大型高炉风口供风特性数值模拟研究  

Numerical simulation research on tuyere air supply characteristics of large blast furnace

作　　者：倪澳 李承志 张伟[2] 尹腾[3] 卢正东[3] 薛正良[2] NI Ao;LI Chengzhi;ZHANG Wei;YIN Teng;LU Zhengdong;XUE Zhengliang(Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;Hubei Provincial Key Laboratory for New Processes of Ironmaking and Steelmaking,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;China Baowu Group Wuhan Iron and Steel Co.,Ltd.,Wuhan 430080,Hubei,China)

机构地区：[1]武汉科技大学钢铁冶金与资源利用省部共建教育部重点实验室,湖北武汉430081 [2]武汉科技大学钢铁冶金新工艺湖北省重点实验室,湖北武汉430081 [3]中国宝武集团武汉钢铁股份有限公司,湖北武汉430080

出　　处：《钢铁研究学报》2022年第5期411-420,共10页Journal of Iron and Steel Research

基　　金：中国博士后科学基金资助项目(2020M672425);国家自然科学基金资助项目(51804228);湖北省自然科学基金资助项目(2020CFB133)。

摘　　要：为优化大型高炉送风系统的供风特性,以某4 000 m^(3)高炉的送风系统为研究对象,采用CFD数值模拟方法分析了风口布局、风口直径和总供风量对高炉送风管路内部及风口处压强和风速的影响规律。结果表明,大型高炉的最大风口速度一般位于距离热风总管最近的2个支管处,整体风量分布不均匀;在堵住上述2处风口后,剩余风口风量的分布均匀性有所提高;风口速度分布规律与支管入口处的压强分布规律一致,改变风口直径会显著影响支管入口处的压强,进而影响风口速度和鼓风动能。改变总鼓风量会影响送风管路各处的气体速度和压强,风口鼓风动能方差随总鼓风量的增加而显著提高。适当缩小风口尺寸或增加总鼓风量可以提高炉缸中心活跃度,抑制边缘煤气流发展。To optimize the air supply characteristics of large blast furnace, CFD numerical simulation method was used to study the air supply pipeline of a 4 000 m^(3) blast furnace, and the influence laws of tuyere distribution, tuyere diameter and total air supply volume on the air pressure and velocity inside the air supply pipeline were analyzed. The results show that for a large blast furnace, the maximum tuyere velocity is generally located at the two branch pipes closest to the air supply main pipe, and the whole tuyere air volume distribution is not uniform;after blocking the two tuyeres mentioned above, the uniformity of the air volume distribution is improved. The tuyere velocity distribution is consistent with the pressure distribution at the inlets of the air supply branch pipes. Changing the tuyere diameter will significantly affect the pressure at the inlet of the branch pipe, thereby further affecting the air velocity and blast kinetic energy at the tuyere. Changing the total air supply volume will affect the average gas velocity and pressure in the air supply pipeline, and the blast kinetic energy at the tuyere would increase significantly with total air supply volume. Reducing tuyere size or increasing total air supply volume properly can improve the hearth center activity and inhibit the development of edge gas flow.

关 键 词：大型高炉 供风特性 风口速度 鼓风参数 数值模拟 

分 类 号：TF578.2[冶金工程—钢铁冶金]