Laboratory-scale validation of a DEM model of a toothed double-roll crusher and numerical studies

Yun Wang Li, La La Zhao, Er Yi Hu, Kang Kang Yang, Jing Feng He, Hai Shen Jiang, Qin Fu Hou

Research output: Contribution to journalArticleResearchpeer-review

2 Citations (Scopus)

Abstract

A discrete element method (DEM) model of the crushing process of a toothed double-roll crusher (TDRC) is established using the bonded particle model. DEM results and experimental data are compared quantitatively and a relatively good agreement is observed. The effects of rotation speed and structure of crushing rolls on the performance of TDRC are investigated numerically. The results show that when the rolls' speed is relatively high, the nipping condition would be improved, and more cracks could be created to release the increasing strain energy, generating more fractions of small sizes in the products. But, when rolls' speed exceeds 150 rpm, the crushing performance would not be significantly improved. A reasonable working gap and better nipping behaviour are obtained using the spiral-tooth-roll or the staggered-tooth-roll. The validated DEM model could be applied to gain a fundamental understanding of the crushing mechanisms of TDRC.

Original languageEnglish
Pages (from-to)60-72
Number of pages13
JournalPowder Technology
Volume356
DOIs
Publication statusPublished - 1 Nov 2019

Keywords

  • Bonded particle model
  • Crushing process
  • Discrete element method
  • Laboratory-scale validation
  • Toothed double-roll crusher

Cite this