EP0331707A1 - Recipient destine a contenir du metal en fusion - Google Patents

Recipient destine a contenir du metal en fusion

Info

Publication number
EP0331707A1
EP0331707A1 EP19880908290 EP88908290A EP0331707A1 EP 0331707 A1 EP0331707 A1 EP 0331707A1 EP 19880908290 EP19880908290 EP 19880908290 EP 88908290 A EP88908290 A EP 88908290A EP 0331707 A1 EP0331707 A1 EP 0331707A1
Authority
EP
European Patent Office
Prior art keywords
vessel
droplets
coolant
metal
shell
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Withdrawn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
EP19880908290
Other languages
German (de)
English (en)
Inventor
Derek Macauley
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.)
Kvaerner Engineering and Construction UK Ltd
Original Assignee
Davy Mckee Stockton Ltd
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 Davy Mckee Stockton Ltd filed Critical Davy Mckee Stockton Ltd
Publication of EP0331707A1 publication Critical patent/EP0331707A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F27B3/24—Cooling arrangements
    • 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
    • C21C5/4646—Cooling arrangements
    • 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
    • C21C7/10—Handling in a vacuum
    • 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
    • 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
    • C21C5/4633—Supporting means
    • 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
    • C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle

Definitions

  • This invention relates to vessels for containing molten metal and in particular to such vessels having means for cooling a metal body forming part of, or associated with, the vessel.
  • the invention also relates to a method of cooling a hot metal body of such a vessel.
  • An object of the present invention is to provide a vessel for containing molten metal in which provision is made for cooling a body forming part of, or associated with, the vessel without the danger of significant quantities of water and liquid metal coming into contact with each other.
  • droplets of liquid coolant are applied to the outer surface of the body in a controlled manner such that the volume of coolant applied in a given time period does not exceed the volume of coolant which is vaporised by contact with the hot surface in the given time period.
  • the liquid coolant is conveniently water and, since the water is applied in the form of droplets on to the outer surface of the shell, cooling by vaporisation takes place. In this way advantage can be taken of the fact that a much greater quantity of heat can be removed by each unit mass of water employed when it is vaporised than when it remains liquid. As the water is applied at a rate not exceeding the rate at which the water is vaporised by contact with the hot surface, there is no water remaining to run off the surface being cooled into possible contact with the molten metal contained within the vessel.
  • a vessel having a metal body which forms part of the vessel, or is associated with it, and means for applying, in a controlled manner, droplets of liquid coolant to the outer surface of the metal body whereby, in use, with molten metal in the body, the volume of coolant applied in a given time period does not exceed the volume of. coolant which is vaporised by contact with the hot metal surfaces in the given time period.
  • the metal body is ususally the shell of the vessel and the liquid coolant is supplied to the vicinity of the metal shell by way of tubes, pipes, headers and the like and the means for applying droplets to the outer surface of the shell to be cooled may take the form of nozzles which produce a very fine spray or they may comprise atomisers to which the liquid coolant and a compressed gas are supplied for the gas to break up the liquid coolant into very fine droplets.
  • the amount of liquid coolant applied to the surface of the shell is controlled by means which determines the temperature of the outer surface of the part of the shell to be cooled and valve means for controlling the supply of liquid coolant in response to the determined temperature such that the droplets which are applied over a time period do not exceed the droplets which are vaporised by contact with the surface during that period.
  • Figure 1 is a sectional side elevation of a basic oxygen furnace in accordance with the present invention
  • Figure 2 is a section through a ladle furnace
  • Figure 3 is a section through an electric arc furnace.
  • a basic oxygen furnace 1 comprises a steel shell 2 having a lining 3 formed from blocks of refractory material.
  • Shell 2 is carried in a trunnion ring 4 having a pair of horizontally disposed trunnions 4' which are, in turn, supported by pedestal bearings 5.
  • the trunnions permit the furnace to be tilted about a horizontal axis to permit molten metal to be poured from the tap hole.
  • the shell 2 is formed with a conical section 2 1 which is topped by a nose ring 6.
  • the conical section of the shell is surrounded by slag shedder plates 7 which protect the conical section of the shell 2' from slag and molten metal spilled from the mouth of the vessel.
  • steel is refined in the refractory lined shell by blowing oxygen into a bath of liquid iron either through tuyeres (not shown) in the base of the furnace shell or on to the surface of the liquid iron through a water-cooled lance (not shown) projected into the furnace through its open mouth.
  • the shell of the vessel becomes very hot and it is not convenient to supply a water cooling jacket or conduit in the vicinity of the open mouth of the furnace in case a fault occurs and a substantial amount of water enters into the furnace to contact the molten metal therein.
  • cooling is- supplied to the conical section 2' of the shell by positioning a series of radial headers 8 around the outer periphery of the conical section 2' and water is supplied to these headers from a main supply 9 under the control of-a valve 10.
  • Each header 8 is in communication with a plurality of spray nozzles 8' which apply the water supplied to the headers on to the outer surface of the conical section 2' in the form of droplets.
  • the spray nozzles produce droplets rather than providing a coherent curtain of liquid coolant on the surface of the vessel.
  • the rate at which the droplets are applied to the surface is controlled such that the coolant is vaporised by contact with the hot surface and the surface is not cooled to such an extent that water runs off the surface.
  • thermocouples 12 are used to determine the temperature of the surface and this is transmitted to a temperature controller 11 which controls the supply of water passing through the valve 10.
  • Further spray nozzles 13 can be provided in the region of the trunnion ring 4 for spraying droplets of water on to the outside of the shell 2.
  • a similar method of temperature control can be used for these spray nozzles 13.
  • the spray nozzles 8 can be replaced by atomisers to which a supply of compressed gas and water is provided, the gas breaking up the water into very fine droplets.
  • a ladle furnace comprises a steel shell 2 having a refractory lining 3.
  • a lid 18 is fitted on to the ladle and electrodes 14 project through openings in the lid into the vessel for the production of an electric arc between them.
  • the shell of the lid is provided with cooling means in the form of spray headers 8 which are supplied with liquid coolant from a supply main 9 via a control valve 10. The appparatus for cooling the lid and the method of operating the apparatus is as described with the embodiment of Figure 1.
  • an electric arc furnace has a removable lid 18 comprising a metal shell with a refractory lining.
  • the lid is mounted over the base of the furnace and the electrodes 14 pass through openings in the lid of the furnace.
  • the electrodes are withdrawn from the furnace and the lid is swung to one side.
  • sprays 8' or atomisers are located relative to the surface of the lid so that cooling liquid can be applied in the form of droplets on to the surface of the lid. The amount of liquid which is supplied is controlled to ensure that substantially all the liquid is applied to the surface and there is no water which can run off the lid into contact with the molten metal.
  • the upper ends of the electrodes are each contained within a metal tube which becomes very hot when the furnace is in use.
  • the invention may be applied to cool these metal bodies.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Abstract

Récipient destiné à contenir du métal en fusion, comprenant un revêtement métallique. Au moins une partie du revêtement est refroidie par l'application de gouttelettes d'eau sur sa surface externe et à une vitesse n'excédant pas celle à laquelle les gouttelettes sont vaporisées, afin que l'eau ne s'écoule pas hors de la surface refroidie en contact avec le métal en fusion. On peut refroidir d'autres corps métalliques associés au récipient.
EP19880908290 1987-09-23 1988-09-22 Recipient destine a contenir du metal en fusion Withdrawn EP0331707A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB878722354A GB8722354D0 (en) 1987-09-23 1987-09-23 Metallurgical furnace
GB8722354 1987-09-23

Publications (1)

Publication Number Publication Date
EP0331707A1 true EP0331707A1 (fr) 1989-09-13

Family

ID=10624239

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880908290 Withdrawn EP0331707A1 (fr) 1987-09-23 1988-09-22 Recipient destine a contenir du metal en fusion

Country Status (3)

Country Link
EP (1) EP0331707A1 (fr)
GB (1) GB8722354D0 (fr)
WO (1) WO1989003011A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8908997D0 (en) * 1989-04-20 1989-06-07 Davy Mckee Stockton Vessels for containing molten metal
GB9322696D0 (en) * 1993-11-03 1993-12-22 Davy Mckee Stockton Cooling of hot bodies
ATA147194A (de) * 1994-07-25 1997-11-15 Voest Alpine Ind Anlagen Verfahren zum kühlen einer heissen oberfläche sowie einrichtung zur durchführung des verfahrens
US5601427A (en) * 1994-07-25 1997-02-11 Daidotokushuko Kabushikikaisha Waste melting furnace and a method of melting wastes
DE19842715A1 (de) * 1997-10-28 1999-04-29 Voest Alpine Ind Anlagen Verfahren zum Kühlen einer Oberfläche eines metallurgischen Gefäßes
FR2842215B1 (fr) 2002-07-09 2004-08-13 Pechiney Aluminium Procede et systeme de refroidissement d'une cuve d'electrolyse pour la production d'aluminium

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE403754A (fr) *
DE1043591B (de) * 1956-11-09 1958-11-13 Strico Ges Fuer Metallurg Vorrichtung zur Regelung der Kuehlwassermenge
FR1440807A (fr) * 1965-04-16 1966-06-03 Soudure Et De Rechargement Mec Perfectionnements aux boîtes de refroidissement pour hauts fourneaux et analogues
US4024764A (en) * 1976-04-22 1977-05-24 Bethlehem Steel Corporation Method and apparatus for measuring product surface temperature in a spray cooling chamber
DE2943244C2 (de) * 1979-10-26 1983-01-05 Mannesmann AG, 4000 Düsseldorf Gefäßdeckel für einen Metallschmelzofen insbesondere elektrischen Lichtbogenofen
DE3027465C1 (de) * 1980-07-19 1982-03-18 Korf-Stahl Ag, 7570 Baden-Baden Verfahren und Vorrichtung zum Kuehlen von Gefaessteilen eines metallurgischen Ofens,insbesondere eines Lichtbogenofens

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8903011A1 *

Also Published As

Publication number Publication date
WO1989003011A1 (fr) 1989-04-06
GB8722354D0 (en) 1987-10-28

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