US3554505A - Walking beam furnaces - Google Patents

Walking beam furnaces Download PDF

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Publication number
US3554505A
US3554505A US783223A US3554505DA US3554505A US 3554505 A US3554505 A US 3554505A US 783223 A US783223 A US 783223A US 3554505D A US3554505D A US 3554505DA US 3554505 A US3554505 A US 3554505A
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United States
Prior art keywords
zone
lining
beams
furnace
charge
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Expired - Lifetime
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US783223A
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English (en)
Inventor
Pierre Dessarts
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Heurtey SA
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Heurtey SA
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    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path
    • F27B9/201—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path walking beam furnace
    • F27B9/202—Conveyor mechanisms therefor
    • F27B9/207—Conveyor mechanisms therefor consisting of two or more conveyors
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets

Definitions

  • the beams of the [52] U.S. Cl 263/6 first zone include charge supports which maintain the charge [51] Int. Cl F27b 9/14 spaced from the furnace bottom and the beams of the second [50] Field of Search 263/6, 6A zone a bottom coating on which the charge rests directlyv WALKING BEAM FURNACES It is customary practice to heat billets, blooms or slabs in walking beam fumaces prior to rolling, forging, or the like.
  • the first includes one .or more metal beams upon each of which rests acontinuous'bed of refractory products which support the charge as it moves along. These beams are inserted into one or more longitudinal grooves in the furnace hearth. The charge is caused to move forward by successive lifting, advancing, descending and retreating motions of said beams.
  • the second constructional form includes metal beams, some stationary and others mobile, supported by columns which pass through a hearth of refractory products, the charge to be treated'being thus kept above the furnace-bottom at a level appropriate for ensuring heating of the upper and lower parts of the charge elements.
  • the beams and their supporting columns may be made of refractory steel.
  • the columns must be cooled, for instance by internal water circulation, and the beams likewise consist of water-cooled tubes similar to those used in pusher furnacesl v With regard to heating of the furnace charge elements, in
  • the present invention overcomes this drawback by providing a furnace in which the charge elements are heated, for instance up to the rolling temperature, in a section equipped with beams of the second type, while another section is associated with beams of the-first type andconstitutes a temperature equalization zone.
  • the furnace comprises at least one monobloc-type travelling beam with furriace,”heating may provided common actuating elements, which travelling and stationary whereasin prior art furnaces such columns are rigidly connected to a general frame located beneath a refractory hearth, and said columns traverse the latter'through openings which filled with oxides or like products dropping .off the charge elements undergoing treatment and cannot be cleaned conveniently.
  • the improved furnace according to the present invention offers the advantage of achieving sealing by a continuous hydraulic seal of conventional type which, as experience has demonstrated, due to the narrowness of the gap between the travelling'beams and the furnace bottom, will allow passage only of small amounts of oxides or other waste that can easily be eliminated from such seals, which seals furthermore do not constitute cold spots detrimental in particular to the quality of production.
  • FIG. 1 shows schematically, in longitudinal section along the line H of FIG. 2, a walking beam fumace of the kind disclosed.
  • FIG. 2 is a section through a horizontal plane taken along the line 11-11 of FIG. 1. 1 I
  • FIG. 3 is asection on the line III-III of FIG. 2.
  • FIG. 4 is a section on the line IV-IV of FIG. 1.
  • FIG. 5 is a section on theline V-V of FIG. 1.
  • FIG. 6 is a section on the line VI-Vl of FIG. 1.
  • FIG. 7 is a view corresponding to FIG. 1, showing an alternative embodirnent with two independent beams.
  • the charge chamber 1 of a furnace is provided at its top with burners 2 and in its frontal walls with an opening 3 for insertion of the charge elements to be treated and an opening 4 for drawing these charge elements after treatment.
  • Charge chamber 1 contains a hearth whose walking beam has mobile portions which rest on a metal member 5 capable of vertical and longitudinal motion.
  • the members 5 extend along the full lengthof charge chamber l and rest on sets of rollers 6 whose axles are carried on one end of rockingly mounted levers 7 whose other ends are interconnected by rods 8, one of these rods being connected to the power rod of a vertical hoisting jack 9.
  • Members 5 are further connected to the power rod of a longitudinal advance jack l0..Thus it is possible to cause the members 5 to rise, to move longitudinally inthe without entrainingany charge elements during this ultimate phase of their motion.
  • the members 5 are provided along part of their length, on the side of charge insertion opening 3, with a refractory lining I 1. Along a complementary part of their length, on the side of charge drawing opening 4, the members 5 carry a step 12 supporting a refractory lining 13. A refractory wall 14 interconnects the two linings 11 and 13.
  • refractory lining 11 Upstanding from refractory lining 11 are columns 16 which support stringers 17 forming extensions of the lining 13.
  • a walking beam of this kind is capable of cooperating with fixed hearth elements which flank it and include, in the region of the mobile stringers l7, fixed stringers 18 likewise supported by columns 19 and bearing against the uprights through the medium of spacers 20, while in the region of lining 13 the fixed hearth elements are provided with a refractory wall 21.
  • a rectangular liquid channel 22 is provided beneath the level of the members 5 and has dipping into it a sealing skirt formed with relatively low portions 23 in the area of lining 11 and taller portions 24. in the area of lining l3, and the tops of these skirt portions join leaktightly to said linings ll and'l3.
  • companion skirts 25 and 26 are provided at the periphery of the opening formed in the refractory coating .of the fixed hearth portions, the overall aim being to reduce to a minimum the gap between the fixed and mobile portions of the hearth.
  • the width imparted to channel 22 is small in the longitudinal regions but fairly considerably in the transverse regions in order to permit playof the skirt sections 23 and 24.
  • the columns 16, the columns 19, the associated-spacers 20 and the stringers 17 and 18 are. hollow and may have .a cooling fluid flowing therethrough, for whichinlets. and outlets are provided, although not shown in the drawings.
  • the furnace has twoidentical, parallel walking beams andfthree fixed hearth sections, whereby in the central section the columns 19 form thelegs of a gantry, and this likewise applied to the walking beam columns 16.
  • a first member Sq supportslining 1 l, a wan, l4 and the associated stringers 17 by meansofthe columns 16.
  • a second beam with a raisedmember 5b supports the-coating 13 facing the top of wall 14.
  • Each member 5a and S b comprises its own machinery, with hoisting and longitudinal motion jacks 9a, 100 and 9b, 10b.
  • the step 12 becomes superfluous, but it is preferably to providetwo independent and vertically staggered sealing channels 22a and 22b with associated skirts for each of members 5a, 5b.
  • Awalking beamfurnace comprising at least a first main heating zone for heating individual charge elements, a second main equalizing zone for equalizing the temperatures thereof, beams-in saidfirstzone including charge supports for keeping said charge elements spaced from a corresponding furnace bottom so that said elements are heated on the upper and lower surfaces thereof, and beams in said second zone includinga lining at the same level as the beams in the first zone for supporting said elements such that they rest directly on said lining so that the elements are directly heated on the upper surfaces thereof and temperature equalized on said lower surfaces by contactwith said lining, said charge elements being individually transferred through the furnace by direct and successive travel on said beams.
  • a furnace according to claim 1 in which said supports for maintaining said charge elements spaced from said furnace bottom comprise columns, and stringers supported on the columns, said columns and stringers including cooling means in which is circulated a cooling fluid.
  • a furnace according to claim 4 comprising a lining in said first zone on which said columns are fitted, means for moving said linings, in said first and second zones in grooves provided in stationary portions of the furnace bottom, and sealing meansbetween the linings and stationary portions including skirts dipping into a continuous hydraulic seal associated with said portions.
  • a furnace according to claim 1- comprising a lining in said first zone supporting said beams, said lining in said second zone being raised above the lining in said first zone, said charge supports comprising conveyor stringers in said first zone mounted on the lining therein and disposed substantially in the same plane as said lining in said second zone.
  • a furnaceaccording to claim 7 comprising a refractory wall connecting said linings to form a step therebetween.
  • furnace bottom-ineachzone is substantially coplanar with the associated lining therein

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Tunnel Furnaces (AREA)
US783223A 1967-12-20 1968-12-12 Walking beam furnaces Expired - Lifetime US3554505A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR133033 1967-12-20

Publications (1)

Publication Number Publication Date
US3554505A true US3554505A (en) 1971-01-12

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US783223A Expired - Lifetime US3554505A (en) 1967-12-20 1968-12-12 Walking beam furnaces

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US (1) US3554505A (enrdf_load_stackoverflow)
BE (1) BE725168A (enrdf_load_stackoverflow)
DE (1) DE1813605B2 (enrdf_load_stackoverflow)
ES (1) ES361683A1 (enrdf_load_stackoverflow)
FR (1) FR1561203A (enrdf_load_stackoverflow)
GB (1) GB1200837A (enrdf_load_stackoverflow)
LU (1) LU57524A1 (enrdf_load_stackoverflow)
NL (1) NL6818311A (enrdf_load_stackoverflow)
SE (1) SE343886B (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3687427A (en) * 1969-11-24 1972-08-29 Taketoshi Mori Skid beam supporting structure for the heating furnace of walking beam type
US3792965A (en) * 1970-11-30 1974-02-19 Tabougnar Ab Walking beam furnace
US4025298A (en) * 1974-11-08 1977-05-24 Midland-Ross Corporation Walking beam furnace for round bar and the like
US4079921A (en) * 1976-06-18 1978-03-21 Lee Wilson Engineering Company, Inc. Apparatus and method for continuous treatment of metal coils or the like
DE3141130A1 (de) * 1981-10-16 1983-04-28 Ruhrgas Ag, 4300 Essen Hubbalkenfoerderer
US4388068A (en) * 1980-08-06 1983-06-14 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Metal heating furnace
US4427371A (en) 1982-01-20 1984-01-24 Loftus Furnace Company Pusher furnace with soak zone lifter
US4863376A (en) * 1987-02-24 1989-09-05 Italimpianti S.P.A. Walking beam furnace
WO1999051786A1 (en) * 1998-04-07 1999-10-14 NIEMI, Göran A direct-heated furnace and a method of reheating steel semis
CN110527811A (zh) * 2018-05-23 2019-12-03 本田技研工业株式会社 辊输送装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT992325B (it) * 1973-08-08 1975-09-10 Italimpianti Procedimento e dispositivo per il riscaldo accelerato di billette e simili nei forni a longheroni
EP0059306A3 (en) * 1981-01-23 1982-10-13 ITALIMPIANTI Società Italiana Impianti P.a. Walking beam furnace
DE3144146C1 (de) * 1981-11-06 1987-12-23 Bredtmann - Girke Industrieofenbau GmbH, 4630 Bochum Schnellerwärmungsofen
DE3334015C2 (de) * 1983-09-21 1985-08-22 Didier Engineering Gmbh, 4300 Essen Oberbeheizter Hubherdofen für das Erwärmen von Knüppeln, Blöcken oder dergleichen Wärmgut

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1739250A (en) * 1927-06-24 1929-12-10 Herman F Hoevel Furnace
US2039203A (en) * 1932-10-27 1936-04-28 Ogilvy-Webb Arthur William Furnace apparatus for the heat treatment of metallic or other bodies
US3373980A (en) * 1966-02-28 1968-03-19 Tabougnar Ab Walking beam furnace for effecting different feed speeds of the charge

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1739250A (en) * 1927-06-24 1929-12-10 Herman F Hoevel Furnace
US2039203A (en) * 1932-10-27 1936-04-28 Ogilvy-Webb Arthur William Furnace apparatus for the heat treatment of metallic or other bodies
US3373980A (en) * 1966-02-28 1968-03-19 Tabougnar Ab Walking beam furnace for effecting different feed speeds of the charge

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3687427A (en) * 1969-11-24 1972-08-29 Taketoshi Mori Skid beam supporting structure for the heating furnace of walking beam type
US3792965A (en) * 1970-11-30 1974-02-19 Tabougnar Ab Walking beam furnace
US4025298A (en) * 1974-11-08 1977-05-24 Midland-Ross Corporation Walking beam furnace for round bar and the like
US4079921A (en) * 1976-06-18 1978-03-21 Lee Wilson Engineering Company, Inc. Apparatus and method for continuous treatment of metal coils or the like
US4388068A (en) * 1980-08-06 1983-06-14 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Metal heating furnace
DE3141130A1 (de) * 1981-10-16 1983-04-28 Ruhrgas Ag, 4300 Essen Hubbalkenfoerderer
US4427371A (en) 1982-01-20 1984-01-24 Loftus Furnace Company Pusher furnace with soak zone lifter
US4863376A (en) * 1987-02-24 1989-09-05 Italimpianti S.P.A. Walking beam furnace
WO1999051786A1 (en) * 1998-04-07 1999-10-14 NIEMI, Göran A direct-heated furnace and a method of reheating steel semis
CN110527811A (zh) * 2018-05-23 2019-12-03 本田技研工业株式会社 辊输送装置
CN110527811B (zh) * 2018-05-23 2022-03-18 本田技研工业株式会社 辊输送装置

Also Published As

Publication number Publication date
DE1813605A1 (de) 1969-07-03
BE725168A (enrdf_load_stackoverflow) 1969-05-16
DE1813605B2 (de) 1971-02-25
ES361683A1 (es) 1970-11-16
LU57524A1 (enrdf_load_stackoverflow) 1969-03-27
GB1200837A (en) 1970-08-05
SE343886B (enrdf_load_stackoverflow) 1972-03-20
FR1561203A (enrdf_load_stackoverflow) 1969-03-28
NL6818311A (enrdf_load_stackoverflow) 1969-06-24

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