马钢低碳钢板坯高拉速连铸技术的应用  

Application of high-speed continuous casting technology for low carbon steel slab in Masteel

作　　者：邓勇[1] 杨利彬[2] 汪成义[2] DENG Yong;YANG Li-bin;WANG Cheng-yi(No.4 Steelmaking and Rolling General Plant,Masteel,Ma'anshan 243000,Anhui,China;Metallurgical Department,Central Iron and Steel Research Institute,Beijing 100081,China)

机构地区：[1]马钢第四钢轧总厂,安徽马鞍山243000 [2]钢铁研究总院冶金工艺研究所,北京100081

出　　处：《连铸》2022年第1期72-77,共6页Continuous Casting

基　　金：国家重点研发计划基金资助项目(2017YFB0304000);国家自然科学基金资助项目(52074093)。

摘　　要：为了进一步解决连铸高拉速条件下的板坯质量问题,马钢有针对性地开展了低碳钢板坯高拉速连铸技术研发工作。通过采用高效连铸防粘结技术、高效强冷结晶器控制技术、低黏度保护渣优化控制技术、水口堵塞控制技术、动态二冷凝固控制技术等技术措施,解决了高拉速条件下出现的坯壳凝固不均匀、结晶器卷渣、铸坯质量等技术难题;稳定提升1 200mm宽断面(厚度230mm)低碳钢铸坯拉速至1.8m/min;拉速由1.6提至1.8m/min之后,炉均可减少浇铸时间2.5min,连铸平均连浇炉数达到6炉以上。技术改进后,有效缩短了浇铸周期,提高了生产效率。In order to solve the slab quality problem under the condition of high casting speed in further,Masteel has carried out the research and development of high-speed continuous casting technology for low carbon steel slab.Through the use of high-efficiency continuous casting anti-sticking technology,high-efficiency and strong cooling mold control technology,low viscosity mold powder optimization control technology,nozzle clogging control technology,dynamic secondary cooling solidification control technology and other technical measures,the technical problems such as uneven solidification of billet shell,slag curling in mold and billet quality under the condition of high drawing speed are solved.The casting speed can be steadily increased to 1.8 m/min,and the casting time can be reduced by 2.5 min after the casting speed of low carbon steel with section 1 200 mm(thickness is 230 mm)is increased from 1.6 to 1.8 m/min.In addition,the average number of continuous casting heats can reach more than 6 heats.After the technical improvement,the casting cycle is effectively shortened and the production efficiency is improved.

关 键 词：高拉速 结晶器 保护渣 水口絮流 动态二冷配水 

分 类 号：TF777[冶金工程—钢铁冶金]