Abstract: A series of experiments were carried out to explore the characteristics and mixing mechanism of oil shale grains groups with diameter of 0～12mm in rotary kiln. Influences of rotation speed，vessel filling percentage and lifting flight forms on mixing efficiency were analyzed. Results showed that the particle group movement traces and mixing process was significantly affacted by the vessel filling percentage，the rotation speed and the lifting flight forms. With the increase of filling rate，the particle size was easily to produce separate effects；however，with the decrease in speed，the mixing of particle size with rectangular lifting flight was better than that of straight lifting flight.

摘要： 采用0～12mm油页岩颗粒群，研究回转干馏炉的填充率、转速、抄板形式等对油页岩不同粒度颗粒混合运动特征，探明其在回转干馏炉内运动形态及混合机理。研究结果表明：填充率、转速及抄板形式对颗粒群运动和混合过程有重要影响；混合机理方面，对流、扩散、剪切对混合过程均有一定的作用，但对流起主要作用；随着填充率增大，颗粒群易产生分离效应；转速降低时，采用直角抄板比直抄板颗粒群混合程度好。