Technology of nitrogen-argon mixed gas blowing on the tundish stopper  

作　　者：FAN Zhengjie HU Shuming ZHI Jianjun 

机构地区：[1]Research Institute,Baoshan Iron&Steel Co.,Ltd.,Shanghai 201999,China [2]Steel-making Plant,Baoshan Iron&Steel Co.,Ltd.,Shanghai 201900,China

出　　处：《Baosteel Technical Research》2021年第1期42-46,共5页宝钢技术研究（英文版）

摘　　要：Bubble defect is one of the main defects of an automobile sheet.To solve this defect,the technology for nitrogen-argon mixed gas blowing on the tundish stopper is developed,the theoretical research on nitrogen absorption in the molten steel is performed,the nitrogen-argon mixed gas blowing equipment is developed and experimented in the plant.The expected effect is achieved in the industrial test,and the slab inclusion density and quality degradation ratio of the automobile sheet are significantly reduced.

关 键 词：continuous casting TUNDISH stopper clogging submerged nozzle blowing nitrogen oxygen mixture gas 

分 类 号：TF769[冶金工程—钢铁冶金] U466[机械工程—车辆工程]