Plasma torch and an apparatus for producing fused silica using p

Details Plasma torch and an apparatus for producing fused silica using p Plasma torch and an apparatus for producing fused silica using p

1993-07-20

1994-12-27

Paschall, Mark H.

Electric heating

Metal heating

By arc

21912137, 21912148, 21912152, 373 18, 373 19, B23K 1000

Patent

active

053767675

ABSTRACT:
An apparatus for producing fused silica includes at least one anodic plasma arc electrode and at least one cathodic plasma arc electrode adjustably arranged with respect to one another so that the plasma arcs formed thereby couple together to form a plasma arc coupling zone. A feedstock material is fed into a region between the electrodes or to a region near the electrodes where the plasma arc coupling zone is formed. A platform is located beneath the plasma arc coupling zone to receive the silica product which is formed in the plasma arc coupling zone. The platform may be rotated about its axis and move up and down along its axis. A cooling device also may be included with the platform. The plasma anode torch used in the apparatus includes a cylindrical nozzle with a non-consumable, copper, blunt ended electrode disposed therein. A channel is provided between the electrode and the nozzle wall to allow the plasma gas to pass through the torch.

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