(19)
(11) EP 0 515 975 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
12.05.1993 Bulletin 1993/19

(43) Date of publication A2:
02.12.1992 Bulletin 1992/49

(21) Application number: 92108547.8

(22) Date of filing: 20.05.1992
(51) International Patent Classification (IPC)5: H05H 1/34, H05H 1/28
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 29.05.1991 CA 2043504

(71) Applicant: NORANDA INC.
Toronto Ontario, M5L 1B6 (CA)

(72) Inventors:
  • Tsantrizos, Peter G.
    Ville St-Pierre, Quebec H8R 1J3 (CA)
  • Lachance, Raynald
    Pincourt, Quebec J7V 6N6 (CA)
  • Henshaw, Bruce
    Rigaud, Quebec J0P 1P0 (CA)
  • Mavropoulos, Lakis T.
    Montréal, Quebec H3T 1J7 (CA)

(74) Representative: Müller-Boré & Partner Patentanwälte 
Grafinger Strasse 2
81671 München
81671 München (DE)


(56) References cited: : 
   
       


    (54) High enthalpy plasma torch


    (57) A plasma torch comprises a torch housing, rear and front tubular electrodes coaxially mounted within such housing with a gap therebetween, both electrodes being fabricated from copper having tubular inserts of refractory material, a vortex generator for introducing a tangential flow of gas in opposite direction into the tubular electrodes through the gap between the two electrodes, and a cooling system for cooling the tubular electrodes.






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