工程科学学报，第37卷，第4期：499508,2015年4月 Chinese Journal of Engineering,Vol.37,No.4:499-508,April 2015 DOI:10.13374/j.issn2095-9389.2015.04.015:http://journals.ustb.edu.cn 炉顶煤气循环氧气高炉一维气固换热与反应动力学 模型 金鹏”，姜泽毅2区，包成2》，陆元翔”，张建良》，张欣欣 1)北京科技大学机械工程学院，北京1000832)北京科技大学北京高校节能与环保工程研究中心，北京100083 3)北京科技大学治金与生态工程学院，北京1000834)北京科技大学治金工业节能减排北京市重点实验室，北京100083 ☒通信作者，E-mail:zyjiang@usth.cu.cn 摘要结合风口回旋区燃烧和炉外煤气预热、脱除和循环的平衡关系，建立了氧气高炉一维气固换热与反应动力学模型， 并采用传统高炉的运行和解剖数据对模型进行了验证分析.通过模型研究了氧气含量和上部循环煤气流量对氧气高炉炉内 过程变量的影响规律.结果表明：氧气含量偏低和上部循环煤气流量不足时，会降低铁矿石还原效果，炉渣内出现大量未还 原铁氧化物：氧气含量和上部循环煤气流量的提高可以有效提高炉内C0含量和铁矿石还原速度，但提高上部循环煤气流量 会大幅提升炉顶煤气温度，增大热量损失.与传统高炉相比，氧气高炉内C0含量提高1.0~1.5倍，炉内气体还原性更强：铁 矿石还原完成位置提高1.49m,全炉还原反应速度更快：直接还原度降低55.2%~79.2%，炉内直接还原反应消耗的碳量更少. 关键词高炉：数学模型：煤气；循环：稳态：传热：反应动力学 分类号TF559 One-dimensional mathematical model for oxygen blast furnaces with top gas recycling based on heat transfer and reaction kinetics JIN Peng,JIANG Ze-yi,BAO Cheng,LU Yuan-xiang,ZHANG Jian-liang,ZHANG Xin-xin 1)School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China 2)Beijing Engineering Research Center of Energy Saving and Environmental Protection,Beijing 100083,China 3)School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083.China 4)Beijing Key Laboratory of Energy Saving and Emission Reduction for Metallurgical Industry,Beijing 100083,China Corresponding author,E-mail:zyjiang@ustb.edu.cn ABSTRACT A one-dimensional mathematical model based on heat transfer and reaction kinetics was developed for an oxygen blast fumace and was validated with the operating conditions and dissected data of a conventional blast furnace.The influence of oxygen concentration and upper gas volume on the smooth operation and process variables of the oxygen blast furnace was investigated by the model combined with coal combustion at tuyeres and top gas balance for separation and preheating.When the oxygen blast furnace with top gas recycling is of low oxygen concentration and upper gas volume,the reduction of iron ore is worsen and massive unreduced iron oxide comes into slag.In the oxygen blast furnace with top gas recycling,oxygen concentration and upper gas volume have significant effect on the temperature,reducing ability of gas and reduction rate.A comparative analysis of the conventional blast furnace and the oxygen blast furnace with top gas recycling show that the oxygen blast furnace has a higher reducing ability of gas (1.0 to 1.5 times higher for CO content),faster reduction rate (1.49 m higher for the position of ore reduction),and less direct reduction (55.2%to 79.2%less for direct reduction degree). KEY WORDS blast furnaces;mathematical models:gas;recycling:steady state:heat transfer;reaction kinetics 收稿日期：2014-11-15 基金项目：国家自然科学基金资助项目(51134008)，国家重点基础研究发展计划资助项目(2012CB720401)工程科学学报，第 37 卷，第 4 期: 499--508，2015 年 4 月 Chinese Journal of Engineering，Vol． 37，No． 4: 499--508，April 2015 DOI: 10． 13374 /j． issn2095--9389． 2015． 04． 015; http: / /journals． ustb． edu． cn 炉顶煤气循环氧气高炉一维气固换热与反应动力学 模型 金 鹏1) ，姜泽毅1，2) ，包 成1，2) ，陆元翔1) ，张建良3) ，张欣欣1，4) 1) 北京科技大学机械工程学院，北京 100083 2) 北京科技大学北京高校节能与环保工程研究中心，北京 100083 3) 北京科技大学冶金与生态工程学院，北京 100083 4) 北京科技大学冶金工业节能减排北京市重点实验室，北京 100083  通信作者，E-mail: zyjiang@ ustb． edu． cn 摘 要 结合风口回旋区燃烧和炉外煤气预热、脱除和循环的平衡关系，建立了氧气高炉一维气固换热与反应动力学模型， 并采用传统高炉的运行和解剖数据对模型进行了验证分析． 通过模型研究了氧气含量和上部循环煤气流量对氧气高炉炉内 过程变量的影响规律． 结果表明: 氧气含量偏低和上部循环煤气流量不足时，会降低铁矿石还原效果，炉渣内出现大量未还 原铁氧化物; 氧气含量和上部循环煤气流量的提高可以有效提高炉内 CO 含量和铁矿石还原速度，但提高上部循环煤气流量 会大幅提升炉顶煤气温度，增大热量损失． 与传统高炉相比，氧气高炉内 CO 含量提高 1. 0 ～ 1. 5 倍，炉内气体还原性更强; 铁 矿石还原完成位置提高 1. 49 m，全炉还原反应速度更快; 直接还原度降低 55. 2% ～ 79. 2% ，炉内直接还原反应消耗的碳量更少． 关键词 高炉; 数学模型; 煤气; 循环; 稳态; 传热; 反应动力学 分类号 TF559 收稿日期: 2014--11--15 基金项目: 国家自然科学基金资助项目( 51134008) ，国家重点基础研究发展计划资助项目( 2012CB720401) One-dimensional mathematical model for oxygen blast furnaces with top gas recycling based on heat transfer and reaction kinetics JIN Peng1) ，JIANG Ze-yi1，2)  ，BAO Cheng1，2) ，LU Yuan-xiang1) ，ZHANG Jian-liang3) ，ZHANG Xin-xin1，4) 1) School of Mechanical Engineering，University of Science and Technology Beijing，Beijing 100083，China 2) Beijing Engineering Ｒesearch Center of Energy Saving and Environmental Protection，Beijing 100083，China 3) School of Metallurgical and Ecological Engineering，University of Science and Technology Beijing，Beijing 100083，China 4) Beijing Key Laboratory of Energy Saving and Emission Ｒeduction for Metallurgical Industry，Beijing 100083，China  Corresponding author，E-mail: zyjiang@ ustb． edu． cn ABSTＲACT A one-dimensional mathematical model based on heat transfer and reaction kinetics was developed for an oxygen blast furnace and was validated with the operating conditions and dissected data of a conventional blast furnace． The influence of oxygen concentration and upper gas volume on the smooth operation and process variables of the oxygen blast furnace was investigated by the model combined with coal combustion at tuyeres and top gas balance for separation and preheating． When the oxygen blast furnace with top gas recycling is of low oxygen concentration and upper gas volume，the reduction of iron ore is worsen and massive unreduced iron oxide comes into slag． In the oxygen blast furnace with top gas recycling，oxygen concentration and upper gas volume have significant effect on the temperature，reducing ability of gas and reduction rate． A comparative analysis of the conventional blast furnace and the oxygen blast furnace with top gas recycling show that the oxygen blast furnace has a higher reducing ability of gas ( 1. 0 to 1. 5 times higher for CO content) ，faster reduction rate ( 1. 49 m higher for the position of ore reduction) ，and less direct reduction ( 55. 2% to 79. 2% less for direct reduction degree) ． KEY WOＲDS blast furnaces; mathematical models; gas; recycling; steady state; heat transfer; reaction kinetics