考虑液位波动的钢包底吹工艺优化实验  

Experimental study on the optimization of ladle bottom blowing process considering liquid level fluctuation

作　　者：田莹莹 张加财 黄凯 窦莹莹 关锐[1] 艾新港[1] TIAN Yingying;ZHANG Jiacai;HUANG Kai;DOU Yingying;GUAN Rui;AI Xingang(School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China)

机构地区：[1]辽宁科技大学材料与冶金学院,辽宁鞍山114051

出　　处：《辽宁科技大学学报》2023年第3期171-175,共5页Journal of University of Science and Technology Liaoning

基　　金：“十四五”国家重点研发计划(2021YFB3702005);辽宁省科技重大专项计划(2020JH1/10100001);辽宁科技大学大学生创新创业训练计划(X202210146173)。

摘　　要：为了探究钢包底吹工艺对混匀时间及液位波动的综合影响,以某厂30吨钢包为原型,采用水模实验方法考察底吹气流量及底吹位置对钢包混匀时间、液位波动的影响规律。实验结果表明,随着底吹气孔到中心距离的增加,混匀时间先缩短后增加,混匀时间最短的位置是0.6r,400 L/min时的混匀时间仅为65 s。混匀时间随吹气量的增加而缩短。底吹位置距离钢包壁越近,液位波动越剧烈,对钢包壁的侵蚀越大,底吹位置为0.2 r时,对电极的侵蚀较大。随着底吹流量的增加,三个测量点的波动方差均呈增大趋势,其中在近端及电极位置,波高方差从100L/min到200L/min的增长速率更快,远端位置增长速率比较稳定。综合考虑底吹工艺对混匀时间及液位波动的影响,得出底吹孔位置在0.6r、气量为200L/min时为最佳工艺条件。To investigate the comprehensive impact of the ladle bottom blowing process on mixing time and liquid level fluctuation,a 30-ton ladle was used as a prototype in this study.The water mold experimental method was employed to examine the influence of bottom blowing gas flow rate and position on ladle bottom blowing mixing time and liquid level fluctuations.The experimental findings revealed that as the distance from the bottom blowing gas hole to the center increased,the mixing time initially decreased and then increased.The position at 0.6 r exhibited the shortest mixing time,with a mere 65 seconds at a blowing gas rate of 400 L/min.Increasing the blowing gas volume resulted in a shorter mixing time.Moreover,the closer the bottom blowing position was to the ladle wall,the more intense the level fluctuation and the greater the erosion on the ladle wall.Notably,a significant erosion of the electrode was observed when the bottom blowing position was at 0.2 r.As the bottom blowing flow increased,the fluctuation variance at the three measurement points also increased.Specifically,the wave height variance showed a faster growth rate between 100 L/min and 200 L/min at the near end and electrode position,while the distal position demonstrated a more stable growth rate.Taking into account the impact of the bottom blowing process on mixing time and liquid level fluctuation,it was concluded that the optimal process conditions were achieved when the bottom blowing hole was positioned at 0.6 r and the gas volume was set at 200 L/min.

关 键 词：钢包 底吹氩 混匀时间 水模实验 

分 类 号：TF769.2[冶金工程—钢铁冶金]