EP2733451B1 - Élément de refroidissement pour fours métallurgiques - Google Patents

Élément de refroidissement pour fours métallurgiques Download PDF

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Publication number
EP2733451B1
EP2733451B1 EP12007725.0A EP12007725A EP2733451B1 EP 2733451 B1 EP2733451 B1 EP 2733451B1 EP 12007725 A EP12007725 A EP 12007725A EP 2733451 B1 EP2733451 B1 EP 2733451B1
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EP
European Patent Office
Prior art keywords
profile
cooling element
element according
profiles
cooling
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.)
Active
Application number
EP12007725.0A
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German (de)
English (en)
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EP2733451A1 (fr
Inventor
Frank Böert
Christof Dratner
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KME Special Products GmbH and Co KG
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KME Germany GmbH
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Priority to EP12007725.0A priority Critical patent/EP2733451B1/fr
Publication of EP2733451A1 publication Critical patent/EP2733451A1/fr
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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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/12—Casings; Linings; Walls; Roofs incorporating cooling arrangements
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/10—Cooling; Devices therefor
    • 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
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/24—Cooling arrangements
    • 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
    • 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
    • F27D1/0003—Linings or walls
    • F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific characteristics
    • 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
    • F27D1/04—Casings; Linings; Walls; Roofs characterised by the form, e.g. shape of the bricks or blocks used
    • F27D1/06—Composite bricks or blocks, e.g. panels, modules
    • F27D1/063—Individual composite bricks or blocks
    • F27D1/066—Individual composite bricks or blocks made from hollow bricks filled up with another material
    • 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
    • F27D2009/0002—Cooling of furnaces
    • F27D2009/0018—Cooling of furnaces the cooling medium passing through a pattern of tubes
    • F27D2009/0032—Cooling of furnaces the cooling medium passing through a pattern of tubes integrated with refractories in a panel

Definitions

  • the invention relates to a cooling element for metallurgical furnaces, in particular shaft furnaces, for example blast furnaces, according to the features in the preamble of patent claim 1.
  • Cooling elements are used to protect the wall of the oven, such as a blast furnace, from overheating, as well as from abrasive wear, thermomechanical and thermochemical attacks.
  • the installation of cooling elements on the inside of the furnace wall reduces or even prevents such attacks.
  • cooling elements for. B. cylindrical or oval cooling tubes.
  • cooling boxes or cooling plates as well as the state of the art, such as area-covering cooling elements, so-called staves, which consist of various metallic materials, preferably steel, gray cast iron and copper.
  • staves which consist of various metallic materials, preferably steel, gray cast iron and copper.
  • combinations of punctual and area-covering cooling elements are known.
  • Protective layers are provided to protect the cooling element surfaces. These serve as wear and collision protection. They are made of refractory, unshaped and shaped ceramic materials in different thicknesses up to approx. 250 mm.
  • inserts in receptacles which are arranged on the furnace interior facing the hot side of the cooling plate, known.
  • the shots are mostly grooves with an undercut. As a rule, they are dovetail-like grooves which accommodate both unshaped and shaped refractory materials, graphite, steel, cast steel or gray cast iron.
  • All these materials have a comparatively low thermal conductivity compared to copper and are therefore unable to freeze a protective layer on the surface of the cooling element.
  • An increase in the abrasion resistance by various uses in the recordings of the cooling plate or a change in the coating on the cooling element surfaces taken alone has proven to be ineffective.
  • the so-called metallization zone where in some cases very high process and operating temperatures and high heat flows with superimposed temperature and heat flow changes, the abrasion resistance could not be increased sufficiently.
  • a base body is to be formed by an open-pore silicon carbide ceramic, preferably nitride-bonded silicon carbide, while the second ceramic material of the furnace inside arranged plate-shaped components by a dense silicon carbide, preferably reaction bonded, silicon-infiltrated silicon carbide (SiSic) is formed.
  • SiSic silicon-infiltrated silicon carbide
  • a lining of a furnace with a refractory material is known, wherein the refractory material z. B. consists of graphite.
  • the refractory material is traversed inside by tubes through which a cooling medium is passed.
  • a further refractory material is arranged in groove-shaped recesses on the refractory material.
  • the material may be silicon carbide.
  • the EP 0 008 261 A1 discloses a lining for smelting furnaces in which inside steel columns are cast in blocks of refractory material. These internal pillars have a high thermal conductivity and serve to deliver the heat from the interior of the refractory material to the furnace wall. This is intended to improve the service life of the refractory material.
  • the EP 1 069 389 A1 includes a water-cooled metal cooling element of the prior art, in which refractory profile components are arranged on a hot side facing the interior of the furnace. The refractory profile components are easily replaceable, whereby the life of the cooling element can be extended altogether.
  • a refractory brick lining for a cooling element of a blast furnace wherein the bricks are anchored by means of fastening bolts in the cooling plate.
  • a material for the brick inter alia, nitridically bonded silicon carbide is proposed.
  • the object of the invention is to provide a cooling element which has the ability to freeze and to obtain protective layers and at the same time has an increased abrasion resistance.
  • the cooling element according to the invention is characterized in that it comprises at least one profile component which is inserted into the receptacles on the hot side of the cooling plate in a positive, non-positive or cohesive manner.
  • a profile component exists at least partly from a high-performance ceramic based on non-oxide-ceramic materials.
  • the so-called high-performance ceramic materials in the context of the invention are materials according to the standard DIN ENV 12212 (such as, for example, silicon-infiltrated, reaction-bonded silicon carbide, abbreviation SBSiC). With these materials, it is possible to solve the above problem. In particular, it is possible that the operator of a metallurgical furnace, in particular a blast furnace, is not forced, proven modes of operation, for. B. middle-rate driving with higher specific pig iron production rates, in favor of longer life of the cooling elements give up or change.
  • cooling elements in their basic structure also need not be changed.
  • novel profile components from at least partially, in particular on the outside, high-performance ceramic materials are used. These materials can be produced by continuous casting. Preferably, they have a thermal conductivity of more than 120 W / mK. The thermal conductivity is in particular in a range of 120 to 150 W / mk. In addition, they are characterized by high fire resistance up to 1550 ° C. At the same time they are extremely temperature change resistant. The abrasion resistance is preferably in a range ⁇ 0.5 cm 3 (ASTM C 704).
  • the said profile components made of at least partially high-performance ceramic materials can be used not only in cooling elements made of rolled materials, but also in cast cooling elements.
  • the high-performance ceramic materials belong to the group of non-oxide-ceramic materials based on SiC.
  • the profile components can be full or open profiles.
  • a hollow profile according to the invention is in particular a circumferentially closed hollow profile.
  • Such hollow profiles can be produced easily in a continuous casting process and also save material. It is therefore possible to use hollow profiles, which are additionally provided on the inside with a refractory material.
  • the mass is also resistant to wear and easily processed as a self-fluxing material, so that cavities within the profile component can be completely poured or filled.
  • the mass is cured after casting.
  • a hollow structure according to the invention refers to a circumferentially open or closed contour.
  • Such arms provided with arms can also be combined with a hollow profile, for example by a circular or polygonal core is designed as a hollow profile, are arranged on the outside virtually quasi radially projecting arms. The arms then extend in the direction of the outer hollow profile. The reverse arrangement is conceivable, namely the arms protrude from the outer hollow profile to the interior of the hollow profile.
  • Arms according to the invention are webs or continuous projections, as they can be easily produced by the continuous casting process.
  • the wall thickness of the profiles or hollow profiles can vary widely over the circumference of a profile.
  • the invention is therefore not limited to a particular profile geometry. Decisive is that the profile component has a total of a very high thermal conductivity and protects against abrasive wear.
  • a gap between the receptacle and the profile component may be filled with the refractory material.
  • the heat transfer between the profile component and the recording is additionally improved.
  • the refractory material in or between the profiles is in particular a non-oxide ceramic material.
  • the refractory materials for filling gaps and spaces are a self-flowing, that is castable, amorphous ceramic, unshaped, refractory SiC material, preferably the group LCC (low cement castable). Through this material, the various profiles are connected and anchored.
  • the refractory, unshaped material can also consist of a mixture of recycled high performance ceramics, in particular RBSiC high performance ceramics and a refractory, non-oxide ceramic SiC mass which is particularly low in cements (Group LLC).
  • At least one of the profiles preferably consists of a refractory material of group HA65.
  • This material is for example a high alumina, refractory material with at least 65% Al2O3 content.
  • the profile component which comes into contact with the receptacle of the cooling plate, is preferably trapezoidal in cross section. It may protrude a piece from the cooling element.
  • the outer profile component may have an undercut in its region protruding from the receptacle of the cooling plate. This undercut can serve to provide a positive anchoring of a refractory wear protection layer. This can be applied at the factory or also form during operation, so that even for forming, frozen wear protection layers anchoring is provided.
  • FIG. 1 shows a cooling element 1 a, which on a wall, the so-called tank 2 of a metallurgical furnace, not shown, in particular a shaft furnace, such. B. a blast furnace, is attached.
  • the cooling element 1 a comprises a cooling plate 3 a, with coolant channels 4 extending in the interior, which are supplied with coolant via coolant connections 5, 6 on a cold side of the cooling plate 3 a in a manner not shown.
  • the coolant connections 5, 6 pass through the wall 2.
  • a fastening element 7 serves to fix the cooling element 1 a to the tank 2.
  • the cooling plate 3 On the inside of the furnace facing hot side, that is in the image plane right, are located on the cooling plate 3a groove-shaped receptacles 8, which are each bounded by webs 9.
  • the groove-shaped receptacles 8 extend horizontally.
  • the groove-shaped receptacles 8 preferably have a dovetail-shaped cross-section.
  • the groove-shaped receptacles 8 serve to receive profile components 10a.
  • the profile components 10a are produced by continuous casting. They consist of a high-performance ceramic. They are adapted in their cross section to the contour of the receptacle 8 and are held in a form-fitting manner in the receptacle 8.
  • the profile components 10a protrude a short distance over the hot side of the webs 9, so that the surface 11 of the cooling plate 3a set back from the profile components 10a is protected from abrasive wear.
  • FIG. 2 shows a further embodiment, for example, a Gußstave cooling element 1 b with profile components 10b, which are arranged in groove-shaped receptacles 8 a cooling plate 3b.
  • the cooling element 1b is made of gray cast iron.
  • the arrangement of the grooves 8, 9 and the geometry of the profile elements 10b is to the comments too FIG. 1 Referenced. Identical components were provided with the already introduced reference numerals.
  • FIG. 3 shows in a detailed representation of the basic shape of such a profile component 10a.
  • the profile component 10a has a multi-part construction. It comprises a hollow profile 12. In this embodiment, it is trapezoidal in cross section. The hollow section 12 is closed circumferentially. It has a filling of a refractory material 13th
  • the profile element 10a therefore consists of two different materials.
  • the hollow profile 12 made of high-performance ceramic materials produced by continuous casting is characterized by extremely high abrasion resistance and very high thermal conductivities of up to 150W / mK and also by extremely high refractoriness up to 1550 ° C and high thermal shock resistance. It consists of a high-performance ceramic material, for example silicon-infiltrated, recrystallized silicon nitride.
  • the refractory material 13 consists of a self-fluxing in the processing state, amorphous-ceramic, unshaped, refractory material.
  • This SiC mass belongs to the group LCC (low cement castable).
  • This refractory material 13 can also be used to anchor other profiles that are located within the outer hollow section 12.
  • FIG. 4 shows a profile member 10c, in turn, that of FIG. 3 known outer hollow section 12 includes, but in addition a further, internal profile 14 has.
  • the inner, hollow profile 14 may have a smaller wall thickness and additionally has arms 15 which point from the corners of the substantially rectangular or trapezoidally configured inner profile 14 to the corners of the outer hollow profile 12.
  • the spaces are in turn filled with the refractory material 13, as it is also in FIG. 3 is shown.
  • the core ie the interior of the profile component 10c, is additionally made even more wear-resistant and even more thermally conductive.
  • FIG. 5 shows an alternative embodiment of a profile component 10d. Notwithstanding the embodiment of the FIG. 4 has the inner profile 16 in addition to the arms 15 in the corners more arms 17 in the region of the upper and lower longitudinal side of the profile designed as a hollow profile 16. All remaining spaces are in turn filled with the refractory material 13.
  • FIG. 6 shows a profile component 10e, which in turn comprises the outer hollow profile 12 and additionally an inner profile 18. They are both trapezoidal in cross section, so that the inner profile 18 is substantially equidistant from the walls of the outer profile 12.
  • the interstices are in turn filled with the refractory material 13, as well as the interior of the inner profile 18th
  • FIG. 7 shows an embodiment of a profile component 10f, which, in contrast to the embodiment of the FIG. 6 still a third profile 19 includes, which in turn is surrounded by the middle profile 18 and the outer hollow section 12.
  • the profiles 12, 18, 19 are spaced equidistant, resulting in a multiple interleaving.
  • Interspaces are in turn filled with the refractory material 13, as well as the interior of the inner profile 19th
  • FIG. 8 shows a variant of a profile component 10g, in which the outer hollow profile 12 receives an inner profile 20, which is not a hollow profile unlike in all previous embodiments. It includes a horizontal bar. From the horizontal web go up and down from each three transverse webs, so that the shape of two adjacent letters H results. The gaps are in turn filled with the refractory material. The outer webs of the profile 20 are slightly inclined relative to the vertical direction of the central web, so that there is a constant distance to the outer hollow member 12 in the region of the outer webs.
  • FIG. 9 shows an application in which a cooling element 1 c is shown in partial section.
  • the special feature of this cooling element 1 c is that two different types of profile components 10a, 10h are used alternately.
  • the profile element 10h further projects beyond the hot side of the cooling plate 3c so that it grips into a wear protection layer 21 and anchors it to the hot side of the cooling plate 3c.
  • the profile component has 10h on both sides undercuts, which in the representation of FIG. 9 extend into the picture plane.
  • the profile component 10h from the groove bottom to Nutmündung forth in adaptation to the dovetail shape of the groove younger and widened in the same way and at the same distance from the groove again. This creates an hourglass-shaped constriction, behind which the wear-resistant layer 21 can dig in a form-fitting manner.
  • the profile member 10h is filled with the refractory material 13, as is the case with the above embodiments.
  • the embodiment of the FIG. 10 differs from the previous one in that instead of the profile components 10a solid, amorphous ceramic, abrasion-resistant, shaped refractory profile components 22 of material group HA65 or non-oxide ceramic SiC grades are used alternately to the profile components 10a in the grooves of the cooling plate 3d. Also in this embodiment is a wear protection layer 21 on the hot side of the cooling plate 3d. In addition, the explanation of the FIG. 9 Referenced.
  • FIG. 11 shows an embodiment of a cooling element 1 e, which differs from that of the FIG. 1 differs in that slightly smaller profile components 10i are used in the cooling plate 3e in cross-section, which are still held in a form-fitting manner in the dovetail-shaped undercut receptacles 8.
  • the resulting gap between the profile components 10i and the receptacles 8 is filled with a refractory adhesive material 24.
  • the temperature-resistant ceramic adhesive material is based on polymer.
  • FIG. 12 finally shows in addition to FIG. 11 , the back of the cooling plate 3f fasteners 23 are used, which point in the direction of the hot side of the cooling plate 3f and the profile components 10i anchored in the receptacles 8 additionally.
  • these are screw connections, which are respectively arranged centrally behind one of the receptacles 8 or off-center, so that each individual profile component 10i is anchored.
  • FIG. 13 shows an open profile member 10j, unlike the closed profile components 10a - i is not located exclusively between the webs 9, but each embraces a web 9.
  • the webs 9 have on both sides undercuts, wherein the open profile component 10j squeezes into the undercuts and is thereby held in a form-fitting manner on the respectively engaged web 9.
  • the webs 9 are trapezoidal in cross-section, so that the profile components 10j are trapezoidal with a constant wall thickness.

Claims (19)

  1. Élément de refroidissement pour fours métallurgiques, avec une plaque de refroidissement métallique (3a à f) avec des canaux de liquide de refroidissement (4) qui s'étendent à l'intérieur et auxquels sont fixés des éléments profilés réfractaires (10a à j, 22) qui se placent dans des logements (8) qui sont agencés du côté chaud, proche de l'intérieur du four, de la plaque de refroidissement (3a à f), caractérisé en ce qu'au moins un élément profilé (10a à j) est au moins en partie en une céramique à haute performance à base de matière céramique non oxydée.
  2. Élément de refroidissement selon la revendication 1, caractérisé en ce que, pour geler une couche de protection, la céramique à haute performance a une conductivité thermique d'au moins 120 W/mK et une résistance au feu allant jusqu'à 1550°C.
  3. Élément de refroidissement selon la revendication 2, caractérisé en ce que la conductivité thermique est comprise entre 120 et 150 W/mK.
  4. Élément de refroidissement selon l'une des revendications 1 ou 3, caractérisé en ce qu'au moins un élément profilé (10a à i) comprend au moins un profilé creux (12).
  5. Élément de refroidissement selon la revendication 4, caractérisé en ce que le profilé creux (12) est en une céramique à haute performance qui est résistante à l'abrasion et qui a une bonne conductivité thermique.
  6. Élément de refroidissement selon la revendication 4 ou 5, caractérisé en ce qu'un matériau réfractaire (13) est agencé à l'intérieur du profilé creux (12).
  7. Élément de refroidissement selon l'une des revendications 4 ou 5, caractérisé en ce que plusieurs profilés (14, 16, 18 à 20) et profilés creux (12) sont agencés emboîtés les uns dans les autres.
  8. Élément de refroidissement selon la revendication 7, caractérisé en ce que les profilés (14, 16, 18 à 20) sont en une céramique à haute performance qui est résistante à l'abrasion et qui a une bonne conductivité thermique.
  9. Élément de refroidissement selon la revendication 6 ou 7, caractérisé en ce qu'au moins l'un des profilés intérieurs (14, 16, 18, 19) est un profilé creux.
  10. Élément de refroidissement selon la revendication 7 à 9, caractérisé en ce qu'au moins l'un des profilés (14, 16, 20) a des bras (15, 17) qui s'étendent à partir de la paroi d'un profilé (14, 16, 20) en direction de la paroi d'un autre profilé (14, 16, 20) ou profilé creux (12).
  11. Élément de refroidissement selon l'une des revendications 7 à 10, caractérisé en ce qu'un matériau réfractaire (13) est agencé dans les espaces entre des profilés (12, 14, 16, 18 à 20) emboîtés les uns dans les autres de telle sorte que tout l'espace intérieur entouré par le profilé creux extérieur (12) est rempli.
  12. Élément de refroidissement selon l'une des revendications 6 à 11, caractérisé en ce que le matériau réfractaire (13) dans ou entre les profilés (14, 16, 18 à 20) et le profilé creux (12) est une matière céramique non oxydée.
  13. Élément de refroidissement selon l'une des revendications 1 à 12, caractérisé en ce qu'une fente entre le logement (8) en forme de rainure et l'élément profilé (10i, j) est remplie d'une colle céramique (24) réfractaire.
  14. Élément de refroidissement selon l'une des revendications 1 à 13, caractérisé en ce que l'élément profilé (10a à j) a une section transversale en forme de trapèze.
  15. Élément de refroidissement selon l'une des revendications 1 à 14, caractérisé en ce que l'élément profilé (10i) présente, dans sa zone dépassant du logement en forme de rainure (8) de la plaque de refroidissement (3c), une contre-dépouille pour l'ancrage par concordance de forme d'une couche réfractaire de protection contre l'usure (21).
  16. Élément de refroidissement selon l'une des revendications 1 à 15, caractérisé en ce que, dans les logements en forme de rainures (8), des éléments profilés (10a à i) avec des profilés creux et les éléments profilés en céramique massive (22) sont agencés en alternance.
  17. Élément de refroidissement selon l'une des revendications 1 à 16, caractérisé en ce que les éléments profilés (10i) sont ancrés sur la plaque de refroidissement (3f) par concordance de forme par l'intermédiaire d'éléments de fixation (23) supplémentaires.
  18. Élément de refroidissement selon l'une des revendications 6 à 17, caractérisé en ce que le matériau réfractaire non formé (13) est en un mélange d'une céramique à haute performance RBSiC recyclée et d'une masse SiC réfractaire de céramique non oxydée.
  19. Élément de refroidissement selon l'une des revendications 1 à 18, caractérisé en ce que la céramique à haute performance a une résistance à l'abrasion selon ASTM C 704 inférieure à 0,5 cm3.
EP12007725.0A 2012-11-15 2012-11-15 Élément de refroidissement pour fours métallurgiques Active EP2733451B1 (fr)

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DE102014220575A1 (de) * 2014-10-10 2015-10-29 Siemens Vai Metals Technologies Gmbh Feuerfestbauteil zum Auskleiden eines metallurgischen Gefäßes
AU2017220495B2 (en) 2016-02-18 2019-11-14 Hatch Ltd. Wear resistant composite material, its application in cooling elements for a metallurgical furnace, and method of manufacturing same
DE102016107284A1 (de) 2016-04-20 2017-10-26 Kme Germany Gmbh & Co. Kg Kühlplatte für ein Kühlelement für metallurgische Öfen

Citations (1)

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Publication number Priority date Publication date Assignee Title
LU88629A1 (fr) * 1994-07-18 1995-10-02 Centre Rech Metallurgique Garnissage de protection en briques rétractaires pour un caisson de refroidissement d'un four industriel

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FR2433164A1 (fr) * 1978-08-08 1980-03-07 Produits Refractaires Blocs a base d'oxydes refractaires electrofondus armes d'un element en un materiau d'une conductivite thermique elevee
NL8700293A (nl) * 1987-02-09 1988-09-01 Hoogovens Groep Bv Wandconstructie voor een ovenwand voorzien van koelelementen.
EP1069389A4 (fr) * 1999-02-03 2001-04-25 Nippon Steel Corp Panneau de refroidissement par l'eau pour paroi de four et enveloppe de four a arc
DE102010018648A1 (de) * 2010-04-28 2011-11-03 Saint-Gobain Industriekeramik Düsseldorf Gmbh Korrosionsschutzkörper und Schutzsystem für eine Ofeninnenwand

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
LU88629A1 (fr) * 1994-07-18 1995-10-02 Centre Rech Metallurgique Garnissage de protection en briques rétractaires pour un caisson de refroidissement d'un four industriel

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