铁矿石等温气固还原动力学研究  

Kinetics of isothermal reduction of iron ore by gas

作　　者：邵久刚[1] 张建良[1] 刘征建[1] 国宏伟[1] 杨广庆[2] 王广伟[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]河北联合大学冶金与能源学院,河北唐山063009

出　　处：《材料与冶金学报》2015年第1期24-28,共5页Journal of Materials and Metallurgy

基　　金：国家重点基础研究发展计划资助(973计划)(NO.2012CB720401);十二五国家科技支撑计划(NO.2011BAC01B02)

摘　　要：将未反应核模型拓展应用于烧结矿气相还原,采用四阶龙格库塔法通过编制程序求解混合控制方程.通过数值计算与实验数据的对比,证明烧结矿的气固还原过程和球团矿一样可以用未反应核模型来描述.烧结矿形状不规则,不具有明确的半径,通过与前人研究的比较,本文摒弃了传统处理中的平均半径选取,利用数据分析得到了适用于烧结矿的等效半径,解决了烧结矿应用未反应核模型时的半径选取问题,为铁矿气固还原动力学的研究提供了新的参考.The gaseous reduction of the sinters by CO- N2 at 900 ℃ was solved by an extended unreacted core model. The mix controlling equation was calculated through a four- order Runge Kutta method by using C＋＋programming language. Compared the calculated data with the experimental ones,it was proved that the gas- solid reduction of the sinters can be described by the unreacted core model as same as the pellet does. Owing to the anomal shape and the indefinite radius of the sinter,abandoning the traditional approach,the authors found an＂equivalent radius＂suitable to the sinter through data analysis. It＇s believed that the authors＇ finding will provide a new reference for this field.

关 键 词：铁矿石 气固还原动力学 未反应核模型 等效半径 

分 类 号：TF55[冶金工程—钢铁冶金]