EP0029416B1 - Kühlelement für Lichtbogenschmelzöfen - Google Patents

Kühlelement für Lichtbogenschmelzöfen Download PDF

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Publication number
EP0029416B1
EP0029416B1 EP80830091A EP80830091A EP0029416B1 EP 0029416 B1 EP0029416 B1 EP 0029416B1 EP 80830091 A EP80830091 A EP 80830091A EP 80830091 A EP80830091 A EP 80830091A EP 0029416 B1 EP0029416 B1 EP 0029416B1
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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.)
Expired
Application number
EP80830091A
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English (en)
French (fr)
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EP0029416A1 (de
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
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Impianti Industriali SpA
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Publication date
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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(B1) "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/de
Application granted granted Critical
Publication of EP0029416B1 publication Critical patent/EP0029416B1/de
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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; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to 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.
  • said down-gate described in CH-A-221.354, 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 wiring envisaged in DE-A-2.631.982 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.
  • FR­A­-1.514.515 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.
  • DE-A-2.659.827 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.
  • US-A-3.829.595 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.
  • DE-U-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.
  • US-A-3.743.752, US-A-3.777.043 and GB-A-1.193.527 also foresee the installation of box-wise cooling elements to be applied at points where the temperature is very high.
  • rings consist of segmented cooling elements in which a cast iron or copper. block encloses a channel in coils wherein the water circulates, as in US-A-3.843.106, the whole being obtained by casting and the coiled channel protruding partially to correspond with the connecting curves.
  • said coiled channel is not enclosed in nor fused to the refractory material nor to the cast iron or copper block as in US-A-3.843.106, but is envisaged as being on the outside of the furnace and of its cover, as in FR-A-873.478, or else said coiled channel is also wound around the electrodes at the inlet for said electrodes as in FR-A-1.238.713.
  • Another layout is visualised in FR-A-1.155.723, 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 water 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.
  • the panel is bent beforehand or after the successive operations.
  • a plurality of internal channels is made with a tool, and they are connected together with manifolds.
  • the panels are shaped according to the circumstances in question so as to assume 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 intermediate position by machining the exposed outer surface with a 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 thickness 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 surface 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 weight.
  • 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 for electric arc furnaces, either to form the ring situated higher than the bath or to form the furnace cover, whereby the inner side comprises supports and anchorage means for the refractory material and the outer side inlet and outlet attachments for the cooling liquid, said panel being characterized by the fact that it is made of a plate which has a thickness able to incorporate channels and is cut to a preferential profile, whereby a coordinated plurality of channels substantially contained within the thickness of said plate is obtained by processing with a tool and whereby the plate is shaped according to a preferred profile.
  • 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 131, leaves through 26 or 25.
  • the plugs 33 or closures 35, 135, 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.
  • 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.
  • Fig. 9 show a possible type of collar 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.

Claims (10)

1. Kühlblech für elektrische Lichtbogenöfen, sowohl zur Bildung des Ringes über dem Bad als auch zur Bildung des Feuerraumgewölbes, wobei der innere Teil Stützen und Verankerungsmittel für das feuersichere Material und der äußere Teil Eingangs- und Ausgangsanschlußstutzen für die Kühlflüssigkeit enthalten können, wobei das genannte Kühlblech dadurch gekennzeichnet ist, daß es aus einem Blech mit einer zum Einbau von Kanälen geeigneten Stärke besteht und nach einem Vorzugsprofil (21-22-27) ausgeschnitten ist, wobei mittels Bearbeitung durch Werkzeug eine koordinierte Mehrheit Kanäle (29-30-32-37) erzielt wird, die wesentlich in der Stärke des genannten Bleches enthalten sind, wobei das Blech nach einem Vorzugsprofil geformt ist. -
2. Kühlblech für elektrische Lichtbogenöfen nach Anspruch 1, dadurch gekennzeichnet, daß die Kanäle (29-30-32-37) nach Belieben orientiert und verbunden sind, wobei mindestens ein Teil der Leitungen am Ende gepfropft ist (33), so daß sie einen geschlossenen Stromkreis bilden.
3. Kühlblech für elektrische Lichtbogenöfen nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Propfen (33) geschweißt sind.
4. Kühlblech für elektrische Lichtbogenöfen nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Pfropfen (33) geschraubt sind.
5.-Kühlblech für elektrische Lichtbogenöfen nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Pfropfen eingepresst sind.
6. Kühlblech für elektrische Lichtbogenöfen nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Sammelrohre (29-30-37) mindestens mit einer Leitung (32) verbunden sind.
7. Kühlblech für elektrische Lichtbogenöfen nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß mindestens ein Teil del Sammelrohre (29-30-37) aus der offenen ausgestellten Oberfläche erhalten werden und luftdichte Abschlußelemente (35-38) aufweisen.
8. Kühlblech für elektrische Lichtbogenöfen nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß mindestens ein Teil der Leitungen (32) aus der offenen ausgestellten Oberfläche erhalten werden und luftdichte Abschlußelemente (35-38) aufweisen.
9. Kühlblech für elektrische Lichtbogenöfen nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß im Kühlblech (20-120) mindestens ein Verbindungsteil (31-131) vorhanden ist.
10. Kühlblech für elektrische Lichtbogenöfen nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Blech aus Metallmaterial besteht.
EP80830091A 1979-11-14 1980-10-31 Kühlelement für Lichtbogenschmelzöfen Expired EP0029416B1 (de)

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 EP0029416A1 (de) 1981-05-27
EP0029416B1 true EP0029416B1 (de) 1985-01-09

Family

ID=11322532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80830091A Expired EP0029416B1 (de) 1979-11-14 1980-10-31 Kühlelement für Lichtbogenschmelzöfen

Country Status (10)

Country Link
EP (1) EP0029416B1 (de)
JP (1) JPS5682376A (de)
AR (1) AR223249A1 (de)
AT (1) ATE11178T1 (de)
BR (1) BR8007415A (de)
DD (1) DD154310A1 (de)
DE (1) DE3069951D1 (de)
ES (1) ES496535A0 (de)
IT (1) IT1126161B (de)
YU (1) YU291080A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19545984A1 (de) * 1995-12-09 1997-06-12 Gutehoffnungshuette Man Kühlplatte für Schmelzöfen

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD151585A3 (de) * 1980-09-02 1981-10-28 Manfred Schingnitz Waermeabschirmung fuer boeden und gefaessabdeckungen
US4443880A (en) * 1982-01-29 1984-04-17 Bbc Brown, Boveri & Company, Ltd. Liquid-cooled cover for arc furnaces
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
FI823951A0 (fi) * 1982-06-10 1982-11-17 Skf Steel Eng Ab Kylpanel foer ljusbaogsugnar samt saett foer framstaellning av kylpanelen
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
US4637034A (en) * 1984-04-19 1987-01-13 Hylsa, S.A. Cooling panel for electric arc furnace
NO155903C (no) * 1985-02-07 1987-06-17 Elkem As Sidevegg i en metallurgisk smelteovn.
JPS6297496U (de) * 1985-12-09 1987-06-22
DE3936467A1 (de) * 1989-11-02 1991-05-08 Eisenmann Kg Maschbau Industrieofen
EP0705906B1 (de) * 1994-10-07 2000-01-26 Sms Schloemann-Siemag Aktiengesellschaft Kühlplatte für Schachtöfen
DE19801425C2 (de) * 1998-01-16 2000-08-10 Sms Demag Ag Kühlplatte für Schachtöfen
FR2775695B1 (fr) * 1998-03-05 2000-04-28 Forcast Int Plaque de refroidissement pour un four a cuve muni d'un revetement refractaire, et notamment pour haut fourneau
FI20020750A (fi) * 2002-04-19 2003-10-20 Outokumpu Oy Menetelmä jäähdytyselementin valmistamiseksi ja jäähdytyselementti
FR2891981B1 (fr) * 2005-10-10 2008-12-05 Fai Production Soc Par Actions Plaque de contact pour electrode de four d'electrometallurgie et procede pour la fabrication d'une telle plaque
US8551660B2 (en) * 2009-11-30 2013-10-08 Tai-Her Yang Reserve power supply with electrode plates joined to auxiliary conductors
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.
KR20180129976A (ko) * 2016-07-13 2018-12-05 어플라이드 머티어리얼스, 인코포레이티드 개선된 기판 지지부

Family Cites Families (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
JPS557827Y2 (de) * 1974-01-23 1980-02-21
JPS5832313B2 (ja) * 1977-12-06 1983-07-12 山陽特殊製鋼株式会社 電気ア−ク炉用水冷パネル
DE2907511C2 (de) * 1979-02-26 1986-03-20 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Kühlplatte für Schachtöfen, insbesondere Hochöfen, und Verfahren zur Herstellung derselben

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19545984A1 (de) * 1995-12-09 1997-06-12 Gutehoffnungshuette Man Kühlplatte für Schmelzöfen
DE19545984B4 (de) * 1995-12-09 2005-02-10 Sms Demag Ag Kühlplatte für Schmelzöfen

Also Published As

Publication number Publication date
ES8201728A1 (es) 1981-12-16
JPS5682376A (en) 1981-07-06
BR8007415A (pt) 1981-05-26
EP0029416A1 (de) 1981-05-27
DD154310A1 (de) 1982-03-10
YU291080A (en) 1983-06-30
ATE11178T1 (de) 1985-01-15
ES496535A0 (es) 1981-12-16
IT7983490A0 (it) 1979-11-14
DE3069951D1 (en) 1985-02-21
AR223249A1 (es) 1981-07-31
IT1126161B (it) 1986-05-14

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