氧气高炉不同喷吹机构下煤粉燃烧行为的数值模拟研究  

Numerical simulation study on pulverized coal combustion behavior under different injection mechanisms in oxygen blast furnace

作　　者：张立坤 彭星 王静松[1] 左海滨[1] 王广[1] 薛庆国[1] 佘雪峰[1] Zhang Likun;Peng Xing;Wang Jingsong;Zuo Haibin;Wang Guang;Xue Qingguo;She Xuefeng(University of Science and Technology Beijing;Capital Engineering and Research Incorporation Limited)

机构地区：[1]北京科技大学绿色低碳钢铁冶金全国重点实验室 [2]中冶京诚工程技术有限公司

出　　处：《冶金能源》2025年第2期3-8,共6页Energy For Metallurgical Industry

基　　金：国家自然科学基金资助项目(U1960205)。

摘　　要：文章通过构建直吹管—喷枪—风口—回旋区的气粉流动燃烧三维数值模型,深入分析了三种不同风口喷吹机构(传统高炉TBF-T、氧气高炉OBF-T1和OBF-T2)下的煤粉燃烧行为。结果显示,相较于传统高炉TBF-T,OBF-T1和OBF-T2显著提高了回旋区的温度和高温区面积,煤粉燃尽率从58.2%分别提高到80.5%和76.9%。OBF-T1工况虽然提高了燃尽率,但可能引起风口内部较大的温度梯度,缩短风口使用寿命;而OBF-T2避免了高温区的产生,但氧气向回旋区下侧的扩散受阻。通过剖析煤粉与煤气在风口回旋区内的燃烧机理,为设计更长寿命和更高效的风口提供了理论依据。The article constructs a three-dimensional numerical model of gas-powder flow combustion for the lance-blowpipe-tuyere-raceway zone to deeply analyze the pulverized coal combustion behavior under three different tuyere injection mechanisms(traditional blast furnace TBF-T,oxygen blast furnace OBF-T1,and OBF-T2).The results indicate that,compared to the traditional blast furnace(TBF-T),OBF-T1 and OBF-T2 significantly increased the temperature and the area of the high-temperature zone in the tuyere region.The pulverized coal burnout rate increased from 58.2%to 80.5%and 76.9%,respectively.Although the OBF-T1 condition improves the burnout rate,it may cause a large temperature gradient inside the tuyere,shortening its lifespan.In contrast,OBF-T2 avoids the formation of high-temperature areas but encounters obstacles in oxygen diffusion to the lower side of the raceway zone.By analyzing the combustion mechanism of pulverized coal and gas in the tuyere raceway zone,the study provides a theoretical basis for designing more durable and efficient tuyeres.

关 键 词：氧气高炉 风口机构 回旋区 煤粉燃烧 数值模拟 

分 类 号：TF536[冶金工程—钢铁冶金]