常规RH和RH-TOP工艺精炼IF钢试验研究  

Experimental Investigation on Conventional RH and RH-TOP Refining Process for IF Steel Production

作　　者：刘柏松[1,2] 李本海[2] 朱国森[2] 陈斌[2] 崔爱民[3] 李焕喜[1] 

机构地区：[1]北京航空航天大学材料科学与工程学院,北京100191 [2]首钢技术研究院,北京100043 [3]首钢迁钢公司,河北迁安064404

出　　处：《钢铁》2010年第8期33-38,共6页Iron and Steel

基　　金："十一五"国家科技支撑计划项目-高品质薄板生产技术研究(2006BAE03A13)

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℃。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.

关 键 词：RH RH-TOP 脱碳 IF钢 超低碳钢 

分 类 号：TF769.4[冶金工程—钢铁冶金]