HUANG Long¹, QIAO Jinpeng¹, DONG Liang¹, JIANG Haishen², ZHAO Yuemin¹, DUAN Chenlong¹

(1. School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou 221116, China;2. State Key Laboratory of Mineral Processing Science and Technology, Beijing Mining and Metallurgical Technology Group Co., Ltd; Beijing 100160, China)

Abstract: The DEM method is applied to conduct numerical simulation of variable amplitude equal thickness screening process, the influence of parameters such as excitation frequency, amplitude difference and feeding speed on the screening performance of variable amplitude and equal thickness is analyzed. The results show that the variable amplitude equal thickness screening has obvious advantages than amplitude screening. When the excitation frequency is 16 Hz, the amplitude difference is 0.2 mm, and the feeding speed is 0.5 kg/s, the variable amplitude equal thickness screening shows the best performance, the screening efficiency is 83.72%.

Keywords: equal thickness screening; variable amplitude; screening efficiency; motion characteristics; discrete element method

中图分类号：TQ051.8

文献标志码：A

收稿日期： 2018-09-10，修回日期：2018-12-21，在线出版时间：2019-01-10 11:04。

基金项目：国家自然科学基金项目，编号：U1508210；矿物加工科学与技术国家重点实验室开放研究基金专项，编号：BGRIMM-KJSKL-2017-10。

第一作者简介：黄龙(1994—)，男，硕士研究生，研究方向为煤炭的高效深度筛分。E-mail：hlong23@126.com。

通信作者简介：赵跃民(1961—)，男，博士，教授，博士生导师，研究方向为煤炭的干法分选。E-mail：ymzhao_paper@126.com。

文章编号：1008-5548(2019)02-0025-06

DOI:10.13732/j.issn.1008-5548.2019.02.005