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Patent Searching and Data


Title:
ELEVATED DISCHARGE GAS LIFT BUBBLE PUMP AND FURNACE FOR USE THEREWITH
Document Type and Number:
WIPO Patent Application WO2004074523
Kind Code:
A3
Abstract:
A metal melting closed furnace which includes a main chamber (22), a circulation well (28) connected to the main chamber (22) by a communications passageway (32) and a vortex well (84) having an exit outlet for molten metal into the main chamber (22). A cover (108) is emplaced over the vortex well (84). An inert gas bubble activated molten metal pump (46) is provided in which there is an entry port (48) in the circulation well (28) and exit port (64) into the vortex well (84). The exit port (64) is positioned to lie at least partially or entirely above the maximum level of molten metal in the vortex well (84). This exit port (64) will typically be at or near the top of the vortex well (84). In order to reduce oxidation, inert gas bubbles are captured from this molten metal pump (46) and creating an inert gas atmosphere or blanket above the molten metal vortex.

Inventors:
AREAUX LARRY D (US)
JACKSON EDWARD SCOTT (US)
Application Number:
PCT/US2004/004434
Publication Date:
November 03, 2005
Filing Date:
February 13, 2004
Export Citation:
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Assignee:
PREMELT SYSTEMS INC (US)
AREAUX LARRY D (US)
JACKSON EDWARD SCOTT (US)
International Classes:
B22D23/06; C21C5/56; C21C7/00; C21C7/072; C22B1/00; C22B7/00; C22B9/00; C22B9/16; C22B21/00; F27B3/04; F27B3/18; F27B17/00; F27D3/00; F27D3/08; F27D3/10; F27D3/14; F27D3/16; F27D27/00; C22B; (IPC1-7): C21C7/00
Foreign References:
US3932173A1976-01-13
US5211744A1993-05-18
US5984999A1999-11-16
US6068812A2000-05-30
Other References:
See also references of EP 1601802A4
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