弛张筛在红柳选煤厂的应用

Application of flip-flop screen in Hongliu coal preparation plant

介绍了弛张筛的工作原理,说明其具有维护量小、运行可靠、筛孔不易堵塞、适于难筛物料等特点。论述了伯特利弛张筛和宾得弛张筛的性质,并分别对其进行了工业化筛分试验,根据结果绘制各筛面分配曲线,对比了筛分效率和平均分配误差。结果表明:伯特利弛张筛的上层筛分效率为92.35%,高于宾得弛张筛的86.01%,筛分效果优于宾得弛张筛,而伯特利弛张筛的下层筛分效率仅为55.70%,低于宾得下层的76.53%,筛分效果不如宾得弛张筛;伯特利弛张筛的分配粒度均小于分级粒度,而宾得弛张筛的分配粒度均大于分级粒度;宾得弛张筛上下层筛板的平均分配误差均小于伯特利弛张筛。综合对比后说明宾得弛张筛在红柳选煤厂的应用效果更佳。

Introduce the principle of flip-flop screen. It has many advantages such as little maintenance amount, high reliability, free of blocking and great adaptability to near-size materials. Introduce the properties of Birtley Screen and Bivitee Screen, conduct the industrial screening test of these two kinds of flip-flop screens, and plot the distribution curves according to experimental results. Compare the screening efficiency and average distribution error. The results show that, the screening efficiency of upper sifter of Birtley Screen is 92.35 percent, while that of Bivitec Screen is 86. O1 percent. The screening efficiency of lower sifter of Birtley Screen is 55. 70 percent, while that of Bivitee Screen is 76.53 percent. The partition size of Birtley Screen is smaller than classification size,while that of Bivitee Screen is opposite. The average distribution error of both sifters of Birtley Screen is a little higher than that of Bivitec Screen. In general, the screening effects of Bivitec Screen is better in Hongliu coal preparation plant.