EP1233077B1 - Reparaturvorrichtung der Auskleidung einer Hochofenabstichöffnung - Google Patents

Reparaturvorrichtung der Auskleidung einer Hochofenabstichöffnung Download PDF

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Publication number
EP1233077B1
EP1233077B1 EP02380017A EP02380017A EP1233077B1 EP 1233077 B1 EP1233077 B1 EP 1233077B1 EP 02380017 A EP02380017 A EP 02380017A EP 02380017 A EP02380017 A EP 02380017A EP 1233077 B1 EP1233077 B1 EP 1233077B1
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EP
European Patent Office
Prior art keywords
taphole
gun
nozzle
sleeve
stopper
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
EP02380017A
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English (en)
French (fr)
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EP1233077A1 (de
Inventor
Emilio Martinez De Valverde
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.)
Productos Refractarios Asturianos Para La Siderurg IA SA
Original Assignee
Productos Refractarios Asturianos Para La Siderurg IA SA
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Publication date
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Publication of EP1233077A1 publication Critical patent/EP1233077A1/de
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/12—Opening or sealing the tap holes

Definitions

  • This invention refers to a new system for repairing the facings of blast furnace tapholes, with which it is possible to lengthen the useful life of the taphole, especially in view of the continuous use of the hot bar technique, furthermore allowing that repairs can be carried out without the need for stopping the installation.
  • a blast furnace is a vertical reactor that is loaded through its upper part or mouth with a series of minerals and solid fuels, so that with the injection of hot air and additional fuel, gas, coal, etc., a reduction reaction is obtained that gives rise to pig iron, the fundamental prime material for obtaining the different types of steels, foundry products, etc.
  • This reactor is emptied by means of an outlet located in its lower part, called a taphole, with a diameter of the order of 30 to 60 millimetres and with a length generally between 1 and 3 metres, depending on the type of blast furnace, a taphole through which the pig iron and slag leave and that is one of the critical parts in the operation of a blast furnace.
  • a machine similar to a drill of large dimensions that uses as a bit a bar of approximately three meters length that works simultaneously turning and hammering, axially perforated to refrigerate the cutting head, whether with water, compressed air, or nitrogen, etc.
  • a machine called a taphole stopper gun is used that consists of a hydraulic system with a pressure of up to 400 Kg/cm 2 , that, using a piston and a plunger, injects the taphole material to close the hole made by the bit during the opening.
  • the hot bar system consists of inserting a solid bar once in the taphole once the material has been injected with the gun and before the material hardens, with the purpose of later taking it out and that the pig iron and the slag come out through the space left by the extraction of this bar.
  • This system has the drawback that the mass of material has to be sufficiently hard to tolerate the pressure of the interior of the blast furnace, up to 4 Kg/cm 2 , to avoid that this material be expelled to the exterior, and sufficiently soft that it allows the bar to enter and afterwards to be withdrawn. Meanwhile the drilling method doesn't have operational problems, but it is a more expensive and less effective system that the hot bar method, because of which there is a tendency to use the most efficient method provided the working conditions of the installation and the material used are adequate.
  • the objective is to set a series of parameters, such as:
  • the hot bar system furthermore has the drawback of progressively causing damage to the facing of the blast furnace taphole, a facing on which the taphole stopper gun does the closing and that has the following as its main functions:
  • Document DE19755932C refers to a tapping hole plugging machine for metallurgical furnaces that incorporates a plugging gun provided with a pressure cylinder and a plugging piston for pressing the plug material out of a nozzle of the pressure cylinder, the machine further comprising an end piece which is slidable relative to the nozzle and which is pressed on the furnace wall in the tapping hole zone for sealing purposes.
  • the system is based on equipping the gun nozzle with a sleeve perfectly adjusted to this nozzle, that forms an axial and frontal extension for it and in whose cavity is housed a ring of refractory material, that in the connecting of the gun to the taphole face fills the existing hollow in this face, caused by wear in the normal use of the taphole, so that this ring, of an external diameter the same as the internal diameter of the sleeve, will adapt a variable position, according to requirements determined by the depth of taphole facing wear.
  • the sleeve will be equipped with complementary external limit stops, beside its front end, that in the joining of the taphole stopper gun with the face of the taphole, on impacting on it, will cause the retraction of this sleeve with respect to the nozzle, while the latter advances to the taphole and introduces the refractory ring in its wear depression, where it remains definitively fixed to the plugging material of the oft-mentioned furnace taphole.
  • the ring (12) allowing the passing of the blocking material through it, reaches the interior of the opening (9) of the taphole where it remains freed by the retraction of the sleeve (11) to which effect this latter has limit stops (13), radial and external, touching against the face (8) of the taphole, as seen especially in figure 3, so that the material supplied by the gun (7) doesn't only block the taphole opening (5) but also fills the gaps established between the deteriorated face of the taphole and the refractory ring (12), the latter remaining fixed and integrated in the taphole, so that the face of the taphole (8) remains automatically ready and in optimum conditions if a ring of adequate size (12) has been used, as shown in figure 4.

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  • 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)

Claims (2)

  1. System zum Reparieren von Oberflächen einer Gewindebohrung eines Hochofens, deren Zweck es ist, die Öffnung (9) mit Brechungsmaterial oder anderem Material zu füllen, die sich stufenweise auf der Oberfläche (8) der Gewindebohrung (5) bildet, aufgrund der Einwirkung einer Absperrdüse (7) der Gewindebohrung auf diese Oberfläche bei der Blockierung der Gewindebohrung, wobei besagte Absperrdüse (7) der Gewindebohrung mit einer Mündung (10) versehen wird, dadurch gekennzeichnet, dass es über eine axiale Verlängerung der Mündung (10) verfügt, die aus einer Muffe (11) besteht, die von dieser zurückgezogen werden kann und über äussere Anschläge (13) verfügt, die dazu ausgelegt sind, auf die Oberfläche (8) der Gewindebohrung (5) einzuwirken, was die Feststellung der Muffe (11) während der Endphase des Vorlaufs der Mündung (10) der Absperrdüse (7) der Gewindebohrung bewirkt, wobei die Muffe (11) über einen Brechungsring (12) verfügt, der sich im Verhältnis zur Mündung (10) weiter vorne an der Muffe (11) befindet und von der Mündung (10) in das Innere der Öffnung (9) der Gewindebohrung (5) eingeführt wird, wobei sich der Brechungsring (12) desweiteren erlaubt, dass das von der Düse (7) gelieferte Material hindurchgelassen wird und weiterhin durch die selbe Masse von Verschlussmaterial, das durch die Düse (7) zugeführt wird, in die Öffnung (9) der Abnutzungsoberfläche der Gewindebohrung (5) integriert ist.
  2. System zum Reparieren der Oberflächen von Gewindebohrungen eines Hochofens, gemäss Anspruch 1, dadurch gekennzeichnet, dass die Muffe (11) einen ähnlichen inneren Durchmesser aufweist wie der äussere Durchmesser der Mündung (10) der Absperrdüse (7), um sich angemessen auf dieser zu bewegen, während der Brechungsring (12) hingegen einen ähnlichen äusseren Durchmesser hat wie der innere Durchmesser der Muffe (11) und variable axiale Ausmasse gemäss des Verschleisses der Oberfläche der Gewindebohrung, der im Verhältnis zur Tiefe der Öffnung (9) steht.
EP02380017A 2001-02-15 2002-01-29 Reparaturvorrichtung der Auskleidung einer Hochofenabstichöffnung Expired - Lifetime EP1233077B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200100338A ES2197738B1 (es) 2001-02-15 2001-02-15 Sistema para reparar los frontales de piquera en alto horno.
ES200100338 2001-02-15

Publications (2)

Publication Number Publication Date
EP1233077A1 EP1233077A1 (de) 2002-08-21
EP1233077B1 true EP1233077B1 (de) 2006-04-05

Family

ID=8496737

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02380017A Expired - Lifetime EP1233077B1 (de) 2001-02-15 2002-01-29 Reparaturvorrichtung der Auskleidung einer Hochofenabstichöffnung

Country Status (3)

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EP (1) EP1233077B1 (de)
DE (1) DE60210357D1 (de)
ES (1) ES2197738B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4823626B2 (ja) * 2005-09-26 2011-11-24 新日本製鐵株式会社 高炉炉底極小空隙への骨材圧入方法
CN103966375B (zh) * 2014-04-21 2017-09-12 鞍钢股份有限公司 一种高炉泥套的修补方法及辅助装置
RU2017135253A (ru) 2015-04-10 2019-04-09 Секисуй Кемикал Ко., Лтд. Промежуточный слой для многослойного стекла, многослойное стекло, способ изготовления гравированного валика для тиснения и способ изготовления промежуточного слоя для многослойного стекла

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4828226A (en) * 1987-10-16 1989-05-09 Foseco International Limited Tap hole plugs for metallurgical vessels
DE3803132A1 (de) * 1988-02-03 1989-08-17 Dango & Dienenthal Maschbau Verfahren und stopfkanone zum schliessen des stichlochs von oefen
FR2664291B1 (fr) * 1990-07-05 1992-09-18 Boulonnais Terres Refractaires Dispositif pour la refection rapide d'un placard de haut-fourneau.
FR2680179B1 (fr) * 1991-08-07 1994-10-21 Boulonnais Terres Refractaires Perfectionnements apportes aux dispositifs de bouchage de trous de coulee de hauts-fourneaux.
DE19755932C1 (de) * 1997-12-17 1998-12-10 Dango & Dienenthal Maschbau Stichlochstopfmaschine für metallurgische Öfen
EP1069191B1 (de) * 1999-07-07 2005-09-28 Von Roll Umwelttechnik AG Abstichvorrichtung sowie Abstichverfahren

Also Published As

Publication number Publication date
EP1233077A1 (de) 2002-08-21
ES2197738A1 (es) 2004-01-01
ES2197738B1 (es) 2005-03-16
DE60210357D1 (de) 2006-05-18

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