英国煤炭研究和开发公司新近研制出了一种旋转式筛分机。这种筛分机可用于潮湿原煤的筛分作业。可筛原煤的最大粒度约为100毫米。根据所筛原煤中含煤粉的粒度和数量,可以调节旋转筛盘的转速,从而控制筛下品的质量和数量比(参看图)。 British coal research and development company recently developed a rotary screen machine. This screening machine can be used for wet raw coal screening operations. Sieve coal can be the largest particle size of about 100 mm. Depending on the size and amount of pulverized coal in the sifted raw coal, the speed of the rotating sieve tray can be adjusted to control the quality and quantity ratio of the rejects (see the figure).