基于最小Gibbs自由能原理的鐵氧化物氣固還原熱力學研究

李彬; 郭漢杰; 郭靖; 孫貫永

doi:10.13374/j.issn2095-9389.2017.11.007

基于最小Gibbs自由能原理的鐵氧化物氣固還原熱力學研究

doi: 10.13374/j.issn2095-9389.2017.11.007

李彬^1,2,
郭漢杰^1,2, ,,
郭靖^1,2,
孫貫永^1,2

1) 北京科技大學冶金與生態工程學院, 北京 100083
2) 高端金屬材料特種熔煉與制備北京市重點實驗室, 北京 100083

基金項目:

國家自然科學基金資助項目(51274031)

詳細信息

中圖分類號: TF533.1
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出版歷程
- 收稿日期: 2017-03-06

Thermodynamics of iron oxide gas-solid reduction based on the minimized Gibbs free energy principle

LI Bin^1,2,
GUO Han-jie^{1,2
, ,},
GUO Jing^1,2,
SUN Guan-yong^1,2

1) School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
2) Beijing Key Laboratory of Special Melting and Preparation of High-end Metal Materials, Beijing 100083, China

摘要

摘要: 基于最小Gibbs自由能原理建立了鐵氧化物氣固還原反應的熱力學模型,由模型計算結果作出鐵氧化物氣固還原反應平衡圖,與文獻中實驗數據吻合良好.與常用冶金學教材和熱力學數據庫中給出的參考數據進行了對比,不同來源的熱力學數據差異較大.探究了鐵氧化物逐級還原的熱力學平衡情況.計算了CO和H₂混合氣體還原鐵氧化物的熱力學平衡,推導了平衡時氣體總利用率η_總的計算公式,作出了CO和H₂混合氣體還原鐵氧化物的三維平衡圖,并與文獻中實驗數據對比,驗證了結果的正確性.
- 鐵氧化物 /
- 氣固還原 /
- 最小Gibbs自由能原理 /
- 熱力學平衡 /
- 鐵氧化物還原平衡圖
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 references. Thermodynamic equilibrium was investigated for the stepwise reduction sequence of iron oxides. The thermodynamic equilibrium was calculated for iron oxide reduction using CO-H₂ mixtures as a reducing agent. According to the calculation results, the formula for the gas utilization ratio η_總 in the equilibrium state was deduced, and the three-dimensional equilibrium diagram of iron oxide reduction using CO-H₂ mixtures was graphed. As compared with the reported experimental data indicates the correctness of calculation results.
- iron oxides /
- gas-solid reduction /
- minimized Gibbs free energy principle /
- thermodynamic equilibrium /
- equilibrium diagram for the reduction reactions of iron oxides

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參考文獻(9)

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