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Progress in Plasma Processing of Materials, 1999

ISBN:
1-56700-126-2 (Print)

GENERALIZED WORKING CHARACTERISTICS OF VORTEX D.C. PLASMA TORCH WITH VARIABLE GEOMETRY

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

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

Abstract

For ultrafine powder processing 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÷90 kW, anode shield-insert diameter in the range 20÷30 mm with angle of divergent part Θ=0÷30°.