The role of transport phenomena in the plasma synthesis of fine particles: The production of silicon powder

Dilawari, A. H.; Szekely, J.

doi:10.1007/bf02825605

Cited by 7 publications

(4 citation statements)

References 19 publications

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“…A complete mathematical model of such a process would allow the rapid estimation of the effects of the operating parameters and the optimization of the reactor. Models in the literature have considered the gas-phase kinetics of a plasma reactor in a two-dimensional field, for various reaction systems: SiCl 4 (McKelliget and El-Kaddah 1990), SiCl 4 -H 2 (Coudert et al 1982, Zhao et al 1990, Ar-Ar + -e − (Ramshaw and Chang 1992), SiH 4 (Dilawari and Szekely 1989), Ar-H 2 -CH 4 (Kolman et al 1996) and SF 6 (Gleizes et al 1993).…”

Section: Introductionmentioning

confidence: 99%

Modelling of the reactive synthesis of ultra-fine powders in a thermal plasma reactor

Désilets

Bilodeau²,

Proulx

1997

J. Phys. D: Appl. Phys.

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A two-dimensional, chemical kinetics and aerosol growth model is developed for the comprehensive simulation of the reactive synthesis of ultra-fine particles in a thermal plasma reactor. The model solves the velocity and temperature fields that are coupled to the equations describing the electromagnetic induction field. Conservation equations for the plasma species consider the multi-component diffusion and chemical reactions. For the condensable product, an additional term is introduced, due to the phase change. Particle growth occurs via homogeneous nucleation and surface condensation, and an evaporation term is considered for concentrations below saturation. The model is applied to the synthesis of silicon metal powders by the dissociation of . The effect of the input power and that of the radial quenching are investigated by comparison with a simulation base case.

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Section: Introductionmentioning

confidence: 99%

Modelling of the reactive synthesis of ultra-fine powders in a thermal plasma reactor

Désilets

Bilodeau²,

Proulx

1997

J. Phys. D: Appl. Phys.

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“…Vago and Smith 11 however, investigated experimentally the conditions necessary to produce such erosion. A mathematical analysis of the flow distribution inside an electroslag furnace was performed by Szekely et al, 12,13 whereas studies by Austin, 14 Trier, 15 and Carling 16 concentrated on flow patterns in glass furnaces. While these analyses determine the flow and temperature patterns inside the system, they do not determine the possible relationship between surface tension and erosion rate of the refractory wall.…”

Section: Introductionmentioning

confidence: 99%

The contribution of surface tension driven flows in flux line erosion

Tsotridis

1997

Journal of Applied Physics

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“…The slag and the ingot are contained in a water cooled copper mould. As also the baseplate is water cooled, a heat flow regime is imposed that leads to controlled solidification, and by that, to an improved microstructure ofESR ingots [1][2][3][4][5][6].…”

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confidence: 99%

On the Importance of Electric Currents Flowing directly into the Mould during an ESR Process

Kharicha

Schützenhöfer

Ludwig

et al. 2008

steel research international

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In the present paper a numerical model is developed to predict the exact electric current paths in the slag region of an Electro‐Slag‐Remelting (ESR) process. The model solves the momentum and energy equations. The solidification of the slag at the mould is modelled with an enthalpy‐porosity approach. The magnitude of the Joule heating and the Lorentz force are derived from the computed electric current lines. The localization where the Joule heating occurs controls the temperature distribution. The electric current distribution is in turn influenced by the temperature field through the temperature dependant electric conductivity. With this numerical tool the electric current paths are exactly computed by choosing the less resistive way to the liquid pool, or to the mould. For a given electric intensity the model predicts the power generated by the system and the solidified slag thickness at the mould. The model is validated by comparing its results with experiments on a small scale ESR process with high current density.

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The role of transport phenomena in the plasma synthesis of fine particles: The production of silicon powder

Cited by 7 publications

References 19 publications

Modelling of the reactive synthesis of ultra-fine powders in a thermal plasma reactor

Modelling of the reactive synthesis of ultra-fine powders in a thermal plasma reactor

The contribution of surface tension driven flows in flux line erosion

On the Importance of Electric Currents Flowing directly into the Mould during an ESR Process

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