Industrial electric heating furnaces – Arc furnace device – Charging or discharging
Patent
1994-12-19
1996-08-06
Hoang, Tu
Industrial electric heating furnaces
Arc furnace device
Charging or discharging
373 72, 373115, F27D 300
Patent
active
055441955
ABSTRACT:
A high-bandwidth continuous-flow arc furnace for stream welding applications includes a metal mass contained in a crucible having an orifice. A power source charges an electrode for generating an arc between the electrode and the mass. The arc heats the metal mass to a molten state. A pressurized gas source propels the molten metal mass through the crucible orifice in a continuous stream. As the metal is ejected, a metal feeder replenishes the molten metal bath. A control system regulates the electrode current, shielding gas pressure, and metal source to provide a continuous flow of molten metal at the crucible orifice. Independent control over the electrode current and shield gas pressure decouples the metal flow temperature and the molten metal flow rate, improving control over resultant weld characteristics.
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Hardt David E.
Lee Steven G.
Hoang Tu
Massachusetts Institute of Technology
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