提高球团矿配比对高炉布料的影响及其优化研究  

Effect of increasing pellet ratio on blast furnace burden distribution and its optimization research

作　　者：宁泽尧 张晓辉 王楠 NING Zeyao;ZHANG Xiaohui;WANG Nan(School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China)

机构地区：[1]东北大学冶金学院,辽宁沈阳110819

出　　处：《烧结球团》2025年第1期95-102,共8页Sintering and Pelletizing

摘　　要：含铁炉料结构直接影响着高炉布料料层孔隙度,进而影响煤气流合理分布,探究球团矿配比对料层分布的影响及改善层间界面效应至关重要。本研究采用离散单元法对2550 m^(3)高炉的炉顶区域进行了三维建模,研究了存在焦炭层时提高球团矿配比对炉料料面形状的影响规律,并对矿焦层间界面效应提出了优化方案。结果表明,随球团矿质量配比的提高,炉料颗粒在溜槽末端的速度与落点半径增大,料流更加分散;随溜槽倾角增大,溜槽有效长度增加,炉料落点半径大幅增大;提高含铁炉料中球团配比,使得含铁炉料在径向上向炉喉中心滚动,而在纵向上整体高度降低,矿焦界面渗流现象严重。因此,增加球团矿配比时,为保证炉喉处初始料面稳定的形状,应使矿石布料角度增大,以减缓含铁炉料向炉喉中心的滚动。The structure of the iron-bearing charge directly affects the porosity and void ratio of the material layer of the blast furnace burden distribution,and then affects the reasonable distribution of coal gas flow,so it is very important to explore the influence of pellet ratio on the distribution of the material layer and improve the interlayer interface effect.In this study,the discrete element method is used to model the roof area of the 2550 m^(3)blast furnace in 3D,and the influence of increasing the pellet ratio on the shape of the charge surface in the presence of coke layer is studied,and an optimization scheme is proposed for the interface effect between the coke layers.The results show that with the increase of pellet mass ratio,the velocity and landing radius of the charge particles at the end of the chute increase,and the fuel flow is more dispersed.With the increase of the chute inclination,the effective length of the chute increases,and the landing radius of the charge increases significantly.Increasing the proportion of pellets in the ferrous charge makes the iron-containing charge roll towards the center of the throat in the radial direction,the overall height decreases in the longitudinal direction,and the seepage phenomenon at the coke interface is serious.Therefore,when increasing the pellet ratio,in order to ensure the stable shape of the initial material surface at the throat,the angle of ore distribution should be increased to slow down the rolling of the iron-containing charge to the center of the throat.

关 键 词：球团矿配比 料面形状 料流轨迹 界面效应 离散单元法 

分 类 号：TF046.6[冶金工程—冶金物理化学] TF51TF542