菱镁矿基脱硫剂铁水预脱硫过程的热力学分析  

A Thermodynamic Analysis on Magnesite Based Desulfurizer in Preliminary Desulfurization Process of Hot Metal

作　　者：刘坤[1] 高鑫[1] 邢飞[1] 景成岩[1] 李晋[1] 

机构地区：[1]辽宁科技大学材料与冶金学院,鞍山114051

出　　处：《特殊钢》2013年第4期1-4,共4页Special Steel

基　　金：辽宁省镁资源办资助项目(2011801);辽宁省"大学生创新创业训练计划"项目(201210146004);高等学校博士点专项科研基金资助项目(20102120120001)

摘　　要：热力学计算和分析表明,常压下碳还原MgO的反应温度(7)为1854℃,难以实现菱镁矿基在铁水预处理条件下生成镁原位脱硫。当碳热还原反应在1250～1300℃发生时,镁蒸气的压强需小于0.994 kPa;在1350～1400℃时,镁蒸气压需小于1.004 kPa。铝粉和Fe_2O_3可作为发热剂加入,在热力学上有利于碳热还原反应的进行。Thermodynamic calculation and analysis results show that in ordinary pressure the reaction temperature （T） of carbon-thermal reduction for MgO is 1 854 22 , it is difficult under hot metal pre-treatment condition to realize situ desulfurization by generating magnesium from magnesite based desulfurizer. As carbon-thermal reduction occurs at 1 250 ~ 1 300 ℃ , the vapour pressure of magnesium must be less than 0. 994 kPa, moreover at 1 350 - 1 400 ℃ , the vapour pressure of magnesium should be less than 1. 004 kPa. In thermodynamics adding aluminum powder and Fe2O3 as thermite is available to carry out the carbon-thermal reduction and accelerate the magnesium vapor generation.

关 键 词：菱镁矿 铁水预脱硫 碳热还原温度 发热剂 热力学分析 

分 类 号：TF535.22[冶金工程—钢铁冶金]