高铁水比电弧炉中钼氧化物直接合金化的工艺研究  

Investigation on direct alloying using molybdenum oxide in EAF with high ratio of hot metal

作　　者：朱守欣 

机构地区：[1]南京钢铁股份有限公司,江苏南京210035

出　　处：《炼钢》2016年第6期27-33,共7页Steelmaking

摘　　要：针对高铁水比电弧炉直接使用钼氧化物合金化的可行性问题,在某厂100t电弧炉中开展了不同钼含量、铁水比和铁水喂入速率条件下的工业试验,对无外配还原剂的情况下,以CaO为抑制剂,直接使用氧化钼进行合金化的钼收得率及质量影响进行了研究。首先通过热力学分析证明了反应的可能性,又通过动力学计算研究了炉渣成分和温度对反应速率的影响。研究发现,对于钼含量不同的两种钢种,合金收得率均可达到91%以上。相对来说,钼含量低的钢种采用钼氧化物直接合金化的钼收得率要高于钼含量高的钢种。获取高钼收得率的最优方案为铁水比760kg/t,铁水喂入速度9.0t/min,可实现钼收得率93%以上,且同时保证了很高的钢水洁净度,实现了节能减排和很好的经济效益。In view of the feasibility of direct alloying using molybdenum oxide in high metal ratio electric arc furnace（EAF）,industrial trials on direct alloying using molybdenum oxide under different molybdenum（Mo）contents,hot metal ratios and charging rates were carried out in a 100 tEAF in the current work.The feasibility of the reduction reaction was proved using thermodynamic calculation.Meanwhile,the effect of slag composition and temperature on reaction rate was predicted using kinetic calculation.Without any external reductive agents,with the addition of CaO,the alloy yield and the effect on quality of direct alloying using molybdenum oxide were investigated.It was found that the yield of Mo could be larger than 91 %for both high Mo steel grades and low Mo steel grades.Contrastively,the alloy yield in low Mo steel was larger than that in high Mo steel.And overall,the optimal conditions to reach the highest Mo yield was 760kg/t steel of hot metal ratio and 9.0t/min of charging rate of hot metal,under which the yield of Mo could be larger than 93 %,and at the same time high steel cleanliness was ensured,realizing the energy conservation and emissions reduction and valuable economic benefits.

关 键 词：钼氧化物 电弧炉 直接合金化 铁水比 铁水喂入速率 

分 类 号：TF713.3[冶金工程—钢铁冶金]