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EP0029416A1 - Elément de refroidissement pour un four à arc - Google Patents

Elément de refroidissement pour un four à arc Download PDF

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Publication number
EP0029416A1
EP0029416A1 EP80830091A EP80830091A EP0029416A1 EP 0029416 A1 EP0029416 A1 EP 0029416A1 EP 80830091 A EP80830091 A EP 80830091A EP 80830091 A EP80830091 A EP 80830091A EP 0029416 A1 EP0029416 A1 EP 0029416A1
Authority
EP
European Patent Office
Prior art keywords
electric arc
panel
fact
arc furnaces
cooling panel
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
EP80830091A
Other languages
German (de)
English (en)
Other versions
EP0029416B1 (fr
Inventor
Andrea Pittini
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.)
Impianti Industriali SpA
Original Assignee
Impianti Industriali SpA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11322532&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0029416(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Impianti Industriali SpA filed Critical Impianti Industriali SpA
Priority to AT80830091T priority Critical patent/ATE11178T1/de
Publication of EP0029416A1 publication Critical patent/EP0029416A1/fr
Application granted granted Critical
Publication of EP0029416B1 publication Critical patent/EP0029416B1/fr
Expired legal-status Critical Current

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Classifications

    • 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; Electric arc furnaces ; Tank furnaces
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces
    • F27B3/24—Cooling arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/12—Elements constructed in the shape of a hollow panel, e.g. with channels

Definitions

  • the subject of this invention is a cooling panel for electric arc furnaces; to be more exact, the subject of this invention is a cooling panel of the type employed to cool . the upper band of the wall of the electric arc furnace or to cool the cover of said furnace.
  • Some rings are formed with box-wise elements within which the cooling water circulates.
  • the down-. gate described in patent CH 221354 according to which said down-gate has its sides and beam part made of a box-wise metal structure, and the water circulates within them.
  • the integral ring envisaged in DE AS 2631982 to cool the upper band of the wall of the furnace also has a box-wise structure, and according to that patent said element has a refractory lining arranged for its inner surface.
  • French patent No. 1514515 has, instead, two integral box-wise rings, located one above the other, to cool the upper band of the furnace wall and a like structure to cool. the furnace cover.
  • the box-wise elements are. connected to the refractory walls with some anchorage means. and have in their hollow insides some pipes in which the cooling water circulates.
  • Patent DE AS 2659827 has two box-wise cooling rings, both alike, arranged one above the other.
  • said. rings are made in segments connected together and have some. protrusions extending into the refractory lining to increase the heat-carrying capacity.
  • Patent US 3829595 envisages the use of two rings situated one above the other and made in segments with solid metal blocks connected together; some vertical pipes . are visualised within these blocks for the passage of cooling water. Said blocks have a refractory lining and refractory . bricks on their inner surface.
  • German utility model GM 7616608 envisages, instead, a furnace in which are foreseen three cooling zones disposed symmetrically around the upper band of the furnace wall; each zone comprises a plurality of metal cooling blocks provided with internal pipes in coils for the passage of cooling water; the inner surface of the blocks is equipped with metal protrusions, whilst the.outer surface is covered with a metal plate that encloses said cooling pipes.
  • Patents US 3743752, US 3777043 and GB 1193527 also foresee the installation of box-wise cooling elements to be applied at points where the temperature is very high.
  • said coiled channel is not enclosed in . nor fused to the refractory material nor to the cast iron or copper block as in US 3843106, but is envisaged as being. .on the outside of the furnace and of its cover, as in patent FR 873.478, or else said coiled channel is also wound around .the electrodes at the inlet for said electrodes as in patent FR 1238713.
  • Another lay-out is visualised in patent FR 1155723, which foresees an electric arc furnace consisting of two coaxial jackets located one inside the other and separated from .each other by a space; the inner jacket is cooled with gas flowing through said space, whereas the outer jacket is cooled with water coming in at the bottom and going out at the top.
  • the annular cavity of the outer jacket has some vertical channels extending throughout practically all the length of. the furnace, and these channels consist of a corrugated metal-foil element fixed between the internal walls of said. circular cavity.
  • This invention tends to overcome this problem by the provision of a new cooling panel intended for the construction of the cooling ring or furnace cover.
  • the invention combines easy manufacture with a safe structure able to absorb. any thermal or mechanical shock, and also offers an extremely .simple structure to be constructed.
  • a panel of thick plate is .cut according to whatever preferential shape is wished. Ac-. cording to the circumstances involved, the panel is bent beforehand or after the successive operations.
  • a plurality . of internal channels is made with a tool, and they are con-. nected together with manifolds.
  • the panels are sharp ed according to the circumstances in question so as to as. sume a partially cylindrical conformation or a partially truncated-cone conformation before or after the machining has been carried out, or else before or after the closure of the inlets of the connecting pipes.
  • the manifolds or transit channels may be made at the ends or in an inter-.
  • the mediate position by machining the exposed outer surface with tool and then closing it thereafter with strip or with .sheet sealed to the panel by welding.
  • the inlet and outlet attachments are arranged in any desired suitable position on the outer surface of the panel so as to correspond .with the manifolds.
  • the path of the circulating, .water can be highly varied within the limits allowed by the making of the channels with a tool, whether it be done by drilling (for instance, with a straight-flute drill) or by . milling or with a shaping or milling machine for plate, for. example.
  • One purpose of this invention is to envisage a cooling. .panel which can be machined from plate of a suitable thick-. ness available commercially; said plate must be capable of being worked readily with a tool so as to hold inside itself .the cooling channels in a quantity enough for the purpose.
  • Another purpose of this invention is to visualise a .cooling panel with internal channels for the cooling water . .formed as desired, which can be increased in number and volume, in the zones of higher temperature.
  • Yet another purpose is to envisage a cooling panel which has a low cost and can be readily and economically replaced. .or adjusted if found faulty.
  • a purpose is to obtain a cooling panel from thick plate with one or more conduits or manifolds made, perhaps at least partly, in its exposed sur - face and then closed superficially.
  • the panel of this invention does not require auxiliary lining pipes, thus enabling a .. large reduction to be made in both costs and and weight. It. is also an advantageous fact that the cooling channels can be located very near the surface, unlike panels made by casting, which need greater minimum thicknesses. This also enables a greater power of cooling and heat dispersion to be obtained. Another advantageous fact is that the panel forms. a more uniform and efficient block to absorb heat.
  • Yet another advantage is the ability offered by this invention to envisage a watertight cooling panel made of resilient and homogeneous material with no risks of leakage in the cooling water circuit, while it is also an advantage to be able. to instal adequate supports for the refractory material.
  • the invention is therefore realized with a cooling panel to. be used with arc furnaces either to obtain the ring lying above the bath or to obtain the furnace cover;
  • the inner side of the panel may comprise some supports and anchorage. means for the refractory material, while the outer side may. have attachments for the delivery and discharge of the cooling fluid;
  • the panel is characterized by the fact that it is made of any desired thick plate and cut to a desired prefer- .ential profile, a coordinated plurality of channels substantially contained within the thickness of said plate being made by processing with a tool, and the plate being shaped . as wished and consisting of any desired but advantageously . metallic material.
  • 20 is generically a panel for the side of the furnace, while 120 is a panel for .the top thereof; the side panel is shaped advantageously as .a segment of the' circumference, whereas the top panel fits a section of the furnace cover; the top panel-may comprise . some holes (for the entry of the electrodes, the outlet for. fumes, the introduction of inoculants, etc.), which may be positioned in the middle of the panel (as per the examples . of Figs.
  • the side panel may include holes for controls and access to suit the usages and requirements; 21 and 22 are respectively the upper and lower sides; said sidea, as also the la teral sides 27, may include special profiles or shapings so. as to facilitate connections, installation, airtight seal, etc.; 23 is the inner face and may comprise some suitable .
  • means 28 of any desired shape and type which can improve and facilitate the installation of the refractory material; 24. is the outer face, from which there protrude advantageously the connecting pipes or attachments 25 and 26 for connection to the delivery or discharge of cooling liquid; 25 and 26 .
  • inlet and outlet attachments or viceversa, which serve respectively to feed and discharge the cooling liquid .
  • employed; 28 are the anchorages or anchorage means which serve to facilitate the installation and retaining of the refractory material; said anchorage means can be welded, .screwed or inserted into appropriate holes and clamped there, .for instance, with nuts on the face 24; 29 - 129 - 229 are.
  • .channels acting as an upper manifold are channels acting as a lower manifold (the definition of upper .and lower manifold here being merely illustrative); 31 and I3I are possible tracts to connect one or both of the attachments to the channels 29 and 30 acting as manifolds; 32 are .the conduits which convey the cooling liquid coding from the manifolds; 33 are plugs which are fixed to give a watertight .seal at the ends, in the sides and, possibly, in the faces by blocking the channels 29, 30 and 32; the plugs 33 can be.
  • 34 are the inside plugs which are inserted, for instance, into the manifolds to di-. vide them into sections and to modify the circulation of liquid as wished; 35 is the cover of the channel made in the exposed surface and then closed; said cover may be wholly or partially embedded or be fixed on the outside; 36 is a possible hole in the panels; it serves for very varied uses and may have very varied shapes and sections; it can lie in any. desired position in the panel and thus may be situated in- . differently in the middle, in an intermediate position or near the edge or may be formed in the edge so as to corres-.
  • FIG. 9a, gb and 9c is the closure for the channel 37 and is such as to permit the cooling liquid to circulate around the hole 36 but not to run out; 39 is the shaft of the electric furnace; 40 are the electrodes; 41 are examples of delivery means while 42 are examples of discharge means, but both of them could be inverted; said outer manifolds 41. and 42 are shown connected in a ring but in actual fact can. be connected as wished.
  • the method of working is evident.
  • the liquid enters through 25 or 26 and, after having passed through the manifolds 29 and 30, the conduit 32 and the possible tracts 31 .and I3I, leaves through 26 or 25.
  • Said channels can be made wholly or partially with a drill and bit (for instance, with a so-called straight-flute drill for long bores), or with a milling cutter or a rotating tool (for instance, for the channels 37 of Figs. 9a and 9b), or again with a shaping machine (or milling machine) for plate.
  • a drill and bit for instance, with a so-called straight-flute drill for long bores
  • a milling cutter or a rotating tool for instance, for the channels 37 of Figs. 9a and 9b
  • a shaping machine or milling machine
  • the plugs 33 or closures 35 - 38 are then fixed with any desired means such as welding, screwing, pressure, etc.
  • Fig.5 shows the case of a panel wherein a head channel is obtained by milling (shown as an example of. a non-through channel), while the other channel 129 serves to connect the various conduits 32 and, perhaps, 31 without said conduits being thereafter plugged as per the examples of Fig. 4 and other solutions.
  • the conduits 32 can obviously be vertical or horizontal or follow any desired slope.
  • Fig. 7 shows an example wherein the manifold 30 was made from the beginning as a non-through channel, and the conduits 32 are also not through channels. Moreover, Fig. 7 shows a conduit 32 made, for instance, by milling.
  • the conduits 32 can lie in any direction in the panel 120.
  • Figs. 9 show some possible types of collars both for the cooling of the edge of the electrode and for connecting the third or fourth hole.
  • the proportions and/or sizes can be changed, and other types of courses can be realized; it is possible to make channels wholly by drilling, or partly by drilling and partly by working on the exposed surface and then closing the channel, or all the channels can be made in the open exposed surface and then closed; it is possible to make the manifolds 29 - 30 horizontal, almost horizontal, vertical or almost vertical or, in general, in any desired direction; it is possible to make the conduits 32 meet the manifolds 29 - 30 at any desired angle; the whole course can consist of one single conduit, and so on. These and other variants are all. possible for a technician in this field.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
EP80830091A 1979-11-14 1980-10-31 Elément de refroidissement pour un four à arc Expired EP0029416B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80830091T ATE11178T1 (de) 1979-11-14 1980-10-31 Kuehlelement fuer lichtbogenschmelzoefen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8349079 1979-11-14
IT83490/79A IT1126161B (it) 1979-11-14 1979-11-14 Piastra di raffreddamento per forni elettrici ad arco

Publications (2)

Publication Number Publication Date
EP0029416A1 true EP0029416A1 (fr) 1981-05-27
EP0029416B1 EP0029416B1 (fr) 1985-01-09

Family

ID=11322532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80830091A Expired EP0029416B1 (fr) 1979-11-14 1980-10-31 Elément de refroidissement pour un four à arc

Country Status (10)

Country Link
EP (1) EP0029416B1 (fr)
JP (1) JPS5682376A (fr)
AR (1) AR223249A1 (fr)
AT (1) ATE11178T1 (fr)
BR (1) BR8007415A (fr)
DD (1) DD154310A1 (fr)
DE (1) DE3069951D1 (fr)
ES (1) ES8201728A1 (fr)
IT (1) IT1126161B (fr)
YU (1) YU291080A (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2489491A1 (fr) * 1980-09-02 1982-03-05 Freiberg Brennstoffinst Bouclier de protection thermique pour fonds et couvercles de recipients
EP0085462A1 (fr) * 1982-01-29 1983-08-10 BBC Aktiengesellschaft Brown, Boveri & Cie. Voûtes d'un four à arc refroidies par une circulation de fluide
FR2528554A1 (fr) * 1982-06-10 1983-12-16 Skf Steel Eng Ab Panneau de refroidissement pour fours electriques a arc et procede de fabrication dudit panneau de refroidissement
DE3603783A1 (de) * 1985-02-07 1986-08-07 Elkem As Seitenwand fuer einen metallurgischen schmelzofen
GB2176883A (en) * 1984-04-19 1987-01-07 Hylsa Sa Cooling panel for furnace
DE3936467A1 (de) * 1989-11-02 1991-05-08 Eisenmann Kg Maschbau Industrieofen
EP0705906A1 (fr) * 1994-10-07 1996-04-10 MAN Gutehoffnungshütte Aktiengesellschaft Plaque de refroidissement pour fours à cuve
EP0930371A1 (fr) * 1998-01-16 1999-07-21 Sms Schloemann-Siemag Aktiengesellschaft Plaque de refroidissement pour fours à cuve
FR2775695A1 (fr) * 1998-03-05 1999-09-10 Forcast Int Plaque de refroidissement pour un four a cuve muni d'un revetement refractaire, et notamment pour haut fourneau
WO2003089863A1 (fr) * 2002-04-19 2003-10-30 Outokumpu Oyj Procede de fabrication d'un element de refroidissement et element de refroidissement
FR2891981A1 (fr) * 2005-10-10 2007-04-13 Fai Production Soc Par Actions Plaque de contact pour electrode de four d'electrometallurgie et procede pour la fabrication d'une telle plaque
RU2544244C2 (ru) * 2009-11-30 2015-03-20 Тай-Хер ЯНГ Резервный источник питания с электродными пластинами, скрепляемыми с вспомогательными проводниками
US20160161185A1 (en) * 2014-12-09 2016-06-09 Berry Metal Company Furnace stave
ITUB20153270A1 (it) * 2015-08-27 2017-02-27 Gian Luca Masnata Voltino con raffreddamento perfezionato per forni fusori elettrici.
WO2018013271A1 (fr) * 2016-07-13 2018-01-18 Applied Materials, Inc. Support de substrat amélioré

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58188593U (ja) * 1982-06-10 1983-12-14 ニチデン機械株式会社 赤外線集中加熱装置
JPS60140091A (ja) * 1983-12-27 1985-07-24 日本鉱業株式会社 炉体冷却用ジヤケツト
JPS60164189A (ja) * 1984-02-07 1985-08-27 日本鉱業株式会社 炉体の冷却装置
JPS6297496U (fr) * 1985-12-09 1987-06-22
DE19545984B4 (de) * 1995-12-09 2005-02-10 Sms Demag Ag Kühlplatte für Schmelzöfen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2396976A (en) * 1944-01-18 1946-03-19 Carnegie Illinois Steel Corp Blast furnace
US3339904A (en) * 1964-09-17 1967-09-05 Koppers Co Inc Support structure for a water-cooled cupola furnace
US3940552A (en) * 1974-01-23 1976-02-24 Daido Seiko Kabushiki Kaisha Water-cooled panel for arc furnace
FR2411380A1 (fr) * 1977-12-06 1979-07-06 Sanyo Special Steel Co Ltd Panneau a refroidissement d'eau utilise dans un four electrique
DE2907511A1 (de) * 1979-02-26 1980-09-11 Gutehoffnungshuette Sterkrade Kuehlplatte fuer schachtoefen und verfahren zur herstellung derselben

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2396976A (en) * 1944-01-18 1946-03-19 Carnegie Illinois Steel Corp Blast furnace
US3339904A (en) * 1964-09-17 1967-09-05 Koppers Co Inc Support structure for a water-cooled cupola furnace
US3940552A (en) * 1974-01-23 1976-02-24 Daido Seiko Kabushiki Kaisha Water-cooled panel for arc furnace
FR2411380A1 (fr) * 1977-12-06 1979-07-06 Sanyo Special Steel Co Ltd Panneau a refroidissement d'eau utilise dans un four electrique
DE2907511A1 (de) * 1979-02-26 1980-09-11 Gutehoffnungshuette Sterkrade Kuehlplatte fuer schachtoefen und verfahren zur herstellung derselben

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2489491A1 (fr) * 1980-09-02 1982-03-05 Freiberg Brennstoffinst Bouclier de protection thermique pour fonds et couvercles de recipients
EP0085462A1 (fr) * 1982-01-29 1983-08-10 BBC Aktiengesellschaft Brown, Boveri & Cie. Voûtes d'un four à arc refroidies par une circulation de fluide
FR2528554A1 (fr) * 1982-06-10 1983-12-16 Skf Steel Eng Ab Panneau de refroidissement pour fours electriques a arc et procede de fabrication dudit panneau de refroidissement
GB2176883A (en) * 1984-04-19 1987-01-07 Hylsa Sa Cooling panel for furnace
DE3603783A1 (de) * 1985-02-07 1986-08-07 Elkem As Seitenwand fuer einen metallurgischen schmelzofen
DE3936467A1 (de) * 1989-11-02 1991-05-08 Eisenmann Kg Maschbau Industrieofen
EP0705906A1 (fr) * 1994-10-07 1996-04-10 MAN Gutehoffnungshütte Aktiengesellschaft Plaque de refroidissement pour fours à cuve
EP0930371A1 (fr) * 1998-01-16 1999-07-21 Sms Schloemann-Siemag Aktiengesellschaft Plaque de refroidissement pour fours à cuve
FR2775695A1 (fr) * 1998-03-05 1999-09-10 Forcast Int Plaque de refroidissement pour un four a cuve muni d'un revetement refractaire, et notamment pour haut fourneau
WO2003089863A1 (fr) * 2002-04-19 2003-10-30 Outokumpu Oyj Procede de fabrication d'un element de refroidissement et element de refroidissement
FR2891981A1 (fr) * 2005-10-10 2007-04-13 Fai Production Soc Par Actions Plaque de contact pour electrode de four d'electrometallurgie et procede pour la fabrication d'une telle plaque
CN1949942B (zh) * 2005-10-10 2011-07-20 Fai生产公司 电冶金炉电极的接触板及制造该板的方法
NO343580B1 (no) * 2005-10-10 2019-04-08 Fai Production Kontaktplate for elektrometallurgisk smelteovnelektrode og fremgangsmåte for å produsere denne.
RU2544244C2 (ru) * 2009-11-30 2015-03-20 Тай-Хер ЯНГ Резервный источник питания с электродными пластинами, скрепляемыми с вспомогательными проводниками
US20160161185A1 (en) * 2014-12-09 2016-06-09 Berry Metal Company Furnace stave
US10168100B2 (en) * 2014-12-09 2019-01-01 Berry Metal Company Furnace stave
ITUB20153270A1 (it) * 2015-08-27 2017-02-27 Gian Luca Masnata Voltino con raffreddamento perfezionato per forni fusori elettrici.
EP3139120A1 (fr) * 2015-08-27 2017-03-08 Gian Luca Masnata Toit delta à refroidissement amélioré pour des fours électriques de fusion
WO2018013271A1 (fr) * 2016-07-13 2018-01-18 Applied Materials, Inc. Support de substrat amélioré

Also Published As

Publication number Publication date
IT7983490A0 (it) 1979-11-14
ES496535A0 (es) 1981-12-16
YU291080A (en) 1983-06-30
DE3069951D1 (en) 1985-02-21
ES8201728A1 (es) 1981-12-16
EP0029416B1 (fr) 1985-01-09
ATE11178T1 (de) 1985-01-15
AR223249A1 (es) 1981-07-31
JPS5682376A (en) 1981-07-06
IT1126161B (it) 1986-05-14
DD154310A1 (de) 1982-03-10
BR8007415A (pt) 1981-05-26

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