by experiment. The results show that the melting point decreased by 4.5℃,and viscosity decreased by 0.004 Pa·s with F-increasing by 1% each time in the range from 5.8% to 8.8%. With the increase of F-content,heat flux through slag film increased,and the characterization time decreased. As for the slag with the F-content of 5.8% and 8.8%,the minimum incubation time of them was both 6 s,but the minimum crystallization time was deduced from 46 s to 30 s. Under this experiment condition,it developed in accordance with one dimension style,based on the analysis of crystallization kinetics.
出处
《过程工程学报》
CAS
CSCD
北大核心
2010年第6期1153-1157,共5页
The Chinese Journal of Process Engineering
基金
国家自然科学基金资助项目(编号:50874125)
关键词
高铝钢
保护渣
热流
动力学
high-Al steel
mold slag
heat flux
kinetics
作者简介
于雄（1979-），男，湖北省武汉市人，博士研究生，主要研究方向为钢铁连铸等；
文光华，通讯联系人，E-mail：wengh@cqu．edu．cn．
