竖冷炉内烧结矿运动行为的离散元模拟  

Flow behavior of sinter in shaft cooler with DEM simulation

作　　者：祁腾飞 黄军[2] 孙俊杰[3] 张永杰 QI Tengfei;HUANG Jun;SUN Junjie;ZHANG Yongjie(School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China;School of Energy and Environment,Inner Mongolia University of Science and Technology,Baotou 014010,Nei Mongol,China;Technology Center,Shanghai Meishan Iron and Steel Co.,Ltd.,Nanjing 210039,Jiangsu,China;Central Research Institute,Baosteel Co.,Ltd.,Shanghai 201900,China)

机构地区：[1]东北大学冶金学院,辽宁沈阳110819 [2]内蒙古科技大学能源与环境学院,内蒙古包头014010 [3]上海梅山钢铁股份有限公司技术中心,江苏南京210039 [4]宝钢股份有限公司中央研究院,上海201900

出　　处：《钢铁研究学报》2022年第3期239-247,共9页Journal of Iron and Steel Research

摘　　要：利用离散单元法研究烧结矿竖冷炉在排料过程中颗粒运动的流型和速度分布。模拟结果表明,烧结矿颗粒在下移过程中,运动流型依次呈“一”→“S”→“V”转变;在竖冷炉腔内的大部分区域,烧结矿颗粒保持整体流动;在中心风帽上方的局部区域(宽480 mm,高1 280 mm),运动流型会随排料的进行在整体流和漏斗流之间转变。烧结矿颗粒速度分布表明,在中心风帽上方会形成更大区域的(宽960 mm,高3 200~3 840 mm)梯形缓慢流动区。缓慢流动区内颗粒下移速度较小,冷却后的颗粒不能及时排出炉外,不利于气固换热效率的提高。应采取措施减小炉内缓慢流动区的范围,以提高竖冷炉内颗粒流动的整体性。The discrete element method was used to study the flow pattern and velocity distribution of sinter particles during the discharging process of shaft cooler.The simulation results showed that the flow pattern of sinter particles presented a transformation process of "one" → "S" → "V" successively.In most areas of vertical cooling furnace,sinter particles maintained mass flow.While in the local areas above the central air cap(480 mm wide and 1 280 mm high),flow pattern would change between mass flow and funnel flow with the discharge.The velocity distribution of sinter particles showed that a larger trapezoidal slow flow area(960 mm wide and 3 200-3 840 mm high) would be formed above the central air cap.The particles in the slow flow area move down slowly,and the cooled particles can not be discharged out of the furnace in time,which is not conducive to the improvement of gas-solid heat transfer efficiency.Measures should be taken to reduce the range of slow flow zone in the furnace to improve the degree of particle mass flow in the shaft cooler.

关 键 词：烧结矿 竖冷炉 流型 速度分布 离散单元法 

分 类 号：TF046[冶金工程—冶金物理化学]