板坯连铸机全保护浇注工艺优化  

OPTIMIZATION OF FULL PROTECTION POURING PROCESS FOR SLAB CASTER

作　　者：常朋飞 俞学成 孙亮[1] 赵晓东[1] 柴光伟 Chang Pengfei;Yu Xuecheng;Sun Liang;Zhao Xiaodong;Chai Guangwei(Qian'an Iron and Steel Company, Shougang Co., Ltd., Qian'an 064400,Hebei)

机构地区：[1]首钢股份公司迁安钢铁公司,河北迁安064400

出　　处：《河北冶金》2021年第12期51-56,共6页Hebei Metallurgy

摘　　要：结合迁钢连铸生产情况,优化并完善了连铸机全保护浇注工艺,通过开浇前置换中间包空气、增加长水口氩气稳压计、优化中间包全保护工艺和结晶器流场优等措施,降低了钢水发生二次氧化的概率,钢中全氧含量明显减小,氮含量整体降低了10 ppm,夹杂物数量降低了4.1个/mm^(2),铸坯质量得到明显提升。Combined with the continuous casting production of Qiansteel,the fully protected pouring process of continuous caster is optimized and improved.Through measures such as changing tundish air before pouring,adding long nozzle argon manometer,optimizing tundish fully protected process and mold flow field,the probability of secondary oxidation of molten steel is reduced,the total oxygen content in steel is significantly reduced,and the nitrogen content is reduced by 10 ppm as a whole,The number of inclusions was reduced by 4.1/mm^(2),and the slab quality was significantly improved.

关 键 词：连铸 全保护浇注 长水口 结晶器流场 夹杂物 全氧量 氮含量 

分 类 号：TF713[冶金工程—钢铁冶金]