EP3546599A1 - Pneumatischer schlackenstopper - Google Patents

Pneumatischer schlackenstopper Download PDF

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Publication number
EP3546599A1
EP3546599A1 EP18164879.1A EP18164879A EP3546599A1 EP 3546599 A1 EP3546599 A1 EP 3546599A1 EP 18164879 A EP18164879 A EP 18164879A EP 3546599 A1 EP3546599 A1 EP 3546599A1
Authority
EP
European Patent Office
Prior art keywords
gas outlet
gas
channel
taphole
outlet opening
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Withdrawn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
EP18164879.1A
Other languages
German (de)
English (en)
French (fr)
Inventor
Johannes Rosner
Paul Georg Oberhumer
Bernhard VORABERGER
Erich Stefan Wimmer
Dzevad Smajic
Dominik Straßer
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.)
Primetals Technologies Austria GmbH
Original Assignee
Primetals Technologies Austria 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 Primetals Technologies Austria GmbH filed Critical Primetals Technologies Austria GmbH
Priority to EP18164879.1A priority Critical patent/EP3546599A1/de
Priority to EP19712236.9A priority patent/EP3775294A1/de
Priority to KR1020207027575A priority patent/KR20200138233A/ko
Priority to PCT/EP2019/057741 priority patent/WO2019185728A1/de
Priority to JP2020552323A priority patent/JP7071530B2/ja
Priority to CN201980023897.0A priority patent/CN111902548A/zh
Publication of EP3546599A1 publication Critical patent/EP3546599A1/de
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/14—Discharging devices, e.g. for slag
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/21—Arrangements of devices for discharging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/19—Arrangements of devices for discharging
    • 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

Definitions

  • the application relates to a pneumatic slag stopper for the pneumatic closing of a taphole channel of a metallurgical vessel with respect to the discharge of slag by means of at least one gas stream introduced into the taphole channel from at least one gas outlet opening, and a method for the pneumatic closing of a taphole channel.
  • liquid slags which have a lower density than the liquid metal products, are formed in addition to liquid metal products.
  • slag may be entrained. This is undesirable, it is desired as complete as possible separation of slag and metal product.
  • Such a method is based for example on pneumatic closing of the taphole channel by blowing gas. Such a method is for example in DE2639712 described.
  • a pneumatic slag stopper for pneumatic closing of a Taphole channel of a metallurgical vessel with respect to the discharge of slag by means of at least one from at least one gas outlet opening introduced into the taphole channel Gas stream, wherein the gas outlet opening is attached to a pivot arm, which is pivotable about a pivot axis by means of a pivot drive, and the pivot arm has a gas supply channel opening into the at least one gas outlet opening, which is characterized that the longitudinal axis of the at least one gas outlet opening is substantially parallel to the pivot axis.
  • the pneumatic slag stopper closes the taphole channel of a metallurgical vessel with respect to the discharge of slag.
  • a gas stream is introduced into the taphole channel.
  • the gas flows from at least one gas outlet opening counter to the flow direction of the slag or a slag entraining stream of molten metal in the taphole channel and thereby closes it practically with respect to the discharge of slag.
  • the taphole channel passes through the wall of the metallurgical vessel. Through the taphole channel, the molten metal is discharged from the metallurgical vessel.
  • the taphole channel terminates at the outside of the metallurgical vessel with the taphole.
  • the tap hole consists in the so-called Abstichlochbrille, a perpendicular to the longitudinal axis of the taphole channel plate.
  • the metallurgical vessel is for example a steelworks converter, for example for a BOF or an LD process.
  • the gas outlet opening is attached to a pivot arm, since it should be positioned in front of the tap hole only when slag leakage threatens. Until then, she should be in a different position. When the time comes, she should be able to be positioned quickly in front of the tap hole. This is achieved in that it is mounted on a pivot arm which is pivotable about a pivot axis by means of a pivot drive.
  • the swivel arm has a gas supply channel opening into the at least one gas outlet opening. Through this gas supply channel is the pneumatic closing necessary gas supplied to the gas outlet.
  • the guide in the swivel arm makes it compact and easy to build.
  • the longitudinal axis of the gas outlet opening is largely parallel to the pivot axis. Being largely parallel includes both parallel and deviation from parallelism up to a deviation of +/- 5 °, such minor deviations from parallelism may result in operation without restricting operability to an unacceptable extent. Deviation of +/- 5 ° refers to an angle between the longitudinal axis of the gas outlet opening and the pivot axis in a plane containing both axes, if they were arranged to intersect parallel shifts.
  • the distance of the gas outlet opening of the pivot axis is adjustable.
  • a component of a certain length serving as a swivel arm, which is connected to the swivel drive can be adjusted to different positions with respect to the axis of rotation.
  • the adjustment of the gas outlet opening with respect to the taphole - for example after replacement of the taphole channel - facilitates, as well as installation on the metallurgical vessel and maintenance of the slag stopper made less expensive.
  • the entire slag stopper must be adjusted with housing on the metallurgical vessel, which is much more complex.
  • the slag stopper according to the invention thus offers comparatively reduced assembly times and costs.
  • the swivel arm is pivotable from a home position to a maximum swivel angle.
  • the maximum swing angle is adjustable. This can for example be done by the rotary drive an adjustable stop element is mounted to limit the pivoting movement. As a result, the adjustment of the gas outlet opening is facilitated with respect to the tap hole, which makes installation on the metallurgical vessel, maintenance and replacement of the slag stopper less expensive.
  • a plurality of gas outlet openings are present. This may have advantages in terms of the flow behavior of the gas stream after leaving the slag stopper. With pneumatic closing of a taphole channel, the better the results of inhibiting the discharge of slag, the better it is possible to introduce the gas flow coaxially with the longitudinal axis of the taphole channel into the taphole. If a plurality of gas outlet openings are provided, they may have comparatively smaller cross-sections with the same overall cross-sectional area as a single, larger gas outlet opening. In very tight spaces, the feasible length for gas outlet openings can be very short.
  • the gas outlet opening or the gas outlet openings are designed as a gas channel or as gas channels in a nozzle head element which can be inserted into the swivel arm or into the gas outlet module. This makes it possible, if appropriate, to use different geometries of the gas outlet openings in a simple manner or to react to changed boundary conditions of the problem to be solved, or to carry out wear-related replacement.
  • the position of the nozzle head element is adjustable by means of adjusting elements.
  • the adjustment can be, for example, screws.
  • the position of the pivot arm which is provided for pneumatically closing a taphole channel of a metallurgical vessel with respect to the discharge of slag, may also be called the seal position.
  • the pivot axis passes through a pivot shaft.
  • the slag stopper is provided with a gas source line for supplying the gas supply channel with gas.
  • the gas source conduit is valveless connected to the gas supply channel at least via a connecting channel arranged eccentrically in the pivot shaft only in the sealing position.
  • further connection channels may be present outside the pivot shaft to introduce the gas from the connecting channel in the pivot shaft in the gas supply channel.
  • a valveless design reduces susceptibility to failure and maintenance.
  • a plurality of gas outlets are provided in the vicinity of the at least one gas outlet opening in the swivel arm, preferably in the gas outlet module.
  • the gas outlets are arranged away from the region in which the gas outlet opening or the gas outlet openings are arranged. Under the environment is the area of the swivel arm or the gas outlet module to understand that is in sealing position in front of the taphole glasses.
  • the gas outlets emit gas, which is supplied, for example, through the gas supply channel when the gas outlets open into the gas supply channel.
  • gas outlets By the gas outlets emit gas, which is supplied, for example, through the gas supply channel when the gas outlets open into the gas supply channel.
  • the fact that the surface is reduced by the gas outlets a freezing of molten metal or slag is difficult.
  • running out of gas gas freezing of molten metal or slag is difficult.
  • the gas outlets thus contribute to reducing the above-mentioned problems.
  • the rotary actuator is gearless. This reduces manufacturing costs, susceptibility to failure and maintenance under the extreme environmental conditions that a slag stopper attached to a metallurgical vessel has to endure.
  • the pivot drive comprises at least one crankshaft and at least one pneumatic cylinder for driving the crankshaft. This reduces the susceptibility to failure and maintenance under the extreme environmental conditions that a slag stopper attached to a metallurgical vessel has to endure.
  • the rotary actuator is housed in a thermally insulated housing. This reduces the susceptibility to failure and maintenance under the extreme environmental conditions that a slag stopper attached to a metallurgical vessel has to endure. In particular, the life of a pneumatic cylinder is increased.
  • a further subject of the present application is a metallurgical vessel having a taphole channel and a slag stopper according to the invention attached to the metallurgical vessel, wherein the longitudinal axis of the taphole channel is substantially parallel to the pivot axis.
  • the slag stopper may be attached directly or indirectly to the metallurgical vessel. Preferably, it is releasably secured.
  • the attachment to the metallurgical vessel can be done, for example, indirectly via a console located on the metallurgical vessel.
  • consoles that are designed for slagstoppers AT408965B can also be used for the slag stopper according to the invention.
  • the slag stopper according to the invention can, of course, analogously to the teaching of AT408965B have a frame which carries the parts of the slag stopper, said frame carrying the parts of the slag stopper in turn releasably secured to the metallurgical vessel.
  • a further subject matter of the present application is a method for pneumatically closing a taphole channel of a metallurgical vessel with respect to the discharge of slag by means of a gas stream provided from at least one gas outlet opening, wherein the at least one gas outlet opening attached to a pivoting arm is positioned in a sealing position in front of the taphole of the taphole channel, characterized in that for this purpose the pivoting arm is pivoted with a pivoting movement into the sealing position in front of the taphole, wherein the pivoting movement takes place in a plane substantially perpendicular to the longitudinal axis of the taphole channel.
  • the pivot arm is pivoted in front of the tap hole, that the distance between the gas outlet opening and tap hole along the longitudinal axis of the taphole channel is reduced until reaching the sealing position.
  • the pivoting movement takes place in a plane in which the longitudinal axis of the taphole channel is located.
  • the gas outlet opening approaches the taphole in the direction of the longitudinal axis of the taphole channel practically from the front.
  • according to the invention is pivoted so that the pivoting movement takes place in a plane substantially perpendicular to the longitudinal axis of the taphole channel.
  • the gas outlet opening approaches the taphole or the longitudinal axis of the taphole channel practically from the side.
  • the gas outlet opening is positioned in front of the tap hole in the taphole glasses - ie outside the metallurgical vessel - for example, at a distance of 30 - 100 mm.
  • the gas outlet opening is oriented in the direction of taphole.
  • the longitudinal axis of the taphole channel and the longitudinal axis of the gas stream are preferably substantially coaxial.
  • For optimal pneumatic closing of a taphole channel is a central, with respect to the edges of the taphole symmetrical introduction of such gas flow important.
  • it is preferably positioned centrally in front of the taphole - the longitudinal axis of the taphole channel and the longitudinal axis of the gas outlet opening are substantially coaxial.
  • a gas flow emerging from the gas outlet opening, the longitudinal axis of which is essentially coaxial with the longitudinal axis of the gas outlet opening, will then also be substantially coaxial with the longitudinal axis of the taphole channel.
  • multiple gas exit openings are present, they are preferably positioned centrally in front of the taphole such that the gas flow is substantially coaxial with the longitudinal axis of the taphole channel. Since the pivot arm inevitably has to enter the flow of molten metal and / or slag flowing out of the taphole during the pivotal movement before the taphole channel can be pneumatically closed, the liquid material sprays in directions away from the longitudinal axis of the taphole channel. On splashed parts of the system splashes can freeze, one speaks of extenuations. Extensions also occur on the slag stopper and in the vicinity of the tap hole, for example on the taphole glasses.
  • the solid exacerbations can cause problems in positioning the gas exit aperture, for example, because they limit pivotal movement prior to reaching the intended seal position.
  • so-called trumpets are formed on the stitch hole from excrements that grow with conventional process control at each tapping process.
  • the risk that obstructions obstruct the scheduled positioning of the gas outlet reduced. This results from the fact that, for example, in a previous tapping partially trained trumpets are pushed away and knocked off in the lateral approach of the swing arm. The maintenance effort is thereby reduces and obstructive problems in pneumatic closing reduced.
  • FIGS. 1 and 2 show pneumatic closing of the taphole channel DE2639712 , From the metallurgical vessel 1, in this case a steelworks converter, metal melt 2 flows through the taphole channel 3 during tapping.
  • the Tap hole 4 is in the taphole glasses 5. Shown is a starting position, because slag 6 does not come out yet.
  • a pivot arm 7 On a pivot arm 7, a gas outlet opening 8 is attached.
  • the pivot arm 7 is pivotable about a pivot axis 9 by means of a pivot drive 10.
  • the longitudinal axis 11 of the gas outlet opening 8 in the plane of the paper is perpendicular to the pivot axis 9.
  • FIG. 2 a sealing position is shown, which was taken by means of pivot drive 10.
  • the longitudinal axis 11 of the gas outlet opening 8 in the plane of the paper is coaxial with the longitudinal axis of the taphole channel 3.
  • the gas outlet opening 8 is located in the taphole 4 in the taphole glasses 5. From the gas outlet opening 8 flows to the pneumatic closing gas in the taphole channel 3, represented by an arrow. This gas stream also tears air through the annular gap 12 around the centrally located in the tap hole 4 gas outlet opening 3, represented by arrows.
  • FIG. 3 shows a pneumatic slag stopper according to the invention.
  • the pivot arm 13 has at its end a gas outlet opening. Not shown is a running in the pivot arm 13 gas supply channel.
  • the indicated longitudinal axis 14 of the gas outlet opening is parallel to the pivot axis 15.
  • the pivot drive is disposed within the housing 16 and not shown separately.
  • the housing 16 may be thermally insulated.
  • FIG. 4 shows another view of the in FIG. 3 presented facts.
  • FIGS. 3 and 4 Also shown is a taphole gland 17 with taphole of a metallurgical vessel to which the slag stopper of the invention is attached.
  • the longitudinal axis 18 of the taphole channel behind the taphole is substantially parallel to the pivot axis 15th
  • FIG. 5 shows schematically in sectional view the ratio of the longitudinal axis 20 of a gas outlet opening 19 in one Swing arm 21 to the pivot axis 22.
  • a gas supply channel 23 which opens into the gas outlet opening 19 extends.
  • FIGS. 3 and 4 the slag stopper is in a starting position.
  • FIG. 6 shows him in an analogous representation in a sealing position after it has been pivoted in a plane substantially perpendicular to the longitudinal axis 18 of the tap hole 24. In the sealing position, the gas outlet opening is positioned in front of the taphole 24.
  • FIG. 7 schematically shows in sectional view a portion of a pivot arm 25, which comprises an arm module 26 and a gas outlet module 27 which is releasably attached to the arm module 26.
  • FIG. 8 schematically shows a sectional view of an inserted into the gas outlet module 28 nozzle head element 29 with a plurality of gas channels 30a, 30b, 30c as gas outlet openings. Further gas outlet openings in the nozzle head element 29 are indicated, but not provided with reference numerals. In the vicinity of the gas outlet openings optional gas outlets 31a, 31b, 31c are shown; Further gas outlets in the nozzle head element 29 are indicated, but not provided with reference numerals.
  • FIG. 9a schematically shows how in the sealing position, a gas source conduit 32 valveless via a eccentric to the pivot axis 33 arranged connecting channel 34 in the pivot shaft 35 is connected to the gas supply channel 36 in the pivot arm 37.
  • FIG. 9b shows schematically how in one compared to FIG. 9a about 135 ° gifted position of the connecting channel no longer communicates with the gas supply channel 36.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
EP18164879.1A 2018-03-29 2018-03-29 Pneumatischer schlackenstopper Withdrawn EP3546599A1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP18164879.1A EP3546599A1 (de) 2018-03-29 2018-03-29 Pneumatischer schlackenstopper
EP19712236.9A EP3775294A1 (de) 2018-03-29 2019-03-27 Pneumatischer schlackenstopper
KR1020207027575A KR20200138233A (ko) 2018-03-29 2019-03-27 공압 슬래그 스토퍼
PCT/EP2019/057741 WO2019185728A1 (de) 2018-03-29 2019-03-27 Pneumatischer schlackenstopper
JP2020552323A JP7071530B2 (ja) 2018-03-29 2019-03-27 空気圧式スラグストッパ
CN201980023897.0A CN111902548A (zh) 2018-03-29 2019-03-27 气动的挡渣器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18164879.1A EP3546599A1 (de) 2018-03-29 2018-03-29 Pneumatischer schlackenstopper

Publications (1)

Publication Number Publication Date
EP3546599A1 true EP3546599A1 (de) 2019-10-02

Family

ID=61868205

Family Applications (2)

Application Number Title Priority Date Filing Date
EP18164879.1A Withdrawn EP3546599A1 (de) 2018-03-29 2018-03-29 Pneumatischer schlackenstopper
EP19712236.9A Pending EP3775294A1 (de) 2018-03-29 2019-03-27 Pneumatischer schlackenstopper

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP19712236.9A Pending EP3775294A1 (de) 2018-03-29 2019-03-27 Pneumatischer schlackenstopper

Country Status (5)

Country Link
EP (2) EP3546599A1 (ja)
JP (1) JP7071530B2 (ja)
KR (1) KR20200138233A (ja)
CN (1) CN111902548A (ja)
WO (1) WO2019185728A1 (ja)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2639712A1 (de) 1975-12-17 1977-06-30 Voest Ag Verfahren und einrichtung zum verschliessen des stichloches eines metallurgischen gefaesses
DE3231316A1 (de) * 1982-08-23 1984-04-12 Leybold-Heraeus GmbH, 5000 Köln Verfahren und vorrichtung zur steuerung des abgiessens einer schmelze aus einem schmelzenbehaelter mit einer bodenoeffnung
AT408965B (de) 2000-01-27 2002-04-25 Voest Alpine Ind Anlagen Einrichtung zum verschliessen eines abstichloches eines metallurgischen gefässes

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
JPS5351139A (en) * 1976-10-20 1978-05-10 Kurosaki Refractories Co Flow control method of melt like molten metal
AT359535B (de) * 1978-10-24 1980-11-10 Voest Alpine Ag Einrichtung zum verschliessen des stichloches eines metallurgischen gefaesses
JPH0749356Y2 (ja) * 1992-06-08 1995-11-13 株式会社ニッコー 炉底出鋼口開閉装置
CN101282568B (zh) 2007-04-03 2012-10-10 中兴通讯股份有限公司 一种联合支持多种接入的系统
CN101381789B (zh) * 2008-08-15 2010-06-16 杭州浙大精益机电技术工程有限公司 转炉出钢挡渣装置
CN101993971B (zh) * 2009-08-27 2013-04-24 宝山钢铁股份有限公司 一种气流挡渣阀及其使用方法
CN202415582U (zh) * 2011-12-30 2012-09-05 宗品禾 高炉料面监控机
CN102899442A (zh) * 2012-08-15 2013-01-30 天津市三特电子有限公司 转炉出钢过程检测与控制装置
CN203007317U (zh) * 2012-12-11 2013-06-19 武汉榕盛科发冶金机械设备制造有限公司 吹沸式聚渣装置
JP5966970B2 (ja) 2013-02-27 2016-08-10 株式会社デンソー 燃料電池装置、および燃料電池システム
CN106834596A (zh) * 2016-12-15 2017-06-13 武汉钢铁股份有限公司 转炉出钢口全程挡渣装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2639712A1 (de) 1975-12-17 1977-06-30 Voest Ag Verfahren und einrichtung zum verschliessen des stichloches eines metallurgischen gefaesses
DE3231316A1 (de) * 1982-08-23 1984-04-12 Leybold-Heraeus GmbH, 5000 Köln Verfahren und vorrichtung zur steuerung des abgiessens einer schmelze aus einem schmelzenbehaelter mit einer bodenoeffnung
AT408965B (de) 2000-01-27 2002-04-25 Voest Alpine Ind Anlagen Einrichtung zum verschliessen eines abstichloches eines metallurgischen gefässes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SIMETAL VAICON STOPPER: "Metals Technologies", 31 December 2010 (2010-12-31), XP055479109, Retrieved from the Internet <URL:https://www.industry.siemens.com.cn/industrysolutions/cn/zh/metals/steelmaking/LDBOF_steelmaking/Documents/SIMETAL-Vaicon-Stopper-en.pdf> [retrieved on 20180529] *

Also Published As

Publication number Publication date
WO2019185728A1 (de) 2019-10-03
JP7071530B2 (ja) 2022-05-19
KR20200138233A (ko) 2020-12-09
CN111902548A (zh) 2020-11-06
JP2021516751A (ja) 2021-07-08
EP3775294A1 (de) 2021-02-17

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