EP0430740A1 - Plattenkühler für Hochöfen und eine aus solchen Kühlelementen zusammengesetzte Einrichtung - Google Patents

Plattenkühler für Hochöfen und eine aus solchen Kühlelementen zusammengesetzte Einrichtung Download PDF

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Publication number
EP0430740A1
EP0430740A1 EP90403169A EP90403169A EP0430740A1 EP 0430740 A1 EP0430740 A1 EP 0430740A1 EP 90403169 A EP90403169 A EP 90403169A EP 90403169 A EP90403169 A EP 90403169A EP 0430740 A1 EP0430740 A1 EP 0430740A1
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EP
European Patent Office
Prior art keywords
cooling
plates
cooling plate
plate according
blast furnace
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
EP90403169A
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English (en)
French (fr)
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EP0430740B1 (de
Inventor
Pierre Rollot
Alain Dufour
Lucien Delaitre
Bernard Thiel
François Graffeuille
Raymond Capelani
Hubert Dosda
Jean-Michel Dardart
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.)
Forcast International
Original Assignee
Forcast International
Chavanne Ketin SA
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Publication of EP0430740A1 publication Critical patent/EP0430740A1/de
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Publication of EP0430740B1 publication Critical patent/EP0430740B1/de
Anticipated expiration legal-status Critical
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/10—Cooling; Devices therefor

Definitions

  • the present invention relates to a cooling plate used in metallurgical units whose walls are subjected to high heat fluxes such as for blast furnaces, but which can be used for ovens or equipment which it is desired, either to collect the heat flux emitted by the oven, or heat the walls in a controlled manner using this same type of plate.
  • the present invention also relates to a cooling installation using this type of plate.
  • Modern blast furnaces are increasingly being operated at speeds and pressure levels. such that the heat fluxes emitted can be, globally, locally and randomly important, and that it is necessary to collect them and ensure their transfer, in particular in the areas of displays, belly, bottom of tank, mid - tank and top of tank.
  • the shield does not reach temperature levels or does not undergo temperature variations with the formation of thermomechanical stresses, which can jeopardize its resistance to mechanical resistance.
  • the heat fluxes emitted in the different zones of the blast furnace must be captured by a heterogeneous system formed by the refractory lining, the cooling element, ie the cooling plate, the shielding, such that the cooling element fills a dual function of energetic cooling of the refractory and of screen for the passage of fluxes towards the shielding.
  • the cooling plates can be brought and maintained at a certain temperature to fulfill functions of heating or keeping in temperature of body in any granulometric form in order to evacuate their water content or to wear them at a temperature necessary for their use.
  • the cooling plates consist of cast iron elements traversed in their mass by a network of tubes in which circulates a cooling flow which is generally water.
  • These cooling tubes open on one face of the cooling plates and pass through the shield, outside of which they are connected either to each other, or to cooling tubes of an adjacent upper or lower plate.
  • the tubes thus connected determine lines of circulation of the fluid rising in a substantially vertical plane along the wall of the blast furnace, these lines being connected to an external circuit for circulation and cooling of the fluid.
  • the cooling plates must be designed in such a way that they ensure good heat exchange with the cooling fluid and with the refractory lining, while creating a screen for the thermal flow propagating from the oven to the shielding.
  • thermomechanical deformations and stresses resulting from high heat fluxes resist abrasion when the refractory lining has partially or completely disappeared and they must be able to be easily changed without having to enter the enclosure of the upper furnace.
  • Cooling installations are known, in particular blast furnaces, the cooling plates of which consist of a cast iron element of substantially parallelepiped shape, in which are embedded longitudinal tubes arranged parallel to each other, these tubes opening on the same main face, respectively in the upper and lower part of the cooling plate, in a protective sheath, one of the original characteristics of which is the embossed shape from the face opposite to that where the cooling tubes open.
  • the cooling plates are lined with their refractory lining element directly on the steel site during the construction or repair of a blast furnace, which does not allow this operation to be carried out with all the care and quality controls. required.
  • the present invention seeks to remedy these drawbacks by proposing to provide a cooling installation having greater reliability, still ensuring a uniform and effective role as a screen for the passage of flows from the furnace to the shielding and allowing a setting in place the refractory lining element directly in the workshop.
  • the present invention thus relates to a cooling plate in particular of a blast furnace in which a cooling fluid circulates by means of internal tubes, characterized in that it has the shape of a "C" whose branches define two continuous horizontal copings between which a covering element of refractory material is inserted.
  • - at least one of the copings has an undercut blocking the covering element made of refractory material.
  • the covering element in refractory material is composed of shaped refractory bricks
  • - the covering element in refractory material is monolithic, produced by pouring refractory concrete in the space delimited by the copings
  • - the brick resting on the undercut is a brick unlocking all the bricks of the covering element made of refractory material
  • - the undercut is a retaining notch for the monolithic covering element.
  • a coping with the undercut a coping with the undercut.
  • each coping has a horizontal sheet of at least one cooling tube depending on its location in the blast furnace, - each coping has on its hot face an insert with a profile suitable for strengthening said hot face, - the insert is made of silicon carbide.
  • the present invention also relates to a cooling installation in particular of a blast furnace using cooling plates defined above, said cooling plates being arranged in successive rings superimposed along the internal wall of the shielding of the blast furnace and being traversed by internal tubes in which a cooling fluid circulates, the inlets and outlets of said internal tubes being located at different levels, the internal tubes of two adjacent plates in a plane vertical being connected together so as to define a network of vertical circulation lines of the fluid, connected to an external circuit, characterized in that the plates of each crown are, relative to the plates of the adjacent crown, offset in a horizontal plane at least one cooling tube so as to form over the major part of the surface of said plates lines of identical length.
  • the installation shown in FIG. 1 comprises a blast furnace 1, against the internal wall of which are placed cooling plates of which only the internal conduits have been shown tees connected to each other, designated by the general reference 2.
  • the cooling plates indeed have internal tubes which open at different levels to the upper and lower parts of the latter, and are connected to the adjacent plate immediately above and to the adjacent plate immediately lower in a vertical plane, to define a circulation line formed by all the internal tubes connected to each other.
  • a circular supply line 3, surrounding the blast furnace at its bottom, comprises a set of individual supply lines 4 which are respectively connected. at the inputs 5 of the circulation lines 2.
  • a circular return line 6, surrounding the blast furnace at a higher level, also comprises a set of individual return lines 7 connected to the outputs 8 of the circulation lines.
  • This set of vertical circulation lines constitutes a network placed along the shield of the blast furnace which is connected respectively at its bottom part to the supply circular 3 and at the top part to the return circular 6.
  • This network of circulation lines is connected at each of its ends by means of the supply circulars 3 and return 6 to an external circuit, not shown.
  • Fig.1 there is shown, for the sake of simplification, only a supply circular and a return circular for a circulation line of the refrigerant.
  • the cooling fluid which in the following description will be considered without limitation as being water, is introduced at different levels in the same vertical plane in different rows of the cooling plates.
  • each cooling plate 20 consists of a cast iron element of substantially parallelepiped shape having the shape of a "C" whose central part constitutes the body 21 of the plate and whose two branches define in the upper and lower part a curb 22 and 23 respectively horizontal and continuous.
  • the inputs 25a, 25b, 25c ... and the outputs 26a, 26b, 26c ... are distributed over three levels so as to define in the body 21 an alternation of short tubes 24a, 24c and 24e and long tubes 24b and 24d.
  • Each coping 22 and 23 is cooled for example by two transverse tubes respectively 27a, 27b and 28a, 28b arranged horizontally, the inlets 270a, 270b and 280a, 280b and the outlets 271a, 271b and 281a, 281b open onto the rear face of the cooling plate.
  • the horizontal tubes 25a, 27b and 28a and 28b make it possible to cool the angles of the cooling plate 20 more intensely, and provide, with all of the longitudinal tubes, homogeneously, the role of a screen in the passage of heat flows, by effective cooling of each of the cooling plates 20 and of all the plates which are adjoining them.
  • the number of horizontal tubes is a function of the position of the cooling plate 20 in the blast furnace.
  • the section of the horizontal tubes 27a, 27b, 28a and 28b is such that it is possible, by sufficient circulation speeds, greater than 2 m / s, to capture the flows emitted without requiring large flow rates, or to generate abnormally high pressure losses .
  • the speed of circulation of the cooling fluid in the vertical tubes 24a, 24b, 24c ... can be adjusted according to a cooling module.
  • the front face of the plate 20 located between the copings 22 and 23 has an embossing 30 (Fig. 2), the waves of which are filled with a refractory product 31 which is a good conductor of small particle size.
  • the thickness of the coping 22 and 23 is of the order of 200 mm.
  • the brick 32a resting on the undercut 22a is a key brick blocking all of the refractory bricks.
  • the bricks 32 can be mounted directly in the workshop during the manufacturing of the plates with all the care and quality controls required, which cannot be perfectly applied during the usual period of construction or repair of the refractory walls of blast furnaces on the steel site.
  • the refractory lining element can be monolithic, for example made of refractory concrete poured between the coping 22 and 23 and in this case the undercut 22a forms a notch for holding said element on the plate 20.
  • this new generation of cooling plates makes it possible to obtain better contact between the cast iron and the refractory, a quality assurance of the implementation of the refractories and. saving time during construction or refurbishment of blast furnaces.
  • Each coping 22 and 23 has on its hot face an insert 33, for example made of silicon carbide, in particular of trapezoidal cross section with dovetail, for reinforcing said hot face (FIG. 2).
  • cooling plates 20 are arranged in successive rings A, B, C ... superimposed along the internal wall of the shield of the blast furnace and the internal tubes 24 of two adjacent plates in a vertical plane are interconnected so as to define a network of vertical circulation lines of the fluid, connected to the external circuit.
  • the plates 20 of a crown on two are offset in a horizontal plane, relative to the plates 20 of the adjacent upper ring A and C, of a cooling fluid circulation tube so as to form over the major part of the surface determined by said cooling plates lines 40 of identical lengths.
  • This definition makes it possible to obtain a uniform distribution of the cooling fluid.
  • Each plate 20 is fixed to the shield 41 using, on the one hand, a fixed point 42 for example in the lower part under controlled pressure on continuous seals 43 made of elastomer and products. filling insulators 44 and, on the other hand, a movable point 45 with sealing compensators 46 for example in the upper part of said plate 20 under controlled pressure on discontinuous seals 47 made of elastomer and filling insulating products 44.
  • Welded washers 48 are provided between the inlets 25 of the tubes 24 and the shield 41 at the fixed points 42, while sliding washers 49 are provided between the outlets 26 of the tubes 24 at the movable points 45.
  • seals 50 which are mounted after placing said plates on the shield 41.
  • These seals 50 are constituted by example of a fibrous putty.
  • the installation according to the present invention makes it possible to have, for certain sensitive areas of the blast furnace, an even more efficient screen for the passage of the heat flux, to irrigate the angular areas of the plates more intensely and to avoid the creation of 'more or less wide interfaces detrimental to heat transfer and conduction phenomenon through the assembly formed by the plates and the refractory wall.
  • cooling plates avoids the separation of the refractory lining from its support on the hot face, which makes it possible to fully benefit from the physicochemical qualities of the refractories.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
EP90403169A 1989-11-14 1990-11-07 Plattenkühler für Hochöfen und eine aus solchen Kühlelementen zusammengesetzte Einrichtung Expired - Lifetime EP0430740B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8914936A FR2654438B1 (fr) 1989-11-14 1989-11-14 Plaques de refroidissement pour hauts-fourneaux et installation de refroidissement mettant en óoeuvre ce type de plaques.
FR8914936 1989-11-14

Publications (2)

Publication Number Publication Date
EP0430740A1 true EP0430740A1 (de) 1991-06-05
EP0430740B1 EP0430740B1 (de) 1994-07-13

Family

ID=9387393

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90403169A Expired - Lifetime EP0430740B1 (de) 1989-11-14 1990-11-07 Plattenkühler für Hochöfen und eine aus solchen Kühlelementen zusammengesetzte Einrichtung

Country Status (7)

Country Link
US (1) US5295666A (de)
EP (1) EP0430740B1 (de)
JP (1) JPH03183708A (de)
AT (1) ATE108492T1 (de)
CA (1) CA2029737A1 (de)
DE (1) DE69010639T2 (de)
FR (1) FR2654438B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0705906A1 (de) * 1994-10-07 1996-04-10 MAN Gutehoffnungshütte Aktiengesellschaft Kühlplatte für Schachtöfen
EP0741190A1 (de) * 1995-05-05 1996-11-06 MAN Gutehoffnungshütte Aktiengesellschaft Kühlplatten für Schachtöfen
WO2009097832A1 (de) * 2008-02-08 2009-08-13 Sms Siemag Ag Kühlelement zur kühlung der feuerfesten auskleidung eines metallurgischen ofens (ac, dc)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19503912C2 (de) * 1995-02-07 1997-02-06 Gutehoffnungshuette Man Kühlplatte für Schachtöfen, insbesondere Hochöfen
CA3024498C (en) * 2016-05-17 2021-05-25 Berry Metal Company Furnace stave
CN113957190B (zh) * 2020-07-21 2022-10-21 宝山钢铁股份有限公司 一种高炉用冷却板及其维护方法
WO2022058773A1 (en) * 2020-09-15 2022-03-24 Arcelormittal Blast furnace for ironmaking production

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1371906A (en) * 1918-04-03 1921-03-15 Blaw Knox Co Water-cooler for furnaces
US1376617A (en) * 1919-11-24 1921-05-03 John O Griggs Portable back wall for open-hearth furnaces
EP0021919A1 (de) * 1979-06-06 1981-01-07 Technilor Vorrichtung zum Befestigen und Abdichten von Kühlplatten am Hochofen
FR2526928A1 (fr) * 1982-05-14 1983-11-18 Inst Proekt Metallu Dispositif de refroidissement de la paroi d'un four metallurgique
EP0337271A1 (de) * 1988-04-13 1989-10-18 Sidmar N.V. Plattenkühler für Schachtöfen

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB496289A (en) * 1937-04-23 1938-11-23 Brassert & Co Improvements in and relating to refractory linings for shaft furnaces
JPS505125B1 (de) * 1968-10-22 1975-02-28
JPS5231282B2 (de) * 1973-11-19 1977-08-13
US4026352A (en) * 1974-09-04 1977-05-31 Sergei Mikhailovich Andoniev Device for evaporative cooling of metallurgical units
SU590068A1 (ru) * 1976-03-23 1978-01-30 Каширский Литейный Завод "Центролит" Плакированна смесь дл изготовлени литейных оболочковых форм и стержней,отверждаемых при контракте с гор чей оснасткой
JPS6335708A (ja) * 1986-07-31 1988-02-16 Nippon Steel Corp 高炉炉体保護壁
JPH0663012B2 (ja) * 1988-08-10 1994-08-17 川崎製鉄株式会社 高炉炉体保護壁

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1371906A (en) * 1918-04-03 1921-03-15 Blaw Knox Co Water-cooler for furnaces
US1376617A (en) * 1919-11-24 1921-05-03 John O Griggs Portable back wall for open-hearth furnaces
EP0021919A1 (de) * 1979-06-06 1981-01-07 Technilor Vorrichtung zum Befestigen und Abdichten von Kühlplatten am Hochofen
FR2526928A1 (fr) * 1982-05-14 1983-11-18 Inst Proekt Metallu Dispositif de refroidissement de la paroi d'un four metallurgique
EP0337271A1 (de) * 1988-04-13 1989-10-18 Sidmar N.V. Plattenkühler für Schachtöfen

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 10, no. 194 (C-358)[2250], 8 juillet 1986; & JP-A-61-037 904 (NIPPON STEEL CORP.) 22-02-1986 *
PATENT ABSTRACTS OF JAPAN, vol. 12, no. 248 (C-511)[3095], 13 juillet 1988; & JP-A-63-035 708 (NIPPON STEEL CORP.) 16-02-1988 *
PATENT ABSTRACTS OF JAPAN, vol. 12, no. 248 (C-511)[3095], 13 juillet 1988; & JP-A-63-035 709 (NIPPON STEEL CORP.) 16-02-1988 *
PATENT ABSTRACTS OF JAPAN, vol. 13, no. 372 (C-627)[3720], 17 août 1989; & JP-A-1-127 610 (NIPPON STEEL CORP.) 19-05-1989 *
PATENT ABSTRACTS OF JAPAN, vol. 14, no. 211 (C-715)[4154], 2 mai 1990; & JP-A-2-047 211 (KAWASAKI STEEL CORP.) 16-02-1990 *
SOVIET INVENTIONS ILLUSTRATED, semaine 84/20, 27 juin 1984, abrégé no. 84-125381/20, Derwent Publications Ltd, Londres, GB; & SU-A-590 068 (FERR METAL EFFL PURIF) 15-08-1983 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0705906A1 (de) * 1994-10-07 1996-04-10 MAN Gutehoffnungshütte Aktiengesellschaft Kühlplatte für Schachtöfen
EP0741190A1 (de) * 1995-05-05 1996-11-06 MAN Gutehoffnungshütte Aktiengesellschaft Kühlplatten für Schachtöfen
WO2009097832A1 (de) * 2008-02-08 2009-08-13 Sms Siemag Ag Kühlelement zur kühlung der feuerfesten auskleidung eines metallurgischen ofens (ac, dc)
CN102089608A (zh) * 2008-02-08 2011-06-08 Sms西马克股份公司 用于对冶金炉(ac、dc)的耐火内衬进行冷却的冷却元件

Also Published As

Publication number Publication date
EP0430740B1 (de) 1994-07-13
ATE108492T1 (de) 1994-07-15
DE69010639T2 (de) 1995-03-16
CA2029737A1 (fr) 1991-05-15
FR2654438B1 (fr) 1994-04-01
JPH03183708A (ja) 1991-08-09
FR2654438A1 (fr) 1991-05-17
DE69010639D1 (de) 1994-08-18
US5295666A (en) 1994-03-22

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