基于离散元的烧结梭式布料仿真

Simulation of sintering shuttle distribution based on discrete element method

烧结梭式布料对烧结台车宽度方向上混合料的均匀分布起着重要作用,根据某钢铁企业烧结机梭式布料器的实际尺寸建立了三维模型,使用EDEM软件对带前挡板的梭式布料器的布料过程进行了仿真模拟。结果表明:梭式布料器前挡板角度为90°,梭式布料器在料仓两侧的停留时间应当尽量一致,当停留时间均为7 s时,料面形状较平整,宽度方向上不同尺寸的颗粒在不同区域的质量分数标准差最低达到0.001,但颗粒在料仓两侧的质量差异较大,有可能造成烧结物料分布不均;梭式布料器前挡板的角度为60°时,颗粒在不同区域的质量分数标准差为0.006,料面形状的平整度最高,且最小粒度的颗粒在料仓两端所占比例最高,可以有效减小"气流边缘效应",提高烧结均匀性。

Sintering shuttle distribution plays an important role in the uniform distribution along the width direction of sintering trolley.A three-dimensional model was established according to the actual size of shuttle distributor of sintering machine in an iron and steel enterprise,and the shuttle distribution process with front baffle was simulated by EDEM software.The results show that when the angle of the front baffle of the shuttle distributor is 90°,the residence time of the shuttle distributor on both sides of the silo should be the same as possible.When the residence time is 7 s,the shape of the material surface is flat,and the particles mass fraction standard deviation in different areas is 0.001.However,the difference of the mass fraction of the particles on both edges of the silo is still large,which may lead to the uneven distribution of materials.When the angle of the baffle in the front of the shuttle distributor is 60°,the particles mass fraction standard deviation in different regions is 0.006,the flatness of the material surface is the highest,and the proportion of the smallest particle at both ends of the silo is the largest,which could effectively reduce the"edge airflow effect"and improve the sintering uniformity.