摘要：针对直接还原铁回转筒式冷却机雾化喷嘴最佳布设区域设计问题，采用二维离散有限元方法，建立回转筒式冷却机断面还原铁球团运动模型，分析回转筒体在不同转速、填充率、物料粒径和导料板数量下，还原铁球团在断面的运动规律和动态休止角，并依据回转筒式冷却机内部平板型导料板的分布，求取还原铁球团与筒体的接触区域，为雾化喷嘴最佳布设区域设计提供设计参考。结果表明：筒式冷却机内颗粒物料在稳定运 动阶段作滚落运动；提高筒体转速会使得颗粒物料的休止角增大；增加导料板和增大物料粒径可以改善颗粒物料在筒体内的运动状态；物料填充率的变化对实验结果影响不明显。 

关键词：筒式冷却机；离散元法；运动模拟；数值仿真

Abstract：This paper establish the reduced iron pellets motion model by using 2D DEM for the optimum region design of atomizing nozzle in the section of a rotary drum. The current paper investigates the motion of particles and the dynamic angle of repose with different rotational speeds，filling degrees， different particles size scales and different number of lifting plate，and measure the region between particles and rotating drum according to the distribution of flat lifting plates，which provide the design reference for the optimum region design of atomizing nozzle. The results illustrate that the motion mode of particles is rolling motion in steady motion period in rotating drum. Improving the rotational speed will increase the angle of repose of particles and increasing the lifting plate and particle size will improve the motion of particles in rotating drum. However the filling degrees have little effect on the results. 

Keywords: drum cooler；discrete element method；kinematic simulation；numerical analysis