EP0070913A1 - Récipient pour le traitement de métaux en fusion - Google Patents

Récipient pour le traitement de métaux en fusion Download PDF

Info

Publication number
EP0070913A1
EP0070913A1 EP81105911A EP81105911A EP0070913A1 EP 0070913 A1 EP0070913 A1 EP 0070913A1 EP 81105911 A EP81105911 A EP 81105911A EP 81105911 A EP81105911 A EP 81105911A EP 0070913 A1 EP0070913 A1 EP 0070913A1
Authority
EP
European Patent Office
Prior art keywords
vessel
molten metal
outlet pipe
inlet pipe
diameter
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.)
Granted
Application number
EP81105911A
Other languages
German (de)
English (en)
Other versions
EP0070913B1 (fr
Inventor
Richard A. Dr.-Ing. Weber
Carl-Heinz Dipl.-Ing. Schütz
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.)
Thyssen AG
Original Assignee
Thyssen AG
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
Application filed by Thyssen AG filed Critical Thyssen AG
Priority to DE8181105911T priority Critical patent/DE3174127D1/de
Priority to EP81105911A priority patent/EP0070913B1/fr
Priority to US06/401,207 priority patent/US4437652A/en
Priority to JP57129726A priority patent/JPS5867833A/ja
Publication of EP0070913A1 publication Critical patent/EP0070913A1/fr
Application granted granted Critical
Publication of EP0070913B1 publication Critical patent/EP0070913B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • C22B9/04—Refining by applying a vacuum

Definitions

  • the invention relates to a vessel for the continuous treatment of molten metals under negative pressure by the circulation process, in particular for degassing steel melts, the bottom of which has an inlet pipe immersed in the molten metal and a spatially separated outlet pipe, in particular immersed in the molten metal, outlet pipe is provided for the treated molten metal.
  • Vessels of this type are used in particular in the degassing of liquid steel using the so-called circulation process (RH process).
  • RH process circulation process
  • the liquid steel located in a pan placed below the vessel is obtained by introducing conveying gas into the inlet pipe and using a sub pressure in the vessel is lifted into the vessel and flows back into the pan in a constant flow through the outlet pipe of the vessel.
  • the treatment time of the steel in this process is given by the circulation rate of the steel, which in turn depends on the vessel diameter and the cross sections of the inlet and outlet pipes (DE-OS 1 458 874).
  • the steelworker strives to keep the treatment time of the steel as short as possible.
  • the object of the present invention is to provide a vessel for the treatment of liquid metal of the type mentioned at the beginning, with which a significantly higher circulation rate of the liquid metal can be achieved with a small space requirement compared to conventional vessels.
  • the vessel bottom is in the region of the connecting line of the inlet pipe and the Outlet pipe enlarged so that with a larger cross-section of the inlet pipe and outlet pipe for a higher throughput, the required distance of the pipes from one another and from the vessel walls can be maintained and therefore there is no risk of increased erosion of the refractory material.
  • the vessel is only enlarged in the lower area, the overall space requirement of the device has changed insignificantly. In particular, the height of the vessel can remain unchanged, which is particularly important with regard to the manipulations of the vessel required during the repair of the ff material.
  • the surface of the vessel according to the invention is considerably smaller than the surface of a vessel of conventional construction with which an equally large circulation rate can be achieved. For this reason, there are savings in the refractory material of the lining and also in the heating output to be used for heating the vessel.
  • the bottom of the vessel is not circular, but has a cross-sectional shape which is determined by the fact that the diameter of the bottom of the vessel passing through the axes of the inlet tube and the outlet tube is larger than the diameter of the bottom of the vessel extending perpendicularly between the inlet tube and the outlet tube.
  • This geometry can be realized in various ways, for example by an elliptical shape or a cigar-shaped shape or by a rectangular shape, the elliptical shape being preferred.
  • Such a vessel which is flattened at least on one side, offers sufficient free space in the case of a steelworks pan with a circular cross section arranged underneath the vessel, in order to be able to carry out the addition of additives between the vessel jacket and the rim of the pan into the pan without problems.
  • the lower part of the vessel is designed such that its cross-sectional area increases continuously in the direction of the bottom of the vessel, that is to say it is bell-shaped.
  • the lining of the vessel wall can be carried out easily.
  • a gradual expansion of the cross section of the lower part of the vessel is possible.
  • the vessel shown in the drawings consists of a cylindrical, in particular circular cylindrical upper part 1 and a lower part 2 flanged to it.
  • the upper part 1 of the container is closed to the atmosphere by a cover 3.
  • Addendix 3 Via an obliquely opening into the upper part 1 of the shaft 4, in which a lock at the end provided outside, additives, for example alloying agents, can be introduced.
  • the vessel 1, 2 can be placed under negative pressure by means of a suction device 5 connected to the upper vessel part 1.
  • an inlet pipe 7 and an outlet pipe 8 are arranged spatially separated from one another, which dip into the molten metal of a pan 9 arranged under the vessel 1, 2.
  • Gas, for example argon, nitrogen or carbon monoxide, is introduced via a line 10 opening into the inlet pipe 7.
  • the gas rising as bubbles in the inlet pipe 7 has the effect of reducing the specific weight of the volume composed of molten metal and gas in the inlet pipe 7. Since the gas bubbles separate in the molten metal in the vessel 1, 2, the molten metal in the outlet pipe 8 no longer contains the specific weight-reducing gas bubbles, so that due to the different weights in the two pipes 7, 8, in conjunction with the negative pressure in the vessel 1, 2, the molten metal is pumped over the vessel 1, 2 and treated, in particular degassed.
  • the device described so far is known as a device for performing the RH circulation process (DE-OS 14 58 874).
  • the vessel bottom is enlarged at least in the direction of the straight line running through both axes of the inlet pipe 7 and outlet pipe 8, so that at Larger cross-sections of the inlet and outlet pipe 7, 8 and larger, mutual distance from the walls, there is enough space to at least reduce the risk of erosion from the surrounding metal.
  • the bottom 6 of the vessel 1, 2 has an elliptical shape. This elliptical shape leaves enough space on both sides of the connecting line of the two tubes in a circular pan 9 in order to be able to add additives into the melt.
  • the vessel base 6 it is not necessary, as in the case of an elliptical shape, for the vessel base 6 to be flattened on both sides with respect to a circular one. It is sufficient if the flattening is only provided on one side for the addition of additives.
  • the side walls merge obliquely into the upper part of the vessel in the region of the longitudinal axis of the elliptical base 6, while the walls run perpendicularly in the region of the elliptical axis lying transversely thereto.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
EP81105911A 1981-07-27 1981-07-27 Récipient pour le traitement de métaux en fusion Expired EP0070913B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE8181105911T DE3174127D1 (en) 1981-07-27 1981-07-27 Vessel for the treatment of molten metal baths
EP81105911A EP0070913B1 (fr) 1981-07-27 1981-07-27 Récipient pour le traitement de métaux en fusion
US06/401,207 US4437652A (en) 1981-07-27 1982-07-23 Vessel for the treatment of molten metal
JP57129726A JPS5867833A (ja) 1981-07-27 1982-07-27 溶融金属の処理容器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81105911A EP0070913B1 (fr) 1981-07-27 1981-07-27 Récipient pour le traitement de métaux en fusion

Publications (2)

Publication Number Publication Date
EP0070913A1 true EP0070913A1 (fr) 1983-02-09
EP0070913B1 EP0070913B1 (fr) 1986-03-19

Family

ID=8187836

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81105911A Expired EP0070913B1 (fr) 1981-07-27 1981-07-27 Récipient pour le traitement de métaux en fusion

Country Status (4)

Country Link
US (1) US4437652A (fr)
EP (1) EP0070913B1 (fr)
JP (1) JPS5867833A (fr)
DE (1) DE3174127D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0532141A1 (fr) * 1991-09-12 1993-03-17 MANNESMANN Aktiengesellschaft Récipient de dégazage pour le traitement sous vide d'acier en fusion

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5520718A (en) * 1994-09-02 1996-05-28 Inland Steel Company Steelmaking degassing method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU36598A1 (fr) *
LU36943A1 (fr) * 1958-03-10
US3022059A (en) * 1958-03-10 1962-02-20 Hoerder Huettenunion Ag Apparatus for treating metal melts
DE1458874A1 (de) * 1959-05-13 1970-03-19 Rheinstahl Huettenwerke Ag Vakuumentgasung von geschmolzenen Metallen,insbesondere Stahl
US3547622A (en) * 1968-06-12 1970-12-15 Pennwalt Corp D.c. powered plasma arc method and apparatus for refining molten metal

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU36598A1 (fr) *
LU36943A1 (fr) * 1958-03-10
US3022059A (en) * 1958-03-10 1962-02-20 Hoerder Huettenunion Ag Apparatus for treating metal melts
DE1458874A1 (de) * 1959-05-13 1970-03-19 Rheinstahl Huettenwerke Ag Vakuumentgasung von geschmolzenen Metallen,insbesondere Stahl
US3547622A (en) * 1968-06-12 1970-12-15 Pennwalt Corp D.c. powered plasma arc method and apparatus for refining molten metal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0532141A1 (fr) * 1991-09-12 1993-03-17 MANNESMANN Aktiengesellschaft Récipient de dégazage pour le traitement sous vide d'acier en fusion

Also Published As

Publication number Publication date
JPS5867833A (ja) 1983-04-22
DE3174127D1 (en) 1986-04-24
US4437652A (en) 1984-03-20
EP0070913B1 (fr) 1986-03-19

Similar Documents

Publication Publication Date Title
DE4142447C2 (de) Tauchgießrohr - Dünnbramme
EP0254909B1 (fr) Busette de coulée réfractaire
CH636784A5 (de) Gekuehlte stranggiesskokille mit einer einrichtung zur erzeugung eines elektromagnetischen kraftfeldes.
EP1294508B1 (fr) Unite de busette de coulee refractaire a monter sur la goulotte d'une cuve contenant une matiere en fusion, notamment le panier de coulee d'une installation de coulee en bande
EP0403808B1 (fr) Tube plongeur pour l'introduction d'acier liquide dans une lingotière de coulée continue
DE1458133A1 (de) Metall-Stranggussverfahren und Einrichtung zu seiner Durchfuehrung
EP0070913B1 (fr) Récipient pour le traitement de métaux en fusion
EP0297258B1 (fr) Coquille pour la coulée continue de profiles d'entrées pour laminage de poutrelles
DE2933466C2 (de) Gefäß für die Behandlung von geschmolzenem Metall
EP0107069A1 (fr) Procédé pour la coulée continue de métaux, en particulier de l'acier et installations de coulée continue pour la mise en oeuvre du procédé
DE2325690A1 (de) Verfahren und vorrichtung fuer den strangguss von beruhigtem stahl
DE3331575C2 (de) Verfahren zum Bogenstranggießen von Metall, insbesondere von Stahl
DE69003768T2 (de) Verfahren und Vorrichtung zum kontinuierlichen Heisstauchbeschichten von Stahlbändern.
EP0934786B1 (fr) Procédé pour la coulée continue de métal et installation de coulée continue appropriée
DE3000507A1 (de) Verfahren und vorrichtung zum elektromagnetischen giessen
EP0561181A2 (fr) Tuyau de coulée dans un convertisseur ou un four à arc
DE2657406C3 (de) Vorrichtung zum Reinigen der Schmelze beim horizontalen Stranggießen
EP1099497A1 (fr) Lingotière pour la coulée continue de métal à région d'entrée en forme d'entonnoir
EP0276453A1 (fr) Dispositif pour la coulée de métaux liquides
DE3136847C1 (de) Verfahren und Vorrichtung zum Horizontalstranggiessen von fluessigen Metallen,insbesondere von Stahl
DE2501603B2 (de) Einrichtung zur vakuumbehandlung fluessiger metalle
DE2509284A1 (de) Einrichtung zum kontinuierlichen giessen eines stranges
DE19520897C1 (de) Strangguß-Verteilerrinne
DE1458178A1 (de) Zwischenpfanne fuer das Stranggiessen von Metall
DE2138394A1 (de) Strangguss-verfahren und -vorrichtung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19811015

AK Designated contracting states

Designated state(s): DE FR GB IT

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB IT

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILANO S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 3174127

Country of ref document: DE

Date of ref document: 19860424

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19900622

Year of fee payment: 10

Ref country code: FR

Payment date: 19900622

Year of fee payment: 10

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19900827

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19910727

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19920331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19920401

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST