EP0862506A2 - Plaques-modeles refractaires dotees de canaux d'ecoulement de gaz - Google Patents

Plaques-modeles refractaires dotees de canaux d'ecoulement de gaz

Info

Publication number
EP0862506A2
EP0862506A2 EP96945982A EP96945982A EP0862506A2 EP 0862506 A2 EP0862506 A2 EP 0862506A2 EP 96945982 A EP96945982 A EP 96945982A EP 96945982 A EP96945982 A EP 96945982A EP 0862506 A2 EP0862506 A2 EP 0862506A2
Authority
EP
European Patent Office
Prior art keywords
gas
refractory
plates
sheet metal
channels
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Withdrawn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
EP96945982A
Other languages
German (de)
English (en)
Inventor
Lorenz Dötsch
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.)
Dotsch Marie-Luise (erbins Des Verstorbenen Erfinders)
Original Assignee
Dotsch Marie-Luise (erbins Des Verstorbenen Erfinders)
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 Dotsch Marie-Luise (erbins Des Verstorbenen Erfinders) filed Critical Dotsch Marie-Luise (erbins Des Verstorbenen Erfinders)
Publication of EP0862506A2 publication Critical patent/EP0862506A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/072—Treatment with gases
    • 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
    • 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 invention relates to a method for injecting gases into refractory-lined hot rooms or metallurgical vessels using refractory gas guide bodies with directed porosity, the gas guide channels of which open in the area of the hot side of the refractory lining.
  • the invention relates to a method for the production of refractory shaped plates for the injection of gases into refractory-lined hot rooms or metallurgical vessels and the use of such shaped plates.
  • the invention relates to a gas purging plug for metallurgical vessels, with a refractory molded block, a gas-tight sheet metal casing, consisting of a sheet metal jacket surrounding the lateral peripheral region of the molded block and a sheet metal base on the cold side of the molded block facing away from the melt and a gas supply pipe connected to the sheet metal base.
  • the invention has for its object to provide a method for injecting gases into such hot rooms or metallurgical vessels, with which the blowing times can be shortened. This object is achieved by the characterizing features of claim 1.
  • the thin-walled refractory mold plates used in this process can be produced by a process as stated in claim 2.
  • the gas channels running inside the shaped blocks can run in the longitudinal direction of the refractory shaped plates, but they can also be comb-like and open on adjacent sides of the shaped plate.
  • the channels can have different cross sections, which are formed by inserting strips of different thicknesses.
  • the mold plates according to the invention with the inner gas guide channels are also particularly suitable for the production of gas purging stones with directed porosity, as described in claims 4 to 9.
  • the gas passage channels are formed, for example, in that threads or tapes are worked into the shaped green body when filling the casting mold with pasty refractory material, which then have to be pulled out of the green body.
  • the gas passage channels In the known gas purging stones, however, it can be difficult to produce the gas passage channels with a constant cross section over their length, since the inner surface of the channels damaged when pulling out the inserted strips or the plates with the embossed grooves are difficult to place exactly on top of each other.
  • the gas passage channels must be so narrow that molten metal does not penetrate into the interior of the channels in the unpressurized state and can solidify there.
  • the gas passage channels located in the interior of the mold plates allow the mold plates to be joined together in any way when the washing body is formed, since this no longer impairs the cross-sectional constancy of the channels. This considerably simplifies the production of the entire gas flushing plug.
  • the refractory shaped plates are made from rolled green compacts, so that the refractory material is comparatively highly compressed and a low porous material is produced which has a correspondingly high wear resistance.
  • the flushing body consisting of the individual shaped plates is preferably seen above a porous block of material which has an undirected porosity when viewed in the use position of the gas flushing block.
  • This arrangement makes it possible to visually recognize the state of wear of the gas purging plug when it has been worked down to the area of the porous block. Then, in the bottom area of the pan, a circular, dark spot is formed, which is caused by the increased cooling effect of the inflowing gas.
  • a gas distribution space is expediently provided between the underside of the shaped block or the porous block and the sheet metal base, so that the gas to be fed in directly into the porous block or onto it without flow resistance subsequent sink can reach.
  • the shaped plates can already be connected to one another by rolling or pressing during the production of the green bodies.
  • the gas-tight connection of the individual mold plates is facilitated in that they are produced with the aid of a rolling process and as a result have very smooth and uniform surfaces.
  • Form plates assembled in this way can also absorb the very high thermal stresses that occur much better, since any cracks that arise generally only extend to the outside of the neighboring plate.
  • the shaped plates produced by rolling preferably have a thickness between 1 and 10 mm and a width between 10 and 100 mm, so that the respective flushing bodies can be adapted to almost all gas flushing stone sizes.
  • the refractory mold plates can, for. B. consist of a mixture of A1 2 0 3 , MgO and ZrO, which are mixed with water and whose pasty consistency is adjusted so that they can be shaped with the help of a rolling process.
  • the gas passage channels running inside the refractory mold plates are produced according to the invention during the rolling process of the green compacts or a corresponding endless strip, which is divided after the rolling, in that a desired number of strips made of a burnable or meltable one are compared to the deformation forces occurring during the rolling are comparatively dimensionally stable. After the subsequent melting or burning out, these film strips form the later gas passage channels in the interior of the individual shaped plates with a very precise and uniform cross section.
  • the film strips can be continuously fed to the roll gap in a very simple manner in the mentioned rolling process, the rolling process being e.g. B. can be done in that the roll gap two different tapes of pre-prepared refractory material run or the material is introduced in the form of a single strand in the roll gap.
  • Such rolling processes can be found, for example, in EP 0 536 584 A2 or DE-PS 41 33 712 C2.
  • the resulting shaped plates are solidified by a heat treatment to be carried out after the rolling, with melting or burning out of the film, and can then be installed in the interior of the gas purging plug in a known manner while encapsulating with pasty refractory material.
  • FIG. 1 is a perspective view of a mold plate with a comb-shaped gas passage
  • FIG. 2 is a perspective view of a mold plate with three gas passage channels
  • FIG. 3 shows a perspective view of a washing body composed of a plurality of shaped plates
  • Fig. 4 shows a section through a gas purging plug with rinsing body and porous lower block
  • FIG. 5 shows a partial section through the gas purging plug according to FIG. 4.
  • FIGS. 1 and 2 show shaped plates 1 and 2 produced by rolling with gas passage channels 3 running in the longitudinal direction, the shaped plate 1 according to FIG. 1 having a comb-shaped gas passage channel 3 and the shaped plate 2 according to FIG. 2 showing three gas passage channels 3 on- points.
  • the number or dimensions of the gas passage channels 3 are based on the available injection areas or the desired gas throughputs and pressures.
  • FIG. 3 schematically shows a flushing body 4 formed by gluing the individual mold plates 2, on the hot side 5 facing the melt of which a plurality of gas passage channels 3 open.
  • gas sink 6 consists of a refractory material 7, which is surrounded laterally by a conical sheet metal jacket 8 and a lower sheet metal base 9.
  • a gas feed pipe 10 is welded to the sheet metal base 9.
  • a gas distribution space 12 is located between the underside 11 of the refractory material 7 and the sheet metal base 9.
  • the purging body 4 is arranged, which is traversed by a multiplicity of gas passage channels 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Incineration Of Waste (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

Pour insuffler des gaz à l'intérieur de chambres chaudes à revêtement à l'épreuve du feu ou pour réaliser un puits à gaz (6) avec une porosité orientée, l'invention propose d'utiliser des plaques-modèles fabriquées à partir de comprimés crus laminés et renfermant des canaux de passage de gaz (3). Ces canaux de passage de gaz (3) sont produits lors de l'opération de laminage par mandrinage ou intégration de films indéformables constitués d'un matériau pouvant fondre ou brûler et qui, après le laminage des comprimés crus des plaques-modèles, sont fondus ou brûlés.
EP96945982A 1995-11-14 1996-11-12 Plaques-modeles refractaires dotees de canaux d'ecoulement de gaz Withdrawn EP0862506A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19542446A DE19542446C2 (de) 1995-11-14 1995-11-14 Feuerfeste Formplatten mit Gasführungskanälen
DE19542446 1995-11-14
PCT/DE1996/002149 WO1997018335A2 (fr) 1995-11-14 1996-11-12 Plaques-modeles refractaires dotees de canaux d'ecoulement de gaz

Publications (1)

Publication Number Publication Date
EP0862506A2 true EP0862506A2 (fr) 1998-09-09

Family

ID=7777438

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96945982A Withdrawn EP0862506A2 (fr) 1995-11-14 1996-11-12 Plaques-modeles refractaires dotees de canaux d'ecoulement de gaz

Country Status (12)

Country Link
EP (1) EP0862506A2 (fr)
JP (1) JP2000500527A (fr)
KR (1) KR19990067556A (fr)
CN (1) CN1202122A (fr)
AU (1) AU1866897A (fr)
BR (1) BR9611717A (fr)
CA (1) CA2237628A1 (fr)
DE (1) DE19542446C2 (fr)
IL (1) IL124463A0 (fr)
MX (1) MX9803850A (fr)
TR (1) TR199800852T2 (fr)
WO (1) WO1997018335A2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6583247B1 (en) 1999-03-16 2003-06-24 Infineum International Ltd. Process for producing free radical polymerized copolymers
DE19954918C2 (de) * 1999-11-16 2001-09-20 Veitsch Radex Gmbh Wien Feuerfester keramischer Gasspülstein
DE102006031687B4 (de) * 2006-07-08 2008-08-14 Refractory Intellectual Property Gmbh & Co. Kg Element
DE102013107311A1 (de) * 2013-07-10 2015-01-15 Thyssenkrupp Industrial Solutions Ag Verfahren und Vorrichtung zur Nachbehandlung des bei der Vergasung anfallenden C-haltigen Bodenproduktes
EP2893992B1 (fr) * 2014-01-09 2015-12-30 Refractory Intellectual Property GmbH & Co. KG Élément de rinçage de gaz et élément de raccord de gaz associé
CN104120281A (zh) * 2014-08-06 2014-10-29 辽宁伊菲科技股份有限公司 一种镶嵌于浇包底或保温炉中的除气装置
CN109735679B (zh) * 2018-12-29 2023-06-20 甘肃酒钢集团宏兴钢铁股份有限公司 一种转炉底吹砖更换和间隙修复的装置及其方法

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
LU85131A1 (de) * 1983-12-12 1985-09-12 Arbed Gasdurchlaessiger baukoerper aus feuerfestem material
NL8600608A (nl) * 1986-03-10 1987-10-01 Hoogovens Groep Bv Converter voor het bereiden van staal.
JPH0731151B2 (ja) * 1987-10-14 1995-04-10 トヨタ自動車株式会社 空所を備えた積層型セラミック構造体の製造方法
DE4133712C2 (de) * 1991-10-11 1994-06-30 Dyko Industriekeramik Gmbh Verfahren zur Herstellung eines Verbundwerkstoffs aus mindestens zwei Schichten
DE4207881C1 (en) * 1992-03-12 1993-08-26 Veitscher Magnesitwerke-Actien-Gesellschaft, Wien, At Gas flushing brick for melting vessels - has gas channels slightly inclined to vertical to ensure that gas flow is towards centre of vessel despite non-vertical fitting of brick inside vessel bottom
US5423521A (en) * 1992-05-19 1995-06-13 Quigley Company, Inc. Ceramic plug gas distribution device
DE4419811C1 (de) * 1994-06-07 1995-04-27 Plibrico Gmbh Gasspülstein mit Verschleißanzeige

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9718335A2 *

Also Published As

Publication number Publication date
CA2237628A1 (fr) 1997-05-22
DE19542446C2 (de) 1998-05-28
CN1202122A (zh) 1998-12-16
KR19990067556A (ko) 1999-08-25
JP2000500527A (ja) 2000-01-18
BR9611717A (pt) 1999-06-29
WO1997018335A3 (fr) 1997-08-28
WO1997018335A2 (fr) 1997-05-22
AU1866897A (en) 1997-06-05
IL124463A0 (en) 1998-12-06
DE19542446A1 (de) 1997-05-15
TR199800852T2 (xx) 1998-07-21
MX9803850A (es) 1998-09-30

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