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WO1998051826B1 - Apparatus for and method of treating liquid metal - Google Patents

Apparatus for and method of treating liquid metal

Info

Publication number
WO1998051826B1
WO1998051826B1 PCT/US1998/008591 US9808591W WO9851826B1 WO 1998051826 B1 WO1998051826 B1 WO 1998051826B1 US 9808591 W US9808591 W US 9808591W WO 9851826 B1 WO9851826 B1 WO 9851826B1
Authority
WO
WIPO (PCT)
Prior art keywords
vacuum
molten metal
chamber
offtake
treatment chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US1998/008591
Other languages
French (fr)
Other versions
WO1998051826A1 (en
Filing date
Publication date
Application filed filed Critical
Priority to AU73637/98A priority Critical patent/AU7363798A/en
Publication of WO1998051826A1 publication Critical patent/WO1998051826A1/en
Publication of WO1998051826B1 publication Critical patent/WO1998051826B1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Abstract

A method and apparatus (10) for degassing molten metal in a vacuum treatment chamber defined by an open topped ladle (22) containing the molten metal and a generally cylindrical refractory lined cover (34) having a closed top (38) and an open bottom (37) positioned on the ladle, with a temporary joint (70) formed therebetween, and a vacuum seal (50) sealing the vacuum treatment chamber from the atmosphere. A vacuum offtake (40) is connected to the cover chamber (35) to apply vacuum to the vacuum treatment chamber, and the molten metal is stirred to produce sufficient turbulence and splashing to produce an increased surface area of molten metal exposed to vacuum to accelerate the degassing rate. The offtake outlet (40) is located at a height above the cover chamber (35) open bottom to substantially prevent splashed metal and slag from being carried into the offtake (40) while permitting aggressive stirring to increase treatment rate.

Claims

AMENDED CLAIMS
[received by the International Bureau on 6 November 1998 (06.11.98); new claims 33-35 added; remaining claims unchanged (1 page)] chamber, said lance being operable to inject gas into said vacuum treatment chamber.
32 - The molten metal treating apparatus according to Claim 30 further comprising an alloy port in said cover chamber for the addition of alloy materials to molten metal in said vacuum treatment chamber.
33. The method according to claim 1 wherein the step of providing a temporary joint includes providing interfitting contoured surfaces on said cover chamber open bottom and said ladle open top.
34. The method according to Claim 33 wherein said contoured surfaces define a shiplap joint.
35. The molten metal treating apparatus according to Claim 17 wherein said joint means comprises interfitting contoured surfaces on said cover chamber open bottom and said ladle open top.
PCT/US1998/008591 1997-05-15 1998-05-12 Apparatus for and method of treating liquid metal Ceased WO1998051826A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU73637/98A AU7363798A (en) 1997-05-15 1998-05-12 Apparatus for and method of treating liquid metal

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US4658197P 1997-05-15 1997-05-15
US60/046,581 1997-05-15

Publications (2)

Publication Number Publication Date
WO1998051826A1 WO1998051826A1 (en) 1998-11-19
WO1998051826B1 true WO1998051826B1 (en) 1998-12-30

Family

ID=21944215

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/008591 Ceased WO1998051826A1 (en) 1997-05-15 1998-05-12 Apparatus for and method of treating liquid metal

Country Status (3)

Country Link
US (1) US5917115A (en)
AU (1) AU7363798A (en)
WO (1) WO1998051826A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6666902B1 (en) * 2000-05-12 2003-12-23 Nippon Steel Corporation Ladle refining apparatus and ladle refining method using it
US6902696B2 (en) * 2002-04-25 2005-06-07 Alcoa Inc. Overflow transfer furnace and control system for reduced oxide production in a casting furnace
EP1894649A1 (en) * 2006-09-01 2008-03-05 Stopinc Aktiengesellschaft Device for maintenance of a sliding gate mounted at the outlet of a metallutgical vessel
DE102006044837A1 (en) * 2006-09-22 2008-04-03 Siemens Ag Device for controlling an electric arc furnace
CN110373553B (en) * 2019-08-26 2021-03-23 东北大学 Device and method for preventing consumable electrode of electroslag furnace from oxidation

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US963652A (en) * 1909-12-13 1910-07-05 Alleyne Reynolds Manufacture of steel.
US1131488A (en) * 1912-10-22 1915-03-09 Eugen Dolensky Vacuum process for production of steel.
GB801518A (en) * 1956-01-17 1958-09-17 Hoerder Huettenunion Ag An improved process and apparatus for de-gasifying molten metal
LU34978A1 (en) * 1956-03-16
US2893860A (en) * 1957-02-21 1959-07-07 Heraeus Gmbh W C Method and apparatus for continuously degassing molten metals, particularly steel, by evacuation
US3201226A (en) * 1957-02-27 1965-08-17 Ruhrstahl Huttenwerke Ag Steel purification vacuum method
US2993780A (en) * 1957-11-16 1961-07-25 Siderurgie Fse Inst Rech Method for treating steel in vacuo
US3099699A (en) * 1959-09-08 1963-07-30 Heraeus Gmbh W C Apparatus for degassing molten steel
US3501289A (en) * 1965-06-09 1970-03-17 Finkl & Sons Co Method and apparatus for adding heat to molten metal under vacuum
US3826646A (en) * 1969-10-13 1974-07-30 G Karlsson Method for treating melts and means for carrying out this treatment
DE1965136B1 (en) * 1969-12-27 1971-02-25 Standard Messo Duisburg Device for ladle degassing of steel or other metal melts
CA1179142A (en) * 1981-10-28 1984-12-11 Ralph Harris Vacuum purification of liquid metal
US5603749A (en) * 1995-03-07 1997-02-18 Bethlehem Steel Corporation Apparatus and method for vacuum treating molten steel

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