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竖式冷却回收烧结矿显热是烧结过程余热资源高效回收利用的一项新技术。以中冶东方设计的冷却竖炉为原型,按照等比例缩小建立了三维的几何模型,采用离散单元方法(DEM)对炉内烧结矿颗粒的运动行为进行了模拟研究。模拟结果显示:顶部的“人”字形入料口导致烧结矿粒度的炉内偏析,使炉内孔隙率分布表现为边缘大,中间小,左边大,右边小的规律;对底部排料来说,使用多排料口同时排料或者周期很短的间歇式排料,会使烧结矿在炉内下降的速度较均匀。
Recovering the sensible heat of sinter by vertical cooling is a new technology of efficient recovery and utilization of residual heat resources in sintering process. Taking the cooling shaft furnace designed by MCC as the prototype, a three-dimensional geometric model was established according to the scaling-down method. The motion behavior of sinter particles in the furnace was simulated by the discrete element method (DEM). The simulation results show that the “” shape entrance at the top of the furnace leads to the segregation in the furnace and the porosity distribution in the furnace is characterized by large edge, small middle, large left and small right; In the meantime, the use of multiple discharge openings at the same time or intermittent discharge of short intervals, will make sinter in the furnace down more evenly.