高压-底吹氮法高氮钢冶金动力学  

Kinetic Study on Refining of High-nitrogen Steel under High Pressure and Bottom-blown Nitrogen

作　　者：白艳江[1] 王书桓[1] 赵定国[1] 刘新生[1] 

机构地区：[1]河北理工大学冶金与能源学院,河北唐山063009

出　　处：《过程工程学报》2008年第S1期223-226,共4页The Chinese Journal of Process Engineering

摘　　要：以18Cr18Mn钢为对象,对高压-底吹氮法高氮钢冶金动力学机理进行实验研究.温度分别为1860,1890,1920 K时测得氮在18Cr18Mn钢中的表观传质系数分别为3.809×10^(-3),4.061×10^(-3),5.743×10^(-3)m/min;温度为1890K、压力分别为0.5,1.0,1.5 MPa的情况下,底吹40 min后钢中的氮含量基本达到饱和.实验结果表明,增氮反应既不是一级反应也不是二级反应,而是由界面化学反应及液相边界层扩散混合控制的反应.The mechanism of refining high-nitrogen steels by high-pressure and bottom-blown nitrogen through experimentation with 18Cr18Mn was discussed.The apparent mass transfer coefficient in 18Cr18Mn liquid alloy was measured at 1860,1890 and 1920 K. Their values were 3.809×10^(-3),4.061×10^(-3)and 5.743×10^(-3)m/min,respectively.Content of N was basically saturated after blowing 40 min from bottom when the temperature was 1890 K and the pressure 0.5,1.0 and 1.5 MPa.Reaction order of the N increasing reaction was ...

关 键 词：高氮钢 表观传质系数 反应级数 氮的溶解度 

分 类 号：TF701[冶金工程—钢铁冶金]