机械力储能对石墨-磁铁矿体系碳热还原热力学的影响  

Impact of Stored Energy Derived from Mechanical Activation on Thermodynamics of Carbothermic Reduction of Graphite-magnetite Mixture

作　　者：布林朝克[1] 张邦文[1] 赵瑞超[1] 张胤[1] 

机构地区：[1]内蒙古科技大学稀土学院,内蒙古包头014010

出　　处：《矿冶工程》2012年第5期72-76,共5页Mining and Metallurgical Engineering

基　　金：国家自然科学基金项目(50974073)

摘　　要：分析了石墨和磁铁矿的机械活化能,并就其对碳气化反应及磁铁矿碳热还原反应热力学的影响进行了理论探讨。研究结果表明,石墨或磁铁矿的储能均可使磁铁矿碳热还原温度降低。磁铁矿的储能对还原热力学的影响方式是直接的,而石墨的储能对还原热力学的影响是间接的:石墨储能导致气化反应平衡常数增大,从而间接影响磁铁矿的碳热还原热力学。另外,磁铁矿的两个还原反应1/4Fe3O4+CO3/4Fe+CO2和Fe3O4+CO3FeO+CO2的转折温度随磁铁矿储能的增加而线性下降,但不受石墨储能的影响。The mechanically activated energy of graphite and magnetite and its effects on gasification of graphite and carbothermic reduction thermodynamics of magnetite were analyzed and discussed. The results show that the stored energy in either graphite or magnetite can lead to the decrease of magnetite reduction temperature. However, the stored energy in magnetite impacts the reduction thermodynamics directly, while the stored energy in graphite impacts the reduction thermodynamics indirectly, that is, the stored energy makes the equilibrium constant of gasification reaction increase, which has indirect impact on the carbothermic reduction thermodynamics of magnetite. In addition, the transition temperatures for two reduction reactions such as 1/4Fe3O4＋CO=3/4Fe＋CO2 and Fe3O2＋CO=3FeO＋CO2 decrease linearly with the increase of the stored energy in magnetite, but is not affected by the stored energy in graphite.

关 键 词：磁铁矿 石墨 机械活化 储能 气化反应 碳热还原 热力学 

分 类 号：O414.1[理学—理论物理]