Numerical simulation model for granulation kinetics of iron ores based on discrete element method

Junya Kano, Eiki Kasai, Fumio Saito, Takazo Kawaguchi

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

A numerical simulation model was developed to analyze the granulation kinetics by using the Discrete Element Method (DEM). The experiment of granulation was performed to understand the actual granulation behavior of iron ore particles. The granulation rate goes up with a decrease in a particles charge ratio and with an increase in a rotational speed of a drum mixer in the experiment. The granulation could be consisted of two processes: One is "a growing process" and the other is "a breaking process". The former would be related to the rotation of granules and the latter would be dependent on the impact, which granules receive from others and/or a drum mixer wall. Then the rotational kinetic energy and the impact energy of a granule were calculated by using the DEM simulation. A granulation energy composed of both the impact energy and the rotational kinetic energy was proposed for analyzing the granulation kinetics. It increases as the rotational speed of the drum mixer rises and as the granule charge ratio drops. The granulation energy would be correlated with the actual granulation process. When the drum mixer diameter becomes large, the granulation energy decreases. When the drum mixer is leaned, the granulation energy becomes larger than at the lean of 0 degrees. That is, the drum mixer has a possibility to improve a granulation process. When the drum mixer is leaned further, the granulation energy rapidly decreases at the lean of 60 degrees. This means that the optimum leaning angle must exist.

Original languageEnglish
Pages (from-to)742-747
Number of pages6
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume92
Issue number12
DOIs
Publication statusPublished - 2006

Keywords

  • Breaking process
  • DEM
  • Drum mixer
  • Granulation
  • Growing process
  • Impact energy
  • Iron ore
  • Rotational kinetic energy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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