摘要
在１１８０～１３３０℃，通过测定浮氏体颗粒在流化床中被ＣＯ还原的反应速度，并应用未反应核模型处理数据，得到还原反应速度方程和表观活化能．研究表明氧离子在还原后生成铁层中的团相扩散为还原过程的限制性环节，但是过程呈现明显的两段速度特征．在反应后期（ｆ＞６５％左右），由于生成铁相发生晶格转变，使氧离子在铁层中的扩散更为困难，故反应的活化能增大，反应速度明显减慢．通过扫描电镜（ＳＥＭ）对生成铁层结构变化的研究，也进一步证实了这一点．
In order to study the kinetics of reduction of wustite in fluidized bed,laboratory scale experiments were conducted in an alumna tube (dia 19 mm) at the temperature range of 1453-1603 K. The maximum degree of reduction of wustite was found to be 87. 6N. The sticking phenomena were observed and fineMgO powder has been effectively used as additive for preventing the failure of fluidilation. The morphologicalchanges of the product layer in the reduction process were also studied with the help of SEM.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
1995年第2期115-119,共5页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金
