Screening is a separation process that classifies materials according to their particle size and is a key unit for mineral processing and utilization. Recently, vibrating flip-flow screens (VFFSs) characterized by large vibration intensity of the screen surface and high efficiency for sticky fine particles have been widely applied. Unlike the traditional vibrating screens, the VFFS is a two-body vibration system, including two vibrating bodies, comprising the main screen frame and a floating screen frame. In this paper, a single-deck type of 0827 VFFS excited by an exciter was designed and produced, and a five-degree-of-freedom translational and rotational dynamic model and equations reflecting the VFFS’s motion behavior were established. Then, the dynamic characteristics and spatial trajectories of the main and floating screen frame were investigated through the theoretical analysis and vibration testing. When the connecting stiffness between these two screen frames is very large, the two-body VFFS becomes a single-body circular vibrating screen (CVS). Through screening experiments on the CVS and VFFS, the screening behaviors of sticky fine materials were further studied. The results show a phenomenon of fine particles adhering to the screen surface in the process of screening the sticky fine materials with the CVS. In addition, due to the effects of adhesion and agglomeration, 3–1 mm and 1–0 mm particles cannot easily pass through the screen aperture. The screening efficiency is only 61.99 %, and the total misplaced materials is 9.82 % in the CVS. Compared with the CVS, due to the larger vibration intensity of the sieve mat in the VFFS, there are almost no adhered fine particles on the screen surface. Furthermore, the larger vibration acceleration of the screen surface can improve the desorption and depolymerization of fine particles. Therefore, the screening performance of the VFFS is significantly better than the CVS, with a screening efficiency of 77.62 % and total misplaced materials of 5.76 %.

筛分是一种按粒度对物料进行分类的分离过程，是选矿的关键单元和利用。近年来，以筛面振动强度大、粘性细颗粒筛分效率高为特点的振动翻转流筛（VFFSs）得到了广泛应用。与传统的振动筛不同，VFFS是一个两体振动系统，包括两个振动体，由主筛框和浮动筛框组成。本文设计并制作了激振器激励的单层0827型VFFS，建立了反映VFFS运动行为的五自由度平移和旋转动力学模型和方程。然后，通过理论分析和振动试验研究了主筛框和浮筛框的动态特性和空间轨迹。当这两个筛框之间的连接刚度很大时，两体VFFS就变成了单体圆振动筛（CVS）。通过CVS和VFFS的筛选实验，进一步研究了粘性精细材料的筛选行为。结果表明，在用CVS筛选粘性细物料的过程中，有细颗粒粘附在筛面上的现象。此外，由于粘附和团聚的影响，3-1 mm 和 1-0 mm 的颗粒不易通过筛孔。筛分效率仅为61.99%，CVS中总错位率为9.82%。与 CVS 相比，由于 VFFS 中筛垫的振动强度较大，筛面上几乎没有粘附的细颗粒。此外，细颗粒的解聚。因此，VFFS的筛选性能明显优于CVS，筛选效率为77.62%，总错位材料为5.76%。