提高00Cr12Ti铁素体不锈钢钛回收率的工艺实践

00Cr12Ti超低碳铁素体不锈钢(%:≤0.030C、10.50～11.75Cr、6×C～0.75Ti)由90 t K-OBM-S转炉-90 t VOD-90 t LF-CC工艺冶炼。生产实践表明,随钢中自由氧含量(5～10)×10^-6和吹氩搅拌时间(1～12 min)增加,钛的收得率降低;LF喂钛线时钛的收得率高于VOD过程加块状钛合金;控制钢中全氧含量≤35×10^-6,自由氧含量≤6×10^-6,VOD过程(Cr₂O₃+FeO+MnO)≤1%,搅拌时间5～10 min,氩气流量50～80 L/min,用LF喂钛线工艺,可使钛的收得率达60%～75%。

Practice of Process to Increase Yield of Titanium in Ferrite Stainless Steel 00Cr12Ti

Ultra-low carbon ferrite stainless steel 00Crl2Ti ( % : ≤0. 030C, 10. 50-11. 75Cr, 6 x C ~ 0. 75Ti) is melted by 90 t K-OBM-S converter - 90 t VOD - 90 t LF - CC process. Production practice show that with increasing free oxygen content in steel (5 ?10) x 10^-6 and blowing argon stirring time ( 1 ~ 12 min) , the yield of titanium decreases; and the yield of titanium by feeding titanium wire in LF is higher than that by adding titanium alloy biscuit in VOD process ； with controlling total oxygen content in steel ≤35 x 10^-6, free oxygen content ≤6 X 10^-6 , ( Cr₂O₃ + FeO + MnO) ≤ 1 % in VOD process, stirring time 5 ~ 10 min, argon flow rate 50 ~80 L/min, and using feeding titanium wire process in LF, the yield of titanium is up to 60% ~ 75%.