Effect of particle penetration depth on solid/liquid mass transfer rate by particle blowing technique

Takahiro Okuno, Azhar Uddin, Yoshiei Katou, Sang Beom Lee, Yong Hwan Kim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this study, cold model experiments on particle blowing were carried out to clarify the effect of particle penetration depth on solid/liquid mass transfer rate. A comparison of penetration depth obtained by experiment and CFD calculation using commercially available software was also carried out. The penetration depth was measured by a visual observation whereas the solid/liquid mass transfer rate was obtained from the ion-exchanged reaction between Na+ on pearlite particles and H + in HCl aqueous solution. Both of the penetration depth and solid/liquid mass transfer rate increased with the increase in particle feed rate and top blowing gas flow rate, and the decrease in lance height and particle diameter. The following non-dimensional equation of particle penetration depth was obtained by several non-dimensional numbers: (equation presented) where, ReP : particle Reynolds number, Fr: Froude number, We: Weber number, p1 and ppliquid and particle densities (kg/m3), respectively. A good agreement was confirmed by the experiment. The particlepenetration depth was also calculated by a combination of VOF and DEM model and it was in good agreement with the experiment. The solid/liquid mass transfer coefficient calculated by the CFD simulation and Froessling equation increased with the increase in top blowing gas flow rate, particle feed rate and penetration depth. The solid/liquid interfacial area was expressed by a function of penetration depth.

Original languageEnglish
Pages (from-to)1902-1910
Number of pages9
JournalISIJ International
Volume57
Issue number11
DOIs
Publication statusPublished - Jan 1 2017

Keywords

  • Particle blowing
  • Penetration depth
  • Powder blowing
  • Solid/liquid mass transfer

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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