EP0483521A1 - Connection entre le trou de coulée et la busette de coulée de récipients metallurgiques - Google Patents

Connection entre le trou de coulée et la busette de coulée de récipients metallurgiques Download PDF

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Publication number
EP0483521A1
EP0483521A1 EP91116530A EP91116530A EP0483521A1 EP 0483521 A1 EP0483521 A1 EP 0483521A1 EP 91116530 A EP91116530 A EP 91116530A EP 91116530 A EP91116530 A EP 91116530A EP 0483521 A1 EP0483521 A1 EP 0483521A1
Authority
EP
European Patent Office
Prior art keywords
constriction
pouring tube
spout
section
connection
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.)
Withdrawn
Application number
EP91116530A
Other languages
German (de)
English (en)
Inventor
Hans Rothfuss
Axel Dr. Eschner
Albert Ott
Siegfried Pohl
Ernst Lührsen
Wilhelm Parbel
Manfred Winkelmann
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.)
Didier Werke AG
Original Assignee
Didier Werke 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 Didier Werke AG filed Critical Didier Werke AG
Publication of EP0483521A1 publication Critical patent/EP0483521A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B22D41/502—Connection arrangements; Sealing means therefor

Definitions

  • the invention relates to a connection between a refractory spout of a spout closure for discharging melt from metallurgical vessels and a refractory pouring tube, shadow tube or the like which can be connected thereto, the spout and pouring tube being connected to one another via a, in particular conical, sealing seat.
  • Rei metallurgical vessels such as ladles or intermediate vessels, melt is discharged via a pouring spout, to the mostly replaceable spout of which a pouring tube or immersion tube can be connected in order to discharge the melt, for example, into a continuous casting mold.
  • a sealing seat between the spout and the pouring tube, which is to prevent the entry of air into the pouring tube. Nevertheless, it always happens that when casting melt in the connection or transition area from the smaller pouring cross-section of the spout to the larger pouring cross-section of the pouring tube, a flow vacuum is created, which air passes through the sealing seat can flow into the pouring tube from the atmosphere.
  • special seals or the introduction of protective gas into the sealing area are of little help. The result is that part of the flowing melt is oxidized in the air and has an unacceptable loss of quality.
  • the object of the present invention is to prevent the occurrence of air-sucking flow pressures in the pouring tube using simple technical means.
  • the object is achieved in that the flow opening at the inlet end of the pouring tube is kept smaller than the flow opening at the outlet end of the spout in order to generate a melt pressure above atmospheric pressure. In this way, the problem of air entering the pouring tube and the associated contamination of the melt is eliminated.
  • the technical means required for this are far less important than the known complex sealing means, which do not guarantee reliable sealing anyway.
  • the invention proposes that the constriction in the pouring tube begins with a continuously increasing constriction section in continuation of the mouth cross section of the spout. This results in a continuous build-up of the melt pressure in the pouring tube.
  • the constriction can also end in an aerodynamically favorable manner by providing a continuous expansion towards the given pouring tube cross section.
  • the individual sections of the constriction can expediently have a conical, cylindrical and / or rounded shape.
  • constriction is equally advantageously provided on an insert built into the pouring tube or is formed on the pouring tube itself.
  • FIG. 1 for the sake of simplicity, of a spout closure for metallurgical vessels, only the outlet end of the spout 1 is shown, which has a flow opening 2, an outlet surface 3 and an outer conical sealing surface 4.
  • the inlet end of the pouring tube 5 is sealingly connected via an inner counter-profiled sealing surface 6, either by means of a snug fit or by means of a sealant, for example mortar, mineral fiber or the like.
  • a refractory insert 9 is provided in the flow opening 8 of the pouring tube 5 with a constriction 10, the diameter of which is kept smaller than the diameter of the flow opening 2 at the outlet end of the spout 1 and which has the task of one against the atmospheric pressure build up higher pressure in the melt flow.
  • the construction takes place continuously by means of a uniform conical section 11 starting from the mouth surface 3 of the flow opening 2 of the spout 1.
  • the increased flow pressure in a cylindrical constriction section 12 is then maintained until the risk of vacuum formation in the region of the sealing seat 7 is excluded. Only then does the melt enter the given flow opening 8 of the pouring tube 5.
  • the constriction 13 is formed directly at the flow opening 8 of the pouring tube 5 and in addition the cylindrical constriction section 15 adjoining the conical constriction section 14 has an expansion section 16.
  • an insert 17 and 18 having a constriction is again provided, the constriction 19 of the insert 17 being achieved by circularly rounding off the individual constriction sections discussed above.
  • the constriction 21 of the insert 18 is equipped with a three-stage constriction profile 22 similar to FIG. 2. Possible constriction profiles and their dimensions depend essentially on the local flow conditions in the spout 1 and pouring tube 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Furnace Charging Or Discharging (AREA)
EP91116530A 1990-10-31 1991-09-27 Connection entre le trou de coulée et la busette de coulée de récipients metallurgiques Withdrawn EP0483521A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4034652A DE4034652A1 (de) 1990-10-31 1990-10-31 Verbindung zwischen ausguss und giessrohr an metallurgischen gefaessen
DE4034652 1990-10-31

Publications (1)

Publication Number Publication Date
EP0483521A1 true EP0483521A1 (fr) 1992-05-06

Family

ID=6417393

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91116530A Withdrawn EP0483521A1 (fr) 1990-10-31 1991-09-27 Connection entre le trou de coulée et la busette de coulée de récipients metallurgiques

Country Status (3)

Country Link
EP (1) EP0483521A1 (fr)
KR (1) KR920007720A (fr)
DE (1) DE4034652A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SI1506827T1 (sl) 2003-08-01 2006-02-28 Hof Te Fiennes N V Livni sistem in postopek za litje nezeleznih kovinskih talin

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU180308A1 (ru) * 1962-09-18 1966-03-21 В. Е. Гирский , Е. С. Борисовский Сборный стакан для промежуточных ковшей установок непрерывной разливки стали
US4131219A (en) * 1976-08-03 1978-12-26 United States Steel Corporation Pouring of molten metals
DE3029529A1 (de) * 1980-08-04 1982-03-04 Didier-Werke Ag, 6200 Wiesbaden Gleitschieberverschluss mit austauschbaren feuerfesten verschleissteilen
EP0048641A1 (fr) * 1980-09-15 1982-03-31 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Protection d'un métal en fusion dans un obturateur à plaques
FR2529811A1 (fr) * 1982-07-12 1984-01-13 Didier Werke Ag Fermeture pour un recipient renfermant une masse metallique fondue liquide, notamment fermeture a tiroir pour poche de coulee
GB2150059A (en) * 1983-11-22 1985-06-26 Didier Werke Ag Shielding a stream of molten metal from the atmosphere
FR2559081A1 (fr) * 1984-02-02 1985-08-09 Metacon Ag Pieces d'usure refractaires pour obturateurs coulissants
EP0306751B1 (fr) * 1987-09-07 1994-06-29 DANIELI & C. OFFICINE MECCANICHE S.p.A. Procédé de coulée pour machine de coulée continue à hauteur et busette de coulée immergée consécutive

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU180308A1 (ru) * 1962-09-18 1966-03-21 В. Е. Гирский , Е. С. Борисовский Сборный стакан для промежуточных ковшей установок непрерывной разливки стали
US4131219A (en) * 1976-08-03 1978-12-26 United States Steel Corporation Pouring of molten metals
DE3029529A1 (de) * 1980-08-04 1982-03-04 Didier-Werke Ag, 6200 Wiesbaden Gleitschieberverschluss mit austauschbaren feuerfesten verschleissteilen
EP0048641A1 (fr) * 1980-09-15 1982-03-31 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Protection d'un métal en fusion dans un obturateur à plaques
FR2529811A1 (fr) * 1982-07-12 1984-01-13 Didier Werke Ag Fermeture pour un recipient renfermant une masse metallique fondue liquide, notamment fermeture a tiroir pour poche de coulee
GB2150059A (en) * 1983-11-22 1985-06-26 Didier Werke Ag Shielding a stream of molten metal from the atmosphere
FR2559081A1 (fr) * 1984-02-02 1985-08-09 Metacon Ag Pieces d'usure refractaires pour obturateurs coulissants
EP0306751B1 (fr) * 1987-09-07 1994-06-29 DANIELI & C. OFFICINE MECCANICHE S.p.A. Procédé de coulée pour machine de coulée continue à hauteur et busette de coulée immergée consécutive

Also Published As

Publication number Publication date
KR920007720A (ko) 1992-05-27
DE4034652A1 (de) 1992-05-07

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