Quantitative Characterization of Mixing of Dry Powders in V-Blenders

Dean Brone, Albert Alexander, F. J. Muzzio

Research output: Contribution to journalArticle

99 Scopus citations

Abstract

Experiments were conducted to determine the effect of rotation rate, fill level, and total number of revolutions on the mixing performance of a V-blender. The experiments were performed using 66- μm red and green glass beads. Mixture uniformity was quantified after each experiment by infiltrating the mixtures with a binder, and using image analysis to examine slices of the solidified mixture. The mixing rate (as a function of total revolutions) was not affected by changing the rotation rate between 8 and 24 rpm. The mixing rate increased significantly as the fill percentage was decreased from 60 % to 40% of the total vessel volume. In a symmetric blender such as a V-blender, the rate of mixing is limited by the rate of mass transfer across the vessel plane of symmetry orthogonal to the axis of rotation, A one-parameter model based on the amount of material that crossed the plane of symmetry per revolution displayed good agreement with the experimental data.

Original languageEnglish (US)
Pages (from-to)271-278
Number of pages8
JournalAIChE Journal
Volume44
Issue number2
DOIs
StatePublished - Jan 1 1998

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Environmental Engineering
  • Chemical Engineering(all)

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