摘要
天钢连铸钢液的增氮较为严重,冶炼含铝钢时中包的氮含量基本在70 ppm以上,连铸增氮量在30 ppm左右,而国内先进水平的连铸增氮可以控制在3~5 ppm之间。通过实验分析发现连铸增氮的主要原因是大包套管的保护浇注不到位。对连铸氩封结构和气量进行调整,最终保证了连铸钢水氮含量可以控制在30~50 ppm。
The situation of nitrogen pickup in Tiangang casting was severe.The nitrogen content ofliquid steel in tundish in the melting of steel containing aluminum was over70ppm and continuousnitrogen pickup round30ppm while the same at advanced level domestically could be controlled within3~5ppm.Test and analysis found out that the main reason for continuous nitrogen pickup was impropersubmerged casting by ladle shroud.Adjustment was made on argon sealing structure and argon flow.Eventually the nitrogen content of liquid steel in casting could be controlled within30~50ppm.
作者
邢建森
XING Jian-sen(Tianjin Iron and Steel Group Co., Ltd., Tianjin 300301, China)
出处
《天津冶金》
CAS
2017年第B08期24-26,共3页
Tianjin Metallurgy
关键词
连铸
控制
增氮
氩封
continuous casting
control
nitrogen pickup
argon sealing
