中文摘要：

利用射流原理将气体引入到水介质旋流器中，考查了射流器喷嘴直径对水介质旋流器充气性能和细粒煤分选的影响。试验结果表明：当啧嘴直径在4～6mm之间、旋流器筒体直径在75mm以内时，可以得到可调范围较宽的气液比；旋流器筒体内气液比在25％左右时，随着喷嘴直径的增大，各粒级溢流灰分逐渐降低，溢流回收率和底流灰分在喷嘴直径为5mm时最高；＋0．125mm粒级的分选效率在喷嘴直径为5mm时最高。由此可以确定与直径为75mm旋流器相适应的最佳射流器的喷嘴直径为5mm。

英文摘要：

The jet principle was introduced into a water-only cyclone, and the influence ofjetter nozzle diameter on the aeration and separation performance of the water-only cyclone for fine coal separation. Test results showed： at the nozzle diameter ranging from 4 to 6 mm and the cyclone cylinder diameter being within 75 ram, the ratio of gas to liquid with wide adjustment range was obtained; at the ratio of gas to liquid in cyclone cylinder being about 25%, overflow ash content of each size fraction decreased gradually with the increase in nozzle diameter, and the overflow recovery and underflow ash content were maximum at the nozzle diameter being 5 rain; the separation efficiency of＋0.125mm size fraction was maximum at the nozzle diameter being 5 mm. According to above results, the optimal jetter nozzle diameter suitable for the cyclone with diameter of 75 mm was determined as 5 mm.