US3756172A - Furnace roof construction - Google Patents

Furnace roof construction Download PDF

Info

Publication number
US3756172A
US3756172A US00209315A US3756172DA US3756172A US 3756172 A US3756172 A US 3756172A US 00209315 A US00209315 A US 00209315A US 3756172D A US3756172D A US 3756172DA US 3756172 A US3756172 A US 3756172A
Authority
US
United States
Prior art keywords
roof
bricks
operative position
electric arc
rings
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 - Lifetime
Application number
US00209315A
Other languages
English (en)
Inventor
R Brereton
T Lythe
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.)
STEETLY Ltd GB
Steetley Ltd
Original Assignee
Steetley Ltd
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 Steetley Ltd filed Critical Steetley Ltd
Application granted granted Critical
Publication of US3756172A publication Critical patent/US3756172A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F27D1/18—Door frames; Doors, lids, removable covers
    • F27D1/1808—Removable covers
    • F27D1/1816—Removable covers specially adapted for arc furnaces
    • 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
    • F27B3/12—Working chambers or casings; Supports therefor

Definitions

  • At least one element is hinged to a retaining ring that [52] US. Cl 110/99, 13/35, 45322/76429, Supports the roof Ofan electric arc furnace and is [51] Int Cl F23m 5/02 able from an operative position over the roof to an in- [58] Fieid 6 263/46 operative position free of the roof.
  • the individual 52/749 bricks comprising the roof can be held up and/or held down by the hinged element when such is in its operative position, and means are provided for removably [56] References C'ted fixing the hinged element in its operative position.
  • Electric arc furnace roofs are generally dome-shaped and the construction of such roofs is usually accomplished by building up the roof within a retaining ring upon a former remote from the furnace. Installation of the roof and its associated retaining ring is achieved by lifiting the roof and ring bodily onto the electric arc furnace as a unit.
  • refractory bricks e.g., basic bricks
  • the superstructure provides support, or hold-up, by suspending some or all of the bricks 'of the roof therefrom; it prevents bulging upwards of the roof during service i.e., it provides holddown, by contact between the superstructure and the upper surface of some or all of the bricks.
  • the superstructure is attached to the furnace roof and ring while they are on the former. It is therefore necessary to build the roof within the ring on the former and then, as a subsequent operation, to lift on the integral superstructure and attach the bricks on the roof to the superstructure by means of an appropriate attachment.
  • a superstructure for an electric arc furnace roof adapted to hold-up and/or hold-down part of said roof, which superstructure is substantially annular or part annular in plan view and comprises one or more elements independently hinged to a roof retaining ring.
  • such a superstructure can be used in connection with electric arc furnace roofs which are substantially flat in elevation.
  • each element comprises at least two substantially concentric arc-shaped members connected by one or more transverse members.
  • transverse members of the element are hinged at the retaining ring but it is possible for the peripheral arcshaped member to be so hinged instead.
  • any arc-shaped member has an underlying relationship to any shorter arc-shaped members.
  • the arc-shaped members may be adapted to hold-up and/or hold-down the brickwork of the roof.
  • bricks which are held down by arc-shaped members are not held-up.
  • alternate rings of bricks are held down by arcshaped members, the remaining rings of bricks which themselves are not held down being suspended from some or all of the arc-shaped members.
  • each of the bricks in pairs of adjacent rings of bricks are subject to holddown, preferably by a common arc-shaped member.
  • the arc-shaped member is also adapted to hold-up the same pair of adjacent rings of bricks.
  • These pairs of rings may adjoin a similarly collocated pair or pairs of rings, or may adjoin rings of bricks subject to either hold-up only or hold-down only or neither holdup nor hold-down.
  • the invention further provides an electric arc furnace wherein part of the roof is held-up and/or held-down by a superstructure as hereinbefore described.
  • FIG. 1 is a section on the line I l of the view in plan of the roof and superstructure shown in FIG. 2,
  • FIG. 2 is a view in plan of one embodiment of an electric arc furnace roof and its associated superstructure
  • FIGS. 3, 4 and 5 are diagrammatic illustrations of certain methods of hold-up/hold-down used for the roof.
  • FIG. 6 is a view in plan of another embodiment of an electric arc furnace roof and its associated superstructure.
  • FIGS. 1 and 2 there is illustrated a roof indicated generally by 1 and superstructure therefor indicated generally by 2.
  • Roof 1 comprises a series of bricks 3 arranged in concentric rings to form a substantially dome-shaped configuration resting on retaining roof ring 4. Alternate rings of these bricks are provided with suspension tabs 5. The roof 1 is provided with electrode ports 12. The roof may or may not be self-supporting and may or may not be arched.
  • the superstructure 2 consists of a plurality of hinged elements 6 which together in the hinged inwards position, form an annular framework adapted to hold-up and hold-down the underlying brickwork.
  • Each element 6 consists of a series of steel arc-shaped members 7 adapted to overlie alternate rings of bricks, the arcshaped members being joined to and by transverse members 8 which lie radially to the centre of the furace roof.
  • the transverse members 8 are provided with hinges 9 at their outer ends which connect the transverse members with a circular support 10 attached to or integral with the retaining roof ring 4.
  • the elements 6 are folded outwards. When con struction of the roof is completed the elements are folded inwards, each element 6 being locked by means of bolts 11 or other fastening devices to its adjoining elements. The bricks are then attached to the superstructure as necessary. When it is required to repair part of the furnace roof, the necessary number of elements are folded outwards (in FIG. 2 one such element is shown in the folded outwards position) after severing the suspension between the bricks and the elements. The worn bricks can then be removed and replaced without any interference from the hold-up/hold-down superstructure. When the repair has been effected the outwardly folded elements 6 can be returned to their inwardly folded position, locked and the bricks attached to the element by the suspension means.
  • FIGS. 3-5 Some of the various methods which can be used to hold-up/hold-down the bricks are illustrated in FIGS. 3-5.
  • alternate rings of bricks 20 are provided with loops 2i.
  • Hook 22 is attached to the loop of one brick, passed over arc-shaped member 23 and attached to the loop of a brick in the next but one ring of bricks.
  • separate hooks can be used to suspend bricks from either of the adjacent arc-shaped members.
  • the arc-shaped member 23 is located above the intervening ring of bricks and serves to prevent any upward movement of this ring.
  • the rings of bricks can be considered in triplets, one ring 24 of which is located below a hold-down arc-shaped member 25 and two rings 26 and 27 of which are located below an arc-shaped member 28. These latter two rings are provided with loops 29 and 30 which are attached to a hook 31 which passes over members 28 thereby suspending the bricks. Alternatively separate hooks can be used to suspend bricks from either of the adjacent arc-shaped members. All three rings in this arrangement are subject to holddown but only two rings are subject to hold-up. The
  • outermost rings are not subject to hold-up or holddown.
  • each pair of rings such as 34 and 35 are located below an arc-shaped member such as 36.
  • Loops 32 and 33 are attached to a hook 37 which passes over arc-shaped member 36 thereby suspending the rings of bricks.
  • member 36 prevents any excessive rise of these rings of bricks, consequently all the rings of bricks in this embodiment are held-up and held-down.
  • FIGS. 3, 4 and 5 it is not necessary that every brick in any given ring should be suspended and it is possible, for instance, that only alternate bricks in any given ring are suspended. Also in FIGS. 3, 4 and the outer two rings of bricks may be subject to hold-up and/or hold-down although this is not illustrated as being so.
  • FIG. 6 of the drawings there is illustrated an embodiment of the invention wherein, instead of a superstructure substantially annular in plan view as illustrated in FIG. 1, the superstructure 40 is part annular in plan view and consists of one hinged element 41, attached by fasteners 42 to a centrally located support member 43.
  • Support member 43 consists of three arcshaped members 44, 45 and 46 connected to a retaining ring 47 by means of radial supports 48.
  • a roof comprised of a plurality of bricks arranged in a pattern, and a superstructure adapted for holding up and/or holding down at least a part of said bricks, said furnace including a roof retaining ring upon which the outer, lower portion of said roof rests, and said superstructure including: at least one superstructure element hinged at one end thereof to said retaining ring, whereby said element is pivotally movable from an operative position lying over said roof, to an inoperative position wherein said element is free of said roof to provide access to bricks lying thereunder when said element is in its operative position, said element when in said operative position having means for holding up and/or holding down at least some of the bricks lying thereunder; and releasable means engageable with said element, and operable for fixing said element in said operative position.
  • said element comprises: at least two spaced, substantially concentric arc-shaped members, connected by at least one transverse member, said transverse member being hinged at its outer end to said retaining ring.
  • said means for fixing said element in its operative position includes: a structural member supported over the central portion of said roof; and removable fastener means adapted to secure the inner end of said element to said supported structural member.

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)
  • A Measuring Device Byusing Mechanical Method (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)
US00209315A 1970-12-22 1971-12-17 Furnace roof construction Expired - Lifetime US3756172A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6086370 1970-12-22

Publications (1)

Publication Number Publication Date
US3756172A true US3756172A (en) 1973-09-04

Family

ID=10486214

Family Applications (1)

Application Number Title Priority Date Filing Date
US00209315A Expired - Lifetime US3756172A (en) 1970-12-22 1971-12-17 Furnace roof construction

Country Status (12)

Country Link
US (1) US3756172A (fi)
AU (1) AU459294B2 (fi)
CA (1) CA937963A (fi)
DE (1) DE2163613A1 (fi)
ES (1) ES398199A1 (fi)
FI (1) FI51533C (fi)
FR (1) FR2119587A5 (fi)
GB (1) GB1331459A (fi)
IT (1) IT943319B (fi)
NO (1) NO129589B (fi)
SE (1) SE376298B (fi)
ZA (1) ZA718386B (fi)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3876818A (en) * 1973-08-13 1975-04-08 Republic Steel Corp Electric arc furnace wall including water cooled bezel ring
US3967048A (en) * 1975-06-06 1976-06-29 Longenecker Levi S Dual ring supported roof for electric arc furnace
US3976424A (en) * 1975-02-18 1976-08-24 Sola Basic Industries, Inc. Refractory roof construction for the heating chamber of an industrial furnace
US4021603A (en) * 1975-10-22 1977-05-03 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Roof for arc furnace
US4063028A (en) * 1976-06-14 1977-12-13 Longenecker Levi S Suspended roof for electric arc furnace
US4107449A (en) * 1976-09-20 1978-08-15 Oleg Mikhailovich Sosonkin Water-cooled roof of electric-arc furnace
US4152534A (en) * 1976-12-08 1979-05-01 Kyoei Seiko Kabushiki Kaisha Furnace roof for the electric arc furnace
US5537805A (en) * 1995-04-20 1996-07-23 Allman; James W. Apparatus and method for constructing a masonry header
US20050229502A1 (en) * 2002-11-13 2005-10-20 The Queen's University Of Belfast Concrete arch and method of manufacture
US20080271656A1 (en) * 2007-05-01 2008-11-06 Fred Lindeman Removable filler module
US20110058589A1 (en) * 2009-09-09 2011-03-10 Fred Lindeman High temperature industrial furnace roof system
US20140029643A1 (en) * 2011-03-30 2014-01-30 Hyundai Steel Company Roof for electric furnace

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2552865B1 (fr) * 1983-09-30 1985-12-27 Clecim Sa Four electrique a arc muni de panneaux amovibles
FR2575777B1 (fr) * 1985-01-08 1987-03-20 Zementkombinat Couverture de beton refractaire en elements prefabriques

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1773359A (en) * 1928-04-10 1930-08-19 Glenn E Hilliard Method of making furnace roofs
US2551941A (en) * 1948-10-04 1951-05-08 Albert E Greene Tilting furnace roof
US3367292A (en) * 1966-02-09 1968-02-06 Dresser Ind Electric furnace roof construction
US3448703A (en) * 1967-12-26 1969-06-10 Dresser Ind Dome-shaped electric furnace roof construction
GB1205692A (en) * 1968-03-07 1970-09-16 Geo P Reintjes Co Inc Roof for tiltable electric furnace

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1773359A (en) * 1928-04-10 1930-08-19 Glenn E Hilliard Method of making furnace roofs
US2551941A (en) * 1948-10-04 1951-05-08 Albert E Greene Tilting furnace roof
US3367292A (en) * 1966-02-09 1968-02-06 Dresser Ind Electric furnace roof construction
US3448703A (en) * 1967-12-26 1969-06-10 Dresser Ind Dome-shaped electric furnace roof construction
GB1205692A (en) * 1968-03-07 1970-09-16 Geo P Reintjes Co Inc Roof for tiltable electric furnace

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3876818A (en) * 1973-08-13 1975-04-08 Republic Steel Corp Electric arc furnace wall including water cooled bezel ring
US3976424A (en) * 1975-02-18 1976-08-24 Sola Basic Industries, Inc. Refractory roof construction for the heating chamber of an industrial furnace
US3967048A (en) * 1975-06-06 1976-06-29 Longenecker Levi S Dual ring supported roof for electric arc furnace
US4021603A (en) * 1975-10-22 1977-05-03 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Roof for arc furnace
US4063028A (en) * 1976-06-14 1977-12-13 Longenecker Levi S Suspended roof for electric arc furnace
US4107449A (en) * 1976-09-20 1978-08-15 Oleg Mikhailovich Sosonkin Water-cooled roof of electric-arc furnace
US4152534A (en) * 1976-12-08 1979-05-01 Kyoei Seiko Kabushiki Kaisha Furnace roof for the electric arc furnace
US5537805A (en) * 1995-04-20 1996-07-23 Allman; James W. Apparatus and method for constructing a masonry header
US20050229502A1 (en) * 2002-11-13 2005-10-20 The Queen's University Of Belfast Concrete arch and method of manufacture
US7204058B2 (en) * 2002-11-13 2007-04-17 The Queen's University Of Belfast Concrete arch and method of manufacture
US20080271656A1 (en) * 2007-05-01 2008-11-06 Fred Lindeman Removable filler module
US8428096B2 (en) 2007-05-01 2013-04-23 Merkle International, Inc. Removable filler module
US20110058589A1 (en) * 2009-09-09 2011-03-10 Fred Lindeman High temperature industrial furnace roof system
US8693518B2 (en) 2009-09-09 2014-04-08 Merkle International Inc. High temperature industrial furnace roof system
US20140029643A1 (en) * 2011-03-30 2014-01-30 Hyundai Steel Company Roof for electric furnace
US10132566B2 (en) * 2011-03-30 2018-11-20 Hyundai Steel Company Roof for electric furnace

Also Published As

Publication number Publication date
FI51533B (fi) 1976-09-30
GB1331459A (en) 1973-09-26
ES398199A1 (es) 1975-05-16
IT943319B (it) 1973-04-02
NO129589B (fi) 1974-04-29
ZA718386B (en) 1973-02-28
DE2163613A1 (de) 1972-07-13
AU3718371A (en) 1973-06-28
FR2119587A5 (fi) 1972-08-04
SE376298B (fi) 1975-05-12
CA937963A (en) 1973-12-04
AU459294B2 (en) 1975-03-20
FI51533C (fi) 1977-01-10

Similar Documents

Publication Publication Date Title
US3756172A (en) Furnace roof construction
CA1154066A (en) Cover for a metal-melting furnace, more particularly an electric-arc furnace
SU1194294A3 (ru) Водоохлаждаема колпакова крышка дл электропечи с трем электродами
US3385241A (en) Electric furnace roof
US3682457A (en) Hanging bosh construction with means allowing for thermal expansion
US4152534A (en) Furnace roof for the electric arc furnace
US2565355A (en) Bubble tray and support structure
US1541486A (en) Furnace roof
US4227875A (en) Rotary hearth for calcining kiln
US3358986A (en) Stockline lining for a blast furnace
SU853067A1 (ru) Платформа дл производства работВНуТРи дОМЕННОй пЕчи
US4045161A (en) Rotary kiln having a planetary row of cooler tubes
US3350082A (en) Tiltable support mechanism for crucible or converter
US4387464A (en) Vessel for an electro furnace
US3144842A (en) Supporting structure
US3198148A (en) Metallurgical furnace roof
US2710747A (en) Device for protecting blast furnace linings
US3541998A (en) Cooling sleeve for exhaust port of electric furnace roof
SU477292A1 (ru) Арочный свод мартеновской печи
SU284793A1 (ru) Свод
US4605206A (en) Suspended seal ring for ladle preheater
US4003558A (en) Supporting structure for blast furnaces
US3187695A (en) Refractory roof
SU786459A1 (ru) Подвесной свод дуговой печи
US3453787A (en) Furnace roof construction