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Title:
METHOD AND APPARATUS FOR OPTIMIZED MIXING IN A COMMON HEARTH IN PLASMA FURNACE
Document Type and Number:
WIPO Patent Application WO2005025774
Kind Code:
A3
Abstract:
A method and apparatus for optimized mixing in a common hearth in a plasma furnace. The apparatus provides a main hearth, a plurality of optional refining hearths, and a plurality of casting molds or direct molds whereby the refining hearths and molds define at least two separate ingot making lines. A feed chute provides raw material to the main hearth, whereby the feed chute is moveable to optimize its position during operation of the main hearth. Most particularly, the feed chute is moveable to provide better mixing, minimize skull build-up, and optimally place it opposite the overflow in use.

Inventors:
JACKSON EDWARD S
WARREN DAVID O
Application Number:
PCT/US2003/029235
Publication Date:
June 30, 2005
Filing Date:
September 19, 2003
Export Citation:
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Assignee:
LECTROTHERM INC (US)
International Classes:
B22D11/11; C21C5/52; C22B7/00; C22B9/22; F27B3/04; F27B3/08; F27B3/18; F27B3/19; F27B3/20; F27B14/02; F27B14/04; F27B14/06; F27B14/14; F27D3/00; F27D3/06; F27D3/10; C22B4/00; (IPC1-7): C21C7/00
Foreign References:
US5311655A1994-05-17
US4794979A1989-01-03
Other References:
See also references of EP 1567680A4
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