Industrial electric heating furnaces – Plasma furnace device
Patent
1996-06-19
1998-09-22
Hoang, Tu B.
Industrial electric heating furnaces
Plasma furnace device
373 20, 373 78, 373 79, 266 45, 75582, H05B 700, F27D 300
Patent
active
058125868
ABSTRACT:
Slag from a pool of molten slag floating on molten metal in a plasma arc treatment chamber is removed by providing a slag container located inside the chamber which has a slag intake pipe extending from a bottom of the container downwardly into the slag pool. A vacuum line is connected to the top of the container and a vacuum source. When a vacuum is applied to the inside of the container, the pressure prevailing in the chamber pushes the slag from the pool through the intake pipe into the container. When the container becomes filled with molten slag, the latter enters a section of the line communicating the top of the container with the vacuum source. As the slag enters the pipe section, it is cooled and solidified to prevent further slag flow into or gas (air) flow through the vacuum line so that the container can be lifted out of the chamber while the slag in the container is still in its molten state without causing slag spillage.
REFERENCES:
patent: 3632096 (1972-01-01), Perry
patent: 3867132 (1975-02-01), Perry
patent: 5305990 (1994-04-01), Sherwood
patent: 5408494 (1995-04-01), Schlienger
Hoang Tu B.
Lockheed Martin Advanced Environmental Systems, Inc.
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