EP1097246B1 - Verfahren und vorrichtung zum abdichten einer abstichöffnung in metallurgischen gefässen - Google Patents

Verfahren und vorrichtung zum abdichten einer abstichöffnung in metallurgischen gefässen Download PDF

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Publication number
EP1097246B1
EP1097246B1 EP99929165A EP99929165A EP1097246B1 EP 1097246 B1 EP1097246 B1 EP 1097246B1 EP 99929165 A EP99929165 A EP 99929165A EP 99929165 A EP99929165 A EP 99929165A EP 1097246 B1 EP1097246 B1 EP 1097246B1
Authority
EP
European Patent Office
Prior art keywords
fact
stopper
tap opening
covering
tube
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
EP99929165A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1097246A1 (de
Inventor
Fritz-Peter Pleschiutschnigg
Wei-Ping Wu
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.)
SMS Siemag AG
Original Assignee
SMS Schloemann Siemag AG
Schloemann Siemag AG
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 SMS Schloemann Siemag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Publication of EP1097246A1 publication Critical patent/EP1097246A1/de
Application granted granted Critical
Publication of EP1097246B1 publication Critical patent/EP1097246B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F27D3/15—Tapping equipment; Equipment for removing or retaining slag
    • F27D3/1509—Tapping equipment
    • F27D3/1536—Devices for plugging tap holes, e.g. plugs stoppers
    • 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
    • C21C5/4653—Tapholes; Opening or plugging 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
    • B22D41/44—Consumable closure means, i.e. closure means being used only once
    • B22D41/46—Refractory plugging masses
    • 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
    • F27D3/15—Tapping equipment; Equipment for removing or retaining slag
    • F27D3/1545—Equipment for removing or retaining slag
    • F27D3/159—Equipment for removing or retaining slag for retaining slag during the pouring of the metal or retaining metal during the pouring of the slag

Definitions

  • the invention relates to a method and a device for sealing a tap opening in metallurgical vessels.
  • tapping systems are known from the prior art.
  • the electric arc furnace is tapped, for example, from the side Tilt the furnace vessel.
  • the furnace is tilted to the rack side for tapping, after reaching the desired tapping weight, the outflow of the melt ended by a quick tilt back.
  • slag partially runs out of the tap hole with the melt jet.
  • the tapping opening is opened for one Another batch prepared by closing the opening with a closing plate and sand is poured into this opening.
  • the sand filling process is either carried out manually or by a mechanical conveyor system. Optimal filling opening with sand is not possible with the manual filling process. It can also this step, if cleaning work needs to be carried out, is time consuming and labor intensive his.
  • the so-called AMEPA system has become known for racking in pans.
  • This system is mainly used to control the tapping from the pan into the Distributor of a continuous caster used. It is a racking system according to the electromagnetic principle.
  • the termination of the racking and the Separation process between the melt and slag is achieved via a sensor that is installed on the pan spout.
  • JP-A-58 031 018 describes a control system which is dependent on the weight of the tapped melt for a stopper which can be moved from above through the melt into a tapping opening.
  • WO-A-9 718 050 describes a closing plate which can be brought up to the tap opening from below from the outside of the vessel and which is present in addition to a stopper acting from above.
  • EP 0 315 311 B1 describes a stopper for closing tapping openings known in metallurgical vessels.
  • This plug consists of one cylindrical shaped container made of metal with two plates at its ends is provided. In this case, the end of the Container and the corresponding inner plate with a gap spaced apart arranged.
  • the metallic container takes refractory material, such as Sand, on. This sand is surrounded by a plastic sheet.
  • the stopper is provided with a plunger, which is used to place the plug in the hole the outer plate against the inner plate along a rod guide, which penetrates the sand mass is moved. This will make the plastic sheet torn. This process is supported by a serrated edge of the container. The sand emerges from the gap and into the gap between the container and the tap hole and thus creates a sealing connection. The plunger is then turned off while the metallic container is in the tap hole remains.
  • the present invention is therefore based on the object, a method and to create a racking system with which a slag-free racking is easy and inexpensive can be carried out in a metallurgical vessel and thus with steels high purity can be produced.
  • the essence of the invention is the creation of a tapping plug system with which the tapping opening of a metallurgical vessel can be optimally sealed. This is achieved according to the device by a special design of the stopper. According to the method, it is proposed to insert the stopper into the tap opening to control, for example, depending on the weight of the tapped Steel, the bathroom mirror or via a slag detection system. There are preferably automatic, but also semi-automatic or manual controls possible. The time of introduction can be controlled selectively or, for example via a signal which is via a visual scanning via a screen indicator is determined.
  • the stopper according to the invention consists of a stopper casing which is flowable Fabric that picks up.
  • This filled plug casing is made of the liquid metal or introduced into the tap opening from outside the metallurgical vessel. Subsequently the tap opening is closed, for example, by means of a closing plate.
  • the invention takes advantage of the fact that the material of the plug casing with regard to its consistency and / or its shape due to the influence of temperature changes that the flowable material spreads sealingly in the tap opening can.
  • the material of the plug casing is preferably one temperature insulating material, for example cardboard or wood.
  • the flowable material is preferably filling sand. This replicates the disintegration of the shell at the contact area with the molten metal, the tapping opening sealing sintered layer. This means an additional sealing effect. Since the amount of filling sand is dosed in the stopper casing and depending on Wear of the tap hole can be varied, the tap hole with a optimal amount of sand can be sealed. It is thus avoided that the sand not completely filling the hole for sealing. Thus, problems with opening bypassed the tap hole.
  • the insertion means for the plug casing are preferably a metal rod or a metal tube that can be moved through the melt to the tap opening are.
  • the metal rod or the metal tube advantageously consists of links, which allow them to be moved out of the horizontal using an arcuate guide to move the vertical.
  • This protective tube also consists of one opposite the molten metal is only resistant for a short time. Preferably acts This material for the plug casing and the protective tube is cardboard, which coked in the molten metal. It is also all other types of materials conceivable, the consistency due to the temperature influence of the molten metal change, which includes total dissolution, or change their shape, by losing firmness.
  • the filling sand absorbed by the casing can contain binders which are at temperatures disintegrate at the level of the molten metal. It is also conceivable that the Filling sand within the casing is surrounded by an intermediate protective layer and vacuum-sealed is. This intermediate protective layer is advantageously a film, that dissolves at the given temperatures.
  • a support plate lies on top of the filling sand.
  • Rod or tube press the filling sand further down.
  • Another embodiment of the invention provides that in addition to the plug casing as the first chamber for receiving filler the cavity of the protective tube as second chamber is used.
  • This second chamber serves as a storage chamber for filler.
  • the second chamber is filled with filler in particular when the The tap hole diameter has increased due to wear is.
  • this second chamber is located between the axially through the Protective tube feasible rod and the inner surface of the protective tube. The amount the filler in this second chamber can be selected as required. If if the insertion means is a tube, it penetrates with it surrounding protective tube the first chamber. The second chamber is in the cavity of the insertion tube formed inside and above the first chamber.
  • a Grafting preferably made of ceramic, is provided. To protect the filler when The chambers as well as the stopper pass through the hot melt surrounding the temperature-insulating plug casing. This grafting is due to a Pressurization can be moved through the rod or tube. Through the movement the plug is moved, the cover torn on the bottom, and filler comes out.
  • the proposed method and the plug show the advantage of a slag-free Tapping.
  • the secondary metallurgical Treatment especially with regard to the current requirement after "Clean Steel", significantly simplified.
  • the uncontrollable aluminum erosion is prevented by the accompanying slag.
  • the invention brings about a saving the deoxidizing agent, the winding wires such as CaSi and the synthetic Slag. Furthermore, favorable conditions for desulfurization and degassing created The casting properties are improved.
  • Figure 1 shows a partial enlargement of the plug 1 of the tapping system during the immersion process into the tap hole 2 in the bottom 3 of an electric furnace 4.
  • 6 denotes the lighter slag.
  • the stopper 1 comprises a casing 7 and a core 8 of filling sand, which of the Shell 7 is surrounded as a protective jacket.
  • the plug 1 by means of a metal rod 9 into the tap opening 2 via a lifting system 10 from the interior of the vessel coming in.
  • the metal rod 9 acts on the filling sand 8 via a support grid 11.
  • a graft 12 forms the end of the filling sand core 8 to the bottom region of the plug casing.
  • the diameter of the plug corresponds at least approximately to the diameter of the Tap hole 2 at its lower end.
  • a protective tube 13 This tube can be formed as a whole with the casing 7 of the stopper or attached to this.
  • the protective tube 13 forms in combination with the shell 7 the outer casing for the metal rod 9 and the filling sand core 8.
  • the protective tube 13 can be made of the same material as the cover of the plug. According to the invention, this is a material that influences the temperature the melt can only withstand for a certain time.
  • the one described here The shape of the cover is made of cardboard, which cokes due to the high temperatures.
  • the immersion step of the stopper 1 in the tap opening 2 by means of the Metal rod 9 presses this onto the support grid 11, which then continues on the sand core 8 acts, which is supported by the plug 12.
  • the filling sand also vacuum-sealed by means of an intermediate protective film (not shown) that dissolves at the existing temperatures.
  • the tap opening 2 is from the outside of the closed metallurgical vessel.
  • This closed state shows Figure 2.
  • the closure means is a closing plate 14. It can also be any other type of conventional closure means. After the closing process the metal rod 9 by automatically releasing a clamping device (not shown) separated and withdrawn through the interior of the vessel.
  • FIG. 1 The plug casing 7, consisting of cardboard, coked (15).
  • the metal pillar from remaining melt and slag presses the flowable sand, which is no longer is stabilized by a cover, down and to the side. This spreads the Sealing sand in the tap hole.
  • the Material of the protective tube 13 has completely dissolved.
  • This sintered layer 16 means an additional sealing layer. After forming this seal, the furnace can be scraped again for the next one Batch to be infested.
  • FIGs 4 and 5 show an embodiment of the tapping system according to the invention using the example of an electric furnace during a racking ( Figure 4) and at the tapping end (Figure 5).
  • a section of an electric furnace 4 is shown.
  • the closing plate is used for tapping the furnace 4 which cannot be tilted in the embodiment 14 pushed back below the tap hole 2.
  • the one in the tap hole 2 located sand runs out, and the molten steel 5 is in a Pan 17 filled.
  • the electric oven is sufficient Swamp driven so that when tapping a sufficient bath height above the tap opening is present and there are no vortices that cause unwanted running the slag could cause.
  • the oven 4 is relatively lower Oriel or with a tap hole directly in the stove or with a large one Swamp.
  • the weight of the tapped melt is determined by means of a weighing device 18 measured.
  • the weighing device is a weighing cell located below the pan 17 are arranged in the trolley 19.
  • the current weight will be detected by measuring signals from a measuring system 20 and into a data processing system 21 fed.
  • a lifting device 10 which is controlled by means of a plug control system 22, vertically through the interior of the vessel is moved in order to close the tap opening 2 with the stopper 1.
  • a lifting device is advantageously the extreme operating conditions customized.
  • this lifting device can be arranged on the furnace vessel or on the tilting platform.
  • a known one Early slag detection system may be provided. This is on the data processing system 21 and the plug control system 22 connected. Even if the desired molten steel weight has not yet been reached, the plug is inserted into the The tap opening is driven as soon as slag has been detected.
  • the rapid reaction of the tapping system according to the invention makes it possible to prevent slag from leaking.
  • Figure 6 shows a first embodiment of the plug according to the two-chamber system.
  • the components which correspond to FIGS. 1 to 3 are corresponding Provide reference numbers.
  • Figures 6 and 7 do not show the initial state of the stopper, but the state of insertion into the tap hole.
  • the stopper In the initial state the stopper is made from a cardboard-covered first chamber and a second chamber, which is also covered with cardboard.
  • the floor the first chamber is detachably closed with a plug that is inside of the protective covering.
  • the first chamber is designated 123, the second chamber 124.
  • the second chamber extends between the inner surface of the plug casing 7 of the first chamber 123 adjacent protective tube 113 and the outer surface of the metal rod 109.
  • the plug is used to empty the chamber system 112 by pressurizing rod 109 from the bottom of the first chamber detached and undergoes a pushing movement towards the outside of the vessel. in this connection the bottom wrapper tears (no longer shown) and filler sand 125 emerges. It is also conceivable that the plug by contact with the axially movable rod is proceeding steadily.
  • the diameter of the plug is in the two-chamber system dimensioned so that a leadership within the narrowing Tapping is possible.
  • the metal rod is through a hollow tube 226 replaced.
  • the protective tube 213 receives this tube 226 and penetrates the Top of the chamber 223 covering part of the plug casing 7 and thus the first Chamber 223.
  • the second chamber 224 is in the cavity of the insertion tube 226 educated.
  • the plug 212 an impact movement and tears the bottom-side wrapping (not more shown).
  • Filling sand 225 emerges. If the stopper is caused by a contact movement is moved, a back process is for the discharge of the filling sand from the second chamber of the tube 213 necessary.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Closures For Containers (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
EP99929165A 1998-06-12 1999-06-10 Verfahren und vorrichtung zum abdichten einer abstichöffnung in metallurgischen gefässen Expired - Lifetime EP1097246B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19826085A DE19826085C2 (de) 1998-06-12 1998-06-12 Verfahren und Vorrichtung zum Abdichten einer Abstichöffnung in metallurgischen Gefäßen
DE19826085 1998-06-12
PCT/EP1999/003993 WO1999066082A1 (de) 1998-06-12 1999-06-10 Verfahren und vorrichtung zum abdichten einer abstichöffnung in metallurgischen gefässen

Publications (2)

Publication Number Publication Date
EP1097246A1 EP1097246A1 (de) 2001-05-09
EP1097246B1 true EP1097246B1 (de) 2003-03-26

Family

ID=7870617

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99929165A Expired - Lifetime EP1097246B1 (de) 1998-06-12 1999-06-10 Verfahren und vorrichtung zum abdichten einer abstichöffnung in metallurgischen gefässen

Country Status (19)

Country Link
US (1) US6471911B1 (xx)
EP (1) EP1097246B1 (xx)
JP (1) JP2002518183A (xx)
KR (1) KR20010052670A (xx)
CN (1) CN1305535A (xx)
AR (1) AR019619A1 (xx)
AT (1) ATE235565T1 (xx)
BR (1) BR9911153A (xx)
CA (1) CA2334963A1 (xx)
CZ (1) CZ20004642A3 (xx)
DE (2) DE19826085C2 (xx)
EG (1) EG22341A (xx)
HU (1) HUP0102223A3 (xx)
MX (1) MXPA00012305A (xx)
PL (1) PL344747A1 (xx)
SK (1) SK18782000A3 (xx)
TW (1) TW436524B (xx)
WO (1) WO1999066082A1 (xx)
ZA (1) ZA200007133B (xx)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10111273A1 (de) * 2001-03-09 2002-09-12 Sms Demag Ag Verfahren und Einrichtung zum Auswechseln einer Schieberbaugruppe an einem metallurgischen Gefäß, insbesondere an einem Elektroschmelzofen
DE10111275A1 (de) * 2001-03-09 2002-09-12 Sms Demag Ag Verfahren und Vorrichtung zum Stichlochstopfen und/oder Stichlochbohren an einem metallurgischen Gefäß, insbesondere an einem Elektroschmelzofen
TW574495B (en) 2001-09-26 2004-02-01 Sms Demag Ag Arc furnace and method for operating the arc furnace
US7704444B2 (en) * 2005-06-29 2010-04-27 Process Technology International, Inc. Method and apparatus for testing characteristics of a furnace melt
US7704445B2 (en) * 2005-06-29 2010-04-27 Process Technology International, Inc. Systems and methods for accessing a furnace melt
US8277721B2 (en) * 2005-06-29 2012-10-02 Process Technology International, Inc. Systems and methods for accessing a furnace melt
US8210402B2 (en) * 2009-02-09 2012-07-03 Ajf, Inc. Slag control shape device with L-shape loading bracket
US8062577B2 (en) 2009-04-10 2011-11-22 Edw. C. Levy Co. Alumina taphole fill material and method for manufacturing
WO2011009579A1 (de) * 2009-07-20 2011-01-27 Fuchs Technology Holding Ag Abdicht- und verfüllvorrichtung für einen metallurgischen ofen, metallurgischer ofen und verfahren zum abstechen eines metallurgischen ofens
WO2012040558A2 (en) * 2010-09-23 2012-03-29 Gillespie + Powers, Inc. Furnace tap hole flow control and tapper system and method of using the same
CN103353232B (zh) * 2013-07-26 2015-01-21 朱兴发 电磁矿渣熔炉左轮弹盒式多孔下拉塞石墨质水口装置
CN108127110B (zh) * 2017-02-28 2023-06-09 安徽工业大学 一种可保护出钢的钢水转运装置及可保护出钢的电炉炼钢系统
CN111942766B (zh) * 2020-07-23 2022-05-20 生态环境部华南环境科学研究所 一种垃圾自动收集装置及其系统
CN111944942B (zh) * 2020-07-30 2022-04-22 北京科技大学 一种转炉偏心炉底动态出钢控制方法及装置
IT202100008438A1 (it) * 2021-04-15 2022-10-15 Nico Busolini Apparato e metodo per l'introduzione di sabbia cromite nello scaricatore di una siviera
CN113549728B (zh) * 2021-07-13 2022-07-22 鞍钢股份有限公司 一种防止转炉下渣及缩短出钢时间的装置及使用方法
CN115007845B (zh) * 2022-06-15 2024-03-15 攀钢集团攀枝花钢铁研究院有限公司 一种高洁净钢生产过程引流砂填充方法
WO2024137597A1 (en) * 2022-12-21 2024-06-27 Novelis Inc. Systems and methods for controlling molten metal discharge from a furnace

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SE413074B (sv) 1976-10-25 1980-04-14 Asea Ab Forfarande for metning av resistiva spenningsfall vid tappstellen fran metallurgiska behallare
FR2472959A1 (fr) * 1980-01-04 1981-07-10 Daussan & Co Dispositif pour empecher la solidification du metal dans les orifices de coulee d'un recipient metallurgique
GB2091396B (en) * 1981-01-17 1985-02-27 London Scandinavian Metall Thermally-degradable taphole plug
JPS5831019A (ja) * 1981-08-15 1983-02-23 Nisshin Steel Co Ltd 溶湯容器におけるスラグ検出方法
JPS5831018A (ja) * 1981-08-15 1983-02-23 Nisshin Steel Co Ltd 溶湯容器に用いるスラグカツト方法
US4399986A (en) * 1981-12-14 1983-08-23 Collins William J Device for plugging a taphole in a furnace
DE3327671C2 (de) * 1983-07-30 1986-06-05 Mannesmann AG, 4000 Düsseldorf Einrichtung zum weitestgehend schlackenfreien Abstechen von Metalschmelzen, insbesondere von Stahlschmelzen, aus metallurgischen Gefäßen
US4715585A (en) * 1985-09-09 1987-12-29 Joseph Simko Method and apparatus for forming ladle well blocks
US4828226A (en) * 1987-10-16 1989-05-09 Foseco International Limited Tap hole plugs for metallurgical vessels
NZ280990A (en) * 1995-02-16 1997-11-24 Laporte Group Australia Ltd Casting ladle device; apparatus and method for inserting sand into the nozzle and base portions of a ladle, elongate tool introduces sand filled container via nozzle orifice
DE19543058C2 (de) * 1995-11-10 2001-01-04 Sms Demag Ag Verfahren und Vorrichtung zum Verschließen einer Abstichöffnung

Also Published As

Publication number Publication date
PL344747A1 (en) 2001-11-19
DE59904754D1 (de) 2003-04-30
EG22341A (en) 2002-12-31
CN1305535A (zh) 2001-07-25
KR20010052670A (ko) 2001-06-25
CA2334963A1 (en) 1999-12-23
EP1097246A1 (de) 2001-05-09
BR9911153A (pt) 2003-01-14
HUP0102223A3 (en) 2001-11-28
DE19826085C2 (de) 2000-08-03
JP2002518183A (ja) 2002-06-25
HUP0102223A2 (hu) 2001-10-28
SK18782000A3 (sk) 2001-08-06
MXPA00012305A (es) 2005-07-25
CZ20004642A3 (cs) 2001-09-12
AR019619A1 (es) 2002-02-27
DE19826085A1 (de) 1999-12-23
ZA200007133B (en) 2001-07-13
ATE235565T1 (de) 2003-04-15
US6471911B1 (en) 2002-10-29
TW436524B (en) 2001-05-28
WO1999066082A1 (de) 1999-12-23

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