振动参数对筛分效率影响的实验研究

选用经过干燥的硅粉、钼粉和锌粉物料作为典型物料研究对象，通过实验研究振动参数对颗粒筛分效率的影响.首先，研究振动频率、偏心块夹角、料层厚度、不同物料性质对普通旋振筛筛分效率的影响，得出典型物料在普通旋振筛作用下的最佳振动参数;然后进行超声波振动实验，实验表明，超声波振动能够有效打散细粉物料颗粒团聚体，解决筛孔堵塞问题，显著提高了筛分效率.根据实验结果可以获得硅粉物料颗粒在普通振动和超声波振动综合作用下的最佳组合参数.

Experimental Study on Influence of Vibration Parameters on Screening Efficiency

The effects of vibration parameters on particle screening efficiency were studied by using dried silicon powder， molybdenum powder and zinc powder as typical materials. Firstly， the effects of vibration frequency， angle of eccentric block， thickness of material layer and different material properties on the screening efficiency of common rotary vibrating screen were investigated， and the optimal vibration parameters of typical materials under the action of common rotary vibrating screen were obtained. Then， the ultrasonic vibration experiment was carried out. The experiment shows that the ultrasonic vibration could effectively disperse the particle aggregates of the fine powder materials， solve the problem of the screen hole blockage， thus improving the screening efficiency significantly. According to the experimental results， the optimum combination parameters of silicon powder particles under the combined action of ordinary vibration and ultrasonic vibration can be obtained.