EP1989334A2 - Procédé pour refroidir des contenants métallurgiques - Google Patents

Procédé pour refroidir des contenants métallurgiques

Info

Publication number
EP1989334A2
EP1989334A2 EP07726483A EP07726483A EP1989334A2 EP 1989334 A2 EP1989334 A2 EP 1989334A2 EP 07726483 A EP07726483 A EP 07726483A EP 07726483 A EP07726483 A EP 07726483A EP 1989334 A2 EP1989334 A2 EP 1989334A2
Authority
EP
European Patent Office
Prior art keywords
carbon dioxide
cooling
metallurgical vessel
metallurgical
vessel
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.)
Granted
Application number
EP07726483A
Other languages
German (de)
English (en)
Other versions
EP1989334B1 (fr
Inventor
Peter Bauer
Günter WAGENDORFER
Burkhardt Holleis
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.)
Messer Austria GmbH
Original Assignee
Messer 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 Messer Austria GmbH filed Critical Messer Austria GmbH
Priority to PL07726483T priority Critical patent/PL1989334T3/pl
Priority to SI200732021T priority patent/SI1989334T1/en
Priority to RS20180356A priority patent/RS57197B1/sr
Publication of EP1989334A2 publication Critical patent/EP1989334A2/fr
Application granted granted Critical
Publication of EP1989334B1 publication Critical patent/EP1989334B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • C21C5/44—Refractory linings
    • 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
    • F27D1/16—Making or repairing linings ; Increasing the durability of linings; Breaking away linings
    • F27D1/1694—Breaking away the lining or removing parts thereof
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein

Definitions

  • the invention relates to a method for cooling metallurgical vessels.
  • Metallurgical vessels such as furnaces, pans, (casting, treatment, transport, desulphurisation and refilling) tanks for glass or for molten metals, such as aluminum, steel, iron, scrap, converters for steelmaking, melting furnaces in the metal industry and glass industry, incinerators for thermal waste utilization or heat generation, are provided with linings of a refractory material. These linings are subject to high wear due to the high thermal, physical and chemical stresses.
  • a liquefied substitute material is applied by a spray nozzle to worn, eroded or chipped areas of the liner.
  • a hot repair is not possible, in particular, a complete re-delivery can not be accomplished.
  • the metallurgical vessel is subjected to cooling with a cryogenic medium. Due to the thermal contact with the cryogenic medium, the metallurgical vessel is accelerated cooled.
  • the time savings that can be achieved can amount to several hours.
  • cryogenic medium for example, a liquefied or solidified gas is used, for example, liquid nitrogen, which is sprayed at a temperature of -196 ° C on the vessel to be cooled, evaporates when hitting the surface of the metallurgical vessel and thereby deprives the metallurgical vessel heat ,
  • a particularly preferred embodiment of the invention provides to use carbon dioxide as cryogenic medium, in particular carbon dioxide in solid form (dry ice), which is applied to the surface to be cooled or thrown, and sublimated by the thermal contact with the surface.
  • the carbon dioxide is thereby introduced in a first preferred embodiment in the liquid state under pressure and expanded in the region of the surface to be cooled of the metallurgical vessel. Relaxation produces carbon dioxide snow and cold carbon dioxide gas.
  • the carbon dioxide snow is applied by suitable means on the surface to be cooled. In order to achieve a particularly good cooling effect, it should be ensured that as little as possible of the carbon dioxide snow sublimated on its way to the surface to be cooled.
  • dry ice pellets are used which are applied to the surface to be cooled by means of suitable pellet jet devices.
  • the pellets can have any shape and size.
  • the dry ice pellets are either produced directly on site or from the place of their production with suitable transport facilities to the place of use transported. Again, the carbon dioxide should impinge largely in the still solid state on the surface in order to achieve optimum cooling.
  • An expedient development provides for subcooling the cryogenic medium before it is fed to the metallurgical vessel to be cooled.
  • the cooling is increased overall and it also applies to a larger part of the cryogenic medium in the liquid or solid state on the surface of the metallurgical vessel, whereby a further improved cooling performance is achieved.
  • a comparably positive effect can also be achieved in the liquid or gaseous state brought cryogenic media also by the fact that the pressure of the cryogenic medium is increased before it is fed to the metallurgical vessel to be cooled.
  • FIG. 1 shows schematically a procedure in the implementation of the method according to the invention.
  • the drawing shows a metallurgical vessel, in the exemplary embodiment, a converter 1, which was previously, for example, for re-delivery, out of service and should now be cooled.
  • the converter 1 For cooling by means of the method according to the invention, the converter 1 is moved to a position in which its interior is accessible for exposure to a cryogenic medium.
  • carbon dioxide is provided in the embodiment.
  • the carbon dioxide is introduced in liquid form in a mobile tank unit 2, for example a tanker or a tank car.
  • the liquid carbon dioxide passes from the tank unit 2 at a pressure of for example 15 to 20 bar via a pressure line 3 to a likewise designed as a mobile unit discharge Device 4 for carbon dioxide snow.
  • the discharge device 4 comprises a relaxation device 5, in which the pressure line 3 opens. At the expansion device 5, the liquid carbon dioxide is released to a pressure of about 1 bar, where it partially freezes to carbon dioxide snow and partially evaporated to carbon dioxide gas.
  • a device 7 for supercooling the liquid carbon dioxide transported in the pressure line 3 can be provided in the pressure line 3, in order to increase the proportion of carbon dioxide snow formed during the expansion on the expansion element 5 compared to the carbon dioxide gas content. Furthermore, in the line, upstream of the device 7, a device 8 may be provided to increase the pressure to increase the output pressure before the relaxation.
  • the carbon dioxide snow is discharged in the direction of the inner surface of the converter 1 by means of a nozzle arrangement 6, in which optionally a cold gas flow is generated with the aid of external energy.
  • the nozzle assembly 6 is mounted on a supporting structure 9, which is constructed so that the nozzle unit 6 are moved into the interior of the converter 1 and there can act on at least approximately each area with carbon dioxide snow.
  • the carbon dioxide particles are accelerated by the nozzle assembly 6 so that they impinge at least partially in the still solid state on the surface to be cooled. After impacting the surface to be cooled, the carbon dioxide particles sublimate, removing heat from the surface to be cooled.
  • the irradiation Upon reaching a certain target temperature in the interior of the converter 1, in which a visit of the converter 1 is possible, the irradiation is terminated. In this way, the cooling process is significantly accelerated, and the converter 1 can be committed much earlier than would be the case without cooling.
  • a converter for the production of steel produces 300t / h liquid product.
  • the converter is put out of operation and then to a cooled for the commission by staff tolerable temperature.
  • the cooling process is about 15 hours without the cooling according to the invention.
  • the interior of the converter is charged during the cooling process for a period of 4 hours with an amount of 20 tons / h of carbon dioxide snow. This shortens the cooling time by about 3 hours. With 10 deliveries per year, this time saving results in an increase in steel production of 9000 t annually.

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)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Abstract

Les contenants métallurgiques tels que les cuves ou les convertisseurs doivent de temps en temps être inspectés par le personnel adéquat pour des raisons d'entretien, en particulier pour l'application d'un nouveau revêtement au moyen d'un matériau réfractaire. Pour que cette inspection puisse être réalisée, il faut laisser le contenant métallurgique refroidir pendant un certain temps après sa mise hors service, ce qui implique un temps d'attente significatif avant sa remise en service. Pour réduire le temps de refroidissement, des essais ont déjà été menés pour refroidir les contenants métallurgiques au moyen d'un ventilateur. Cependant, les performances de refroidissement atteintes de cette manière ne sont dans l'ensemble pas satisfaisantes. Selon l'invention, il est possible d'accélérer le processus de refroidissement de contenants métallurgiques par application d'un réfrigérant cryogène, tel que du dioxyde de carbone liquide ou solide ou de l'azote liquide. Dans un mode de réalisation préféré de cette invention, de la neige carbonique est pulvérisée sur le contenant métallurgique après sa mise hors service. Ainsi, le processus de refroidissement est considérablement accéléré.
EP07726483.6A 2006-02-22 2007-02-22 Procédé pour refroidir des contenants métallurgiques Active EP1989334B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PL07726483T PL1989334T3 (pl) 2006-02-22 2007-02-22 Sposób chłodzenia pojemników metalurgicznych
SI200732021T SI1989334T1 (en) 2006-02-22 2007-02-22 Procedure for cooling metallurgical containers
RS20180356A RS57197B1 (sr) 2006-02-22 2007-02-22 Proces za hlađenje metalurških posuda

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006008186A DE102006008186A1 (de) 2006-02-22 2006-02-22 Verfahren zum Kühlen metallurgischer Gefäße
PCT/EP2007/051725 WO2007096411A2 (fr) 2006-02-22 2007-02-22 Procédé pour refroidir des contenants métallurgiques

Publications (2)

Publication Number Publication Date
EP1989334A2 true EP1989334A2 (fr) 2008-11-12
EP1989334B1 EP1989334B1 (fr) 2018-01-31

Family

ID=38288891

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07726483.6A Active EP1989334B1 (fr) 2006-02-22 2007-02-22 Procédé pour refroidir des contenants métallurgiques

Country Status (9)

Country Link
EP (1) EP1989334B1 (fr)
DE (1) DE102006008186A1 (fr)
ES (1) ES2666453T3 (fr)
HU (1) HUE038799T2 (fr)
PL (1) PL1989334T3 (fr)
RS (1) RS57197B1 (fr)
SI (1) SI1989334T1 (fr)
UA (1) UA89724C2 (fr)
WO (1) WO2007096411A2 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS496722B1 (fr) * 1970-09-17 1974-02-15
DE2851259C3 (de) * 1978-10-13 1981-10-01 Spribag Ag, Widen-Mutschellen Spritzanlage zur Heißreparatur von metallurgischen Gefäßen
DE3720992A1 (de) * 1987-06-25 1989-01-05 Nusec Gmbh Verfahren und anlage zum bestrahlen von oberflaechen, insbesondere von kontaminierten oberflaechen
JP2696351B2 (ja) * 1988-08-12 1998-01-14 大同ほくさん株式会社 炉材の冷却方法
FR2665519A1 (fr) * 1990-08-03 1992-02-07 Fischer Ag Georg Procede de reparation de cubilot a vent chaud.
DE19732893A1 (de) * 1997-07-30 1999-02-04 Linde Ag Verfahren zum Abkühlen von Ofenauskleidungen von Industrieöfen
US6186869B1 (en) * 1999-02-12 2001-02-13 Cetek Limited Cleaning using welding lances and blasting media
JP4483745B2 (ja) * 2005-09-01 2010-06-16 住友金属工業株式会社 転炉炉内の冷却方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007096411A2 *

Also Published As

Publication number Publication date
WO2007096411A3 (fr) 2007-11-29
UA89724C2 (uk) 2010-02-25
DE102006008186A1 (de) 2007-08-23
RS57197B1 (sr) 2018-07-31
EP1989334B1 (fr) 2018-01-31
PL1989334T3 (pl) 2018-06-29
HUE038799T2 (hu) 2018-11-28
SI1989334T1 (en) 2018-05-31
ES2666453T3 (es) 2018-05-04
WO2007096411A2 (fr) 2007-08-30

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