氧化铁微粉气相还原过程的动力学模拟

李秋菊; 洪新

您当前的位置：

首页 >

文章列表页 >

氧化铁微粉气相还原过程的动力学模拟

化工与环境工程 | 更新时间：2026-09-14

- 氧化铁微粉气相还原过程的动力学模拟
- Kinetic Simulation for Gas Reduction Process of Iron Oxide in Microscale
- 中北大学学报（自然科学版） 2009年30卷第2期页码：165-170
- 作者机构：
  
  上海大学材料科学与工程学院
- 作者简介：
- 基金信息：
  
  国家自然科学基金项目资助(50634040)
- DOI：
  中图分类号：
- 纸质出版：2009
- 稿件说明：
移动端阅览
李秋菊, 洪新. 氧化铁微粉气相还原过程的动力学模拟[J]. 中北大学学报（自然科学版）, 2009,30(2):165-170.

李秋菊, 洪新. Kinetic Simulation for Gas Reduction Process of Iron Oxide in Microscale[J]. 2009, 30(2): 165-170.
李秋菊, 洪新. 氧化铁微粉气相还原过程的动力学模拟[J]. 中北大学学报（自然科学版）, 2009,30(2):165-170. DOI：

李秋菊, 洪新. Kinetic Simulation for Gas Reduction Process of Iron Oxide in Microscale[J]. 2009, 30(2): 165-170. DOI：

摘要

考虑到微小尺度下化学反应的热效应

提出了一维传热、传质与化学反应的耦合模型对氢气还原氧化铁微粉过程中的动力学行为进行了模拟.采用全隐式有限容积法对偏微分方程组作数值求解

得到不同温度、气体初始浓度和矿粉粒径条件下矿粉的还原率

模拟结果与文献中的实验结果基本吻合.模拟结果给出了气体在固相内的扩散分布行为

及不同条件下完全还原氧化铁微粉所需要的时间

根据气体在反应过程中的扩散行为

可知气体内扩散对微细氧化铁粉气相还原速率起重要作用.粒径为200~300μm的微粒完全还原所需时间在450~1400 s之间.

Abstract

Considering the heat effect of chemical reaction in microscale

a model coupling heat and mass transfer with chemical reaction was developed to simulate the kinetic behavior of fine ferrous oxide.Finite Volume Method(FEM)with fully implicit technique were applied for solving the governing parabolic equations.The reduction degrees of fine iron oxide at different conditions of temperature

initial gas concentration and particle size were calculated with the model.The model was validated by comparing with experimental results in the literature.The gas concentration profile developing inside the ferrous oxide particle and the time of complete reduction were given.Simulation results show that the diffusion of gas inside the particle influences the reduction rate extremely

and that the time for full reduction of iron oxide with particle size of 200～300 μm is from 450 s to 1 400 s.

关键词

Keywords

references

Moon I J,Rhee C H.Reduction of hematite compacts by H2-CO gas mixtures[J].Steel Research,1998,69:302-306.

El-Geassy A A.Gaseous reduction of Wustite with H2,CO and H-CO mixture[J].Transactions ISIJ International,1985(25):449-458.

Fruehan R J,Li Y.Final stage of reduction of iron ores by hydrogen[J].Scandinavian Journal of Metallurgy,2005,34:205-212.

Dutta S K,Ghos A.Kinetics of gaseous reduction of iron ore fines[J].ISIJ International,1993,33(11):1168-1173.

Bogdandy L V,Engell H J.The Reduction of Iron Ores[M].Berlin:Springer Verlag,1971.

Barin I,Knacke O.Thermochemical Properties of Inorganic Substance[M].Berlin:Springer-verlag,1973.

Valipour M S,Motamed Hashemi M Y.Mathematical modeling of the reaction in an iron ore pellet using a mixtureof hydrogen,water vapor,carbon monoxide and carbon dioxide:an isothermal study[J].Advanced power Technol,2006,17:277-295.

Takeaki Murayama,Yoichi Oho.Analysis of CO reduction of hematite pellets by multi-interface model[J].Transactions ISIJ,1978,18:776-781.

Mondal K,Lorethova H.Reduction of iron oxide in carbon monoxide atmosphere-reaction controlled kinetics[J].Fuel Processing Technology,2004,86:33-47.

郭宽良.计算传热学[M].北京:中国科技大学出版社,1988.

Akiyama T,Takahssh R,Yagi J I.Measurements of heat transfer coefficients between gas and particles for a singlesphere and for moving beds[J].ISIJ International,1993,33:703-710.

陶文铨.数值传热学[M].西安:西安交通大学出版社,1988:72.

浏览量

271

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

大熊猫种群在小区域之间扩散对持续生存的影响

基于聚氨酯波形整形器的霍普金森杆脉宽拓展试验方法

基于机器学习的复合材料结构设计与性能表征研究进展

茶叶生物炭磁性材料对水中重金属铬的超声吸附研究

基于低分子质量PEI的类PEG聚合物基因载体