工程科学学报，第37卷，第5期：638647,2015年5月 Chinese Journal of Engineering,Vol.37,No.5:638-647,May 2015 DOI:10.13374/j.issn2095-9389.2015.05.016:http://journals.ustb.edu.cn 氧气高炉回旋区内煤粉燃烧行为的数值模拟 张仕洋，薛庆国，刘锦周，佘雪峰，王静松⑧ 北京科技大学钢铁治金新技术国家重点实验室，北京100083 ☒通信作者，E-mail:wangjingsong(@usth.cdu.cm 摘要炉顶煤气循环一氧气鼓风高炉炼铁新技术的工艺特点决定了煤粉在其回旋区内的燃烧条件与传统高炉相比将发生 很大变化.本文建立了氧气高炉直吹管一风口一回旋区下部煤粉流动和燃烧的数学模型，研究了入口布置方式、氧含量、循 环煤气温度以及H,0和CO2含量对煤粉燃烧的影响.模拟结果表明：三种引入方式中，假想的循环煤气和氧气混合进入方式 明显优于循环煤气和氧气单独进入方式.当氧的体积分数由80%增加到90%，相应的煤粉燃尽率由87.525%提高到 93.402%.循环煤气温度对煤粉燃尽率的影响并不显著.循环煤气中H,0和C0,的体积分数提高5%，风口轴线上气体的最 高温度分别降低124K和113K 关键词氧气高炉：回旋区；气一固流动：煤粉燃烧：数值模拟 分类号TF538.6 Numerical simulation of pulverized coal combustion in the raceway of an oxygen blast furnace ZHANG Shi-yang,XUE Qing-guo,LIU Jin-zhou,SHE Xue-feng,WANG Jing-song State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China Corresponding author,E-mail:wangjingsong@ustb.edu.cn ABSTRACT The technological characteristics of a top gas recycling oxygen blast furnace determine that in comparison with a tradi- tional blast furnace the combustion condition of pulverized coal in the raceway has great changes.A mathematical model of pulverized coal flow and combustion in the blowpipe-tuyere-raceway bottom is developed in this paper.The influences of entry modes,oxygen enrichment,recycling gas temperature,HO and CO contents on the burnout of pulverized coal are investigated by this model.The results indicate that an entry mode with the premixing of recycling gas and oxygen is obviously better than two other modes with recy- cling gas and oxygen entering alone.When the oxygen content changes from 80%to 90%the coal burnout increases from 87.525%to 93.402%.The effect of recycling gas temperature is not significant.The maximum gas temperature along the tuyere axis decreases by 124K with the increasing of H2O content in the recycling gas by 5%,and it drops by 113 K for CO2. KEY WORDS oxygen blast furnaces;raceways;gas-solid flow:pulverized coal combustion:numerical simulation 符号表 A,A,A2 指前因子： Ci,C2 湍流模型常数： Ap 颗粒表面积，m2: CD 拖曳系数： 质量扩散限制速率常数： Cy 粒子的比热容，JkgK: C。 原煤的质量，kg: C 经验常数，0.09： 收稿日期：2013-12-24 基金项目：国家自然科学基金委员会与宝钢集团有限公司联合资助项目(51134008)：国家科技支撑计划资助项目(2011BAC01B02)工程科学学报，第 37 卷，第 5 期: 638--647，2015 年 5 月 Chinese Journal of Engineering，Vol． 37，No． 5: 638--647，May 2015 DOI: 10． 13374 /j． issn2095--9389． 2015． 05． 016; http: / /journals． ustb． edu． cn 氧气高炉回旋区内煤粉燃烧行为的数值模拟 张仕洋，薛庆国，刘锦周，佘雪峰，王静松 北京科技大学钢铁冶金新技术国家重点实验室，北京 100083  通信作者，E-mail: wangjingsong@ ustb． edu． cn 摘 要 炉顶煤气循环--氧气鼓风高炉炼铁新技术的工艺特点决定了煤粉在其回旋区内的燃烧条件与传统高炉相比将发生 很大变化． 本文建立了氧气高炉直吹管—风口—回旋区下部煤粉流动和燃烧的数学模型，研究了入口布置方式、氧含量、循 环煤气温度以及 H2O 和 CO2 含量对煤粉燃烧的影响． 模拟结果表明: 三种引入方式中，假想的循环煤气和氧气混合进入方式 明显优于循环煤气和氧气单独进入方式． 当氧的体积分数由 80% 增加到 90% ，相应的煤粉燃尽率由 87. 525% 提高到 93. 402% ． 循环煤气温度对煤粉燃尽率的影响并不显著． 循环煤气中 H2O 和 CO2 的体积分数提高 5% ，风口轴线上气体的最 高温度分别降低 124 K 和 113 K． 关键词 氧气高炉; 回旋区; 气--固流动; 煤粉燃烧; 数值模拟 分类号 TF538. 6 Numerical simulation of pulverized coal combustion in the raceway of an oxygen blast furnace ZHANG Shi-yang，XUE Qing-guo，LIU Jin-zhou，SHE Xue-feng，WANG Jing-song State Key Laboratory of Advanced Metallurgy，University of Science and Technology Beijing，Beijing 100083，China  Corresponding author，E-mail: wangjingsong@ ustb． edu． cn ABSTＲACT The technological characteristics of a top gas recycling--oxygen blast furnace determine that in comparison with a tradi￾tional blast furnace the combustion condition of pulverized coal in the raceway has great changes． A mathematical model of pulverized coal flow and combustion in the blowpipe--tuyere--raceway bottom is developed in this paper． The influences of entry modes，oxygen enrichment，recycling gas temperature，H2O and CO2 contents on the burnout of pulverized coal are investigated by this model． The results indicate that an entry mode with the premixing of recycling gas and oxygen is obviously better than two other modes with recy￾cling gas and oxygen entering alone． When the oxygen content changes from 80% to 90% the coal burnout increases from 87. 525% to 93. 402% ． The effect of recycling gas temperature is not significant． The maximum gas temperature along the tuyere axis decreases by 124 K with the increasing of H2O content in the recycling gas by 5% ，and it drops by 113 K for CO2 ． KEY WOＲDS oxygen blast furnaces; raceways; gas--solid flow; pulverized coal combustion; numerical simulation 收稿日期: 2013--12--24 基金项目: 国家自然科学基金委员会与宝钢集团有限公司联合资助项目( 51134008) ; 国家科技支撑计划资助项目( 2011BAC01B02) 符号表 A，A1，A2 指前因子; AP 颗粒表面积，m2 ; C 质量扩散限制速率常数; C0 原煤的质量，kg; C1，C2 湍流模型常数; CD 拖曳系数; CP 粒子的比热容，J·kg － 1·K － 1 ; Cμ 经验常数，0. 09;