无料钟并罐装料过程的离散单元模拟  

A discrete element method modeling for charging process in a bell-less top with two parallel hoppers

作　　者：邱廷省[1] 吴紧钢 邱小平[1] 王利民[2] 

机构地区：[1]江西理工大学资源与环境工程学院,江西赣州341000 [2]中国科学院过程工程研究所多相复杂系统国家重点实验室,北京100190

出　　处：《计算机与应用化学》2015年第5期527-533,共7页Computers and Applied Chemistry

基　　金：国家自然科学基金(91434113);国家重点基础研究发展计划(2015CB251402);中国科学院战略先导科技专项(XDA07080303);国防科技创新基金(CXJJ-14-Z72)

摘　　要：采用离散单元法(DEM)对高炉并罐式无料钟装料装置中颗粒的装料行为进行了数值模拟研究。由于皮带及入料口的特殊结构导致了左右料罐料层形状的不对称,本工作通过添加内构件来减弱左右两料罐间料层形状的不对称性,并定量分析了加入内构件前后两罐间料层分布的不对称程度。数值结果表明:颗粒在内构件的作用下,受到的惯性作用减弱,颗粒经导料挡板加入左右料罐时的落点位置偏离减小,从而使颗粒在两料罐料层整体分布接近对称,有效减弱了料层分布不对称程度。The particle charging behaviors of the two-parallel hoppers in a blast furnace with a bell-less top were investigated using the discrete element method. There exists an asymmetric shape of material layers between the two parallel hoppers due to both the special structure of the belt and the feed inlet. To reduce the asymmetry of distribution, an inner member was added above the feed inlet, and the coefficient of asymmetry of different particle layers between the two parallel hoopers were analyzed quantitatively. The simulation results show that the effect of the particles＇ inertia is weakened by the inner member; the deviation of placement location on the feed baffle is decreased when the particles are charged into hoppers by the feed baffle, so that the overall distribution of the material layers is nearly symmetrical between the two hoppers and the asymmetry of distribution reduces effectively.

关 键 词：高炉 装料 离散单元法 内构件 分布不对称性 

分 类 号：TF542.5[冶金工程—钢铁冶金]