EP3235911B1 - Plaque de refroidissement pour un élément de refroidissement pour fours métallurgiques - Google Patents

Plaque de refroidissement pour un élément de refroidissement pour fours métallurgiques Download PDF

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Publication number
EP3235911B1
EP3235911B1 EP17163966.9A EP17163966A EP3235911B1 EP 3235911 B1 EP3235911 B1 EP 3235911B1 EP 17163966 A EP17163966 A EP 17163966A EP 3235911 B1 EP3235911 B1 EP 3235911B1
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EP
European Patent Office
Prior art keywords
cooling plate
wear protection
inserts
cooling
plate 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.)
Active
Application number
EP17163966.9A
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German (de)
English (en)
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EP3235911A1 (fr
Inventor
Christof Dratner
Frank Böert
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.)
KME Special Products GmbH and Co KG
Original Assignee
KME Germany GmbH
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Filing date
Publication date
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Publication of EP3235911A1 publication Critical patent/EP3235911A1/fr
Application granted granted Critical
Publication of EP3235911B1 publication Critical patent/EP3235911B1/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
    • 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 plate for 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 metal cooling plates are used to protect the wall of the furnace, for example a blast furnace, from overheating, from abrasive wear, from thermomechanical and from thermochemical attacks.
  • the installation of cooling elements on the inside of the furnace wall reduces or prevents such attacks.
  • staves which consist of metallic materials, preferably of steel, gray cast iron and copper.
  • combinations of punctual and area-covering cooling elements are known.
  • refractory protective means To protect the hot side of the cooling elements are partial or full-surface, refractory protective means known. They serve as start-up and during further operation as wear protection. They consist of refractory, unshaped or shaped ceramic materials in various thicknesses up to approx. 250 mm.
  • inserts are known, which are arranged in receptacles on the furnace interior facing the hot side of the cooling plate ( US 6,580,743 B1 ).
  • the shots are mostly grooves with an undercut.
  • these are dovetail-like grooves which accommodate both unshaped and shaped refractory materials, graphite, steel, cast steel or gray cast iron. It can also ceramic materials, such as silicon carbide ( US 4,437,651 A ) High performance ceramics are used ( EP 2 733 451 A1 ).
  • the dovetail grooves can also be protected by additional metal inserts inserted into the grooves ( WO 2009/147192 A1 ). All these measures aim to increase the service life of the cooling elements.
  • inserts of certain materials may constitute a thermal barrier that may hinder the desired freezing of a protective layer during start-up and during operation of the furnace.
  • the present invention seeks to provide a cooling plate for a cooling element, which has the ability to freeze and obtain protective layers and at the same time opens the possibility to improve the service life.
  • the metallic cooling plate according to the invention for a cooling element for metallurgical furnaces has in its interior extending coolant channels.
  • the cooling plate has at least one cavity for receiving a wear protection insert arranged in its interior with higher wear resistance than the surrounding metallic cooling plate.
  • the at least one cavity is located at a distance from the coolant channels.
  • the at least one insertable wear protection insert is not in an installed position on the surface of the cooling plate or is in contact with the surface of the cooling plate, but is located at a distance from a furnace interior facing a flat or surface-structured hot side of the cooling plate, as well as the inside, d. H. in the distance to the hot side extending coolant channels.
  • Coolant channels may be formed through holes in the metallic cooling plate or may be e.g.
  • Tubes, shrouds or boundaries of cooling channels, such as e.g. Stoppers are not wear protection inserts in the sense of the invention.
  • the wear protection elements according to the invention do not come into contact with the coolant channels and are not part of the wall of a coolant channel.
  • the wear protection inserts which are also referred to below as inserts, have no negative influence on the normal cooling function of the cooling element and in particular on the freezing of a protective layer.
  • the advantageous effect of this insert only comes into play when the superficial protective layer of the cooling plate itself has been removed and, in addition, if the cooling plate itself is subject to increased wear and material removal due to abrasive operation.
  • the inside, so arranged at a distance from the hot side or arrange inserts, can prevent the progression of wear of the cooling plate only when the material of the metallic cooling plate itself has been removed so far that the inserts themselves are exposed to increased wear. They exert their effect, because they have a higher wear resistance, unlike the metallic material that surrounds them.
  • the inserts are so long inside the cooling plate, as long as it is still intact so far that the material of the cooling plate covers the inserts.
  • the distance of the inserts from the hot side decreases progressively with increasing wear. The progression of wear is inhibited when the inserts are exposed to direct contact with the interior of the oven and become, as it were, part of the hot side.
  • the invention provides a cooling plate adapted to receive inserts.
  • the inserts may be pre-assembled in the cavities provided for this purpose or may later be inserted into the cavities by the customer as required.
  • the cavities are located between the hot side and the coolant channels, or between the hot side and a tube in the cooling plate, through which the coolant flows. In this intermediate area, the protection can be improved by subsequently inserted inserts. Since a change in the cooling plate by z. B. subsequently introduced by the customer cavities may lead to a loss of warranty of the manufacturer, the invention provides prefabricated cooling plates available, which are equipped according to the customer's request with appropriate cavities for the said inserts.
  • the inserts are preferably not insertable or mountable from the hot side into the interior of the cooling plate and therefore have no influence on the surface design of the hot side.
  • the hot side can be designed independently of the inserts and be provided with further, superficially arranged anti-wear agents.
  • the inserts, so the inner wear protection inserts are preferably not from the back of the cooling plate, d. H. from the cold side, can be used in the cooling plate, but from the narrower edge side.
  • the inserts are preferably placeable in holes in the cooling plate.
  • the holes preferably extend horizontally. This corresponds to the usual installation direction of outer wear protection inserts, which are mounted on the surface of the cooling plate. As a rule, these are outer wear protection inserts, which are held in mutually parallel grooves.
  • At least an insert in a central region of the cooling plate can be arranged.
  • the middle region extends over approximately 25 to approximately 75% of the horizontally measured width of the cooling plate.
  • this central region extends from an upper end of the hot side to a lower end of the hot side.
  • the width of the central region may vary from the upper end to the lower end.
  • edge regions can be free of inserts and free of cavities for receiving the inserts.
  • the width of the two adjacent edge regions results from the total width of the cooling plate measured in the horizontal direction minus the width of the middle region.
  • the cavities in two mutually parallel planes, which in turn are arranged parallel to the hot side of the cooling plate, run.
  • the heat dissipation through the cooling element can be optimized by providing several cavities with smaller inserts than single large cavities and inserts with a correspondingly large cross section.
  • the inserts are located spatially between the hot side and the coolant ducts that are farther away from the hot side.
  • the internal inserts have the advantage that they can not be damaged during factory pre-assembly during transport and during installation of the cooling elements and in particular against damage caused by Blows are protected. This is particularly advantageous when it comes to inserts made of brittle materials, especially ceramic materials.
  • the cooling plates according to the invention preferably have webs on their hot side, wherein a cavity for an inner wear protection insert is arranged in at least one of the webs.
  • the webs can be undercut so that z. B. dovetailed grooves for receiving the known in the art ceramic or metallic outer inserts can serve to protect the hot side. According to the invention, however, it does not depend on the design of the grooves, but on the fact that the webs are protected when the ceramic or metallic superficially arranged wear protection inserts are worn. It is not necessary that each bridge is providable over its entire length with an inner insert. For example, every second or third bridge may be wholly or partially provided with an insert.
  • the region of the webs is particularly protected, so that a part of the protective effect is transmitted from the hot-side, outer wear protection inserts on the internally mounted inserts.
  • the inserts according to the invention can be very easily placed within the cooling plate in terms of production engineering.
  • the production of cavities in the form of holes is relatively simple.
  • the insertion of preformed inserts is associated with very little installation effort.
  • the holes must also be made only in those areas where inserts are to be arranged.
  • the holes do not have to be completely continuous. It may be blind holes, in which the respective insert is used only from one edge side of the cooling plate forth if necessary. In particular, these holes extend only over the central region of the cooling plate.
  • the inserts themselves can be made of steel or ceramic materials.
  • an insert has a higher wear resistance. It may in particular be so-called high-performance ceramic materials such.
  • the insert is a rod with a circular cross-section, as it optimally fills holes produced by drilling. In the context of the invention, however, the insert may also be a hollow profile.
  • Inserts made of hybrid materials combining several materials are also possible, as are various inserts in one and the same bore, with different inserts being used over the length of the bore depending on the expected wear.
  • inserts of steel in a first length portion of the bore may be combined with another insert of ceramic in another length portion of the bore.
  • An insert does not necessarily correspond in its outer cross section, but preferably, the cross section of the bore.
  • the insert may have any cross-section, for example, be a cross-sectionally cross-shaped rod, the z. B. is additionally pressed in a refractory potting compound, the z. B. was introduced in advance in the bore, so that the wear protection insert is firmly and positively anchored in the bore.
  • an insert may also be a potting compound, which is introduced into a bore in the cooling plate and cures only in situ.
  • the metallic cooling plate itself consists in particular of copper or a copper material.
  • Other metallic materials such as steel or gray cast iron can also be considered for the cooling plates. It can be rolled or cast cold plates.
  • the cooling plate according to the invention makes it possible to achieve a long service life and reliability of a metallurgical furnace, even if a on the hot side superficially and in contact with the oven interior wear protection layer is worn and the metallic material of the cooling plate itself already is exposed to direct wear.
  • the invention further relates to a cooling element with the above-described cooling plate and the pre-assembled in the cavities wear protection inserts.
  • the cooling elements according to the invention can be used in particular in blast furnaces in which there is still no abrasive wear.
  • Conventional cooling elements can be retrofitted with the inner inserts according to the invention, so that additional security is created for the operator of the blast furnace.
  • FIGS. 1 and 2 show once in a front view and once in a side view of an inventive cooling element 1 for a metallurgical furnace.
  • the cooling element 1 is mounted obliquely in the installed position ( FIG. 2 ). It may be a cooling element which is mounted in the lower region of a blast furnace, ie in the so-called detent.
  • the inclination angle of the cooling element 1 is irrelevant with respect to the invention.
  • the cooling element 1 can also be mounted inclined perpendicular to the illustrated variant or opposite.
  • the cooling element 1 comprises as essential component a cooling plate 2, which is configured substantially rectangular. It can taper slightly towards the lower end in this installation position.
  • the cooling plate 2 consists of a metallic material, in particular of copper or of a copper material.
  • the cooling plate 2 has a hot side 3, which faces a furnace interior, not shown, of a metallurgical furnace.
  • the so-called cold side 4 is opposite to the hot side 3.
  • the cold side 4 is oriented towards the wall of a furnace, not shown.
  • coolant connections 7, 8 which is a non-illustrated wall of the furnace push through.
  • a fastening element 9 in the form of a fastening bolt. About this fastener 9, the cooling element 1 can be attached to the wall of the furnace.
  • the cooling plate 1 is traversed in a manner not shown by coolant channels that connect the upper coolant port 7 fluidly connected to the lower coolant port 8 and for the passage of the coolant, preferably cooling water used.
  • coolant channels preferably cooling water used.
  • the coolant channels are inside, d. H. without contact to the hot side 3 or cold side 4 wear protection inserts 12, 13, 14 inside the cooling plate 2.
  • wear protection inserts 12-14 should not be visible on the edge sides 18, 19 of the cooling plate 1, but that they are not located on the surface of the hot side 3.
  • the wear protection inserts 12-14 are complete, d. H. Surrounded on all sides by the material of the cooling plate 2 and possibly a closure of a bore.
  • the wear protection inserts 12 - 14 are identically configured. They are only at different distances from the hot side 3 of the cooling plate 2, wherein for the invention as a reference for the hot side 3, the end face 16 of the webs 10 is assumed. However, the hot side 3 is the entire surface of the cooling plate 2, which faces the interior of the furnace, ie including the flanks of the webs 10 and including the groove bottom 15 of the receptacles 11.
  • All wear protection inserts 12, 13, 14 are located in the region of the webs 10th
  • the wear protection insert 12 is located, for example, in the region of the base of the web 10 approximately at the level of the groove base 15 of the receptacle 11 immediately adjacent web 10 is the wear protection insert 13 approximately at mid-height between the groove bottom 15 and the end face 16 of the web 10.
  • the turn adjacent wear protection insert 14 is adjacent to the end face 16 of the web 10 and even closer to the hot side 3. Bei the further adjacent wear protection inserts 12-14, the distances vary, so that from the upper end 5 to the lower end 6, an alternating or undulating course with respect to the arrangement of the wear protection inserts 12 - 14 results.
  • the wear protection inserts 12 - 14 themselves are arranged in cavities 17 in the form of bores in the cooling plate 2.
  • the cavities 17 extend parallel to the hot side 3 and also in the horizontal direction. Specifically, the cavities 17 follow the course of the webs 10.
  • the cavities 17 can extend over the entire horizontal width B (FIG. FIG. 2 ) of the cooling element 1 extend. Additionally or alternatively, cavities can be arranged in a plane E, which extend parallel to the hot side 3 and viewed from the hot side 3 forth below the receptacles 11, but are upstream of the coolant channels not shown.
  • FIG. 1 is a central region M of the cooling plate 2, which extends over approximately 50% of the width B of the cooling element 1 and in the vertical direction from the lower end 6 to the upper end 5.
  • the wear protection inserts are arranged at least in this central region M.
  • the regions adjacent to the middle region M are referred to as edge regions R and each extend as far as the outer edge sides 18, 19 of the cooling plates 2.
  • wear protection inserts may additionally be arranged. If wear protection inserts are to be arranged only in a partial region, in particular in the middle region M of the cooling element 1, it is sufficient to introduce corresponding cavities 17 in the form of bores from an edge side 18, 19 into the cooling plate 2.
  • the cavities 17 are then blind holes which extend, for example, only over one of the two edge regions R and the middle region M in order to receive suitable wear protection inserts.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Claims (16)

  1. Plaque de refroidissement métallique pour un élément de refroidissement pour des fours métallurgiques, avec des canaux de moyen de refroidissement s'étendant en son intérieur, caractérisée en ce que la plaque de refroidissement (2) métallique présente au moins un espace creux (17) pour la réception d'un insert de protection contre l'usure (12, 13, 14) intérieur pouvant être placé dans l'intérieur de la plaque de refroidissement (2) métallique, qui présente à la différence du matériau de la plaque de refroidissement (2) métallique une résistance à l'usure supérieure.
  2. Plaque de refroidissement selon la revendication 1, caractérisée en ce que l'au moins un insert de protection contre l'usure (12, 13, 14) intérieur peut être placé dans un espace creux (17) configuré en tant que perçage dans la plaque de refroidissement (2).
  3. Plaque de refroidissement selon la revendication 2, caractérisée en ce que l'espace creux (17) configuré en tant que perçage s'étend horizontalement dans une position d'installation de la plaque de refroidissement (2).
  4. Plaque de refroidissement selon l'une quelconque des revendications 1 à 3, caractérisée en ce qu'au moins un insert de protection contre l'usure (12, 13, 14) intérieur peut être placé dans une zone médiane (M) de la plaque de refroidissement (2).
  5. Plaque de refroidissement selon la revendication 4, caractérisée en ce que la zone médiane (M) s'étend d'une extrémité supérieure (5) d'un côté chaud (3) à une extrémité inférieure (6) du côté chaud (3), dans laquelle plusieurs inserts de protection contre l'usure (12, 13, 14) intérieurs peuvent être placés dans cette zone médiane (M).
  6. Plaque de refroidissement selon la revendication 4 ou 5, caractérisée en ce que des zones de bord (R) contigües à la zone médiane (M) sont exemptes d'inserts de protection contre l'usure (12, 13, 14).
  7. Plaque de refroidissement selon l'une quelconque des revendications 1 à 6, caractérisée en ce que plusieurs inserts de protection contre l'usure (12, 13, 14) intérieurs sont prévus et peuvent être agencés à des distances divergentes d'un côté chaud (3) de la plaque de refroidissement (2).
  8. Plaque de refroidissement selon la revendication 7, des inserts de protection d'usure (12, 13 14) peuvent être agencés dans plusieurs plans s'étendant parallèlement les uns aux autres à distance du côté chaud (3).
  9. Plaque de refroidissement selon l'une quelconque des revendications 1 à 8, caractérisée en ce qu'au moins un insert de protection contre l'usure (12, 13, 14) intérieur peut être agencé dans au moins une des nervures (10).
  10. Plaque de refroidissement selon la revendication 9, caractérisée en ce que la plaque de refroidissement (2) présente des nervures (10) avec des inserts de protection contre l'usure (12, 13, 14) pouvant être agencés en son intérieur et d'autres nervures ou sections d'autres nervures sans inserts de protection contre l'usure (12, 13, 14) pouvant être agencés en son intérieur.
  11. Plaque de refroidissement selon l'une quelconque des revendications 1 à 10, caractérisée en ce qu'au moins un insert de protection contre l'usure (12, 13, 14) en acier peut être placé à l'intérieur de la plaque de refroidissement (2).
  12. Plaque de refroidissement selon l'une quelconque des revendications 1 à 10, caractérisée en ce qu'au moins un insert de protection contre l'usure (12, 13, 14) qui se compose d'un matériau céramique, peut être placé à l'intérieur de la plaque de refroidissement (2).
  13. Plaque de refroidissement selon l'une quelconque des revendications 1 à 12, caractérisée en ce que l'au moins un insert de protection contre l'usure (12, 13, 14) intérieur insérable est une barre avec une section transversale ronde et circulaire.
  14. Plaque de refroidissement selon l'une quelconque des revendications 1 à 13, caractérisée en ce que l'au moins un insert de protection contre l'usure (12, 13, 14) intérieur insérable est un profilé creux.
  15. Plaque de refroidissement selon l'une quelconque des revendications 1 à 14, caractérisée en ce que des espaces creux (17) sont réalisés seulement dans les zones dans lesquelles des inserts de protection contre l'usure (12, 13, 14) sont prévus.
  16. Elément de refroidissement (1) avec une plaque de refroidissement (2) et avec au moins un insert de protection contre l'usure (12, 13, 14) intérieur agencé à l'intérieur de la plaque de refroidissement (2) selon l'une quelconque des revendications 1 à 15.
EP17163966.9A 2016-04-20 2017-03-30 Plaque de refroidissement pour un élément de refroidissement pour fours métallurgiques Active EP3235911B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016107284.2A DE102016107284A1 (de) 2016-04-20 2016-04-20 Kühlplatte für ein Kühlelement für metallurgische Öfen

Publications (2)

Publication Number Publication Date
EP3235911A1 EP3235911A1 (fr) 2017-10-25
EP3235911B1 true EP3235911B1 (fr) 2018-11-28

Family

ID=58464325

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17163966.9A Active EP3235911B1 (fr) 2016-04-20 2017-03-30 Plaque de refroidissement pour un élément de refroidissement pour fours métallurgiques

Country Status (3)

Country Link
EP (1) EP3235911B1 (fr)
DE (1) DE102016107284A1 (fr)
ES (1) ES2709192T3 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2935394A1 (de) * 1979-09-01 1981-03-26 Klöckner-Humboldt-Deutz AG, 51063 Köln Ofenanlage, insbesondere zum schmelzen von erzkonzentrat
FR2493871A1 (fr) * 1980-11-07 1982-05-14 Usinor Plaques de refroidissement pour hauts fourneaux
JP2000248305A (ja) * 1999-02-26 2000-09-12 Nippon Steel Corp ステーブクーラー
LU91454B1 (en) 2008-06-06 2009-12-07 Wurth Paul Sa Cooling plate for a metallurgical furnace
EP2733451B1 (fr) 2012-11-15 2017-02-01 KME Germany GmbH & Co. KG Élément de refroidissement pour fours métallurgiques

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3235911A1 (fr) 2017-10-25
ES2709192T3 (es) 2019-04-15
DE102016107284A1 (de) 2017-10-26

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