高钛渣加碳氯化反应热力学在熔盐氯化中的应用

来源期刊：钢铁钒钛2010年第2期

论文作者：居殿春 严定鎏 李向阳 马恩权 臧颖波 李俊强

文章页码：32 - 36

关键词：高钛渣； 加碳氯化； 四氯化钛； 熔盐氯化； 热力学

Key words：titania-rich slag； carbochlorination； titanium tetrachloride； molten salt chlorination； thermodynamics

摘    要：通过对高钛渣各组分氧化物加碳氯化反应的热力学计算与分析,发现循环氯气中的氧气与石油焦的燃烧反应是影响熔盐氯化炉温度的主要因素,而炉温的稳定控制是提高熔盐氯化炉运行效率的关键;在900~1 500 K时,高钛渣加碳氯化热力学趋势表明:所有氧化物在氯化过程中全部转变为氯化物,但实际反应中Al₂O₃、尤其是SiO₂仅有很小一部分被氯化,同时确定了此温度区间各组分氧化物加碳氯化难易顺序;热力学条件对TiO₂和SiO₂氯化率的影响近于一致,所以从热力学角度不能进一步有效降低SiO2的氯化率而减少TiCl₄中Si含量。

Abstract: It is the major factor that combustion reaction of the return of oxygen in chlorine with petroleum coke affecting the temperature of molten salt chlorinator by calculation and analysis of carbochlorination thermodynamic of all oxides of titania-rich slag,temperature stability controlling is the key to further improve the operational efficiency of molten salt chlorinator;the thermodynamics trends of carbochlorination of titania-rich slag suggest that all of the oxides would be chlorinated into chloride during 900~1 500 K,while Al₂O₃ and SiO₂ in particular are very limited in fact,the order of carbochlorination of all oxides is determined and the chlorination rate of TiO₂ and SiO₂ is the same.So in terms of thermodynamics it is so hard to low the rate of chlorination of SiO₂ further to reduce the content of Si in TiCl₄.