高速连铸结晶器卷渣缺陷的特征、演变及控制  

Research on characteristics, evolution and control of entrapped mold flux defects in high speed continuous casting

作　　者：郑万[1,2] 寇锦荣 陈小龙 陈利 周从锐 邓琛 李光强[1,2] ZHENG Wan;KOU Jinrong;CHEN Xiaolong;CHEN Li;ZHOU Congrui;DENG Chen;LI Guangqiang(Key Laboratory of Iron and Steel Metallurgy and Resource Utilization of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Provincial Key Laboratory for New Process of Ironmaking and Steelmaking,Wuhan University of Science and Technology,Wuhan 430081,China;Liuzhou Iron and Steel Co.,Ltd.,Liuzhou 545002,China)

机构地区：[1]武汉科技大学,钢铁冶金与资源利用教育部重点实验室,湖北武汉430081 [2]武汉科技大学,钢铁冶金新工艺湖北省重点实验室,湖北武汉430081 [3]柳州钢铁股份有限公司,广西柳州545002

出　　处：《炼钢》2021年第4期30-37,84,共9页Steelmaking

基　　金：国家自然科学基金钢铁联合基金重点支持项目(U1860205);武汉科技大学创新团队培育项目(2018TDX08)。

摘　　要：高效、节能、低成本的高速连铸、连铸连轧工艺得到了快速的推广应用,但面临结晶器卷渣频率增加及轧材表面卷渣类缺陷率上升的发展瓶颈。分析了连铸结晶器卷渣的形成机制及主要影响因素,简述了卷渣类缺陷在铸坯、热轧、冷轧材的表现形式及演变规律,回顾了连铸结晶器卷渣的控制措施。针对现有措施难以适应高速连铸发展的不足,提出了结晶器内钢水流场的电磁调控、液面的智能控制及高卷渣阻抗的连铸保护渣开发等重点发展方向,为促进高效连铸及连铸连轧工艺的高质量发展提供参考。High speed continuous casting, continuous casting and rolling process with high efficiency, energy saving and low cost advantages have been rapidly popularized and applied, but encountered development bottleneck due to an increasing frequency of mold flux entrapment in high speed continuous casting and entrapped mold flux defects in rolled products. In this paper, the formation mechanism of mold flux entrapment and its main influence factors were analysed, and characteristics of slag entrapment defect in the slab, hot rolled products and cold rolled products, and their evolution law were briefly described. Finally the control measures of mold flux entrapment in high-speed continuous casting were reviewed. In view of the shortage of existing measures to adapt to the development of high-speed continuous casting, the key development directions are put forward, such as electromagnetic control of the flow field in mold, intelligent control of mold liquid level and development of high-performance mold flux, which can provide reference for promoting the high-quality development of high efficiency continuous casting, continuous casting and rolling process.

关 键 词：高速连铸 卷渣缺陷 结晶器卷渣机制 流场电磁控制 液面智能调控 

分 类 号：TF777.7[冶金工程—钢铁冶金]