Plasma spray torch with hot anode and gas shroud

Details Plasma spray torch with hot anode and gas shroud Plasma spray torch with hot anode and gas shroud

1991-05-03

1993-06-15

Paschall, Mark H.

Electric heating

Metal heating

By arc

21912148, 2191215, 21912152, B33K 900

Patent

active

052201503

ABSTRACT:
A gas shrouded plasma torch utilizes a hot anode that has an inert gas passing around the periphery of the anode to provide an inert gas shroud for a plasma stream exiting from the anode. The gas shroud is heated as it passes around the exterior of the hot anode, and when it exits from the passageway and forms a shroud, it mixes with and shields the hot plasma. The arrangement gives the results of less turbulence of the plasma flow, while retaining a high temperature which aids in particle processing.

REFERENCES:
patent: 3470347 (1969-09-01), Jackson
patent: 4121082 (1978-10-01), Harrington et al.
patent: 4369919 (1983-01-01), Beloev et al.
patent: 4656330 (1987-04-01), Poole
patent: 4682005 (1987-07-01), Marhic
patent: 4762977 (1988-08-01), Browning
patent: 4777343 (1988-10-01), Goodwin
patent: 4841114 (1989-06-01), Browning
patent: 4851636 (1989-07-01), Sugimoto et al.
patent: 4902871 (1990-02-01), Sanders et al.
Article entitled "A Gas-Shrouded Plasma Spray Torch" by Fleck et al., Proceeding of the 7th International Symposium on Plasma Chemistry, vol. 4, p. 1113 (1985).

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