Estimation of extraction rate of yttrium from fluorescent powder by ball milling

Hiroshi Mio, Jaeryeong Lee, Takao Nakagawa, Junya Kano, Fumio Saito

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

Red fluorescent powder containing yttrium (Y) which is one of the rare earth elements (REEs), was milled in air using a small scale planetary ball mill to investigate the relation between the extraction rate of Y and the impact energy of the balls calculated from computer simulation based on the Discrete Element Method (DEM) under various conditions. Milling improves the extraction yield, and extraction rate increases with an increase in mill rotational speed, whereas the rate is independent of ball diameter. The same trend is observed in the relation between the specific normal impact energy of the bails and rotational speed. The relation between the extraction rate and the specific normal impact energy can be expressed as a straight line, irrespective of the milling conditions, and it is applicable to estimation of the extraction rate using a large-scale planetary ball mill. Therefore, the extraction rate of Y would be estimated by the specific normal impact energy of the balls calculated from the computer simulation.

Original languageEnglish
Pages (from-to)2460-2464
Number of pages5
JournalMaterials Transactions
Volume42
Issue number11
DOIs
Publication statusPublished - 2001 Nov

Keywords

  • Discrete Element Method
  • Extraction rate
  • Impact energy
  • Mechanical milling
  • Rare earth elements
  • Yttrium

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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