CAI Gaipin¹, RUAN Liao^1a, LI Yangbo^2,3

(1a. School of Mechanical and Electrical Engineering, 1b. Jiangxi Province Engineering Research Center for Mechanical and Electrical of Mining and Metallurgy, Jiangxi University of Science and Technology, Ganzhou 341000, China; 2. State Key Laboratory of Mineral Processing,BGRIMM Technology Group, Beijing 100160,China;3. BGRIMM Machinery &Automation Technology Co., Ltd., Beijing 100160, China)

Abstract：The laminating crushing efficiency of roll crusher can be effectively improved by controlling reasonable feeding grain size, but there are some problems in analyzing the crushing process, such as invisible material in the chamber and difficult to collect crushing data. In order to improve the crushing efficiency of roll crusher and optimize the analysis method of its crushing process, a co-simulation model was established by using discrete element method (DEM) and multibody dynamics (MBD). The crushing law of the material in process of laminating crushing of roll crusher was studied. The lamination crushing test of roll crusher was carried out. The influence of the inlet particle size with different porosity on the crushing efficiency was analyzed and the accuracy of the co-simulation model was verified. The results show that the crushing process of roller crusher consists of single particle crushing and lamination crushing. The crushing process is divided into three stages, compaction of material layer, crushing of material and agglomeration and discharge of material. In order to improve the crushing efficiency of roll crusher, it is necessary to control the feed particle size of not less than 40% of the roll gap. Under this condition, the crushing efficiency can be improved by mixing the ore with the feed particle size of 50%～100% to reduce the porosity. The DEM-MBD co-simulation is in good agreement with the particle size distribution curves of the experimental results, which verifies the reliability of the established co-simulation.

Keywords：roll crusher; discrete element method; laminate crush; damage accumulation; co-simulation

Get Citation：CAI G P, RUAN L, LI Y B. DEM-MBD co-simulation and experiment on laminating crushing process of roll crusher[J]. China Powder Science and Technology, 2023, 29(5): 92-100.

DOI：10.13732/j.issn.1008-5548.2023.05.011

Received：2022-12-10,Revised：2023-06-22,Online：2023-08-28 11：48。

Funding Project：江西省重点研发计划项目,编号:20181ACE50034。

First Author：蔡改贫(1964—),男,教授,博士,博士生导师,研究方向为智能矿山装备技术、智能监控与工业机器人等。E-mail:cgp4821@163.com。