Analysis of abrasion mechanism of grinding media in a planetary mill with DEM simulation

Akira Sato, Junya Kano, Fumio Saito

Research output: Contribution to journalArticlepeer-review

48 Citations (Scopus)

Abstract

In order to investigate the abrasion phenomena in a planetary ball mill, we conducted the grinding operation without a powder and sought a correlation between the ball abrasion and the ball impact energy estimated by a Discrete Element Method (DEM) simulation. Experimental results showed that the mass of abraded balls increased in proportion to the grinding time in the early stage of grinding up to 75 min. The abrasion rate increases quadratically with the mill rotation speed. It decreases with an increase in ball diameter up to 12.7 mm and then slightly increases when the diameter is 15.8 mm. It also increases with an increase in the ball-filling ratio of the mill up to 50%. Similar tendencies are found in the impact energy calculated from the balls motion simulated by DEM. Therefore, it is said that the abrasion rate has a strong correlation to the impact energy of balls under any milling conditions.

Original languageEnglish
Pages (from-to)212-216
Number of pages5
JournalAdvanced Powder Technology
Volume21
Issue number2
DOIs
Publication statusPublished - 2010 Mar

Keywords

  • Abrasion powder
  • Abrasion rate constant
  • Discrete element method
  • Impact energy
  • Planetary ball mill

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Mechanics of Materials

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