The main merits and demerits of three types of dry coal preparation facilities is discussed and it is proved that stroke adjustment, wastage of energy,height of machine should be improved.

• 介绍了我国研制或引进的三种干法选煤设备的主要优缺点,综合分析认为,冲程调节,设备高度降低,分选效果及生产能力等都与激振器有关;