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<p>Screening experiments on friable materials have shown that significant crushing occurs in the rotary vibrating screen; however, many studies have not fully accounted for its impact on screening efficiency. This study investigates kaolin as a research subject to elucidate how material crushing influences screening efficiency. First, the bonded particle model within the discrete element method was employed to generate kaolin particle clusters, simulating their crushing behavior during the sieving process. The vibration frequency and amplitude were optimized through simulation experiments, revealing that a frequency of 13&#xa0;Hz and an amplitude of 3&#xa0;mm achieved the optimal balance between screening efficiency and material breakage. Comparative experiments demonstrated that incorporating ultrasonic vibration markedly enhanced screening efficiency. Vibration intensity was further analyzed to validate the accuracy of the selected parameter combination. Finally, physical experiments confirmed the accuracy of the simulation results, demonstrating that moderate crushing positively contributes to overall screening efficiency. This study elucidates the crushing mechanism of friable materials in rotary vibrating screens, providing a scientific basis for optimizing high-efficiency screening processes.</p>

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The influence of material crushing on screening rate during the screening process based on the DEM-BPM model

  • 期刊论文

  • 发表日期：

    2025年3月21日

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  • GuoLang Shen,
  • ZuQuan Xu,
  • Feng Dong,
  • XingGuo Wang,
  • Gong Chen,
  • GangTao Zhang

摘要

Screening experiments on friable materials have shown that significant crushing occurs in the rotary vibrating screen; however, many studies have not fully accounted for its impact on screening efficiency. This study investigates kaolin as a research subject to elucidate how material crushing influences screening efficiency. First, the bonded particle model within the discrete element method was employed to generate kaolin particle clusters, simulating their crushing behavior during the sieving process. The vibration frequency and amplitude were optimized through simulation experiments, revealing that a frequency of 13 Hz and an amplitude of 3 mm achieved the optimal balance between screening efficiency and material breakage. Comparative experiments demonstrated that incorporating ultrasonic vibration markedly enhanced screening efficiency. Vibration intensity was further analyzed to validate the accuracy of the selected parameter combination. Finally, physical experiments confirmed the accuracy of the simulation results, demonstrating that moderate crushing positively contributes to overall screening efficiency. This study elucidates the crushing mechanism of friable materials in rotary vibrating screens, providing a scientific basis for optimizing high-efficiency screening processes.