A Numerical Study of Plasma-Particle Heat Transfer Dynamics in Induction Thermal Plasmas for Glassification

Authors

  • M. Mofazzal Hossain,

    Non-member
    1. Department of Electronics and Communications Engineering, East West University, 43 Mohakhali C/A, Dhaka-1212, Bangladesh
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  • Yaochun Yao,

    Non-member
    1. National Engineering Lab of Vacuum Metallurgy, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
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  • Takayuki Watanabe

    Non-member, Corresponding author
    1. Department of Environmental Chemistry and Engineering, Tokyo Institute of Technology, G1-22, 4259 Nagatsuta, Yokohama 226-8502, Japan
    • Department of Environmental Chemistry and Engineering, Tokyo Institute of Technology, G1-22, 4259 Nagatsuta, Yokohama 226-8502, Japan.
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Abstract

Dependence of energy exchange between plasma and soda-lime-silica glass particles on the particle size, powder feed-rate and nozzle insertion length during in-flight thermal treatment for glassification by induction thermal plasmas has been studied. For the numerical investigation into the plasma-particle energy exchange dynamics during melting and vaporization of particles, a thermofluid plasma-particle interaction model has been developed taking into account the strong plasma-particle interactions and particle loading effects. It is found that heat transfer to the particles depends strongly on the particles' size, powder feed-rate, nozzle insertion length, and plasma discharge parameters. Thus, for the efficient thermal treatment of particles, the above parameters should be optimized. © 2009 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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