布料方式对竖冷炉内烧结矿偏析及气流分布的影响

为优化梅钢竖冷炉的布料方式，采用离散单元法和多孔介质模型研究中间布料和边缘-中心布料对炉内烧结矿的偏析、空隙率分布、气流分布以及气体压力的影响.结果表明，对比中间布料，采用边缘-中心布料时，大颗粒偏析区域由中心区和上部边壁区变为中间区，且烧结矿偏析得到改善.床层空隙率虽有下降，但沿宽度方向分布更均匀.中间布料条件下，气体流速主要呈沿边壁区向中心区逐渐增大的分布，且气体压力较小.边缘-中心布料时，气体流速呈中间区较大、中心区和边壁区较小的“Λ”型分布，但上述区域间的流速差值减小.气体压力增幅较大，但能够沿高度方向同步下降.综合上述因素，推荐使用边缘-中心布料.

Effect of Charging Mode on Sinter Segregation and Gas Flow Distribution in Vertical Cooling Furnace

The discrete element method and porous medium model are used to study the effects of intermediate distribution and edge-center distribution on sinter segregation， voidage distribution， gas flow distribution and gas pressure in Meigang vertical cooling furnace， so as to optimize its distribution mode. The results show that compared with the intermediate distribution， using edge-center distribution， the large particle segregation area changes from the central area and the upper sidewall area to the middle area， and the sinter segregation is improved. Although the bed voidage decreases， it is more evenly distributed along the width direction. Under the condition of intermediate distribution， the gas velocity increases gradually from the sidewall area to the central area， and the gas pressure is small. In the edge-center distribution， the gas velocity shows a “Λ” type distribution where it is larger in the middle area， smaller in the center area and the sidewall area， whereas the velocity difference between the above areas decreases. The gas pressure increases greatly， while it can decrease synchronously along the height direction. Based on the above factors， the edge-center distribution is recommended.