EP0894033B1 - Gasspülboden für metallurgische gefässe - Google Patents

Gasspülboden für metallurgische gefässe Download PDF

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Publication number
EP0894033B1
EP0894033B1 EP97902266A EP97902266A EP0894033B1 EP 0894033 B1 EP0894033 B1 EP 0894033B1 EP 97902266 A EP97902266 A EP 97902266A EP 97902266 A EP97902266 A EP 97902266A EP 0894033 B1 EP0894033 B1 EP 0894033B1
Authority
EP
European Patent Office
Prior art keywords
gas
bottom according
gas purging
channels
purging bottom
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
EP97902266A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0894033A1 (de
Inventor
Manfred Slamenik
Franz Reiterer
Walter Hammerer
Karl-Heinz Dott
Klaus DÖSINGER
Michael Heiligenbrunner
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.)
DR. MARKUS *FELLNER
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
Priority to SI9730061T priority Critical patent/SI0894033T1/xx
Publication of EP0894033A1 publication Critical patent/EP0894033A1/de
Application granted granted Critical
Publication of EP0894033B1 publication Critical patent/EP0894033B1/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
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • 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
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ

Definitions

  • the invention relates to a gas purging tray for metallurgical Vessels, especially for steel making.
  • Gas purging stones in the form of discrete ones are known Gas purging elements. These are in the wall or the floor of a metallurgical vessel (pan, tundish, converter, Evacuation vessel etc.) installed. There are various Designs: with directional or non-directional porosity (for Example EP 0 521 371 B1), so-called slot and joint washer, so-called labyrinth washer (for example DE 37 27 938 C1) etc.
  • gas purging devices belong to the prior art integral part of a floor or wall of a metallurgical vessel.
  • the invention develops the basic idea of the above mentioned prior art (training a Gas purging device as an integral part of a refractory Lining of a metallurgical vessel) and offers a gas purging tray for metallurgical vessels with directed Porosity to within a part or all Refractory lining of the vessel is formed.
  • the directed porosity in the form of channels, slits or the like
  • the invention relates a gas purging tray for metallurgical vessels with a monolithic refractory ceramic lining in which by chemical or physical processes channels are formed the end associated with an adjacent vessel wall for direct or indirect fluidic Connection with a gas supply line are formed and its other end in the corresponding top layer of the refractory ceramic lining leak.
  • channel is in its most general meaning too understand that with regard to its geometry Is subject to restrictions, including pipe-like, slot-like, ring channel-like, network-like or step-like trained channels includes.
  • the channels can be caused by chemical or physical processes be formed. Above all, this includes: melting out or burning out corresponding deposits (with a Channel shape corresponding form) from corresponding Materials, but also, for example, the formation of the channels through laser technology (laser cutting).
  • the inserts can be made of fibrous, tubular, plate-like, net-like or step-like elements consist of that in a refractory ceramic mass during or can be mixed or inserted after their production.
  • the distribution of deposits can be regular or irregular done within the ceramic mass. It can - via the Cross section of a complete floor of a metallurgical Considered vessel - also zones with different Training or distribution of gas channels can be created. So can, for example, a larger number of rinsing channels in the middle be provided as in the edge region of the floor.
  • the ceramic lining can consist of standard varieties and be gas-tight since the gas permeability through the channels is achieved within the feed. This promotes good Durability of the floor.
  • the fluidic connection of the gas supply line with the Channels can be done in different ways:
  • the gas supply line can be connected directly to the inlet end of the channels are coupled.
  • Such Form is used, for example, when the channels of run from a common connection area.
  • Such Connection is shown schematically in section in Figure la.
  • the gas supply line can be led as a gas-tight supply line up to the upper edge of any permanent feed of the metallurgical vessel. However, it can, for example, also be connected directly to the metal jacket of the vessel or a coupling part arranged on the bottom, for example screwed on. The gas is then passed on, for example, through corresponding lines in the permanent feed to the channels of the monolithic floor feed.
  • Gas distribution element can be arranged as schematically in Section shown in Figures lc to le.
  • This distribution organ can - like the channels - for Example by chemical and / or thermal reaction (Decomposition / melting) of a corresponding insert are (Fig. 1c). But it can also consist of one Material, for example metal (Fig. 1d).
  • the insert consists of paper, cardboard, plastic or the like so after burning out the insert (where the term burnout for any kind of removal of the insert stands) a direct fluidic connection to the Reach gas supply.
  • burnout for any kind of removal of the insert stands
  • a direct fluidic connection to the Reach gas supply.
  • the insert can also be broken, so that the refractory matrix material first penetrates and later (after the insert burned out) a labyrinthine Structure of the rinsing channel or channels arises.
  • Flushing slots simultaneously function as expansion joints within of the monolithic refractory component, and thus one helpful additional function.
  • the insert is aligned vertically with refractory material poured over the entire height.
  • the hatched Sections G1, G2, ... Gn shown consist of a burn-out plastic, the intermediate sections are recesses in the insert, which are correspondingly fireproof Mass are filled out.
  • the bottom fields G1 are on rail-like end S of a gas supply line L is attached, those after the hatched fields G1, G2 ... Gn one burned out continuous gas flow from the end of the gas supply line over the Sections G1, G2, ... Gn creates in the molten metal, whereby the gas, for example, fields G1.2, G2.3, G3.2 and Gn.3 flowed through in succession.
  • Connecting sections V create Remove the insert a fluidic connection between adjacent sections (e.g.
  • connection area of the gas supply line and channels can be on or in the refractory lining. He can also on metallic outer jacket of the metallurgical vessel are formed, as schematically in Figures lc, d shown.
  • the channels can be connected to the gas supply line by Means (adapter) for fastening the insert (s) to the Gas supply line are supported.
  • Figures 3 and 4 show examples of this.
  • the gas supply line including the aforementioned adapter
  • connectable insert (s) are no further parts for the Formation of the purge gas line or purge gas channels necessary.
  • the production is simplified. this applies especially for gas purging devices where the refractory ceramic matrix material on or around the the aforementioned parts is cast.
  • the Gas supply line if necessary, the adapter
  • the inlays are mixed with (in) the mass (distributed) and to a floor or wall (if necessary a floor or wall segment) as well as then in the metal jacket of the metallurgical vessel used and the deposits (or already trained channels) connected to the gas supply.
  • the adapter mentioned can be an integral part of the be the gas outlet end of the gas supply line. He can for example from an external thread or a Bayonet lock exist, the body accordingly this end (the adapter) is screwed on or pushed on.
  • the adapter can also be an independent component, which on the gas outlet end of the gas supply line itself screwed (clamped) or welded to it.
  • the adapter in turn has anchoring means of the aforementioned kind for the body.
  • the adapter is larger than the gas supply line Have flow cross-section (for the treatment gas).
  • the adapter with multiple gas outlet openings to train.
  • the body then becomes corresponding with a number be formed by webs, each in the mounting position are assigned to a gas outlet opening. After the burnout become a multitude of individual gas channels, immediately starting from the adapter.
  • the shape of the body (the insoles) is - as stated - almost any.
  • the bodies can have a plate shape, a Surface shape, a net shape, a cylindrical shape, a cuboid shape, a cone shape or similar three-dimensional geometry exhibit.
  • the body sections can be interconnected be to make the assembly easier. Most of all will the body at its junction with the adapter preferably be in one piece in order to be easy to assemble enable.
  • the description of Figures 3 and 4 gives more Notes on this.
  • connection of one end of the Body with the adapter to get to Example after the burnout an immediate fluidic connection from the gas supply line into the then create exposed irrigation channels.
  • the insert (the body) can ensure melt with the (dense) refractory casing at its free end section tower over.
  • the body then stands in front of a sink (in front of the Burnout, or before pulling out) inside the metallurgical vessel.
  • a burnable body will Heating the refractory lining or when Filling the metal melt destroyed in terms of function.
  • a Coverage of the device (the body, or if necessary of the entire sink) with porous refractory mass possible.
  • floor When designing as part of a fireproof floor (The term floor according to the invention also means walls and parts or combinations of floors and walls) can be the described gas purging device after wear of the Replace or repair refractory material.
  • the refractory mass is broken out to the adapter and then put on a new body and with Refilled and / or coated refractory material. Gas purging line and Adapters are therefore reusable, only the insert and the worn refractory material will be replaced.
  • the design enables - as stated - the manufacture a gas purging tray as a prefabricated component.
  • the worn floor including flushing device
  • a new floor including flushing device
  • Edge-side positive locking elements facilitate the Connection to neighboring components.
  • Coupling parts on the Vessel bottom side of the prefabricated component facilitate the Adjustment of the floor during installation.
  • the precast idea leaves up to complete refractory linings (wall and floor) for metallurgical melting vessels.
  • the deposits can have a very small cross-sectional area be trained to avoid the risk of a To minimize molten metal infiltration.
  • the channel width / the Channel diameter should be maximum (when the sink is cold) 0.5 mm.
  • FIG. 1a shows a gas supply line 22 in its free end corresponding end of a body 28 made of plastic is inserted, which is similar to a candlestick opposite end in the form of numerous thin arms 32 branches.
  • the gas supply line 22 runs through the metallic shell 12 of a pan as well as a permanent lining 14 made of refractory ceramic stones. Thread-like webs 32 made of plastic are so in the monolithic pan bottom 20 arranged that they each have one end in the open end the line 22 protrude and with its other end into the Run 20 top of feed 20. After burnout a Channel network in the refractory lining corresponding to the web course 20, which connects directly to line 22.
  • the free end is the Gas supply line 22 in a bore 40 of the metal jacket 12 screwed in.
  • the floor 20 here is purely monolithic (without wall-side permanent lining) by pouring over a burn-out Body 28 formed with refractory mass.
  • the body 28 consists of a plate-like base part 28b and octopus-like of which thin arms 32 projecting laterally and upwards, the after burnout, a gas distribution chamber in the area of the base part 28b and form rinsing channels in the area of the arms 32.
  • the gas flow takes place accordingly from line 22 via the Gas distribution chamber and the channels in the melt.
  • the Body 28b lies centrally in the lining 20.
  • Thread-like arms 32 Plastic (integral with body 28b) extends from Body 28b to the top 20o of the lining (bottom) 20.
  • the Coupling part 50 fulfills two functions: it serves as Adjustment aid when inserting the bottom into a melting vessel to For example, a pan or a distributor if it goes through a corresponding opening 40 in the metal jacket of the vessel to be led. It also serves to connect the gas supply line (here: via a bayonet lock). After burning out the Body 28b (including the arms) is supplied with gas via the line 22, the coupling part 50 and by the Body and arms exposed areas in the Molten metal.
  • Fig. 3 shows a partial section of a cast steel ladle 10 with an outer metal armor 12, one arranged in front of it refractory lining 14 and an inner refractory monolithic lining 16 in the wall and floor areas 18, 20.
  • the steel armor 12 and the permanent lining 14 extend a metallic gas supply line 22 in the bottom Floor area 20 above the permanent feed 14 with the help a sleeve 24 is sealed to the outside.
  • the gas supply line is spiral and is gas-tight at its free end 22e metallic adapter 26, the quasi part of the Gas supply line 22 is.
  • the adapter 26 runs essentially perpendicular to the bottom-side permanent lining 14 and has a cylindrical shape.
  • a body 28 is on the upper free end of the adapter 26 (Fig. 4), which is constructed as follows:
  • the body 28 has an axially extending sleeve on the bottom 30, whose internal cross section is equal to or slightly larger than the outer cross section of the free end of the adapter 26 is so that the body 28 via the sleeve 30 with a positive fit on the Adapter 26 can be placed.
  • the sleeve 30 is at the top closed and radially extending from its upper end portion a plurality of webs 32, which merge into an annular web 34, to which there is a hollow cylindrical part 36 connects.
  • the body 28 is made as an injection molded part and thus one-piece.
  • FIG. 3 shows, lies on the refractory lining 14 a monolithic refractory liner 16 that covers the above of the continuous feed 14 extending area of the gas supply line 22, the adapter 26 and the body 28 (with the exception of its upper free end section) on all sides.
  • the fireproof So mass runs both within the hollow cylindrical Part 36 of the body 28 and in the area between the webs 32, 34 or around the aforementioned components.
  • the gas purging device consisting of Gas supply line 22, adapter 26 and body 28 is in the scope of Components described above on all sides in the Fireproof monolithic floor lining integrated.
  • the size of the body 28 or the cross sections its components are dependent on the respective Conditions of use and the desired amount of supplied gas adjusted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Furnace Details (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP97902266A 1996-02-07 1997-01-30 Gasspülboden für metallurgische gefässe Expired - Lifetime EP0894033B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI9730061T SI0894033T1 (en) 1996-02-07 1997-01-30 Gas-flushing bottom for metallurgical vessels

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19604413A DE19604413C1 (de) 1996-02-07 1996-02-07 Gasspüleinrichtung für metallurgische Gefäße
DE19604413 1996-02-07
PCT/EP1997/000406 WO1997028915A1 (de) 1996-02-07 1997-01-30 Gasspülboden für metallurgische gefässe

Publications (2)

Publication Number Publication Date
EP0894033A1 EP0894033A1 (de) 1999-02-03
EP0894033B1 true EP0894033B1 (de) 2000-03-01

Family

ID=7784741

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97902266A Expired - Lifetime EP0894033B1 (de) 1996-02-07 1997-01-30 Gasspülboden für metallurgische gefässe

Country Status (13)

Country Link
US (1) US6129889A (cs)
EP (1) EP0894033B1 (cs)
JP (1) JP2000504780A (cs)
KR (1) KR19990082319A (cs)
AT (1) ATE189980T1 (cs)
AU (1) AU1597397A (cs)
CA (1) CA2245668C (cs)
CZ (1) CZ289796B6 (cs)
DE (2) DE19604413C1 (cs)
DK (1) DK0894033T3 (cs)
ES (1) ES2146077T3 (cs)
SK (1) SK105398A3 (cs)
WO (1) WO1997028915A1 (cs)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3126122B1 (ja) * 1999-08-19 2001-01-22 東京窯業株式会社 ガス吹き込み用プラグ及びその製作方法
CN102554157A (zh) * 2010-12-21 2012-07-11 湖南晟通科技集团有限公司 将惰性气体通入铸嘴的方法及铸嘴夹具
EP3023173B9 (de) * 2014-09-29 2018-12-12 Refractory Intellectual Property GmbH & Co. KG Befestigungsvorrichtung für einen zylinderförmigen keramischen Hohlkörper und feuerfester keramischer Gasspülstein mit einer solchen Befestigungsvorrichtung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2495187A1 (fr) * 1980-12-02 1982-06-04 Siderurgie Fse Inst Rech Procede de realisation de fonds de recipients metallurgiques
DE3145538C2 (de) * 1981-11-17 1987-03-12 ESB Schweißbetrieb Burbach & Bender oHG, 5900 Siegen Verfahren und Vorrichtung zum Behandeln von Metallschmelzen mit Spülgas
US4836433A (en) * 1988-05-13 1989-06-06 Insul Company, Inc. Device for introducing stirring gas into molten metal in metered amount
FR2632971B1 (fr) * 1988-06-17 1993-09-03 Vallourec Procede de traitement des aciers liquides par injection de gaz a travers le fond de poche
EP0560834B1 (de) * 1990-12-07 1994-08-17 Veitsch-Radex Aktiengesellschaft Für Feuerfeste Erzeugnisse Boden- oder wandausbildung für ein metallurgisches gefäss
US5225143A (en) * 1991-02-01 1993-07-06 Insul Company, Inc. Device for directional gas distribution into molten metal
US5423521A (en) * 1992-05-19 1995-06-13 Quigley Company, Inc. Ceramic plug gas distribution device
DE4312988A1 (de) * 1993-04-21 1994-10-27 Didier Werke Ag Feuerfestes, keramisches Formteil und Herstellungsverfahren

Also Published As

Publication number Publication date
SK105398A3 (en) 1999-05-07
CZ244198A3 (cs) 1999-06-16
CZ289796B6 (cs) 2002-04-17
DE59701178D1 (de) 2000-04-06
CA2245668A1 (en) 1997-08-14
US6129889A (en) 2000-10-10
JP2000504780A (ja) 2000-04-18
KR19990082319A (ko) 1999-11-25
WO1997028915A1 (de) 1997-08-14
AU1597397A (en) 1997-08-28
ATE189980T1 (de) 2000-03-15
CA2245668C (en) 2004-12-07
EP0894033A1 (de) 1999-02-03
DK0894033T3 (da) 2000-07-31
DE19604413C1 (de) 1997-05-28
ES2146077T3 (es) 2000-07-16

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