The present study investigated the influence of high proportions of pellet feed (two different particle sizes) on the cold agglomeration behaviour of a sinter mixture and the properties of the granules. Using high proportions of adherent particles (pellet feed) lead to a decrease in the mixtures’ mean diameter, producing wider size distributions with higher contents of granules below 1 mm. The bed permeability was impaired for higher additions of pellet feed, which correlated with the alterations of granules size distribution. Degradation tests so simulate handling and transported sharply affected granules size distribution and permeability, showing that larger granules are more susceptible to degradation. Moreover, both the ratio and the size distribution of the pellet feed were found to influence the granulation mechanism to different extents. Using finer adherent particles at adherents/nuclei ratios bigger than 50% changed the agglomeration mechanism from layering towards a combination of coalescence and layering.

本研究调查了高比例的颗粒饲料（两种不同粒径）对烧结混合物的冷团聚行为和颗粒性能的影响。使用高比例的粘附颗粒（颗粒饲料）会导致混合物的平均直径减小，从而产生更宽的尺寸分布，且颗粒含量低于1 mm的颗粒含量更高。较高的颗粒饲料添加会损害床的渗透性，这与颗粒尺寸分布的变化有关。降解测试可模拟处理和运输对颗粒尺寸分布和渗透性有明显影响的颗粒，表明较大的颗粒更易于降解。此外，发现颗粒饲料的比例和粒度分布都在不同程度上影响造粒机理。