常规RH和RH-TOP工艺精炼IF钢试验研究
来源期刊:钢铁2010年第8期
论文作者:刘柏松 李本海 朱国森 陈斌 崔爱民 李焕喜
文章页码:33 - 38
关键词:RH; RH-TOP; 脱碳; IF钢; 超低碳钢
Key words:RH; RH-TOP; decarburization; IF steel; ultra-low carbon steel
摘 要:利用工业试验,研究了常规RH和RH-TOP精炼处理IF钢的脱碳过程、钢水氧含量、真空室压力、废气流量及成分、钢水温降的变化。根据表观脱碳速率常数的不同,两种精炼方式下脱碳过程分别呈现"两段式"和"三段式"变化规律,均可以在20 min内稳定生产碳质量分数低于15×10-6的IF钢;吹氧使得真空室压降平台处压力升高,平台时间延长,不利于提高脱碳速率,且吹氧过量导致脱碳终点氧含量大幅升高。采用RH-TOP吹氧时,CO的二次燃烧产生的热补偿可以降低转炉出钢温度20~30℃。
Abstract: The changes of decarburization process,[O] content in molten steel,vacuum vessel pressure,waste gas flow rate and composition,and temperature drop of molten steel during conventional RH and RH-TOP treatment of IF steel were investigated through industrial experiments.According to the different apparent decarburization rate constants,the decarburization processes of the two refining methods presented "two-stage style" and "three-stage style",respectively,which could produce IF steel under 15×10-6 in carbon within 20min stably.With O2 blowing,the pressure of vacuum pressure drop platform was higher and the time of platform was longer,which was harmful to increase decarburization rate.The [O] content at the decarburization final point rose when the quantity of blew O2 was excessive.The converter tapping temperature could be reduced 20-30℃ by the heat compensation of RH-TOP decarburization with O2 blowing.
刘柏松1,2,李本海2,朱国森2,陈斌2,崔爱民3,李焕喜-2
(1.北京市北京航空航天大学材料科学与工程学院
2.北京市首钢技术研究院
3.首钢迁钢公司,河北迁安 064404)
摘 要:利用工业试验,研究了常规RH和RH-TOP精炼处理IF钢的脱碳过程、钢水氧含量、真空室压力、废气流量及成分、钢水温降的变化。根据表观脱碳速率常数的不同,两种精炼方式下脱碳过程分别呈现"两段式"和"三段式"变化规律,均可以在20 min内稳定生产碳质量分数低于15×10-6的IF钢;吹氧使得真空室压降平台处压力升高,平台时间延长,不利于提高脱碳速率,且吹氧过量导致脱碳终点氧含量大幅升高。采用RH-TOP吹氧时,CO的二次燃烧产生的热补偿可以降低转炉出钢温度20~30℃。
关键词:RH; RH-TOP; 脱碳; IF钢; 超低碳钢