EP1797976A2 - Pierre de lavage à gaz - Google Patents

Pierre de lavage à gaz Download PDF

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Publication number
EP1797976A2
EP1797976A2 EP06021283A EP06021283A EP1797976A2 EP 1797976 A2 EP1797976 A2 EP 1797976A2 EP 06021283 A EP06021283 A EP 06021283A EP 06021283 A EP06021283 A EP 06021283A EP 1797976 A2 EP1797976 A2 EP 1797976A2
Authority
EP
European Patent Office
Prior art keywords
core
flushing
filling
contour
free
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Withdrawn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
EP06021283A
Other languages
German (de)
English (en)
Other versions
EP1797976A3 (fr
Inventor
Thomas Dr. Schraven
Peter Schrader
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.)
Pa-Ha-Ge Feuerfeste Erzeugnisse & Co KG GmbH
Original Assignee
Pa-Ha-Ge Feuerfeste Erzeugnisse & Co KG GmbH
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 Pa-Ha-Ge Feuerfeste Erzeugnisse & Co KG GmbH filed Critical Pa-Ha-Ge Feuerfeste Erzeugnisse & Co KG GmbH
Publication of EP1797976A2 publication Critical patent/EP1797976A2/fr
Publication of EP1797976A3 publication Critical patent/EP1797976A3/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Withdrawn legal-status Critical Current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
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/002—Treatment with gases
    • B22D1/005—Injection assemblies therefor
    • 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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/48—Bottoms or tuyéres of converters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge

Definitions

  • the present invention relates to a flushing cone having the features of the preamble of claim 1.
  • Flushing cones are known as interchangeable inserts that allow the introduction of gases into molten metals in a container lined with refractory material. The efficiency of this secondary metallurgical treatment depends directly on the effectiveness of the flushing effect of the flushing cone. Flushing cones are generally subject to high chemical, mechanical and thermo-mechanical wear. This explains why repeated attempts have been made to increase the durability of the purging cone and to improve the rinsing effect.
  • flushing cones can generally be assigned to two groups, on the one hand one-piece flushing cones, which are manufactured from a refractory material into which flushing channels have been introduced in the longitudinal direction. The flushing channels are then formed by residue-free burning out of plastic strips, nets, foils, etc. during annealing or firing process. A jacket of the flushing cone with sheet metal and attaching a flange for the gas inlet to the bottom plate complete the arrangement and are state of the art.
  • Flushing cones are also known, which consist of two nested ceramic truncated cones. By introducing a plurality of metal strips between the two truncated cones, a cavity is formed, through which gas can then be blown into the molten metal.
  • a flushing plug which has an inner porous part and an outer gas-tight part. The two parts are filled together in a mold and also pressed together and fired.
  • a gas-permeable core is arranged in an embedding material. Between the core and embedding material, a substantially frusto-conical metal shell is arranged, which has an outer contour. This contour allows a positive retention in an embedding material. Due to the different materials and the associated different thermal expansion occurs in such rinsers to gap formation between the refractory materials and the metal shell. The wear is relatively high.
  • a flushing cone with the features of claim 1. Because the core has internal scavenging passages and is formed as a molded part separately from the filling, which has an outer contour enabling a positive locking in the direction of the axis, which is free of metallic components, the solid ceramic filling can safely secure the likewise ceramic core in both hold in the direction of the axis occurring load directions without liquid metal can penetrate into the transition region between the core and surrounding material.
  • An outer contour of the core which can be reliably produced even under the conditions of ceramic production results if the contour has at least sections of formations or indentations running transversely to the axis. These can be formed, in particular, as outwardly facing convex areas such as ribs or webs, but also as inwardly pointing constrictions, grooves or other concave areas.
  • the outer contour of the core is free of spacers, anchors and the like.
  • the desired advantages in terms of the ceramic material arise when the core is made of a heavy clay concrete. It is advantageous if the filling is made of a coarse ceramic concrete and has no internal flushing channels.
  • FIG. 1 shows a flushing cone with a core 1 which extends from a side 2 facing the melt to a side 3 of the flushing cone facing away from the melt.
  • the core 1 is surrounded by a filling 4, which in turn is surrounded by an outer metal jacket 5.
  • the jacket 5 leaves the upper side 2 free, while covering the lower side 3 substantially.
  • Region 6 is provided here with a connecting piece 7.
  • the core 1 further comprises a number of gas channels 8, which extend with a free cross section from the bottom 3 to the top 2 of the core 1.
  • the flushing channels 8 are open to the connection piece 7. At the top 2, the flushing channels 8 emerge freely from the top 2.
  • the core 1 is provided in this illustration with a trapezoidal or truncated cone-shaped cross section, which tapers from the bottom 3 to the top 2 towards.
  • Bracket 11 is arranged on the upper side, which simplifies the installation of the flushing cone.
  • This bracket 11 is welded from sheet metal and with the sheath 5.
  • the Jacket 5 itself consists essentially of a circumferential, rotationally symmetrical metal jacket, which is welded gas-tight in the corner region at reference numeral 12 with bottom plate 6.
  • FIG. 2 shows a cross section through the flushing cone described so far along the line II-II, that is to say perpendicular to the plane of the drawing of FIG. 1.
  • the same components have the same reference numerals.
  • the flushing channel 8 is substantially wider in its extent in the drawing plane of Figure 2 as perpendicular thereto, as explained in Figure 1. Further, the core 1 is provided with two plane-parallel outer sides 14, which are perfectly smooth. The outer sides 14 are each perpendicular to the outer sides 9 of Figure 1. The filling 4 surrounds the core 1 also on the outer sides 14 and complements the core 1 to the usual frusto-conical and rotationally symmetrical outer shape.
  • the core 1 In the production of the core 1 is first made of a refractory coarse-grained concrete, in which this material is filled into a corresponding shape.
  • the mold cavity is defined on the one hand by the plane-parallel outer walls 14 and on the other hand by the converging outer sides 9, which have the webs 10.
  • plastic strips Inside the mold cavity are plastic strips, usually embedded in polyethylene, which correspond in shape to the later gas channels 8.
  • the refractory material is then fired at temperatures of more than 1000 ° C, wherein the refractory material solidifies as usual and get the gas channels by residue-free combustion of the inserted plastic strips their free, open and continuous cross-section.
  • the thus fired core 1 is covered with a relatively coarse-grained concrete, which gives the filling 4 and the core 1 to the usual frusto-conical outer shape added.
  • This concrete is preferably made on the basis of alumina with or without spinel. But it is also possible to produce a concrete of magnesium oxide. Furthermore, it is possible to combine concrete on different raw material basis.
  • the concrete surrounding the core 1 is then tempered, the properties of the core 1 not changing.
  • the core 1 is held by its outer geometric shape with the webs 10 positively within the filling 4 and secured.
  • the filling 4 is provided with the metal jacket 5, the top 2 remains free.
  • the bottom plate 6 is supplemented by the bottom plate 6 and welded to the gas guide the flange 7.
  • gas is fed into the flange 7 and can then be introduced through the gas channels 8 in the upcoming at the top 2 melt.
  • the core 1 dissolves within the flushing cone and enters the melt, as may occur in other two-part flushing cones.
  • the described secure mounting of the core 1 in the filling 4 is ensured by simple design measures in the production, instead of making separate fasteners required. In practice, it has been shown that the flushing cone produced in this way exhibits excellent flushing readiness, ie it is neither subject to undesirably high wear nor clogged or completely fails.
  • the geometric shape of the core 1 in its embedding in the filling 4 is essential to the operation of the present invention.
  • the advantages of the invention are achieved in that between the core 1 and the filling 4 there is a form-fitting, which secures the core 1 after annealing the filling 4 therein.
  • the core 1 can also be designed round, rectangular or square.
  • the integrally formed on the core 1 webs 10, of which in the described embodiment, a total of six are provided, can be varied as desired in number and the geometric shape. It can also be provided, instead of the webs 10, which bulge outward into the filling 4, constrictions, grooves or the like in the core 1 mold. Such grooves are then filled when filling with the filling 4 and secure the core as well form-fitting within the filling. 4
  • the flushing cone is, apart from its coat, completely free of metal parts, core 1 and 4 filling are made of 100% ceramic, which promotes the desired benefits in terms of wear resistance and flushing readiness.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Cleaning In General (AREA)
EP06021283A 2005-12-15 2006-10-11 Pierre de lavage à gaz Withdrawn EP1797976A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005060432A DE102005060432A1 (de) 2005-12-15 2005-12-15 Spülkegel

Publications (2)

Publication Number Publication Date
EP1797976A2 true EP1797976A2 (fr) 2007-06-20
EP1797976A3 EP1797976A3 (fr) 2008-06-25

Family

ID=37909662

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06021283A Withdrawn EP1797976A3 (fr) 2005-12-15 2006-10-11 Pierre de lavage à gaz

Country Status (5)

Country Link
EP (1) EP1797976A3 (fr)
CN (1) CN101012488A (fr)
BR (1) BRPI0605215A (fr)
DE (1) DE102005060432A1 (fr)
RU (1) RU2006139774A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2111938A1 (fr) * 2008-04-24 2009-10-28 Calderys France Bouchon de purge par gaz de soufflage dans un récipient de traitement métallique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202009014246U1 (de) 2009-10-22 2009-12-24 Knöllinger Keramische Verschleißteile GmbH Gasspülstein
JP6540879B2 (ja) * 2016-02-25 2019-07-10 日本製鉄株式会社 ガス吹き込みノズル

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2516938B1 (fr) * 1981-11-23 1986-06-06 Usinor Dispositif pour l'introduction de gaz dans le bain de metal liquide
DE3433349C2 (de) * 1984-09-11 1987-04-23 Micheal Donald Ellwood City Pa. Labate Vorrichtung zum Einführen von Gas in eine Metallschmelze
DE3815664C1 (en) * 1988-05-07 1989-06-15 Burbach & Bender Ohg Esb Schweissbetrieb, 5900 Siegen, De Gas bubble brick for metallurgical vessels and method for its manufacture
CA2014999C (fr) * 1989-04-24 1999-09-07 Kenneth William Bates Injecteur de gaz
US5573724A (en) * 1994-07-29 1996-11-12 Magneco/Metrel, Inc. Ladle port assembly
DE19619204C1 (de) * 1996-05-11 1997-05-22 Veitsch Radex Ag Gasspüleinrichtung
DE19846524A1 (de) * 1998-10-09 2000-04-13 Knoellinger Keramische Erzeugn Zweiteiliger Fugenspüler
EP1243361A1 (fr) * 2001-03-19 2002-09-25 Vesuvius Crucible Company Dispositif pour introduire un gaz dans un métal liquide

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2111938A1 (fr) * 2008-04-24 2009-10-28 Calderys France Bouchon de purge par gaz de soufflage dans un récipient de traitement métallique
EP2111938B1 (fr) 2008-04-24 2017-04-19 Calderys France Bouchon de purge par gaz de soufflage dans un récipient de traitement métallique

Also Published As

Publication number Publication date
CN101012488A (zh) 2007-08-08
DE102005060432A1 (de) 2007-06-21
BRPI0605215A (pt) 2007-10-09
EP1797976A3 (fr) 2008-06-25
RU2006139774A (ru) 2008-05-20

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