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Advances in Materials Science and Engineering
Volume 2017, Article ID 3405432, 11 pages
Research Article

Effect of the Lifting Velocity and Container Shape on Angle of Repose of Iron Ore Particles

Tongqing Li,1,2,3 Yuxing Peng,1,2,3 Zhencai Zhu,1,2,3 Zhangfa Yu,4 and Zixin Yin1,2,3

1School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, China
2Jiangsu Key Laboratory of Mine Mechanical and Electrical Equipment, China University of Mining and Technology, Xuzhou 221116, China
3Jiangsu Collaborative Innovation Center of Intelligent Mining Equipment, Xuzhou, China
4State Key Laboratory of Mining Heavy Equipment, CITIC Heavy Industries Co., Ltd., Luoyang 471000, China

Correspondence should be addressed to Yuxing Peng; moc.621@tmucgnixuygnep

Received 25 May 2017; Revised 6 September 2017; Accepted 28 September 2017; Published 23 October 2017

Academic Editor: Alain Portavoce

Copyright © 2017 Tongqing Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


To investigate the impact of lifting velocity and container shape on angle of repose, the fixed-base cylinder method was performed using three types of container shape. The container shape was lifted a series of lifting velocities. Six size fractions of iron ore particles ranging from coarser to fine particles were used as the test materials. And the sand-pile calibration method was then used to calibrate the contact parameters of iron ore particles. Results show angle of repose decreased exponentially with the lifting velocity, while it appeared approximately to be invariant to particle shape, for all size fractions. The sand pile highly depends on the container shape at a low lifting velocity but appears to be invariant to particle size for a high lifting velocity. And then a predictive equation is established and a very close agreement between the predicted and measured angle of repose is attained. Finally, a series of DEM simulations considering the irregular particle shape are conducted by means of sphere clump method to calibrate the contact parameters and are in good visual agreement with the experimental results, indicating the “tuned” contact parameters as well as the applicability of the predicted equation.