摘要
根据鞍钢股份有限公司炼钢总厂三工区生产实际,研究了相关因素对转炉、精炼和连铸等工序氮含量控制的影响,总结出低氮钢的氮含量控制技术。研究表明:出钢过程为IF钢增氮的主要环节;通过转炉冶炼工序提高铁水比、冶炼过程控制返干、冶炼终点减少补吹次数和时间以及加入铁矿石(烧结矿),能够控制冶炼终点w(N)<12×10-6;RH-TB精炼工序优化处理工艺能够有效提高RH的深脱氮效果;保护浇铸能有效的控制Δw(N)<5×10-6。
According to the practices of No. 3 Steelmaking Work Area of General Steelmaking Plant of Ansteel, the effect of relevant factors on controlling nitrogen content in BOF, refining and continuous casting processes was studied, and nitrogen control technology of low nitrogen steel had been analyzed. The results indicated that increment of nitrogen mainly occurred during tapping process. By increasing hot metal ratio, controlling slag returning to dry, reducing re-blowing times and time and feeding iron ore, the mass fraction of nitrogen could be reduced obviously to less than 12×10^-6. Optimization of RH operation could improve the effect of advanced nitrogen removal. Shielded casting practice could control increment of nitrogen within 5×10^-6.
出处
《炼钢》
CAS
北大核心
2014年第1期29-33,共5页
Steelmaking
关键词
IF钢
氮含量
炼钢
精炼
连铸
IF steel
nitrogen concent
smelting
refining
continuous casting
