A pair of the inner segmentation (IS) rings is inserted in a rotating drum. The effects of the location and size of the rings on the axial and radial segregation patterns are studied. When the IS ring pair locates outside the end wall shearing zone of 10 particle diameter, the ring shearing independently affects the local mixing. The rings concentrate the larger particles at the bed periphery and smaller particles in the core, increasing the band number and degree of mixing. The drum mixing index monotonically increases with the ring width. There exists a critical IS ring width causing a 2-h long-term segregation pattern changing. The critical ring width in a 40% fill drum is ca. 30 particle diameter, covering 52% of the transverse bed area.

一对内分段 (IS) 环插入旋转鼓中。研究了环的位置和尺寸对轴向和径向偏析模式的影响。当IS环对位于10粒径的端壁剪切区之外时，环剪切独立影响局部混合。这些环将较大的颗粒集中在床的外围，将较小的颗粒集中在核心，从而增加了带的数量和混合程度。转鼓混合指数随环宽度单调增加。存在导致 2 小时长期偏析模式变化的临界 IS 环宽度。40% 填充鼓中的临界环宽度约为。30粒径，覆盖横向床面积的52%。