EP0349513B1 - Thermischer Schutzschild, welcher die Instandsetzung eines Cowpers erlaubt, und Verfahren zur Instandsetzung - Google Patents

Thermischer Schutzschild, welcher die Instandsetzung eines Cowpers erlaubt, und Verfahren zur Instandsetzung Download PDF

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Publication number
EP0349513B1
EP0349513B1 EP89870097A EP89870097A EP0349513B1 EP 0349513 B1 EP0349513 B1 EP 0349513B1 EP 89870097 A EP89870097 A EP 89870097A EP 89870097 A EP89870097 A EP 89870097A EP 0349513 B1 EP0349513 B1 EP 0349513B1
Authority
EP
European Patent Office
Prior art keywords
cushion
resting element
fact
cowper
shield according
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.)
Expired - Lifetime
Application number
EP89870097A
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English (en)
French (fr)
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EP0349513A1 (de
Inventor
Guy Collard
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.)
Stephan Pasek & Cie SA
STEPHAN PASEK AND CIE SA
Original Assignee
Stephan Pasek & Cie SA
STEPHAN PASEK AND CIE SA
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 Stephan Pasek & Cie SA, STEPHAN PASEK AND CIE SA filed Critical Stephan Pasek & Cie SA
Priority to AT89870097T priority Critical patent/ATE93051T1/de
Publication of EP0349513A1 publication Critical patent/EP0349513A1/de
Application granted granted Critical
Publication of EP0349513B1 publication Critical patent/EP0349513B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B9/00—Stoves for heating the blast in blast furnaces
    • C21B9/02—Brick hot-blast stoves
    • C21B9/06—Linings
    • 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
    • C21C5/441—Equipment used for making or repairing linings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H15/00—Tents or canopies, in general
    • E04H15/20—Tents or canopies, in general inflatable, e.g. shaped, strengthened or supported by fluid pressure
    • E04H15/22—Tents or canopies, in general inflatable, e.g. shaped, strengthened or supported by fluid pressure supported by air pressure inside the tent
    • 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 or breaking away 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 or breaking away linings
    • F27D2001/1605—Repairing linings
    • F27D2001/161—Hot repair
    • 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
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D2021/0057—Security or safety devices, e.g. for protection against heat, noise, pollution or too much duress; Ergonomic aspects
    • 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
    • F27D2201/00—Manipulation of furnace parts

Definitions

  • the present invention relates to a thermal insulation shield intended to allow, under acceptable conditions and with good security, repair operations in all applications where thermal insulation and mechanical protection are required, and in the particular case of cowpers. used in steel plants. It also relates to the process by which such a heat shield can be implemented.
  • Cowpers are intended to produce the hot wind necessary for blast furnaces. They produce hot winds that can reach temperatures of around 1260 ° C at their exit from the cowper and the dome lined with refractory silica bricks can reach temperatures of around 1400 ° C.
  • the cowper is an inversion device comprising a beehive of refractory materials and it comprises a generally elliptical section well or chimney extending practically from its base to the dome, that is to say over several tens of meters.
  • a ceramic or other refractory burner is disposed at the bottom of said well or in other cases.
  • Patent FR-A-1 358 186 describes a device constituted by a flexible, inflatable hollow body made of plastic or textile material, allowing repair operations in a converter tank.
  • the main object of the invention is to provide means for working in satisfactory conditions inside a cowper without having to substantially lower the temperature of the dome.
  • the invention aims to provide means allowing said work by protecting workers from falling splinters, rubble, carbuncles or slag resulting for example from local cooling or other causes.
  • the installation of the heat shield must be able to be ensured by using the existing access possibilities without excessive demolitions.
  • a heat shield intended to allow work in steel installations, in particular in cowpers, comprising a cushion formed by a double envelope of composite materials capable of withstanding temperatures at least for the duration of the work. of the order of 800 to 900 ° C, the interior space of which is connected to inlet and outlet sleeves, this interior space which can be inflated using a blower turbine via an inlet sleeve connected to the blower turbine, while maintaining a continuously renewable air circulation by the evacuation cuff; said cushion resting on a suitable heeling element.
  • the cushion can be folded up by rolling it and can be deployed by unwinding on the bed as it is inflated by the blowing turbine.
  • the cushion can therefore be introduced by placing it on the bed in the rolled up state and deploying under the action of the blower.
  • the heeling must itself be designed so as to adapt to the dimensions of the free section of the well of a cowper and be able to be set up so as to pass through an access of reduced dimensions that constitutes the cuff of the valve to sells the cowper hot, arranged along an axis approximately transverse to the pit of the cowper.
  • the housing is advantageously constituted by tubular elements, preferably made of stainless steel.
  • the heeling advantageously consists of two essentially symmetrical side parts and a central part slid over or nestable in the two side parts, the assembled assembly affecting the elliptical shape of the section of the cowper well.
  • At least the two lateral parts each consist of two lateral half-parts which can be folded by a hinge element, one on the other, and which can be described by deploying on the hinge an angle of 180 ° up to a stop.
  • a trellis can be mounted so as to retain a refractory wool between the tubular reinforcing parts of the constituent elements of the bed and external layers of refractory wool can be laid on the bed before bringing the cushion there.
  • the implementation of the equipment described is carried out by accessing the cuff of the cowper's hot-air valve and by resting on the flange of this cuff after dismantling of the compensator to mount two gantries, the two lateral parts of the housing being first introduced into place bringing them vertically to the folded state and then tilting them while deploying the two half-parts of the two lateral parts of the housing ; then, the central part of the heel is slid between the two lateral parts of the heel, thus covering the entire section of the cowper's well. After possible interposition of an additional layer of refractory insulation, the cushion is deposited on the central part of the bed and is deployed under the action of the blowing turbine.
  • the hot-air valve sleeve has the mark 2.
  • the housing consists of two lateral parts, respectively a left part 3 (Figure 1) and a right part 4 (Figure 2) and by a central part 5 (Figure 3).
  • the side part 3 is made of elements tubular, preferably made of stainless steel which constitute a frame and consists of two parts 3a and 3b which can pivot on a hinge 9, one relative to the other as indicated by arrow 7.
  • the constituent elements 3, 4 and 5 of the bed are of an adequate shape to cover the ellipsoidal section of the well and their placement will be described in more detail below.
  • the elements are formed so as to be light and are formed of a frame as shown, preferably lined with insulating and refractory materials, held for example by a wire mesh.
  • It is a double envelope of refractory fabrics whose interior space is in communication with at least one cuff supply of blown air by a blowing turbine and with at least one evacuation sleeve, it being understood that the respective sections of the intake and evacuation sleeves are such that the cushion inflates under the air pressure creating a pressure in the envelopes but allowing adequate air circulation inside it.
  • Tensioners 17 arranged inside the envelopes ensure an arrangement in a suitable shape of the cushion and avoid bursting in the event of overpressure.
  • FIGs 7 and 8 there is shown the mounting of a first gantry in the form of a bracket 20 on the flange of the cuff 2.
  • the gantry 20 (left in this case - see Figure 8) is fixed on a spacer 21 bolted to this flange.
  • the telescopic arm it is possible to advance the element 3 in complete overhang over the cowper well which allows deployment by the hinge 9 to affect the position shown in Figure 12.
  • the movement is controlled by a lever 31 mounted on the end 33 of the telescopic part 23 equipping the gantry. Plates 35 ( Figure 11) welded at an angle block the hinge beyond a 180 ° movement. It therefore becomes possible after deployment to raise the element 3 using the lever so that it occupies its final location where it will be blocked by any appropriate means.
  • the installation of the heeling element 4 is carried out in the same way using a gantry element arranged symmetrically to the first.
  • FIG. 13 shows this operation for the right lateral part 4 of the housing from a position shown in center lines to a position shown in solid lines.
  • the movement is ensured by the lever 31 from its position in center lines to its position in solid lines.
  • the plates 35 prevent rotation beyond 180 ° on the hinge connecting the parts 4a and 4b.
  • FIGS. 14 and 15 show how the cushion is arranged in the folded state and brought to an articulated support 40 to be placed on the central part 5 of the housing and to deploy on the lateral parts 3 and 4.
  • the central heeling element can be simply deposited (as shown in Figure 5) on the side parts 3 and 4 or nest thereon.
  • the heat shield as it is mounted effectively isolates the upper part of the cowper well from the lower part.
  • the workers who will be required to operate in this lower part, under the protection of the heat shield, are thermally insulated and protected against accidental falls of the lining parts which may fall in particular from the dome.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Insulation (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Laminated Bodies (AREA)

Claims (8)

  1. Wärmeisolationsschild, der dazu bestimmt ist, die Ausführung von Arbeiten bei Stahlerzeugungsanlagen, insbesondere bei Cowpers, zu ermöglichen, dadurch gekennzeichnet, daß er ein Kissen (11) aufweist, das von einer doppelten Hülle aus Verbundmaterialien gebildet wird, die Temperaturen von ungefähr 800 bis 900°C aushalten können, wobei der Innenraum dieses Kissens mit Einlaßmanschetten (13) und Auslaßmanschetten (15) verbunden ist, und mit Hilfe einer Gebläseturbine, die mit der Einlaßmanschette (13) verbunden ist, aufgeblasen werden kann, während eine Umwälzung von kontinuierlich erneuerbarer Luft über die Auslaßmanschette (15) aufrechterhalten wird, und wobei das Kissen (11) auf einer geeigneten Unterlage (3, 4, 5) ruht.
  2. Schild gemäß Anspruch 1, dadurch gekennzeichnet, daß das Kissen (11) eingerollt werden kann, und in dem Maße, wie es durch die Gebläseturbine aufgeblasen wird, auf der Unterlage (3, 4, 5) ausgerollt werden kann.
  3. Schild gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Unterlage (3, 4, 5) so ausgelegt ist, daß sie sich an die Abmessungen des lichten Querschnitts des Schachtes eines Cowpers anpaßt, und über einen Zugang mit geringen Abmessungen, der von der Manschette (2) des Heißwindschiebers eines solchen Cowpers gebildet wird, angebracht werden kann.
  4. Schild gemäß Anspruch 3, dadurch gekennzeichnet, daß die Unterlage von rohrförmigen Elementen, vorzugsweise aus nichtrostendem Stahl, gebildet wird.
  5. Schild gemäß Anspruch 3 oder 4, dadurch gekennzeichnet, daß die Unterlage gebildet wird von zwei seitlichen Teilen (3, 4), die im wesentlichen symmetrisch sind, und einem mittleren Teil (5), der auf die zwei seitlichen Teile (3, 4) aufgeschoben oder aufgesteckt werden kann, wobei die montierte Einheit die elliptische Form des Schachtquerschnitts aufweist.
  6. Schild gemäß Anspruch 5, dadurch gekennzeichnet, daß jeder der zwei seitlichen Teile (3, 4) aus zwei seitlichen Abschnitten (3a, 3b bzw. 4a, 4b) besteht, die mittels eines Elements, das ein Scharnier (9) bildet, zusammengeklappt werden können, und beim Auseinanderklappen um das Scharnier (9) einen Winkel von 180° bis zu einem Anschlag (35) beschreiben können.
  7. Schild gemäß irgendeinem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß ein Gitter so angebracht ist, daß eine feuerfeste Wolle zwischen rohrförmigen Skelett-Partien der Bestandteile der Unterlage (3, 4, 5) zurückgehalten wird, wobei äußere Schichten aus feuerfester Wolle eventuell auf die Unterlage (3, 4, 5) gelegt werden können, bevor das Kissen (11) darauf aufgebracht wird.
  8. Verfahren zur Verwirklichung eines Schilds gemäß irgendeinem der Ansprüche 1 bis 7 in einem Cowper, dadurch gekennzeichnet, daß der Zugang zu der Manschette (2) des Heißwindschiebers freigelegt wird, und nach Ausbau des Kompensators auf dem Flansch dieser Manschette zwei Portalrahmen (20) montiert werden, und dann zwei seitliche Teile (3, 4) der Unterlage (3, 4, 5) nacheinander eingebracht werden, wozu sie im zusammengeklappten Zustand vertikal eingeführt werden und danach geneigt werden, während die zwei Abschnitte (3a, 3b bzw. 4a, 4b) der zwei seitlichen Teile (3, 4) der Unterlage (3, 4, 5) auseinandergeklappt werden; danach der mittlere Teil (5) der Unterlage (3, 4, 5) zwischen die zwei seitlichen Teile (3, 4) der Unterlage geschoben wird, wobei der gesamte Querschnitt des Schachts bedeckt wird; nach eventueller Aufbringung einer zusätzlichen Schicht aus feuerfestem Isolationsmaterial das Kissen (11) schließlich im eingerollten Zustand auf den mittleren Teil (5) der Unterlage (3, 4, 5) aufgebracht wird und infolge der Wirkung einer Gebläseturbine oder einer anderen Druckluftquelle ausgerollt wird.
EP89870097A 1988-07-01 1989-06-19 Thermischer Schutzschild, welcher die Instandsetzung eines Cowpers erlaubt, und Verfahren zur Instandsetzung Expired - Lifetime EP0349513B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89870097T ATE93051T1 (de) 1988-07-01 1989-06-19 Thermischer schutzschild, welcher die instandsetzung eines cowpers erlaubt, und verfahren zur instandsetzung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE8800769 1988-07-01
BE8800769A BE1002086A4 (fr) 1988-07-01 1988-07-01 Bouclier d'isolation thermique destine a permettre la refection de cowpers et procede pour sa mise en oeuvre.

Publications (2)

Publication Number Publication Date
EP0349513A1 EP0349513A1 (de) 1990-01-03
EP0349513B1 true EP0349513B1 (de) 1993-08-11

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Application Number Title Priority Date Filing Date
EP89870097A Expired - Lifetime EP0349513B1 (de) 1988-07-01 1989-06-19 Thermischer Schutzschild, welcher die Instandsetzung eines Cowpers erlaubt, und Verfahren zur Instandsetzung

Country Status (5)

Country Link
EP (1) EP0349513B1 (de)
AT (1) ATE93051T1 (de)
BE (1) BE1002086A4 (de)
DE (1) DE68908292D1 (de)
ES (1) ES2044226T3 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1272206B (it) * 1994-04-15 1997-06-16 Ilva Laminati Piani Dispositivo per la protezione del personale durante la manutenzione del rivestimento interno di convertitori, camini e simili.
EP1889926A1 (de) * 2006-08-15 2008-02-20 Danieli Corus Technical Services BV Verfahren zum Stabilisieren einer feuerfesten Inner-Auskleidung eines Winderhitzers sowie Verwendung davon in einem Verfahren zur Heizreparatur
GB201117341D0 (en) * 2011-10-07 2011-11-23 Siemens Vai Metals Tech Ltd Heat shield

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1358186A (fr) * 1963-05-30 1964-04-10 Beteiligungs & Patentverw Gmbh Dispositif propre à empêcher les accidents lors de l'exécution de travaux dans les convertisseurs et analogues comportant des cuves pourvues d'un garnissage
FR1566305A (de) * 1968-01-29 1969-05-09
ZA738487B (en) * 1972-11-18 1974-09-25 T Gilchrist Insulation panel
GB1471430A (en) * 1974-11-14 1977-04-27 Kortvelyessy L High-temperature heat insulation shield
US4484420A (en) * 1980-08-01 1984-11-27 Stokes Charlie M Flexible enclosure for protecting materials or things
US4382778A (en) * 1981-09-04 1983-05-10 Noranda Mines Limited Method and apparatus for reducing excess air inleakage into an open ring-type carbon baking furnace

Also Published As

Publication number Publication date
DE68908292D1 (de) 1993-09-16
BE1002086A4 (fr) 1990-06-26
ATE93051T1 (de) 1993-08-15
EP0349513A1 (de) 1990-01-03
ES2044226T3 (es) 1994-01-01

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