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Reduction of Selected Metal Oxides in a Thermal Plasma Produced by a Nontransferred ARC Torch

  • Brent A. Detering (a1), James A. Batdorf (a2) and Chien M. Wai (a1)

Abstract

Plasma flow field temperatures are determined in a nontransferred arc plasma using emission spectroscopy. This technique is then utilized to identify thermal decomposition and reduction products produced in the plasma plume when metal oxide particles are injected into the plasma arc. The processed particles are then studied using AAS, SEM, EDS and XRD to characterize the chemical changes that have occurred in the particles. A Fourier transform method is used to study changes in particle morphology.

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1. Camacho, S. L., Eschenbach, R. C., and Feinman, J., “Assessment of Development Problems and Future Prospects,” Plasma Technology in Metallurgical Processing, Feinman, J., ed., Warrendale: Iron and Steel Society, Inc., 1987.
2. MacRae, D. R., “Application of Plasma Technology to Ferroalloy Processing,” Plasma Technology in Metallurgical Processing, Feinman, J., ed., Warrendale: Iron and Steel Society, Inc., 1987.
3. Reid, K. J. and Camacho, S. L., “Historical Review,” Plasma Technology in Metallurgical Processing, Feinman, J., ed., Warrendale: Iron and Steel Society, Inc., 1987.
4. Torch operating conditions were chosen to give maximum power input to the plasma with minimum electrode wear.
5. OMA III, Model 1460-GID, Optical Multichannel Analyzer, EG&G Princeton Applied Research, Princeton, NJ.
6. Detering, B.A., PhD thesis, University of Idaho, 1987.
7. Boulos, M., Fauchais, P., and Pfender, E., “Diagnostic Techniques in Thermal Plasma Processing”, U.S. Department of Energy, Office of Energy Research, Office of Basic Energy Sciences, Washington, D.C., February 1986, DOE/ER-0270, pp 190–195.

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Reduction of Selected Metal Oxides in a Thermal Plasma Produced by a Nontransferred ARC Torch

  • Brent A. Detering (a1), James A. Batdorf (a2) and Chien M. Wai (a1)

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