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Progress in Plasma Processing of Materials, 1997

ISBN:
1-56700-093-2 (Print)

GEOMETRIC PARAMETERS INFLUENCE ON VORTEX D.C. PLASMA TORCH WORKING CHARACTERISTICS

Pavle B. Pavlovic
The VINCA Institute of Nuclear Sciences, Laboratory for Thermal Engineering and Energy, P. O. Box 52211001 Belgrade, Yugoslavia

Predrag Lj. Stefanovic
Institute of Nuclear Sciences "Vinca", Laboratory for Thermal Engineering and Energy, Mike Petrovica-Alasa 12-14, PO Box 522,11001 Belgrade, Yugoslavia

S.Dj. Sikmanovic
Institute of nuclear sciences "Vinca"- Laboratory for Thermal Engineering and Energy Research, 11001 Belgrade, P.O.Box 522, Yugoslavia

Dejan B. Cvetinovic
Institute of Nuclear Sciences "Vinca", Laboratory for Thermal Engineering and Energy, Mike Petrovica-Alasa 12-14, PO Box 522,11001 Belgrade, Yugoslavia

Abstract

For special technological needs: ultrafine powder processing, coal and other materials plasma chemical treatment, the linear D.C. plasma torch with arc stabilization by swirling gas flow and additionally by magnetic field, has been investigated. Paper presents the mass, electric and energy parameters, experimentally obtained, with and without anode-shield insert. In those experiments plasma gas was nitrogen, mass flow rate 2,8−7 g/s, plasma torch electrical power was in the range of 15 to 90 kW, anode shield-insert diameter in the range 20−30 mm with angle of divergent part θ=0−30°.