US3610600A - Continuously operable plant for degassing and pouring metal melts - Google Patents

Continuously operable plant for degassing and pouring metal melts Download PDF

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Publication number
US3610600A
US3610600A US783990A US3610600DA US3610600A US 3610600 A US3610600 A US 3610600A US 783990 A US783990 A US 783990A US 3610600D A US3610600D A US 3610600DA US 3610600 A US3610600 A US 3610600A
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US
United States
Prior art keywords
vacuum
vacuum chamber
downgate
conveyor trough
melt
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.)
Expired - Lifetime
Application number
US783990A
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English (en)
Inventor
Friedrich Schnake
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Elotherm GmbH
Original Assignee
AEG Elotherm GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19681583857 external-priority patent/DE1583857A1/de
Application filed by AEG Elotherm GmbH filed Critical AEG Elotherm GmbH
Application granted granted Critical
Publication of US3610600A publication Critical patent/US3610600A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/04—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated adapted for treating the charge in vacuum or special atmosphere

Definitions

  • a wellknown procedure For improving the physical properties of metals a wellknown procedure consists of melting them in a vacuum and in drawing off the volatile substances that are driven out of the melting metal.
  • the solid metal is first placed into a crucible inside a vacuum chamber and then melted, preferably by induction heating. When all the solid metal in the crucible has been melted down, it is degassed by evacuation of the vacuum chamber and then poured into ladles or the like.
  • the invention proposes to provide the crucible for the reception of the liquid melt with a transfer passage for delivering the liquid metal into an electromagnetic conveyor trough of which the lip is connected to a pouring spout, and to provide the pouring spout as well as the conveyor trough with a vacuum tight cover to fonn the vacuum chamber.
  • FIG. 1 shows a first embodiment of a continuously operable degassing and casting plant according to the invention
  • FIG. 2 shows a second embodiment of a continuously operable degassing and casting plant according to the invention.
  • FIG. 1 An embodiment of the proposed vacuum plant is shown in longitudinal section in FIG. 1 of the accompanying drawings, wherein 1 is a crucible which is filled with a metal melt 2.
  • the lip 8 at the end of the conveyor trough 7 is connected to a pouring spout 9 which may be provided with a closure 10 for pouring the liquid metal when required.
  • the pouring spout 9 as well as the conveyor trough 7 including the lip 8 are surrounded by a vacuumtight cover 11 which thus forms a vacuum chamber 12 for degassing the molten metal.
  • an inductor 13 preferably a three-phase inductor, is attached to the floorplate 14 of the conveyor trough 7 and connected to the electrical I mains.
  • the metal melt 2 which has already been molten, preferably in an induction furnace, enters the crucible 1, it also flows through the transfer passage 6 into the vacuum chamber 12 which between the ascending part of the conveyor trough and the lining 15 of the cover 11 it fills to a level that differs from that in the crucible 1 because of the vacuum pressure maintained in the vacuum chamber 12.
  • voltage is applied from the three phases of the main not shown to the inductor 13. The electromagnetic forces acting on the melt 2 operate to convey the melt up the conveyor trough 7, lifting it over the lip 8 into the closed pouring spout 9 which is thus filled.
  • the air in the vacuum chamber 12 is evacuated by a vacuum pump, not shown, generating a vacuum pressure inside the vacuum chamber 12 which causes the liquid metal to be degassed by the removal therefrom of volatile constituents, and the quality of the melt thereby to be improved.
  • the sliding gate 10 which serves as a closure in the pouring spout 9, is opened and the degassed melt 2 can be teemed for instance into chill moulds, casting moulds or the like.
  • the melt 2 which is yet to be degassed in the vacuum chamber 12 is conveyed up the conveyor trough into the pouring spout 9 at a rate which depends upon the adjustable voltage applied to the inductor. According to the quantity of metal that is poured the surface of the bath falls, both in the conveyor trough portion 7 and in the crucible 1. However, in order to maintain continuity in the process of degassing the melt 2 and of pouring the same, that is to say in order to carry out the degassing and pouring processes continuously without interruption the crucible 1 is refilled!
  • a feedhead l6 and a downgate 17 leading to the bottom of the vacuum chamber 12 as shown in FIG. 2 might be used. How ever, if this is done it is advisable to make good the unavoidable temperature loss which occurs during the introduction of the metal melt from the induction funnace into the feedhead 16, by surrounding the downgate 17 with a cylindrical induc tion coil or trough-shaped inductor 18 for reheating the melt 2.
  • a continuously operable vacuum plant for degassing and pouring metal melts comprising a crucible for the reception of the metal melt, a vacuum chamber and a transfer passage which joins the bottom of said crucible to the bottom of said vacuum chamber, for transferring metal melt from said crucible to said vacuum chamber, said vacuum chamber including a pouring spout, an open, upwardly inclined electromagnetic conveyor trough with an inductor arranged under the full length thereof, said conveyor trough communicating at its lowermost end with said crucible and having a lip at its uppermost end connected to said pouring spout, a vacuumtight cover surrounding said electromagnetic conveyor trough and pouring spout and means for providing a vacuum withinsaid vacuumtight cover said crucible, said transfer passage and said vacuum chamber having such dimensions that when said vacuum-producing means is operating and said inductor is not operating a level of metal melt is drawn into said vacuum chamber through said transfer passage which is lower than the upper end of said electromagnetic conveyor trough so that when said inductor is
  • a continuously operable vacuum plant for degassing and pouring metal melts comprising a feed head, a downgate from said feed head, a vacuum chamber and a transfer passage which joins the bottom of said downgate to the bottom of said vacuum chamber, for transferring metal melt from said downgate to said vacuum chamber, said vacuum chamber including a pouring spout, an open, upwardly inclined electromagnetic conveyor trough with an inductor arranged under the full length thereof, said conveyor trough communicating at its lowermost end with said crucible and having a lip at its uppermost end connected to said pouring spout, a vacuumtight cover surrounding said electromagnetic conveyor trough and pouring spout and means for providing a vacuum within said vacuumtight cover said feed head and downgate, said transfer passage and said vacuum chamber having such dimensions that when said vacuumproducing means is operating and said inductor is not operating a level of metal melt is 3.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
US783990A 1968-02-15 1968-12-16 Continuously operable plant for degassing and pouring metal melts Expired - Lifetime US3610600A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681583857 DE1583857A1 (de) 1968-02-15 1968-02-15 Im kontinuierlichen Betrieb arbeitende Vakuumanlage zum Entgasen und Abgiessen schmelzfluessiger Metalle

Publications (1)

Publication Number Publication Date
US3610600A true US3610600A (en) 1971-10-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
US783990A Expired - Lifetime US3610600A (en) 1968-02-15 1968-12-16 Continuously operable plant for degassing and pouring metal melts

Country Status (4)

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US (1) US3610600A (en, 2012)
JP (1) JPS501442B1 (en, 2012)
FR (1) FR1599072A (en, 2012)
GB (1) GB1181500A (en, 2012)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3765798A (en) * 1971-06-23 1973-10-16 Aeg Elotherm Gmbh Electromagnetic conveyor trough for conveying liquid metals
US3837531A (en) * 1972-02-14 1974-09-24 Modern Equipment Co Method for pouring liquid metal using electromagnetic pump
US3883045A (en) * 1972-09-30 1975-05-13 Aeg Elotherm Gmbh Electronic conveyor for molten metal with elevated pouring tube
US3961778A (en) * 1973-05-30 1976-06-08 Groupement Pour Les Activites Atomiques Et Avancees Installation for the treating of a molten metal
US4004902A (en) * 1974-01-25 1977-01-25 Nikolaus Sorg G.M.B.H. & Co. Method of dyeing and treating glass streams
US4146158A (en) * 1976-07-14 1979-03-27 Modern Equipment Company Apparatus for the quantitatively measurable casting of a molten metal with an electromagnetic dosing trough
US5058865A (en) * 1989-07-26 1991-10-22 British Steel Plc Liquid metal processing
US5316563A (en) * 1992-01-20 1994-05-31 Asahi Glass Company Ltd. Vacuum degassing method and its apparatus
US20030015000A1 (en) * 2001-07-18 2003-01-23 Hayes James C. Method for controlling foam production in reduced pressure fining
US20050160769A1 (en) * 2001-09-28 2005-07-28 Asahi Glass Company Limited Vacuum degassing apparatus for molten glass
CN113443824A (zh) * 2021-06-21 2021-09-28 中国原子能科学研究院 退火装置及熔融系统

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2054922A (en) * 1933-10-12 1936-09-22 American Smelting Refining Vacuum treatment of metals
US2140607A (en) * 1935-10-19 1938-12-20 American Metal Co Ltd Method of and apparatus for casting deoxidized copper
US2734240A (en) * 1956-02-14 Vacuum pouring apparatus
DE1198071B (de) * 1964-06-19 1965-08-05 Bbc Brown Boveri & Cie Vorrichtung zum Umwaelzen und Homogenisieren fluessiger Metalle
US3212767A (en) * 1958-11-24 1965-10-19 Hutteuwerk Salzgitter Ag Process and apparatus for degassing of fluid metals
US3310850A (en) * 1963-12-13 1967-03-28 Rheinstahl Huettenwerke Ag Method and apparatus for degassing and casting metals in a vacuum

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2734240A (en) * 1956-02-14 Vacuum pouring apparatus
US2054922A (en) * 1933-10-12 1936-09-22 American Smelting Refining Vacuum treatment of metals
US2140607A (en) * 1935-10-19 1938-12-20 American Metal Co Ltd Method of and apparatus for casting deoxidized copper
US3212767A (en) * 1958-11-24 1965-10-19 Hutteuwerk Salzgitter Ag Process and apparatus for degassing of fluid metals
US3310850A (en) * 1963-12-13 1967-03-28 Rheinstahl Huettenwerke Ag Method and apparatus for degassing and casting metals in a vacuum
DE1198071B (de) * 1964-06-19 1965-08-05 Bbc Brown Boveri & Cie Vorrichtung zum Umwaelzen und Homogenisieren fluessiger Metalle

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3765798A (en) * 1971-06-23 1973-10-16 Aeg Elotherm Gmbh Electromagnetic conveyor trough for conveying liquid metals
US3837531A (en) * 1972-02-14 1974-09-24 Modern Equipment Co Method for pouring liquid metal using electromagnetic pump
US3883045A (en) * 1972-09-30 1975-05-13 Aeg Elotherm Gmbh Electronic conveyor for molten metal with elevated pouring tube
US3961778A (en) * 1973-05-30 1976-06-08 Groupement Pour Les Activites Atomiques Et Avancees Installation for the treating of a molten metal
US4004902A (en) * 1974-01-25 1977-01-25 Nikolaus Sorg G.M.B.H. & Co. Method of dyeing and treating glass streams
US4146158A (en) * 1976-07-14 1979-03-27 Modern Equipment Company Apparatus for the quantitatively measurable casting of a molten metal with an electromagnetic dosing trough
US5058865A (en) * 1989-07-26 1991-10-22 British Steel Plc Liquid metal processing
USRE36082E (en) * 1992-01-20 1999-02-09 Asahi Glass Company Ltd. Vacuum degassing method and its apparatus
US5316563A (en) * 1992-01-20 1994-05-31 Asahi Glass Company Ltd. Vacuum degassing method and its apparatus
US20030015000A1 (en) * 2001-07-18 2003-01-23 Hayes James C. Method for controlling foam production in reduced pressure fining
US6854290B2 (en) * 2001-07-18 2005-02-15 Corning Incorporated Method for controlling foam production in reduced pressure fining
US20050155387A1 (en) * 2001-07-18 2005-07-21 Hayes James C. Method for controlling foam production in reduced pressure fining
US7134300B2 (en) * 2001-07-18 2006-11-14 Corning Incorporated Method for controlling foam production in reduced pressure fining
US20050160769A1 (en) * 2001-09-28 2005-07-28 Asahi Glass Company Limited Vacuum degassing apparatus for molten glass
US7650764B2 (en) * 2001-09-28 2010-01-26 Asahi Glass Company, Limited Vacuum degassing apparatus for molten glass
CN113443824A (zh) * 2021-06-21 2021-09-28 中国原子能科学研究院 退火装置及熔融系统

Also Published As

Publication number Publication date
GB1181500A (en) 1970-02-18
JPS501442B1 (en, 2012) 1975-01-18
FR1599072A (en, 2012) 1970-07-15

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