为提高鞍钢三炼钢生产的IF钢质量,对三炼钢转炉-RH精炼-连铸生产IF钢的工艺过程开展了较为系统的分析研究。研究发现试生产中RH真空精炼过程[C]含量过高,浇铸过程中增碳、二次氧化比较严重,经改进调整之后,铸坯中w(C)在30×10-6左右,w(N)在25×10-6以下,w(T.O)在20×10-6左右,达到了较高的洁净度水平。 In order to improve the quality of IF steel produced by No.3 steel making mill in Anshan Iron and Steel Group, the author conducted a systematic analysis and research on the process of producing IF steel from the third steelmaking converter, RH refining and continuous casting. The results showed that the content of [C] in RH vacuum refining during trial production was too high, carbon was added during the casting process and the secondary oxidation was serious. After adjustment and improvement, the w (C) in the slab was about 30 × 10-6, N) below 25 × 10-6, w (TO) at about 20 × 10-6, reaching a higher level of cleanliness.