WO1989003011A1 - Recipient destine a contenir du metal en fusion - Google Patents

Recipient destine a contenir du metal en fusion Download PDF

Info

Publication number
WO1989003011A1
WO1989003011A1 PCT/GB1988/000780 GB8800780W WO8903011A1 WO 1989003011 A1 WO1989003011 A1 WO 1989003011A1 GB 8800780 W GB8800780 W GB 8800780W WO 8903011 A1 WO8903011 A1 WO 8903011A1
Authority
WO
WIPO (PCT)
Prior art keywords
vessel
droplets
coolant
metal
shell
Prior art date
Application number
PCT/GB1988/000780
Other languages
English (en)
Inventor
Derek Macauley
Original Assignee
Davy Mckee (Stockton) Limited
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) Limited filed Critical Davy Mckee (Stockton) Limited
Publication of WO1989003011A1 publication Critical patent/WO1989003011A1/fr

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)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (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.
PCT/GB1988/000780 1987-09-23 1988-09-22 Recipient destine a contenir du metal en fusion WO1989003011A1 (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
WO1989003011A1 true WO1989003011A1 (fr) 1989-04-06

Family

ID=10624239

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1988/000780 WO1989003011A1 (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)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0393970A2 (fr) * 1989-04-20 1990-10-24 Davy Mckee (Stockton) Limited Refroidissement de parties chaudes
WO1995012797A1 (fr) * 1993-11-03 1995-05-11 Davy Mckee (Stockton) Limited Refroidissement de corps chauds
EP0694733A1 (fr) * 1994-07-25 1996-01-31 Daidotokushuko Kabushikikaisha Four à fusion pour déchets et méthode pour fondre le déchets
US5653936A (en) * 1994-07-25 1997-08-05 Voest-Alpine Industrieanlagenbau Gmbh Method of cooling a hot surface and an arrangement for carrying out the method
GB2330898A (en) * 1997-10-28 1999-05-05 Voest Alpine Ind Anlagen Cooling a surface of a metallurgical vessel
US7527715B2 (en) 2002-07-09 2009-05-05 Aluminum Pechiney Method and system for cooling an electrolytic cell for aluminum production

Citations (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
FR2468863A1 (fr) * 1979-10-26 1981-05-08 Demag Ag Mannesmann Couvercle de cuve pour un four de fusion de metaux, notamment pour un four electrique a arc
EP0044512A1 (fr) * 1980-07-19 1982-01-27 Fuchs Systemtechnik GmbH Procédé et dispositif pour le refroidissement des parties de la cuve d'un four métallurgique, en particulier d'un four à arc électrique

Patent Citations (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
FR2468863A1 (fr) * 1979-10-26 1981-05-08 Demag Ag Mannesmann Couvercle de cuve pour un four de fusion de metaux, notamment pour un four electrique a arc
EP0044512A1 (fr) * 1980-07-19 1982-01-27 Fuchs Systemtechnik GmbH Procédé et dispositif pour le refroidissement des parties de la cuve d'un four métallurgique, en particulier d'un four à arc électrique

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0393970A2 (fr) * 1989-04-20 1990-10-24 Davy Mckee (Stockton) Limited Refroidissement de parties chaudes
EP0393970A3 (en) * 1989-04-20 1990-12-19 Davy Mckee (Stockton) Limited Cooling of hot bodies
WO1995012797A1 (fr) * 1993-11-03 1995-05-11 Davy Mckee (Stockton) Limited Refroidissement de corps chauds
EP0694733A1 (fr) * 1994-07-25 1996-01-31 Daidotokushuko Kabushikikaisha Four à fusion pour déchets et méthode pour fondre le déchets
US5653936A (en) * 1994-07-25 1997-08-05 Voest-Alpine Industrieanlagenbau Gmbh Method of cooling a hot surface and an arrangement for carrying out the method
GB2330898A (en) * 1997-10-28 1999-05-05 Voest Alpine Ind Anlagen Cooling a surface of a metallurgical vessel
US7527715B2 (en) 2002-07-09 2009-05-05 Aluminum Pechiney Method and system for cooling an electrolytic cell for aluminum production

Also Published As

Publication number Publication date
EP0331707A1 (fr) 1989-09-13
GB8722354D0 (en) 1987-10-28

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