WO2014023371A1 - Procédé pour faire fonctionner un système de lance de soufflage, et système de lance de soufflage lui-même - Google Patents

Procédé pour faire fonctionner un système de lance de soufflage, et système de lance de soufflage lui-même Download PDF

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Publication number
WO2014023371A1
WO2014023371A1 PCT/EP2013/001824 EP2013001824W WO2014023371A1 WO 2014023371 A1 WO2014023371 A1 WO 2014023371A1 EP 2013001824 W EP2013001824 W EP 2013001824W WO 2014023371 A1 WO2014023371 A1 WO 2014023371A1
Authority
WO
WIPO (PCT)
Prior art keywords
hot blast
lance
hot
closure
line
Prior art date
Application number
PCT/EP2013/001824
Other languages
German (de)
English (en)
Inventor
Christian GÜNTHER
Michael Wahl
Original Assignee
Saarstahl 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=48794030&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2014023371(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Saarstahl Ag filed Critical Saarstahl Ag
Priority to EP13737534.1A priority Critical patent/EP2882875B1/fr
Publication of WO2014023371A1 publication Critical patent/WO2014023371A1/fr

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
    • C21C5/4606—Lances or injectors
    • C21C5/462—Means for handling, e.g. adjusting, changing, coupling
    • 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
    • F27B3/22—Arrangements of air or gas supply devices
    • 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
    • F27B3/22—Arrangements of air or gas supply devices
    • F27B3/225—Oxygen blowing
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D2001/0079—Means to assemble at least two parts of a furnace or of any device or accessory associated to its use
    • F27D2001/0083—Means to assemble a moving part to a fixed one
    • F27D2001/0086—Means to assemble a moving part to a fixed one the moving part being in rotation

Definitions

  • the invention relates to a method for operating a Aufblaslanzenanordung (H constituwindlanzenanssen), in which hot blast is blown on a molten bath and / or a heap in a reaction vessel steelmaking, wherein the hot blast lance is fed via a hot blast line from a hot blast source, and a
  • freshness It is known in the steel industry to supply oxygen to the steel bath. This process is referred to as "fresh.”
  • the supply of oxygen can be done by bottom blowing and / or by blowing
  • Oxygen is supplied.
  • the oxygen is blown onto the steel bath by means of a water-cooled lance.
  • Pig iron and scrap used as feed are also produced in the direct reduction process so-called sponge iron in the form of DRI (Direct Reduced Iron) or HBI (Hot Briquetted Iron) can be used.
  • DRI Direct Reduced Iron
  • HBI Hot Briquetted Iron
  • Converter with oxidizing gases are burned. The resulting heat is transferred to the melt.
  • oxygen and / or fuels are supplied via floor jets.
  • Hot blast is understood to mean a heated oxygen-containing gas.
  • the gas is typically from the
  • Main components composed of oxygen, nitrogen and argon.
  • the oxygen content is in the range of normal air (21%) and can reach levels of up to 50%, preferably 35%, by enrichment with oxygen.
  • a hot blast but can also be understood a synthesis gas, for example, from the exhaust gases of a
  • Combustion reaction of a fuel such as blast furnace gas, coke gas, converter gas, natural gas or a gaseous or liquid hydrocarbon is obtained with air.
  • the 02 content of the synthesis gas can be determined by the air ratio of the combustion and a possibly.
  • Such a synthesis gas produced in addition to the above Components additionally contain C02 and water as combustion products.
  • the invention is therefore based on the object to further develop the method for operating a Clothingblaslanzenaniser, as well as a Aufblaslanzenanowski further to the effect that the
  • the invention is therefore based on the object to further develop the method for operating a
  • the object is in a method of the generic type according to the invention by the
  • the core of the inventive method is that the hot blast lance with the hot blast source is releasably connected, such that for each batch. between the batches the connection can be automatically released and closed again.
  • hot blast closure is thus meant an outwardly dense, hot blast passing connection between hot blast lance and hot blast line.
  • the positioning movement of the hot blast lance is now connected to the converter with the lowering movement to the hot blast closure. This happens at the same time, making the process very effective and easy.
  • the lance can be brought into a resting and / or waiting position.
  • the Aufblaslanze is movable in height and relative to the stationary hot blast line via a lance carriage, and the Aufblaslanze with the
  • Hot blast line the hot air cap with automatic adjustable recessed closing means connected and the
  • Renkendposition is automatically locked by means of a plurality of hydraulic furadleassulose. This is how the hot-air cap becomes automatic
  • Renkver gleich are, for example, the well-known
  • the retracted locking elements are additionally secured hydraulically. That
  • the mechanical closure is achieved as described above by the hydraulics, or possibly by motor or pneumatics.
  • the gas-tight connection of hot blast lance with is through the sealing air
  • hot blast Under hot blast, an at 500 ° C to 1400 ° C,
  • the gas is typically from the
  • Main components composed of oxygen, nitrogen and argon.
  • the oxygen content is in the range of normal air (21%) and can through
  • a hot blast could also be a synthesis gas, for example, from the exhaust gases of a combustion reaction of a fuel such as blast furnace gas, coke gas,
  • Converter gas or natural gas or other gaseous or liquid hydrocarbon is obtained with air.
  • the O 2 content of the synthesis gas can be adjusted by the air ratio of the combustion and a possibly simultaneous enrichment of the combustion air with oxygen and / or mixing of the combustion exhaust gases with pure oxygen.
  • hot blast generated from above indicates carbon dioxide and water as products of combustion.
  • Hot blast lance as well as a corresponding hot blast lance itself makes all the above-mentioned gases as hot blast handled.
  • Renkharma is lowered to the hot blast line, and that upon reaching the end position, the two complementary Renktagens institute are automatically rotated relative to each other until reaching the Renkendposition with subsequent locking.
  • the working cylinder for locking the Renkharm via a pressure accumulator in the event of an accident are obvious. This is of considerable importance for safety reasons.
  • This sealing air chamber in the manner of a labyrinth seal will be contained between two concentric grooves, preferably trapezoidal grooves, in one of the two opposite flanges in the hot blast closure. In this a sealing cord can be inserted. In the case of the "dislocated" secured end position of the two complementary closure elements, each of which contains a flange, these sealing cords are then sealingly engaged in. In a further very advantageous manner, it is configured that a plurality of clamping connections of the
  • acted hydraulic cylinder are dimensioned so that a maximum of two working cylinders can carry the entire weight of the Aufblaslanze (hot blast lance) if necessary, together with the lance car.
  • the hot blast closure before and after connection with the Aufblaslanze (hot blast lance) is covered with an automatically openable and closable hood so that before or after connection to the Aufblaslanze (hot blast lance) no residual heat from the hot blast line exits.
  • Hot blast closure with a hot blast line and a fixed hot blast source is connectable.
  • the invention supports the use of such a hot blast lance.
  • the operation of the hot blast lance results from the knowledge that when using hot blast a higher and more energetically effective afterburning can be achieved than in the
  • the heat balance of the converter is determined from the tapping temperature. A high
  • Tapping temperature shows a low coolant rate and a low tapping temperature shows a high
  • Tapping temperature and the amount of coolant used targeted an operating point which is called the autothermal point of the process.
  • This autothermal point can be influenced by an afterburning of the process gases in the reaction vessel, for example in the converter, is realized.
  • This afterburning can be operated particularly advantageously by hot blast.
  • Reliability and reproducible tightness of the hot blast closure according to the invention contribute to the fact that the entire combustion process in the converter can be regulated by feeding the cold air into the hot-wire generator.
  • the hot blast lance is fed via the hot blast line of a stationary Pebble Heater, in which heated, if necessary with Oxygen-enriched hot blast is generated.
  • Coolant circuit is provided, and the
  • Hot air cap is provided with a second coolant circuit, and that the two coolant circuits are thermally coupled together, or
  • the gist of the invention is that the hot blast lance over a fixed
  • Hot blast lance and hot blast line via an automatically releasable provided with flanges hot blast closure.
  • Hot blast line is connected to a stationary pebble heater, and that the connection between
  • Hot blast lance and hot blast line via an automatically detachable provided with flanges hot blast closure instead of a Pebble Heater, a cowper or a recuperator can be used as a regenerator.
  • the flange of the hot blast lance is located on a 180 ° bent pipe socket
  • Hot blast lance so that it can even open by lowering the flange of the hot blast line.
  • an exhaust pipe is first connected, for example, before the connection of the lance to the connection element, via which the hot air is led out of the workshop for preheating the feed line. It can also be connected in the region of the connecting element an exhaust pipe, which with a closure device - for example a slide - can be opened or closed.
  • the hot blast connection must then also have another closure element which must be closed when the closure device is open to the exhaust air pipe. In this position, the preheating of the
  • Hot air are introduced via the lance in the converter.
  • Flange element is provided, which in turn is provided with automatic adjustable Renkver gleichschn, such that when closing the successive flanges, the Renkver gleichieri form a gas-tight and mechanically fixed connection of hot blast lance and hot blast line. Furthermore, it is advantageously designed that the
  • RenkverBank the hot blast closure when reaching the connecting Renkendposition automatically by means of a plurality of hydraulic power cylinder mechanically
  • the Renkver gleich institute are automatically rotated by means of hydraulic or motor drive. Equally advantageous is that the injected
  • Hot-air quantity can be controlled exclusively by means of regulating means for the regulated supply of the cold air quantity fed into the Pebble Heater. This is ultimately possible by the hot blast closure according to the invention in a simple and secure manner.
  • H justifywindverBankes is, additionally provided with a closable and open hood to the
  • Hot air shutter is arranged.
  • Piping instead of a tubing is that this is considerably more temperature resistant.
  • FIG. 1 shows the most important components for the
  • Connecting pipe of the hot blast lance are each provided with a flange 5.
  • the flanges 5 are included
  • Figure 1 shows individual components such as hot blast line 6, hot blast lance 3, Pebble Heater 10 and converter in a functional context.
  • the downward movement of the hot blast lance 3 generated by the lance carriage into the converter closes the two complementary ones
  • the thereby controlled respective quantities are from a
  • Control device 20 determined and corresponding
  • the hot blast lance 3 is arranged on a lance carriage 4, which is also controlled by the control device 20.
  • the hot blast lance 3 is provided with the flanges, as well as with Renkver gleich instituten complete with automatic twisting and locking means
  • Hot wind closure 5 connected, which by a
  • the hot blast closure is an automatically controlled device with which the gas-dynamic coherent, and gas-tight connection of hot blast line and hot blast lance by means of said automatic
  • Coupling agent can be produced.
  • the hot blast line 6 is fed by a so-called Pebble Heater 10, which generates hot blast from cold blast in the Blasphase.
  • the cold wind is generated in a fan 13, and optionally can be additionally enriched with oxygen.
  • Figure 2 shows the upper portion of the hot blast lance 3, as well as the hot blast closure 5.
  • the hot blast lance of course continues down and is not shown here.
  • the connecting pipe is designed as a 180 ° pipe bend, so that a downward movement of the
  • Hot blast line closes.
  • the hot blast line also runs down and is not further here
  • the flange 5 v of the hot blast lance 3 has distributed over its outer circumference projecting guide fingers 5 , on > . These guide fingers 5 ,, ⁇ engage in the guide chambers 9 of the hot blast closure during lowering.
  • the lower flange is 5 ⁇ * together with the guide chambers 9 in a twisted by about 30 °
  • Guide chambers 9 are rotated by about 30 °, so that the guide fingers 5,, are locked ⁇ .
  • Figure 3 shows the closed, twisted
  • FIG. 4 shows a side sectional view of the closed hot-air closure 3. It can be seen that the upper flange, namely the flange 5 'contains integral sealing grooves 14 into which sealing cords can be inserted. There is an inner seal groove and an outer seal groove. The seal is designed in the manner of a labyrinth seal. In between, a barrier air volume is enclosed in closed flanges, which is acted upon in the closed state of the flanges with blocking air.
  • the plant is constructed in such a way that with disturbance or
  • Hot wind closure can be done.
  • the hydraulic cylinders are made of one

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Abstract

L'invention concerne un procédé pour faire fonctionner un système de lance de soufflage, dans lequel un vent chaud est soufflé sur le bain de fusion et/ou sur la charge de minerai dans un convertisseur, la lance à vent chaud étant alimentée par une source de vent chaud par l'intermédiaire d'une conduite de vent chaud, conformément au préambule des revendications 1 et 8. Selon l'invention, pour rendre plus efficace le procédé de soufflage et améliorer la lance de soufflage en ce qui concerne son accouplement avec la source de vent chaud, la lance à vent chaud est reliée de manière détachable à la source de vent chaud de telle sorte que, pour chaque charge, c'est-à-dire entre les charges, la liaison peut être défaite et rétablie automatiquement.
PCT/EP2013/001824 2012-08-08 2013-06-20 Procédé pour faire fonctionner un système de lance de soufflage, et système de lance de soufflage lui-même WO2014023371A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13737534.1A EP2882875B1 (fr) 2012-08-08 2013-06-20 Procédé pour faire fonctionner un système de lance de soufflage, et système de lance de soufflage lui-même

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012016045A DE102012016045B3 (de) 2012-08-08 2012-08-08 Verfahren zum Betrieb einer Aufblaslanzenanordnung, sowie Aufblaslanzenanordnung selbst
DE102012016045.3 2012-08-08

Publications (1)

Publication Number Publication Date
WO2014023371A1 true WO2014023371A1 (fr) 2014-02-13

Family

ID=48794030

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/001824 WO2014023371A1 (fr) 2012-08-08 2013-06-20 Procédé pour faire fonctionner un système de lance de soufflage, et système de lance de soufflage lui-même

Country Status (3)

Country Link
EP (1) EP2882875B1 (fr)
DE (1) DE102012016045B3 (fr)
WO (1) WO2014023371A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4334559A (en) * 1980-06-13 1982-06-15 Deem Larry D Pipe coupling
EP0112540A1 (fr) * 1982-12-21 1984-07-04 Paul Wurth S.A. Installation pour le guidage et le changement des lances immergées
EP0464427A2 (fr) * 1990-07-04 1992-01-08 Paul Wurth S.A. Dispositif d'accouplement automatique d'une lance d'insufflation à un collecteur
DE4228789A1 (de) * 1991-10-14 1993-04-15 Wurth Paul Sa Antrieb fuer automatische lanzenwechselvorrichtung
DE4343957A1 (de) 1993-12-22 1995-06-29 Tech Resources Pty Ltd Konverterverfahren zur Produktion von Eisen
EP1920075B1 (fr) 2006-01-04 2011-12-28 Saarstahl AG Procede et prechauffage d'un agglomerat ferreux

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE815433C (de) * 1949-09-03 1951-10-01 Alfons Dipl-Ing Moser Widerstandsgeringe Schlauchkupplung mit Ventil
DE3607777A1 (de) * 1986-03-08 1987-09-17 Kloeckner Cra Tech Verfahren zur stahlherstellung aus schrott
EP0441767B1 (fr) * 1990-02-01 1995-01-11 Voest-Alpine Industrieanlagenbau Gmbh Dispositif d'alimentation des milieux à une lance de soufflage
DE4240666C2 (de) * 1992-11-24 1996-06-13 Mannesmann Ag Einrichtung zum Halten und Versorgen einer Blaslanze für ein metallurgisches Gefäß
AUPR436901A0 (en) * 2001-04-11 2001-05-17 Technological Resources Pty Limited Apparatus for injecting gas into a vessel
DE102007062393A1 (de) * 2007-06-11 2008-12-18 Beda Oxygentechnik Armaturen Gmbh Schnellverschlusskupplung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4334559A (en) * 1980-06-13 1982-06-15 Deem Larry D Pipe coupling
EP0112540A1 (fr) * 1982-12-21 1984-07-04 Paul Wurth S.A. Installation pour le guidage et le changement des lances immergées
EP0464427A2 (fr) * 1990-07-04 1992-01-08 Paul Wurth S.A. Dispositif d'accouplement automatique d'une lance d'insufflation à un collecteur
DE4228789A1 (de) * 1991-10-14 1993-04-15 Wurth Paul Sa Antrieb fuer automatische lanzenwechselvorrichtung
DE4343957A1 (de) 1993-12-22 1995-06-29 Tech Resources Pty Ltd Konverterverfahren zur Produktion von Eisen
EP1920075B1 (fr) 2006-01-04 2011-12-28 Saarstahl AG Procede et prechauffage d'un agglomerat ferreux

Also Published As

Publication number Publication date
EP2882875B1 (fr) 2018-01-10
EP2882875A1 (fr) 2015-06-17
DE102012016045B3 (de) 2013-10-24

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