Characteristics analysis of a novel centralized-driving flip-flow screen

作     者：Peng Liping Li Fengming Dong Hailin Liu Chusheng Zhao Yuemin Duan Chenlong 

作者机构：School of Mechanical and Electrical EngineeringChina University of Mining & Technology Tangshan Research InstituteChina Coal Technology and Engineering Group Corp. School of Chemical Engineering and TechnologyChina University of Mining & Technology 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2014年第24卷第2期

页      面：195-200页

核心收录：

学科分类：081902[工学-矿物加工工程] 0819[工学-矿业工程] 08[工学] 

基　　金：The financial support from the National Natural Science Foundation of China (Nos. 51221462 and 51134022) the Doctoral Programs Foundation of Ministry of Education of China (No. 20120095110001) 

主　　题：Centralized driving Flip flow screen Fine and moist coal Kinematic characteristic Sieving capacity and efficiency 

摘      要：During screening operation, blinding or clogging of screen perforations generally occurs to reduce the sieving capacity and efficiency. Recently, the flip-flow screening has been widely recognized as a feasible method to deal with the problem. In this paper, a novel centralized-driving flip-flow screen(CFS) was developed for the separation of fine and moist coal, and the key structures, namely, a centralized-driving mechanism and a quasi-circle beam mounted with the mat were designed for high reliability and stability. By means of a test on an experimental prototype, the effect of some factors, i.e., initial stretch and hardness of the polyurethane panel, respectively, and the rotation speed of the driving motor on the kinematic characteristic of the screen surface was investigated. Results show that without an initial stretch, the sieve mat generates the largest vibratory amplitude while the slacker the sieve mat initially is, the smaller amplitude it will accomplish. And an increase in the rotation speed could cause a rise in the vibratory amplitude. Unlike the two factors, the hardness does not have a definite effect on the kinematic performance, on which a further study is required. Finally, screening processing on a laboratory prototype was conducted to draw the conclusion that the developed CFS also has a high sieving efficiency for the fine and moist coal.