摘要
为研究菱铁矿热分解过程中FeO磁化反应,给菱铁矿悬浮磁化焙烧工艺优化提供理论指导,采用气体成分分析系统对菱铁矿热分解过程中FeO磁化反应动力学进行了研究。结果表明,随着磁化反应温度的升高,达到相同反应分数所需时间逐渐缩短,反应速率的峰值逐渐升高。不同磁化反应温度下,反应分数及反应速率均随时间的变化呈现出相似的规律。同时,采用模型匹配法对试验数据分析表明:FeO磁化反应动力学符合G(α)=[-ln(1-α)]21动力学模型,其表观活化能为56.01 kJ/mol,指前因子A为6.07 s-1。菱铁矿热分解过程中FeO磁化反应过程的限制环节为气体扩散与界面反应控制。
In order to study themagnetization reaction of FeO in the thermal decomposition process of siderite,and pro?vide theoretical guidance for the optimization of the magnetron roasting process of siderite,the kinetics of FeO magnetization in the thermal decomposition of siderite was studied by gas composition analysis system. The results showed that With the in?crease of reaction temperature, the time to realize same reaction fraction become shorter, and the magnetization reaction rate increase with temperature increases. Under different magnetization reaction temperatures,the reaction fraction showed a simi?lar law with time;the magnetization reaction rate changed the same with the reaction fraction. At the same time,the model da?ta was analyzed by model matching method indicated kinetics of FeO magnetization reaction was in accordance with the kinet?ic model equation: G(α)=[-ln(1-α)]21,and the magnetization of the reaction kinetics FeO activation energy was 56.01 kJ/mol,A was 6.07 s-1. The limiting part of FeO magnetization reaction process in the thermal decomposition process of siderite is gas diffusion and interface reaction control.
作者
张琦
孙永升
韩跃新
Zhang Qi;Sun Yongsheng;Han Yuexin(School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;National-Local Joint Engineering Research Center of Refractory Iron Ore Resources Efficient Utilization Technology,Shenyang 110819,China)
出处
《金属矿山》
CAS
北大核心
2019年第2期50-53,共4页
Metal Mine
基金
国家自然科学基金项目(编号:51874071)
霍英东基金青年教师基金项目(编号:161045)
中央高校基本科研业务费项目(编号:N160104007)
