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首页> 外文会议>International congress on the science and technology of ironmaking;ICSTI'09 >Analysis of Particle Size Segregation at Bell-less Top of Blast Furnace by Discrete Element Method
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Analysis of Particle Size Segregation at Bell-less Top of Blast Furnace by Discrete Element Method

机译：高炉无钟炉顶粒度分离的离散元分析

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摘要

The objective of this paper is to analyse the particle size segregation during charging at the bell-less type charging system of the blast furnace. The charging behavior of the sintered ore particle was simulated by using Discrete Element Method (DEM). The sintered ore particles (number of particles: nore=620231) were charged in the hopper, and the coke particles (ncoke=112712) were stacked at the top of blast furnace. The particles in the chute were pressed up against the chute wall with moving toward the outlet because of the centrifugal force of the chute rotation. The strong particle segregation was seen at the outlet; the most of smallest particles were upper area. It was found that the particle motion during flowing the chute was twisted in the simulation. The specific charged mass at charging area increases with increasing the number of charges, and the distribution of charged mass becomes widened toward the center of blast furnace, because the particles slide downward along with the slope of heap. Thus, DEM can give the particle size segregation during charging process of bell-less top in detail, and this is very informative tool for the optimization of charging process .
机译：本文的目的是分析高炉无钟型装料系统装料过程中的粒度偏析。使用离散元方法（DEM）模拟了烧结矿颗粒的带电行为。将已烧结的矿石颗粒（颗粒数量：nore = 620231）装入料斗，并将焦炭颗粒（ncoke = 112712）堆叠在高炉顶部。由于溜槽旋转的离心力，溜槽中的颗粒随着朝向出口移动而被压向溜槽壁。在出口处观察到强烈的颗粒偏析。最小的颗粒最多的是上部区域。结果发现，在模拟过程中，颗粒在溜槽中的运动是扭曲的。装料区域的特定装料质量随着装料数量的增加而增加，并且由于颗粒随着堆的倾斜而向下滑动，因此装料质量的分布朝向高炉中心变宽。因此，DEM可以在无钟罩顶部的装料过程中详细给出粒度分离，这对于优化装料过程是非常有用的工具。

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