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为研究布料操作对竖炉内颗粒、空隙率及气流分布的影响,基于离散单元法(DEM)建立挡板布料器三维模型,分别计算分析不同挡板角度和料线高度下颗粒分布及空隙率分布,并评估其对气流分布的影响。结果表明,颗粒分布情况无法直接反应空隙率分布。当挡板角度为80°时,空隙率分布最均匀。料线高度对空隙率及颗粒分布的影响小于挡板角度的影响,随着料线高度增加,空隙率更均匀,但颗粒分布变化很小。当挡板角度为75°和80°时,有利于控制心部气流,而当挡板角度为82.5°和85°时,有助防止边部气流过度发展。适当增大料线高度,可使气流分布更均匀。
In order to study the effect of the cloth operation on the particle, voidage and air flow distribution in the shaft furnace, a three-dimensional model of the baffle distributor was established based on the discrete element method (DEM). The particle distribution and voidage at different baffle angles and line heights were calculated and analyzed respectively. Distribution, and to assess its impact on the distribution of air flow. The results show that the particle distribution can not directly reflect the porosity distribution. When the baffle angle is 80 °, the porosity distribution is the most uniform. The effect of material height on void fraction and particle distribution is less than that of baffle angle. With the increase of material line height, the void fraction is more uniform, but the particle distribution changes little. When the baffle angle of 75 ° and 80 °, it is conducive to the control of heart airflow, and when the baffle angle of 82.5 ° and 85 °, to help prevent the excessive development of the edge of the air flow. Appropriate to increase the height of the wire, the air flow can be more evenly distributed.