EP0424621B1 - Verfahren zum Herstellen einer Schieberverschlussplatte für metallurgische Zwecke - Google Patents

Verfahren zum Herstellen einer Schieberverschlussplatte für metallurgische Zwecke Download PDF

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Publication number
EP0424621B1
EP0424621B1 EP90115486A EP90115486A EP0424621B1 EP 0424621 B1 EP0424621 B1 EP 0424621B1 EP 90115486 A EP90115486 A EP 90115486A EP 90115486 A EP90115486 A EP 90115486A EP 0424621 B1 EP0424621 B1 EP 0424621B1
Authority
EP
European Patent Office
Prior art keywords
plate
plate body
tension band
steel
band
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
EP90115486A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0424621A1 (de
Inventor
Rainer Patjens
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
Priority to AT90115486T priority Critical patent/ATE86899T1/de
Publication of EP0424621A1 publication Critical patent/EP0424621A1/de
Application granted granted Critical
Publication of EP0424621B1 publication Critical patent/EP0424621B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B22D41/14—Closures
    • B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
    • B22D41/28—Plates therefor
    • B22D41/30—Manufacturing or repairing thereof

Definitions

  • the invention relates to a method for producing a closure plate for a slide closure arranged on the spout of a container intended for receiving the molten metal, in which a plate body made of refractory material is surrounded by a heated tensioning band made of steel and this is cooled down on the peripheral surface of the plate body shrinking.
  • Such a method is known for example from DE 33 04 938 C1.
  • a hardenable mortar layer is first spread on the peripheral surface of the plate body and then the plate body provided with the mortar layer is surrounded by a steel ring and this is shrunk on.
  • the excess mortar is squeezed out up and down; the mortar remaining between the steel ring and the plate body hardens at the same time due to the temperature effect of the steel ring. In this case, no forces are transmitted from the tensioning strap to the plate body.
  • a problem with such and other state-of-the-art closure plates for slide closures is the formation of cracks in the plate material, in particular due to the thermal shock stress during casting, since the temperature gradients occurring in the plate material and the tensile stresses induced thereby are greatest.
  • the crack formation not only reduces the durability of the closure plate and thus impairs the safety of a slide closure arranged, for example, on the spout of a metallurgical ladle, but also increases the risk of oxygen and nitrogen being sucked in, as a result of which the quality of the molten metal, e.g. a molten steel suffers during pouring.
  • the wear behavior of the closure plate is improved and its service life is increased, the safety of the casting process is increased and the quality of the molten metal, in particular the molten steel, which is poured out of the container, Improved because no bad gases are sucked in due to the lack of cracks.
  • the tensioning band is preferably selected with regard to steel quality and dimension such that the compressive stresses occurring due to the shrinking in the plate material are not significantly greater than approximately 75% of the compressive strength of the plate material.
  • the compressive stresses should preferably be in the order of magnitude between 30 and 70 N / mm2, in particular 50 to 60 N / mm2.
  • a tensioning strap be used, the steel quality and dimensions of which are selected such that the tensile stresses occurring in the tensioning strap do not exceed the yield strength of the steel from which the tensioning strap is made by shrinking. In this way, only elastic deformations of the tension band arise when shrinking on.
  • the invention also proposes to use a plate body with a circular shape which is known per se. It has been shown that crack formation can best be avoided with the resulting generation of uniform compressive stresses in the plate material.
  • the measure serves to use a plate body with a smooth or smoothed peripheral surface. This prevents voltage peaks.
  • the height of the tensioning band is about 0.5 to 10 mm, preferably about 2 to 4 mm less than the height of the Plate body is.
  • the tensioning band should be shrunk on approximately in the middle of the peripheral surface of the plate body, so that the tensioning band is at approximately the same distance from the top and the bottom of the plate body.
  • the plate body 3 shown in FIG. 1, made of refractory material, of a closure plate for a slide closure arranged on the spout of a container intended to hold molten metal has a circular shape and is equipped with a central circular cylindrical flow opening 4.
  • the invention can also be used with closure plates of a different shape and several flow openings, but the circular shape ensures that the compressive stresses in the plate material are distributed as evenly as possible.
  • a tension band 1 of wall thickness w is shrunk as a ring and

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Sliding-Contact Bearings (AREA)
EP90115486A 1989-10-25 1990-08-11 Verfahren zum Herstellen einer Schieberverschlussplatte für metallurgische Zwecke Expired - Lifetime EP0424621B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90115486T ATE86899T1 (de) 1989-10-25 1990-08-11 Verfahren zum herstellen einer schieberverschlussplatte fuer metallurgische zwecke.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3935482 1989-10-25
DE3935482A DE3935482C1 (enrdf_load_stackoverflow) 1989-10-25 1989-10-25

Publications (2)

Publication Number Publication Date
EP0424621A1 EP0424621A1 (de) 1991-05-02
EP0424621B1 true EP0424621B1 (de) 1993-03-17

Family

ID=6392149

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90115486A Expired - Lifetime EP0424621B1 (de) 1989-10-25 1990-08-11 Verfahren zum Herstellen einer Schieberverschlussplatte für metallurgische Zwecke

Country Status (7)

Country Link
EP (1) EP0424621B1 (enrdf_load_stackoverflow)
JP (1) JPH03165965A (enrdf_load_stackoverflow)
AT (1) ATE86899T1 (enrdf_load_stackoverflow)
DE (2) DE3935482C1 (enrdf_load_stackoverflow)
DK (1) DK0424621T3 (enrdf_load_stackoverflow)
ES (1) ES2040536T3 (enrdf_load_stackoverflow)
GR (1) GR3007462T3 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2695335B1 (fr) * 1992-09-09 1994-11-18 Lorraine Laminage Tiroir linéaire de poche à acier.
BE1012319A3 (fr) * 1998-12-02 2000-09-05 Int Ind Eng Sa Organe de coulee.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8013402U1 (de) * 1980-05-17 1980-08-21 Martin & Pagenstecher Gmbh, 5000 Koeln Schieberplatte fuer schieberverschluesse
DE3304938C1 (de) * 1983-02-12 1984-05-03 Didier-Werke Ag, 6200 Wiesbaden Verfahren zum Aufbringen eines metallischen Spannbandes auf die Umfangsflaeche einer Verschlussplatte fuer einen Schiebeverschluss
DE3345539C1 (de) * 1983-12-16 1985-07-18 Didier-Werke Ag, 6200 Wiesbaden Feuerfeste Verschlußplatte für Schieberverschlüsse
US4615471A (en) * 1985-06-19 1986-10-07 M. H. Detrich Refractory plate and method for reinforcing
CA1279189C (en) * 1985-11-18 1991-01-22 Tetsuya Yoshihara Rotary nozzle system

Also Published As

Publication number Publication date
EP0424621A1 (de) 1991-05-02
DE3935482C1 (enrdf_load_stackoverflow) 1990-09-27
ATE86899T1 (de) 1993-04-15
DK0424621T3 (da) 1993-05-17
ES2040536T3 (es) 1993-10-16
DE59001044D1 (de) 1993-04-22
GR3007462T3 (enrdf_load_stackoverflow) 1993-07-30
JPH03165965A (ja) 1991-07-17

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