EP0010286B1 - Cooled panels for walls of electric furnaces - Google Patents

Cooled panels for walls of electric furnaces Download PDF

Info

Publication number
EP0010286B1
EP0010286B1 EP79103972A EP79103972A EP0010286B1 EP 0010286 B1 EP0010286 B1 EP 0010286B1 EP 79103972 A EP79103972 A EP 79103972A EP 79103972 A EP79103972 A EP 79103972A EP 0010286 B1 EP0010286 B1 EP 0010286B1
Authority
EP
European Patent Office
Prior art keywords
elements
panel
furnace
panel according
panels
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
EP79103972A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0010286A1 (en
Inventor
Paolo Fontanini
Adriano Meroi
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.)
DANIELI ENGINEERING SpA
Danieli and C Officine Meccaniche SpA
Original Assignee
DANIELI ENGINEERING SpA
Danieli and C Officine Meccaniche 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
Application filed by DANIELI ENGINEERING SpA, Danieli and C Officine Meccaniche SpA filed Critical DANIELI ENGINEERING SpA
Priority to AT79103972T priority Critical patent/ATE3587T1/de
Publication of EP0010286A1 publication Critical patent/EP0010286A1/en
Application granted granted Critical
Publication of EP0010286B1 publication Critical patent/EP0010286B1/en
Expired legal-status Critical Current

Links

Images

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
    • 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
    • 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
    • F27D1/14—Supports for linings
    • F27D1/145—Assembling elements
    • 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
    • F27D2009/0045—Cooling of furnaces the cooling medium passing a block, e.g. metallic
    • F27D2009/0048—Cooling of furnaces the cooling medium passing a block, e.g. metallic incorporating conduits for the medium

Definitions

  • This invention relates to panels cooled by water or other suitable liquid for forming the walls of electric furnaces, wherein, as well known, smelting takes place by electric discharges.
  • An ideal panel which may be part of a wall or may form the whole wall of an electric furnace should fulfill the following requirements:
  • steel blocks are used as having a built-in inner coil.
  • the water path is fixed therein, thus assuring a smooth flow, but the disadvantage arises that the panel smelting involves a complicated operation, the reduced size of the panel causing the increase of outside connections.
  • a further disadvantage is that during use the considerable size of the panel causes cracks on the melted inner wall thereof. In this case, it is also required to provide panels for. each specific requirement. Thus, different panels should be provided for each type of furnace and in a same furnace panels which are different as to characteristics and size according to the different use zones or sites.
  • the U.S.A. Patent 3.829.595 shows a furnace of single piece panel containing their tubes, even these being in a single piece.
  • the tubes contained in these panels are connected to one another.
  • the object of the present invention is to make panels
  • these elements comprise an outer body which is inserted over a special tube or by a tube portion which is incorporated in an outer body, said tubes serving for the passage or cooling water or other fluid.
  • a preferred solution also provides that the panel surface facing inwardly of the furnace is shaped so as to retain therein insulating material comprising slags produced by the furnace itself, or refractory material which is suitably before hand.
  • the modular elements are assembled by welding to some of the elements comprising curves or bendings some tube lengths over which one or more elements provided with corresponding holes are inserted, then further curved elements are welded to the free ends of said tubes, thus providing a circuit or path for the cooling fluid.
  • Such a formed panel can now be bent for adaptation to the diameter of the furnace to which it will be applied.
  • portions of refractory material can be incorprated between the various modular elements.
  • Fig. 1 shows a portion of a wall of a furnace, in which a portion of a panel 1 is shown at right to line IV--IV, while a portion of a panel 18 adjacent to the first mentioned panel is shown at the left to line IV-IV.
  • the supporting structure comprising two vertical tie rods 13 passing into holes 19 suitably provided in each of the modular elements. Said tie rods 13 are then secured to the furnace housing 14.
  • Each panel comprises several modular elements, which will now be described one by one.
  • Element 2 (Figs. 1, 2 and 3) comprises a block containing two parallel holes shown at 2a respectively, in which tubes 16 are inserted during assembling.
  • Elements 3 and.4 (Figs. 1 and 4) comprise blocks containing curved or bent tubes 3t and 4t, respectively.
  • Element 6 is quite similar to element 2, but the distance or spacing between the parallel holes 6a, and hence between tubes 16 therein contained is larger than that between tubes 16 of said element 2.
  • Element 5 comprises a semi- element having a single hole 5a and is for completion of the panel.
  • element 15 is similar to element 5, but comprises a curved element 15a connected to tube 8 or 9, respectively serving for the return and delivery of the cooling fluid.
  • the assembling of the various elements, so that the latter will form a panel may be effected by merely taking elements 3 or 4 comprising a curve or bending, preferably projecting out of the element, and welding on these tube ends some lengths of straight tube 16 of a suitable size, then inserting on such straight tubes the preselected elements, such as those of type 2, 6 or the like, finally welding to the end of these straight tubes other curved tubes 3a or 4a, and two elements 15, 1 5a with associated tube 8 and 9, thus forming a continuous circuit panel.
  • the panel thus obtained will be curved for adaptation to the furnace diameter.
  • refractory bricks 7 are incorporated in the panel, bricks which are supported by the adjoining elements.
  • gaps 10 and 11 in the vertical and horizontal joint zones, respectively, between two adjoining elements are filled with refractory material or simply with slags produced by the furnace operation, thus rendering the structure sufficiently monolithic.
  • the side wall of the furnace shown in Fig. 5 comprises nine panels, of which six are for example of a length L1 of 1910 mm and a height H of 1200 mm, two are of a length L2 of 1680 mm and a height H2 of 950 mm, and finally one of a length L3 of 920 mm and a height H3 of 530 mm.
  • the asembly of these panels may form the side walls of an electric furnace of about 50t, the circumference T of which is 16,014 mm.
  • reference numeral 26 denotes the tapping hole and 17 the casting or pouring level. Above this level, the side walls of the furnace first comprise a refractory 12 of a minimal height H4 of 550 mm, this height increasing in proximity of tapping hole 26 and of the gate for the admission of additive materials.
  • Fig. 5 three panels have been shown along with the structural modular elements thereof, the water circuit having been shown by arrows and dashed lines indicating the path for the tubes in the elements.
  • the elements are arranged so as to be offset in height, each row relative to the adjacent row, but this is not the only possible solution, as shown in one of the panels of Fig. 5.
  • the darkened zones in each of the panels are those in which refractory material 7 has been inserted.
  • panels can be provided of different characteristics along the height thereof, having for example lower zones with a larger cooling factor than that of the upper zones, as predicated. This can be done only because of the availability of small modular casting elements.
  • the furnace cooling can be differentiately balanced: at the hot locations, a higher cooling is provided, while at those less liable to heat, cooling is smaller.
  • each element is formed with cavities 2b and 6b, in which refractory material is inserted, and in any case against which the furnace slags will deposit, thus increasing the wall insulation and hence decreasing the heat exchange and increasing the panel life.
  • cavities may be of any shape and pattern as far as capable of retaining the insulating material.
  • refractory bricks along with cavities 2b and 6b carrying refractory material or slags allows a lower removal of calories from the cooling water and accordingly a lower energy consumption for steel smelting.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Details (AREA)
  • Cartons (AREA)
EP79103972A 1978-10-23 1979-10-15 Cooled panels for walls of electric furnaces Expired EP0010286B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79103972T ATE3587T1 (de) 1978-10-23 1979-10-15 Kuehlaggregat fuer die waende elektrischer oefen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2900778 1978-10-23
IT29007/78A IT1160001B (it) 1978-10-23 1978-10-23 Pannelli raffreddati per pareti di forni elettrici

Publications (2)

Publication Number Publication Date
EP0010286A1 EP0010286A1 (en) 1980-04-30
EP0010286B1 true EP0010286B1 (en) 1983-05-25

Family

ID=11225650

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79103972A Expired EP0010286B1 (en) 1978-10-23 1979-10-15 Cooled panels for walls of electric furnaces

Country Status (5)

Country Link
EP (1) EP0010286B1 (es)
AT (1) ATE3587T1 (es)
DE (1) DE2965520D1 (es)
ES (1) ES246367Y (es)
IT (1) IT1160001B (es)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4435814A (en) * 1982-01-29 1984-03-06 Bbc Brown, Boveri & Company, Limited Electric furnace having liquid-cooled vessel walls
FR2552105B1 (fr) * 1983-09-21 1988-10-28 Usinor Perfectionnement aux plaques de refroidissement pour hauts-fourneaux
DE4431293A1 (de) * 1994-09-02 1996-03-07 Abb Management Ag Ofengefäß für einen Gleichstrom-Lichtbogenofen
DE19751356C2 (de) * 1997-11-20 2002-04-11 Sms Demag Ag Kühlelemente für Schachtöfen
DE10061359C2 (de) * 2000-12-09 2003-01-02 Didier M & P Energietechnik Gm Kühleinrichtung für Schachtöfen

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2009898A (en) * 1977-12-06 1979-06-20 Sanyo Special Steel Co Ltd Water-cooled panel for use in an electric furnace

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE957758C (de) * 1957-01-17 Ernst Thomas, Hemer (Westf) Kuhlkasten, welcher auswechselbar in Ausnehmungen der Wände von Schmelzofen, insbesondere Hochofen, einsetzbar ist
DE655249C (de) * 1938-01-12 Emil Grimm Kuehlkasten fuer metallurgische OEfen
JPS505125B1 (es) * 1968-10-22 1975-02-28
FR2169649A5 (es) * 1972-01-25 1973-09-07 Ishikawajima Harima Heavy Ind
JPS49118635U (es) * 1973-02-08 1974-10-11
DE2719165C2 (de) * 1977-04-29 1983-02-03 Thyssen AG vorm. August Thyssen-Hütte, 4100 Duisburg Kühlelement für einen metallurgischen Ofen
DE2745622C2 (de) * 1977-10-11 1983-02-10 Mannesmann AG, 4000 Düsseldorf Gefäß für einen Metallschmelzofen, insbesondere Lichtbogenofen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2009898A (en) * 1977-12-06 1979-06-20 Sanyo Special Steel Co Ltd Water-cooled panel for use in an electric furnace

Also Published As

Publication number Publication date
ES246367U (es) 1980-02-01
EP0010286A1 (en) 1980-04-30
ATE3587T1 (de) 1983-06-15
IT7829007A0 (it) 1978-10-23
IT1160001B (it) 1987-03-04
DE2965520D1 (en) 1983-07-07
ES246367Y (es) 1980-08-16

Similar Documents

Publication Publication Date Title
US4455017A (en) Forced cooling panel for lining a metallurgical furnace
US3829595A (en) Electric direct-arc furnace
EP0010286B1 (en) Cooled panels for walls of electric furnaces
ES2296731T3 (es) Tuberia de intercambio de calor con aletas extruidas.
CN104964559A (zh) 矿热炉用底部环及其制造方法
ES263035U (es) Elemento de pared hecho de tubos y enfriado por agua para hornos de fusion.
KR19990007157A (ko) 용광로용 냉각판
US4391587A (en) Slab heating furnace
RU2264590C2 (ru) Охлаждающая батарея для шахтных печей
HUT65329A (en) Fire-proof soldier blocks for covering tube of glass melting furnace and method to make the glass melting tube work
EP0794393B1 (en) Cast, light-metal, polygonal heat exchanger having a spiral-shaped water duct
US4434495A (en) Cooling pipe structure for arc furnace
US4170713A (en) Channel-type induction furnace
KR100413503B1 (ko) 쓰레기 열처리 설비용 격자블럭 및 그것을 구비한 쓰레기 열처리 설비
CN215209570U (zh) 精密线材热处理用浸没式均匀冷却水槽
JPH1054667A (ja) るつぼ炉
WO2002081757A1 (en) Cooling plate for a metallurgical furnace and method for manufacturing such a cooling plate
JP2841147B2 (ja) 氷蓄熱槽及び氷蓄熱槽用の熱交換コイル
US3212478A (en) Brick-lined, water-cooled industrial furnace door
JP6999473B2 (ja) 自溶炉の冷却方法及び自溶炉の冷却構造
JPS6127115Y2 (es)
SU910534A1 (ru) Ванна стекловаренна печь
SU1453138A1 (ru) Печь дл нагрева слитков
SU934178A1 (ru) Плита перекрыти ванны дуговой печи
JPS5815473Y2 (ja) 風滓製造用溶滓鍋

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB SE

17P Request for examination filed

Effective date: 19800902

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: DANIELI ENGINEERING SPA

Owner name: DANIELI & C. OFFICINE MECCANICHE S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19830525

REF Corresponds to:

Ref document number: 3587

Country of ref document: AT

Date of ref document: 19830615

Kind code of ref document: T

ET Fr: translation filed
REF Corresponds to:

Ref document number: 2965520

Country of ref document: DE

Date of ref document: 19830707

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PUE

Owner name: DANIELI & C. OFFICINE MECCANICHE S.P.A.

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

EAL Se: european patent in force in sweden

Ref document number: 79103972.0

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19950922

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19951006

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19951013

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19951017

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19951018

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19951101

Year of fee payment: 17

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19961015

Ref country code: AT

Effective date: 19961015

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19961016

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Effective date: 19961031

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19961015

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19970630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19970701

EUG Se: european patent has lapsed

Ref document number: 79103972.0

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST