EP1711292B1 - Plaque pour un système fermeture à tiroir pour récipient métallurgique ainsi que son procédé de fabrication - Google Patents

Plaque pour un système fermeture à tiroir pour récipient métallurgique ainsi que son procédé de fabrication Download PDF

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Publication number
EP1711292B1
EP1711292B1 EP05791426A EP05791426A EP1711292B1 EP 1711292 B1 EP1711292 B1 EP 1711292B1 EP 05791426 A EP05791426 A EP 05791426A EP 05791426 A EP05791426 A EP 05791426A EP 1711292 B1 EP1711292 B1 EP 1711292B1
Authority
EP
European Patent Office
Prior art keywords
insert
slide plate
basic body
plate according
slide
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.)
Active
Application number
EP05791426A
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German (de)
English (en)
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EP1711292A1 (fr
Inventor
Reinhard Ehrengruber
Carl Hoffmann
Robert Sherriff
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.)
Refractory Intellectual Property GmbH and Co KG
Original Assignee
Refractory Intellectual Property GmbH and Co KG
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Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=35517577&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1711292(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Refractory Intellectual Property GmbH and Co KG filed Critical Refractory Intellectual Property GmbH and Co KG
Priority to PL05791426T priority Critical patent/PL1711292T3/pl
Publication of EP1711292A1 publication Critical patent/EP1711292A1/fr
Application granted granted Critical
Publication of EP1711292B1 publication Critical patent/EP1711292B1/fr
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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
    • 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

Definitions

  • the invention relates to a slide plate for a slide closure on metallurgical melting vessels.
  • Slide plates which are understood to mean both plates for linear slides and rotary valves, have been used for decades to control the outflow of metallurgical melting vessels, for example pans or so-called intermediate containers (tundish).
  • Such slide closures consist for example of two plates, a fixed and a movable plate. Both Plates have at least one flow passage for an associated molten metal, the opening being perpendicular to the main surfaces of the plates.
  • the plates are movable relative to each other so that corresponding openings of the plates can be offset, partially overlapping or aligned with each other to adjust the mass of the melt passed therethrough or to interrupt the melt flow.
  • the wall portion of the flow openings wears in the course of use.
  • a commonly used method is to encase a prefabricated insert body with a refractory hydraulic mass (a concrete). In this way, almost any insert geometries can be used. During the heating, however, the hydraulic bond of the matrix material of the main body loses at least part of its strength. Only at temperatures well above 1000 ° C, a solid ceramic bond is generated. In this context, a "strength hole" is used, usually around 900 ° C. When using the slide plate, a strong temperature gradient forms between the area of the passage opening and the edge of the plate. In the region of the passage opening, the refractory material approximately assumes the temperature of the liquid steel (for example 1,600 ° C.). At the edge of the plate, the temperature is much lower. Inevitably, this creates areas inside the panel that are only heated up to the "strength hole" (about 900 ° C). The wear of these plates is correspondingly high.
  • the present invention seeks to provide a slide plate for a slide closure on a metallurgical melting vessel, which has a wear-resistant insert in the region of the passage opening for the molten metal, wherein the slide plate is to be produced in a simple process and on her total volume as constant as possible high strength (wear resistance) has.
  • the invention is based on the cited prior art, in which the use is fixed in situ during compression of a refractory matrix material surrounding the insert for the base body in this.
  • the insert is described below as “annular” this may be “exactly annular", resulting in a circular shape of the outer peripheral portion of the insert.
  • the term also includes forms in which the insert, stepped in the axial direction of its opening between opposite end faces, outside, that is designed with different outer diameters or designed with a conical peripheral surface.
  • Ring-shaped also includes unbalanced circumferential shapes and an off-center arrangement of the opening. In this respect, ring-shaped only relies on the insert having an opening for carrying out the molten metal.
  • a space is formed between the insert and the base body, usually in the form of an annular gap between the circumferential surface of the insert and the corresponding surface of the base body, which at least partially prevents a frictional connection between the two.
  • This space (gap) can also be multi-part.
  • the invention relates to a slide plate for a slide closure on a metallurgical melting vessel, having the features of claim 1.
  • the mentioned sections between insert and body, in which there is no positive connection between the two parts, are usually extremely narrow and have a width of usually ⁇ 100 microns, often ⁇ 10 microns. Such a narrow space (gap) can obviously not be filled with a mortar or the like. However, the use of a (liquid) impregnating agent makes it possible to fill this cavity (these cavities) and in this way to connect the two parts together.
  • the space can be filled with a carbonaceous impregnating agent.
  • a carbonaceous impregnating agent may be, for example, a substance from the group: coal tar pitch, petrol pitch, phenolic resin.
  • the slide plate After removal from the press, the slide plate is impregnated (impregnated) with such a substance and then tempered on the plate Temperatures between 200 and 700 ° C, so coked the impregnating agent and solidifies, creating the desired frictional connection between the annular insert and the surrounding body.
  • the gap or gaps between the two components are thus connected by means of a continuous carbon layer.
  • the impregnation can be limited to the aforementioned transition region between insert and body. But it is also possible to choose the impregnation range larger, up to the impregnation of the entire plate.
  • the impregnation has the additional advantage that the overall tightness of the board in the impregnated area is increased and its sliding properties are improved.
  • the impregnation can be optimized if both the use and the material of the main body before impregnation have an open porosity between 5 and 20% by volume.
  • the open porosity of the body will usually be higher than that of the insert, since the insert is already used as a preformed, usually pre-pressed part.
  • Base body has a width ⁇ 70 microns, for example between 20 and 70 microns. This can be adjusted, for example, by selecting the grain size for the insert or the base body.
  • the base body can optionally also be created by casting.
  • the gap is then usually slightly higher, so that the width of the space (gap) between the insert and the base plate before impregnation and after any drying of the plate may be greater than the mentioned 100 microns.
  • the features described in the prior art in terms of material selection can also be transferred to the slide plate according to the invention.
  • the use will usually have a higher wear resistance than the main body. This can be used for the body cheaper material qualities, which reduces the price of the slide plate as a whole.
  • insert and body are made of different refractory ceramic materials.
  • a suitable material for use is a material based on ZrO 2 .
  • materials based on Al 2 O 3 can be used for the main body.
  • the slide plate can be prepared by different methods, as explained above, a method has proved advantageous in which a pre-pressed, annular insert made of a refractory ceramic material in a pressing process in a base made of a refractory ceramic material, demoulded, and the thus formed slide plate is then soaked and tempered in the transition region between the insert and the base body with an impregnating agent, as claimed in claim 9.
  • a fired annular insert of MgO stabilized zirconia was placed in a press mold.
  • the insert was then surrounded with an alumina-based molding compound in such an amount that the molding compound (to form the body) projects beyond the upper face of the insert, to an extent such that after the subsequent pressing operation the upper face of the main body is aligned with the upper end face of the insert.
  • FIG. 1 shows, in the sharp transition between insert 1 and the base body 2, an approximately 5 micron wide layer 3 of coked coal tar pitch is microscopically detectable.
  • This filling layer creates a frictional connection between the insert and the envelope (main body).
  • the insert is thus securely and reliably fixed relative to the body.
  • the slide plate could be tested together with a slide plate of the same construction to form a slide closure system. Six batches of steel were cast without the insert losing its non-positive connection in the main body.
  • the plate 10 is placed horizontally on a ring 12, wherein the insert 14 does not rest.
  • the insert 14 has an outer diameter of 130 mm, an inner diameter of the bore of 80 mm and is 15 mm thick. From above, the plate at six points 16, which lie at a uniform angular distance on an imaginary circle, to the top 140 of the insert 14 is drilled. A punch 18 with six corresponding pressure cylinders 20 is now inserted into the holes. The force was measured at which the insert 14 is destroyed or breaks out of the plate 10.
  • the insert can extend over the entire height of the slide plate (perpendicular to the main surfaces). Likewise, it is also possible to graduate the outer diameter of the insert ring, corresponding to a corresponding gradation of the surrounding body. In this way, an additional mechanical security is created, that the ring rests securely on use on a corresponding collar of the base plate and can not be solved in the flow direction of the molten metal.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Claims (9)

  1. Plaque de distributeur pour un système de fermeture du distributeur sur un creuset métallurgique, comportant les caractéristiques suivantes :
    a) la plaque de distributeur comporte un corps de base (2) réalisé dans un matériau céramique réfractaire,
    b) le corps de base (2) comporte au moins un orifice de passage, qui est orienté perpendiculairement aux surfaces principales du corps de base (2),
    c) le corps de base (2) entoure un insert (1) annulaire, réalisé dans un matériau céramique réfractaire,
    d) le corps de base (2) et l'insert (1) sont compactés conjointement,
    e) l'insert (1) entoure de toutes parts l'orifice de passage au moins dans la zone d'une surface principale du corps de base (2) et est aligné avec cette surface principale,
    f) un espace (3), présent entre l'insert (1) et le corps de base (2) sous la forme d'une fente annulaire entre la face périphérique de l'insert et la surface correspondante du corps de base, est rempli d'un matériau d'imprégnation, par lequel le corps de base (2) et l'insert (1) sont assemblés à force l'un à l'autre après durcissement par trempe de la plaque de distributeur entre 200° et 700°C.
  2. Plaque de distributeur selon la revendication 1, dont l'espace (3) est rempli d'un matériau d'imprégnation contenant du carbone.
  3. Plaque de distributeur selon la revendication 1, dont l'espace (3) est rempli d'un matériau d'imprégnation choisi dans le groupe : brai de houille, brai de pétrole, résine phénolique.
  4. Plaque de distributeur selon la revendication 1, dont l'espace (3) est en forme de fente avec une largeur inférieure à 100 µm.
  5. Plaque de distributeur selon la revendication 1, dont l'insert (1) a une résistance à l'usure supérieure à celle du corps de base (2).
  6. Plaque de distributeur selon la revendication 1, dont l'insert (1) et le corps de base (2) sont réalisés dans des matériaux céramiques réfractaires différents.
  7. Plaque de distributeur selon la revendication 1, dont l'insert (1) est réalisé dans un matériau à base de ZrO2.
  8. Plaque de distributeur selon la revendication 1, dont le corps de base (2) est réalisé dans un matériau à base de Al2O3.
  9. Procédé de fabrication d'une plaque de distributeur selon la revendication 1, dans lequel un insert annulaire précompacté et d'un matériau céramique réfractaire est inserté dans un processus de compactage dans un corps de base en matériau céramique réfractaire, est démoulé et la plaque de distributeur ainsi formée est imprégnée ensuite d'un matériau d'imprégnation dans la zone de transition entre l'insert et le corps de base et est durcie par trempe.
EP05791426A 2004-10-18 2005-09-16 Plaque pour un système fermeture à tiroir pour récipient métallurgique ainsi que son procédé de fabrication Active EP1711292B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05791426T PL1711292T3 (pl) 2004-10-18 2005-09-16 Płyta zasuwowa wylewu suwakowego dla naczyń metalurgicznych oraz sposób jej wytwarzania

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004050702A DE102004050702B3 (de) 2004-10-18 2004-10-18 Schieberplatte
PCT/EP2005/009956 WO2006042596A1 (fr) 2004-10-18 2005-09-16 Plaque a coulisse

Publications (2)

Publication Number Publication Date
EP1711292A1 EP1711292A1 (fr) 2006-10-18
EP1711292B1 true EP1711292B1 (fr) 2008-06-11

Family

ID=35517577

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05791426A Active EP1711292B1 (fr) 2004-10-18 2005-09-16 Plaque pour un système fermeture à tiroir pour récipient métallurgique ainsi que son procédé de fabrication

Country Status (16)

Country Link
US (1) US7703644B2 (fr)
EP (1) EP1711292B1 (fr)
CN (1) CN1968772B (fr)
AR (1) AR051220A1 (fr)
AT (1) ATE397987T1 (fr)
BR (1) BRPI0512324A (fr)
CA (1) CA2567598C (fr)
DE (2) DE102004050702B3 (fr)
EA (1) EA009962B1 (fr)
EG (1) EG25557A (fr)
ES (1) ES2308547T3 (fr)
MX (1) MXPA06014446A (fr)
PL (1) PL1711292T3 (fr)
UA (1) UA80793C2 (fr)
WO (1) WO2006042596A1 (fr)
ZA (1) ZA200609392B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI120385B (fi) * 2007-07-06 2009-10-15 Indref Oy Sulkumekanismi sulan metallin annostelemiseksi ja menetelmä sulkumekanismin valmistamiseksi
EP2481500A1 (fr) 2011-01-31 2012-08-01 Stopinc Aktiengesellschaft Plaque de fermeture et fermeture coulissante au niveau d'une busette de coulée d'un récipient contenant un métal en fusion
USD732094S1 (en) * 2012-07-20 2015-06-16 Ivoclar Vivadent Ag Firing plate for a dental furnace

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2830199C2 (de) * 1978-07-10 1979-11-08 Martin & Pagenstecher Gmbh, 5000 Koeln Feuerfeste Platte für einen Schieber-Verschluß an Metallschmelze enthaltenden Gefäßen
ATE112195T1 (de) * 1991-07-26 1994-10-15 Schladovsky Leopold Schieberverschluss an metallurgischen gefässen.
US5335833A (en) * 1992-09-14 1994-08-09 Vesuvius Crucible Company Zirconia graphite slide gate plates
US5373976A (en) * 1993-04-16 1994-12-20 Vesuvius Crucible Company Refractory zirconia mortar
JPH07308756A (ja) * 1994-05-18 1995-11-28 Tokyo Yogyo Co Ltd スライディングノズルプレート
JPH07308757A (ja) * 1994-05-18 1995-11-28 Tokyo Yogyo Co Ltd スライディングノズルプレート
JPH0957428A (ja) * 1995-08-22 1997-03-04 Toshiba Ceramics Co Ltd 溶鋼流量制御用スライディングゲートプレート
JP2000117421A (ja) * 1998-10-13 2000-04-25 Shinagawa Refract Co Ltd スライドバルブプレート及びその製造方法
DE10006939C1 (de) * 2000-02-16 2001-03-08 Didier Werke Ag Ringförmiger Einsatz für eine Schieberplatte sowie zugehörige Schieberplatte
TW526315B (en) 2001-03-06 2003-04-01 Vesuvius Crucible Co Process for repairing a crack resistant valve plate and plate so repaired
DE10306037A1 (de) * 2003-01-24 2004-08-05 Knöllinger Keramische Verschleißteile GmbH Verfahren zur Reparatur von Kopf- Schieber-und/oder Ausgußplatte einer Verschlussvorrichtung für die Boden-Ausgußöffnung einer Gießpfanne oder Verteilerrinne, sowie entsprechend reparierte Kopf-und/oder Schieberplatte

Also Published As

Publication number Publication date
US20070241486A1 (en) 2007-10-18
DE502005004395D1 (de) 2008-07-24
UA80793C2 (uk) 2007-10-25
MXPA06014446A (es) 2007-03-21
EA009962B1 (ru) 2008-04-28
US7703644B2 (en) 2010-04-27
CN1968772A (zh) 2007-05-23
CA2567598C (fr) 2010-06-01
EG25557A (en) 2012-02-23
AR051220A1 (es) 2006-12-27
PL1711292T3 (pl) 2008-11-28
DE102004050702B3 (de) 2006-02-02
CN1968772B (zh) 2012-05-30
ZA200609392B (en) 2008-06-25
EP1711292A1 (fr) 2006-10-18
CA2567598A1 (fr) 2006-04-27
EA200602261A1 (ru) 2007-10-26
BRPI0512324A (pt) 2008-02-26
ES2308547T3 (es) 2008-12-01
WO2006042596A1 (fr) 2006-04-27
ATE397987T1 (de) 2008-07-15

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