单振源共振式筛筛孔尺寸对工艺效果影响实验研究

Experimental Study on the Influence of the Size of the Screen Hole on the Technological Effect of Single Vibration Source Resonance Screen

为研究单振源共振筛筛孔尺寸对工艺效果的影响,在单振源共振筛实验系统中筛孔尺寸分别取0.074、0.1、0.12、0.15、0.2、0.3 mm,处理量分别取2、4、6、8、12、14、16、18、20 t/(m^(2)·h),测定入料细度(-0.074 mm)、筛下细度(-0.074 mm)及筛上细度(-0.074 mm),并计算出筛下产率、筛分效率等相关指标,研究结果表明,随着处理量的逐渐增大,筛下细度(-0.074 mm)基本保持恒定,筛上细度(-0.074 mm)逐渐增大,筛下产率与筛分效率均逐渐减小。同时在筛孔尺寸为0.045~0.15 mm,随着筛孔尺寸的逐渐变大,处理量快速增大,当筛孔达到0.2 mm以后,处理量逐渐趋于平缓,且筛分效率为75%时,处理量可达到8.8~19.3 t/(m^(2)·h)。

In order to study the influence of the mesh size of single vibration source resonance screen on the process effect,the mesh size is 0.074,0.1,0.12,0.15,0.2 and 0.3 mm respectively in the single source resonance screen test system,and the processing capacity is 2,4,6,8,12,14,16,18 and 20 t/m^(2)·h.respectively,the fineness of feed(-0.074 mm),the fineness under screen(-0.074 mm)and the fineness above screen(-0.074 mm)were measured,and the relevant indexes such as the yield under screen and the screening efficiency were calculated.The results showed that with the increase of throughput,the fineness under screen(-0.074 mm)remained constant basically,the fineness above screen(-0.074 mm)increased gradually,the yield under screen and the screening efficiency decreased gradually.At the same time,when the mesh size is 0.045~0.15 mm,with the gradual increase of mesh size,the t throughput increases rapidly.When the mesh size reaches 0.2 mm,the throughput gradually tends to be flat,and the screening efficiency is 75%,the treatment capacity can reach 8.8~19.3 t/(m^(2)·h).