高炉布料过程中多元炉料偏析的时空分布  

Spatiotemporal distribution of multicomponent burden segregation in charging process of a blast furnace

作　　者：滕召杰 陈建 杨宜璋 李晨瑞 武建龙 吴胜利 徐健[3] TENG Zhaojie;CHEN Jian;YANG Yizhang;LI Chenrui;WU Jianlong;WU Shengli;XU Jian(Technology Center,Shougang Jingtang United Iron and Steel Co.,Ltd.,Tangshan 063200,Hebei,China;Ironmaking Department,Shougang Jingtang United Iron and Steel Co.,Ltd.,Tangshan 063200,Hebei,China;College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China)

机构地区：[1]首钢京唐钢铁联合有限责任公司技术中心,河北唐山063200 [2]首钢京唐钢铁联合有限责任公司炼铁作业部,河北唐山063200 [3]重庆大学材料科学与工程学院,重庆400044

出　　处：《中国冶金》2025年第3期55-64,共10页China Metallurgy

基　　金：重庆市自然科学基金资助项目(CSTB2023NSCQ-MSX0514,CSTC2019JCYJ-MSXMX0089)。

摘　　要：并罐式无料钟高炉炉顶由于料罐的偏心布置,导致在布料过程中发生炉料颗粒偏析分布。虽然该偏析现象的量化表征与形成机理已被系统研究,但是由炉料颗粒连续运动所带来的偏析特征随布料时间与空间转变的规律却鲜有报道。为此,先建立大型并罐式无料钟高炉布料系统的三维数学模型,再采用离散单元法模拟和量化解析5种炉料颗粒依次在运输皮带、料罐和炉喉处的质量分布,进而归纳布料过程中多元炉料偏析特征的时空分布规律。研究结果表明,料罐内炉料颗粒的偏析主要受运输皮带上分布层级和布料时序的影响,时序最先的炉料倾向于堆积在料罐底部,料罐顶部则主要由布料时序最长的炉料所占据。从料罐的径向方向来看,位于运输皮带下层的炉料易集中在料罐中心区域,而上层的炉料更倾向于堆积在靠近料罐壁面的区域。在高炉炉喉处,炉料颗粒的偏析主要受布料操作的影响,而不直接受运输皮带上分布层级和布料时序的影响。然而,由于料罐内部的炉料颗粒偏析以及排料时各区域排出顺序的差异,炉料在炉喉处径向的混合均匀度分布存在显著差异。因此,运输皮带上炉料的分布时序和结构能够通过决定料罐内部的偏析来影响炉喉处炉料的质量分布,进而改善炉料结构并提升高炉的整体性能,这为高炉操作提供了新的优化方向。The eccentric arrangement of hoppers in the top of a bell-less blast furnace with parallel hoppers leads to the segregation of burden particles during the charging process.Although the quantitative characterization and formation mechanisms of this segregation have been systematically studied,the changes in segregation characteristics over time and space during the continuous movement of burden particles are rarely reported.Therefore,firstly,a 3D mathematical model of the charging system for a large bell-less blast furnace with parallel hoppers was established.Then,the discrete element method(DEM)was used to simulate and quantitatively analyze the mass distribution of multicomponent burden particles sequentially at the conveyor belt,hopper,and furnace throat.Subsequently,the spatiotemporal distribution of the segregation characteristics during the charging process was summarized.The results show that the segregation of burden particles within the hopper is mainly influenced by the layering on the conveyor belt and the charging sequence.Burden charged earlier tends to accumulate at the bottom of the hopper,while burden charged later predominantly occupies the top.Radially within the hopper,burden in the lower layers of the conveyor belt tends to concentrate in the central region of the hopper,while burden in the upper layers tends to accumulate near the hopper walls.At the furnace throat,the segregation of burden particles is mainly influenced by the charging operation rather than directly by the layering and timing on the conveyor belt.However,due to the segregation of burden particles within the hopper and the differences in discharge sequences from various regions,significant radial differences in the mixing uniformity distribution of burden at the furnace throat are observed.Therefore,the sequence and structure of the burden on the conveyor belt can affect the mass distribution of the charge at the throat by determining the segregation inside the hopper,thereby improving the charge structure and improving the o

关 键 词：高炉 布料 并罐式炉顶 颗粒偏析 时空分布 离散单元法 

分 类 号：TF5[冶金工程—钢铁冶金]