铁氧化物气固还原反应的优势区图  

Predominance Area Diagram for Gas-Solid Reduction Reactions of Iron Oxides

作　　者：张伟[1] 张菊花[1] 李强[1] 邹宗树[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2013年第10期1430-1433,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51174053);国家"十二五"科技支撑计划项目(2011BAE04B02)

摘　　要：根据铁氧化物还原体系的热力学分析,建立了优势区图计算模型.以国际广泛引用的热力学基础数据为模型参数,由计算结果绘制出铁氧化物气固还原反应的新优势区图.提出了优势区图的"三线相交原则"和"三线平行原则",并从理论上予以严格证明.热力学分析结果验证了模型的正确性,重构的优势区图可满足热力学约束条件.计算结果表明,CO和H_2还原铁氧化物的三相点温度同为576℃,此时平衡还原势分别为50.70%和75.83%,CO和H_2还原能力大小的转换温度为819℃.According to thermodynamic analyses of the iron oxides reduction reactions, a calculation model for the predominance area diagram was established. Simultaneously, taking the most recognized thermodynamic data of related substances as the parameters of the model, the predominance area diagram for gas-solid reduction reactions of iron oxides was reconstructed on the basis of the model calculation results. ＇ Three-curve-intersection＇ and ＇ three-line-parallel＇ principles for the predominance area diagram were presented and theoretically certified. Obviously, the new predominance area diagram can meet this thermodynamic constraint conditions, and the results of thermodynamic theoretical analyses proved the validity of the proposed model. The new predominance area diagram showed that the triple point of iron oxides was 576℃ for the reduction with either CO or H2, and the corresponding reduction potential were 50. 70% , 75.83% , respectively. Additionally, the reducibility transition temperature of CO and H2 was 819 ℃.

关 键 词：铁氧化物 气固还原 热力学 优势区图 还原势 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]