烧结球团在变径回转窑中的运动过程模拟  

Simulating oxidized pellets movement in diameter-varied rotary kiln

作　　者：王建辉[1] 彭俊[1] 谭帅[1] 方晓柯[1] 

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110004

出　　处：《华中科技大学学报（自然科学版）》2013年第11期17-21,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：中央高校基本科研业务费专项资金资助项目(N100404017;N120304004);中国博士后科学基金资助项目(2013M530937);辽宁省工业攻关计划资助项目(2010220014)

摘　　要：针对球团矿链篦机-回转窑系统中考虑回转窑烧结固化过程结圈产生的变径,通过软件模拟出窑内温度分布情况,并由温度分布函数得出结圈物的情况,进而得出回转窑的变径函数,并对窑内球团流进行定量的受力分析,计算物料在变径情况下的动态休止角.结合物料运动特性,指出在结圈作用下,为了使球团处于滚落状态而均匀受热,回转窑转速不得低于0.5r/min.将变径函数和变径作用下动态休止角的轴向变化代入改进的料层厚度计算公式,分段计算出不同给料速率下的料层厚度分布,模拟出回转窑在固衡定转速下的料层厚度曲线,得出球团平均停留时间,计算结果与现场实际数据一致.By considering the ringing forming, the radius varying function was obtained through the temperature distribution simulated by the Fluent software. The ring material situation was derived from the temperature distribution ruction, and the kiln＇s ruction was got. With the force analysis of pellets, the dynamic angle of repose could be calculated. The result shows that the rotating speed should be more than 0.5 r/min in order to make the pellets in rolling status during the indurations combined with the movement of materials properties. The function varying radius and the correspond- ing dynamic angle of repose were substituted into the improved calculation of height of pellets to ob- tain the height of pellets in each sub-kiln. The curve of the height of pellets in different feed rate was well simulated the real pellets movement and the mean residence time （MRT） was also close to the da- ta of rotarv kiln t）roeos~

关 键 词：回转窑 结圈作用 变径 燃烧模拟 平均停留时间 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]