机械活化铁氧化物的碳热还原热力学  

Carbothermic Reduction Thermodynamics of Mechanically Activated Iron Oxide

作　　者：布林朝克[1] 郭婷[2] 赵瑞超[1] 张邦文[1] 张胤[1] 

机构地区：[1]内蒙古科技大学稀土学院 [2]内蒙古科技大学能源与环境学院

出　　处：《金属矿山》2012年第12期41-45,共5页Metal Mine

基　　金：国家自然科学基金项目(编号:50974073);内蒙古自然科学基金项目(编号:2012MS0710)

摘　　要：为了从理论上揭示机械活化对铁氧化物碳热还原的影响规律,分析了机械活化铁氧化物的储能构成,并建立了铁氧化物机械力储能与碳热还原热力学之间的联系。研究结果表明:对铁氧化物碳热还原热力学产生显著影响的机械力储能形式是位错吉布斯自由能和无定形化吉布斯自由能;铁氧化物的碳热还原温度随机械力储能的增加而降低(其中Fe2O3的碳热还原温度降低不显著);另外,Fe3O4从按照1/4Fe3O4+CO=3/4Fe+CO2发生还原转为按照Fe3O4+CO=3FeO+CO2发生还原的转折温度随Fe3O4机械力储能的增加而线性下降。For the purpose of revealing the thermodynamic impact of mechanical activation on the carbothermic reduction of iron oxides,the constituent of stored energy in mechanically activated iron oxides was analyzed,and a functional link between stored energy and carbothermic reduction thermodynamics was founded.The research result showed that the forms of stored energy responsible for remarkably impacting the reduction thermodynamics are dislocation Gibbs free energy and amorphism Gibbs free energy.Carbothermic reduction temperature decreases with the increase of the stored energy for iron oxides（the decrease is not remarkable for the carbothermic reduction of Fe2O3）.For the reduction of Fe3O4,the temperature for the transition of 1/4Fe3O4＋CO=3/4Fe＋CO2 into Fe3O4＋CO=3FeO＋CO2 decreases linearly with the increase of stored energy for Fe3O4.

关 键 词：铁氧化物 机械活化 储能 碳热还原 热力学 

分 类 号：TQ174.758[化学工程—陶瓷工业]