工程科学学报2017，Vol.39Issue(11)：1653-1660,8.DOI:10.13374/j.issn2095--9389.2017.11.007
基于最小Gibbs自由能原理的铁氧化物气固还原热力学研究
Thermodynamics of iron oxide gas-solid reduction based on the minimized Gibbs free energy principle
摘要
Abstract
A thermodynamic model for gas-solid reduction reactions of iron oxides was established based on the minimized Gibbs free energy principle. On the basis of the model calculation results, the equilibrium diagram for the gas-solid reduction reactions of iron oxides was graphed;the equilibrium results are in good agreement with the reported experimental data. Comparison with the data from common metallurgical books and thermodynamic databases indicates big differences in thermodynamic data from different refer-ences. Thermodynamic equilibrium was investigated for the stepwise reduction sequence of iron oxides. The thermodynamic equilibri-um was calculated for iron oxide reduction using CO--H2mixtures as a reducing agent. According to the calculation results,the formula for the gas utilization ratio η总 in the equilibrium state was deduced, and the three-dimensional equilibrium diagram of iron oxide reduction using CO--H2mixtures was graphed. As compared with the reported experimental data indicates the correctness of calculation results.关键词
铁氧化物/气固还原/最小Gibbs自由能原理/热力学平衡/铁氧化物还原平衡图Key words
iron oxides/gas-solid reduction/minimized Gibbs free energy principle/thermodynamic equilibrium/equilibrium diagram for the reduction reactions of iron oxides分类
矿业与冶金引用本文复制引用
李彬,郭汉杰,郭靖,孙贯永..基于最小Gibbs自由能原理的铁氧化物气固还原热力学研究[J].工程科学学报,2017,39(11):1653-1660,8.基金项目
国家自然科学基金资助项目(51274031) （51274031）
