颗粒形状和旋转溜槽结构对高炉布料颗粒动力学行为的影响  

Effect of particle shape and rotating chute geometry on the particle dynamic behaviour in blast furnace burden distribution process

作　　者：王俊青 刘思达 徐进 周宗彦 WANG Junqing;LIU Sida;XU Jin;ZHOU Zongyan(Jiangxi Provincial Key Laboratory for Simulation and Modelling of Particulate Systems,Nanchang 330013,China;International Innovation Research Institute,Jiangxi University of Science and Technology,Nanchang 330013,China)

机构地区：[1]江西省颗粒系统仿真与模拟重点实验室,江西南昌330013 [2]江西理工大学国际创新研究院,江西南昌330013

出　　处：《中国有色冶金》2024年第5期141-157,共17页China Nonferrous Metallurgy

基　　金：国家自然科学基金面上项目(52276154);江西省教育厅科学技术项目(GJJ2200855,GJJ2200815)。

摘　　要：旋转溜槽是高炉布料系统的重要部件,通过改变溜槽角度和转速可以影响物料在溜槽出口端的速度和分布,从而影响炉料的下落轨迹。本文以旋转溜槽作为研究对象,采用离散单元法对物料流动进行模拟仿真,分析了溜槽设计、角度以及颗粒种类和形状对炉料颗粒下落轨迹、溜槽出口端位置颗粒的尺寸分布和速度分布以及颗粒偏析的影响。计算结果表明:溜槽下料过程中不可避免地会出现颗粒偏析情况;溜槽角度对布料过程的影响显著,角度越大料流越稳定;炉料粒径越大,颗粒形状对下料过程的影响越明显;方形溜槽能够有效地聚拢下料过程中的料流宽度,从而达到精准布料的效果;耐磨衬板的加入在一定程度上也能达到精准布料的效果。The rotating chute is an important component of the blast furnace burden distribution system.It can affect the speed and distribution of burden materials at the chute tip by changing chute angle and rotating speed,hence further impact the falling trajectory.In this work,we use the discrete element method to study the behavior of burden materials under different conditions including varying the chute structure,chute angle,and particle shape.The results demonstrate that the segregation can occur during the chute distribution process,and the chute angle of the chute has a great influence on the burden distribution.The larger the angle,the more stable the material flow;the larger the particle size,the greater the influence of the particle shape.The square shaped chute can effectively decease the width of the material flow,thereby achieving the effect of precise distribution.The addition of wear⁃resistant lining plates can also achieve the precise distribution to a certain extent.

关 键 词：高炉布料 旋转溜槽 颗粒轨迹 颗粒偏析 离散单元法 

分 类 号：TF543.3[冶金工程—钢铁冶金] TF537