不同布料制度下炉料分布的离散单元模拟研究  

Simulation study of burden distribution under different burden distribution systems based on discrete element method

作　　者：郑华伟 闫斌 狄瞻霞 林巍 ZHENG Huawei;YAN Bin;DI Zhanxia;LIN Wei(Ironmaking Plant,Wuhan Iron and Steel Co.,Ltd.,Wuhan 430080,Hubei,China;School of Metallurgy Engineering,Anhui University of Technology,Ma'anshan 243002,Anhui,China)

机构地区：[1]武汉钢铁有限公司炼铁厂,湖北武汉430080 [2]安徽工业大学冶金工程学院,安徽马鞍山243002

出　　处：《钢铁研究学报》2024年第5期607-614,共8页Journal of Iron and Steel Research

基　　金：安徽高校自然科学研究资助项目(KJ2018A0045)。

摘　　要：布料过程是高炉操作过程中的一个关键环节,影响着炉内煤气分布及其利用。以高炉焦炭和含铁炉料等颗粒物质为研究对象,采用离散单元法,分析了“中心加焦”和“平台+漏斗”2种布料模式下的炉料分布和矿焦质量比。结果表明,2种布料模式下,均形成了中心焦炭料柱,“平台+漏斗”模式下形成的焦柱直径(1.6m)约为“中心加焦”模式(3m)的一半,“平台+漏斗”布料模式下高炉边缘的矿焦质量比“中心加焦”模式小0.75~2.55,既保证了中心气流的发展,也促进了边缘气流的发展,使得煤气利用率较高。软熔带位置的高度变化也会影响矿焦分布,位置升高,高炉边缘矿焦质量比增大,可能使得高炉边缘气流较差,进而影响高炉整体煤气利用率。The burden distribution process is a key part of blast furnace operation,affecting the gas flow distribution inside the furnace.Particulate matter such as coke and iron-bearing material of blast furnace were studied by the discrete element method,and the burden distribution and the mass ratio of ore to coke in the two distribution modes of"center coking"and"platform+funnel"were analyzed.The results show that under both distribution modes,a central coke column is formed;the diameter of the coke column formed in the"platform+funnel"pattern(1.6 m)is approximately half of that in the"central addition of coke"pattern(3 m);in the"platform+funnel"pattern,the quality ratio of ore and coke at the edge of the blast furnace is 0.75-2.55 lower than that in the"central addition of coke"pattern,which not only ensures the development of the center airflow but also promotes the development of the edge airflow,resulting in higher gas utilization rate.The height change of the position of the soft melt zone will affect the distribution of ore and coke,the higher the position of the soft melt zone,the greater the mass ratio of ore and coke at the edge of the blast furnace,it may cause poor airflow at the edge of the blast furnace,thereby affecting the overall gas utilization rate of the blast furnace.

关 键 词：高炉 布料制度 中心加焦 平台+漏斗 矿焦比 

分 类 号：TF543.3[冶金工程—钢铁冶金]