EP1110646B1 - Quenouille - Google Patents

Quenouille Download PDF

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Publication number
EP1110646B1
EP1110646B1 EP00117590A EP00117590A EP1110646B1 EP 1110646 B1 EP1110646 B1 EP 1110646B1 EP 00117590 A EP00117590 A EP 00117590A EP 00117590 A EP00117590 A EP 00117590A EP 1110646 B1 EP1110646 B1 EP 1110646B1
Authority
EP
European Patent Office
Prior art keywords
section
nose
stopper rod
base part
whose
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
EP00117590A
Other languages
German (de)
English (en)
Other versions
EP1110646A2 (fr
EP1110646A3 (fr
Inventor
Wolfram HÖLLER
Dirk Masurat
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.)
Veitsch Radex GmbH and Co OG
Original Assignee
Veitsch Radex GmbH and Co OG
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 Veitsch Radex GmbH and Co OG filed Critical Veitsch Radex GmbH and Co OG
Publication of EP1110646A2 publication Critical patent/EP1110646A2/fr
Publication of EP1110646A3 publication Critical patent/EP1110646A3/fr
Application granted granted Critical
Publication of EP1110646B1 publication Critical patent/EP1110646B1/fr
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
    • B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
    • B22D41/18—Stopper-rods therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/30—Self-sustaining carbon mass or layer with impregnant or other layer

Definitions

  • the invention relates to a so-called monobloc stopper designed plug rod for the flow control of metallurgical melting vessels.
  • plug rod consists of a cylindrical Plug rod body made of a refractory, carbon-containing Material, with the plug rod body on a base part for receiving a guide rod and on its end with a nose-like (cap-like) section is trained.
  • the monoblock plug in its axial direction from an associated orifice carried away in the metallurgical vessel as soon as the molten metal should flow out, or on the spout lowered and sealed against it, if the metal melt flow can be reduced or interrupted should.
  • GB-A-2 095 612 proposes to produce a reinforced monoblock stopper by isostatic pressing, only the nose-like section being formed from a refractory material containing zirconium.
  • EP 0 721 388 B1 a generic stopper rod in which the Plug rod body in whole or in part with one layer is covered, which contains 4 to 9 wt .-% carbon and at least one sintering aid, this surface layer compressed after a fire above 1,000 ° C and impermeable to gases should be.
  • the thickness of the layer is with specified less than 10 mm. According to an embodiment is the layer on the nasal section of the Plug rod limited.
  • Such a plug rod is difficult to manufacture, especially if it is to be pressed isostatically, such as proposed in EP 0 721 388 B1, since the aforementioned Surface layer in the area of the nose-like section difficult to assemble in a suitable mold is. It can also easily cause the chipping Layer when applied.
  • the object of the invention is therefore a plug rod of the aforementioned kind to improve that can be produced in a simple process, the aforementioned Formation is reliably prevented and a trouble-free use as a regulator in metallurgical Melting vessels enabled.
  • the basic idea of the invention is instead of only in Surface area of the nose-like portion formed Protective layer from the entire nose-like section a refractory material other than that of the base part form with an interface between the nose-shaped Section and the base part throughout Cross section of the plug rod is formed.
  • the stopper rod as a whole easy to manufacture, for example by pressing first the material of the nose-shaped section is filled into the mold and then the shape with the material of the Base part is filled before the pressing process begins. Already through the pressing process it comes over the whole Cross section of the plug rod body into one Connection of the mutual materials of the base part and nasal section.
  • Another essential idea of the invention is in making the nose-like section of a refractory Form material, the carbon content of one oxidizing fire above 900 ° C in at least one near the surface Area burns out.
  • carbonaceous material is formed after Burn different zones in the nose-like section from, namely an inner part that continues to contain carbon and an outer, the entire nose-like section covering part, which is now carbon-free.
  • a further optimization can be achieved by unglazing the nose-like portion, the Burnout of carbon in the surface area is supported becomes.
  • the nose-like section can be made of a material a carbon content ⁇ 10 wt .-% exist.
  • the goal A selection of materials serves a low thermal expansion for the nose-like section based on zirconium mullite, the zirconium mullite content being over 50% by weight is.
  • the mix of materials can be further refractory Oxides and / or sintering aids are added. So the material for the nose-like section 5 to 20 Contain wt .-% silicon nitride.
  • the Plug rod be designed so that it is after an oxidizing Fire above 900 ° C a carbon free Surface layer of the nose-like section in one Thickness of at least 4 mm, the thickness (Thickness) of this layer typically between 4 and 10 mm is based on a diameter of the cylindrical Plug rod body of at least 300 mm, the Diameter can also be significantly higher.
  • the reference numeral 10 describes a plug rod overall, consisting of a base part 12 and a nose-like (Cap-like) designed free end section 14.
  • the nose-like section 14 consists of a material based on zirconium mullite and it contains 15% by weight Silicon nitride and 5% graphite also 5% by weight sintering aid.
  • the stopper rod shown was at about 1,000 ° C fired oxidizing, with the result that one with the Reference numeral 20 shown, about 5 mm thick surface area of the nose-like section 14 is now free of carbon, while the enclosed core 22 of the nose-like section 14 is further carbon-containing.
  • the integral formation of the nose-like section 14 over the interface 18 with the base part 12 leads to an intimate connection of the jointly pressed sections 12, 14 and - after fire - to one too integral formation of a carbon-free surface layer 20 in the area of the nose-like section 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Cell Electrode Carriers And Collectors (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Fluid-Damping Devices (AREA)

Claims (8)

  1. Quenouille avec :
    1.1 un corps de quenouille cylindrique (10) composé d'un matériau réfractaire contenant du carbone,
    1.2 le corps de quenouille (10) étant formé sur une pièce de base (12) pour recevoir une tige de guidage et comprenant à son extrémité libre une section en forme de nez (14) caractérisée :
    1.3 en ce que la section en forme de nez (14) se compose d'un autre matériau réfractaire que la pièce de base (12), une interface (18) s'étendant sur la totalité de la section du corps de quenouille (10) entre la section en forme de nez (14) et la pièce de base (12), et
    1.4 en ce que la section en forme de nez (14) se compose d'un matériau réfractaire dont la teneur en carbone s'épuise au moins dans une zone proche de la surface (20) lors d'une combustion oxydante au-dessus de 900°C.
  2. Quenouille selon la revendication 1 dont la section en forme de nez (14) n'est pas vitrifiée.
  3. Quenouille selon la revendication 1 dont la pièce de base (12) est vitrifiée en surface.
  4. Quenouille selon la revendication 1 dont la section en forme de nez (14) se compose d'un matériau avec une teneur en carbone < 10 % en poids.
  5. Quenouille selon la revendication 1 dont la section en forme de nez (14) se compose d'un matériau à base de mullite de circonium.
  6. Quenouille selon la revendication 1 dont la pièce de base (12) se compose d'un matériau avec une teneur en carbone > 20 % en poids.
  7. Quenouille selon la revendication 1 dont la pièce de base (12) se compose d'un matériau à base d'alumine et/ou de corindon.
  8. Quenouille selon la revendication 1 avec une couche de surface (20) de la section en forme de nez (14) d'une épaisseur d'au moins 4 mm, qui est exempte de carbone après une combustion oxydante au-dessus de 900°C.
EP00117590A 1999-12-24 2000-08-16 Quenouille Expired - Lifetime EP1110646B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19963147A DE19963147C1 (de) 1999-12-24 1999-12-24 Stopfenstange
DE19963147 1999-12-24

Publications (3)

Publication Number Publication Date
EP1110646A2 EP1110646A2 (fr) 2001-06-27
EP1110646A3 EP1110646A3 (fr) 2001-10-10
EP1110646B1 true EP1110646B1 (fr) 2003-11-05

Family

ID=7934603

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00117590A Expired - Lifetime EP1110646B1 (fr) 1999-12-24 2000-08-16 Quenouille

Country Status (5)

Country Link
US (1) US6511751B2 (fr)
EP (1) EP1110646B1 (fr)
AT (1) ATE253425T1 (fr)
DE (2) DE19963147C1 (fr)
ES (1) ES2209733T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112792960A (zh) * 2021-02-01 2021-05-14 北京利尔高温材料股份有限公司 一种新型低成本高效率整体塞棒棒头模具

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2165537A1 (de) * 1971-12-30 1973-07-19 Maximilianshuette Eisenwerk Verfahren zur erhoehung der haltbarkeit und der wirtschaftlichkeit von ausgussoeffnungen an gefaessen zur aufnahme von fluessigem metall
GB2095612B (en) * 1981-04-01 1985-02-06 Thornton James Menzies A stopper for a foundry mould
US4791978A (en) * 1987-11-25 1988-12-20 Vesuvius Crucible Company Gas permeable stopper rod
JPH0347671A (ja) * 1989-07-14 1991-02-28 Harima Ceramic Co Ltd 溶融金属の流量制御装置用耐火物
JP2627473B2 (ja) * 1992-07-15 1997-07-09 新日本製鐵株式会社 連続鋳造用ロングストッパー
FR2699841A1 (fr) * 1992-12-28 1994-07-01 Vesuvius France Sa Quenouille comportant un capuchon de renforcement du nez.
IN191421B (fr) * 1994-06-15 2003-11-29 Vesuvius Frnance Sa

Also Published As

Publication number Publication date
EP1110646A2 (fr) 2001-06-27
DE19963147C1 (de) 2001-05-10
EP1110646A3 (fr) 2001-10-10
US20020031668A1 (en) 2002-03-14
ES2209733T3 (es) 2004-07-01
ATE253425T1 (de) 2003-11-15
US6511751B2 (en) 2003-01-28
DE50004315D1 (de) 2003-12-11

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