EP2825677B1 - Élément de refroidissement pour un four de fusion - Google Patents

Élément de refroidissement pour un four de fusion Download PDF

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Publication number
EP2825677B1
EP2825677B1 EP13714540.5A EP13714540A EP2825677B1 EP 2825677 B1 EP2825677 B1 EP 2825677B1 EP 13714540 A EP13714540 A EP 13714540A EP 2825677 B1 EP2825677 B1 EP 2825677B1
Authority
EP
European Patent Office
Prior art keywords
cooling
cooling tube
cooling element
cover plate
element according
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.)
Active
Application number
EP13714540.5A
Other languages
German (de)
English (en)
Other versions
EP2825677A1 (fr
Inventor
Christian Neyer
Frank Böert
Christof Dratner
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.)
KME Special Products GmbH and Co KG
Original Assignee
KME Germany GmbH
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Filing date
Publication date
Application filed by KME Germany GmbH filed Critical KME Germany GmbH
Publication of EP2825677A1 publication Critical patent/EP2825677A1/fr
Application granted granted Critical
Publication of EP2825677B1 publication Critical patent/EP2825677B1/fr
Active legal-status Critical Current
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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
    • F27D1/12—Casings; Linings; Walls; Roofs incorporating cooling arrangements
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/10—Cooling; Devices therefor
    • 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
    • F27D2009/0056—Use of high thermoconductive elements
    • F27D2009/0062—Use of high thermoconductive elements made from copper or copper alloy

Definitions

  • the invention relates to a cooling element for a melting furnace, in particular an electric arc furnace having the features of patent claim 1.
  • the DE 44 46 542 A1 describes a furnace vessel for a DC arc furnace with a heat-resistant wall which consists of a plurality of water-cooled steel wall segments in the area above the slag line. These wall segments are attached to a support structure. At least one of the wall segments consists of non-magnetic steel or copper and is preferably arranged on the side of the furnace vessel opposite the power supply device.
  • the individual wall segments comprise horizontally extending tubes made of non-magnetic steel, which are not arranged close to each other, but spaced apart in the vertical direction and by means of metal strips of the same material as the tubes connected to each other, for example, welded. The remaining spaces between the tubes are filled with refractory before or after installation of the wall segment.
  • cooling tubes for an electric arc furnace close together and to connect welding technology.
  • the so-called cooling coils can at the furnace center side facing with Projections, preferably knobs, pins, ribs or the like, be provided to promote the adhesion of refractory material.
  • cooling panels made of steel and / or copper pipes.
  • the booth also includes cooling panels with copper pipes with so-called fin profiles.
  • This is a profile shape in which the finned webs (fins) are formed on the copper pipes, which allow better adhesion of the refractory lining.
  • additional anchors are superfluous, which are partly additionally used in surface smooth, circular tubes.
  • these tube constructions are provided with a steel back plate. Usually this is with a Pipe construction welded.
  • the welding can also be done indirectly by welding special receptacles to the cooling tubes, which in turn are bolted or welded to the steel plate.
  • the present invention seeks to provide a cooling element for a melting furnace with a cost-effective connection between the at least one cooling tube and a cover plate connected to the cooling tube.
  • the cooling element according to the invention for a melting furnace provides in a known manner a cover plate, which may also be referred to as a support plate or base plate. As a rule, it is made of steel. At least one cooling tube is attached to this cover plate. Under a cooling tube may be a cooling tube to be understood, which runs in Meanderform. Thus, essentially the entire cover sheet can be covered, although it has larger dimensions than the cooling pipe.
  • the at least one cooling tube has a bead on its side facing the cover plate, via which it is connected to the cover plate.
  • the bead on the cooling tube increases the distance between the cover plate and the tubular part of the cooling tube. This spacing brings with it considerable advantages, both in terms of the possibilities of attachment and the security of the attachment.
  • Manufacturing technology the bead advantageously forms a uniform unit of material with the cooling tube. Preferably, therefore, it is a bead, which is formed in the extrusion process.
  • the bead therefore preferably extends in the longitudinal direction of the cooling tube.
  • the bead can therefore preferably have a constant width without further post-processing. Additional joining techniques for attaching the bead on the cooling tube omitted.
  • the bead has the advantage that a screw connection between the cooling tube and the cover plate can be realized, without causing the wall thickness of the cooling tube is weakened. It is understood that the bead for a screw must have a sufficient sizing. In particular, the bead must be so large that in relation to the cooling tube radially oriented threaded receptacle can be formed in it. Since such a threaded receptacle should not weaken the geometry of the tube, the depth of the threaded receptacle is preferably smaller than the height of the bead measured in the region of the central longitudinal axis of the threaded receptacle.
  • the bead must be wide enough to be sufficiently resistant to forces transmitted to the bead via a threaded connection.
  • the width of the bead should therefore be in a ratio of 1.5 to 2.5 to the diameter of the threaded receptacle.
  • cooling tubes preferably consist of copper or a copper material which has a lower strength than the cover plate, which preferably consists of steel, it is provided in an advantageous development that threaded sleeves are inserted into the threaded bores.
  • the threaded sleeves can transmit higher forces compared to the actual screw due to their larger diameter.
  • the screw can be done either by screws, which are screwed after the positioning of the tube to the cooling plate from the furnace outer side through the cover plate into the threaded holes in which threaded sleeves are optionally arranged.
  • stud bolts can be attached to the bead, these studs are passed through openings in cover plates and fixed there by nuts.
  • the cooling tube has on its side remote from the bead at least one extending in the longitudinal direction of the cooling tube web, a so-called fin.
  • a so-called fin Preferably, two webs are provided which are mutually arranged at an angle of 30 to 90 °. Preferably, the angle is 60 °.
  • Refractory material can adhere better and more permanently over these webs. By the webs of the positive connection with the refractory material is improved.
  • the webs in combination with the bead arranged on the opposite side also have the advantage that the material used during the extrusion is distributed more uniformly over the circumference of the entire cooling tube. This is production technology advantageous.
  • the cooling elements according to the invention are preferably used above the slag level in the wall region of a furnace vessel of an electric arc furnace.
  • the cooling elements according to the invention can also be arranged in the region of the lid and an exhaust pipe of the furnace vessel.
  • FIG. 1 shows a perspective view of a small portion of a cooling element of a melting furnace, not shown, in particular an electric arc furnace.
  • a cover plate 2 and a below the cover plate arranged cooling tube 3 is shown.
  • the cover plate 2 is substantially larger and forms a wall segment of a furnace vessel. This wall segment is located in the installed position above the melting mirror.
  • the cooling tubes 3 face the furnace inside the melting furnace. They are flowed through in a manner not shown by a coolant. In addition, they are also surrounded in a manner not shown by a refractory material to protect them from the prevailing in the electric arc furnace temperature.
  • the special feature of the cooling element according to the invention is the nature of the design of the cooling tube 3 in connection with the attachment.
  • FIG. 2 shows that the cooling tube 3 is circular, but in its upper in the image plane, ie the cover plate 2 side facing a continuous, in Has longitudinally of the cooling tube 3 extending bead 4.
  • a plurality of threaded receptacles are formed, which are also spaced apart in the longitudinal direction of the cooling tube 3 to each other.
  • a threaded sleeve 6 is inserted, in turn, a screw 7 engages, which are formed through through holes in the cover plate 2.
  • the screws 7 are countersunk screws which do not protrude beyond the outside or surface of the cover plate 2 in the installed position.
  • two webs 8, 9 are arranged on the side facing away from the cover plate 2 side of the cooling tube 3.
  • the webs 8, 9 are used for improved connection of a refractory material not shown with the cooling pipe. 3
  • FIG. 3 shows that the webs 8, 9 are at an angle W of 60 ° to each other and about the same wall thickness as the tubular portion of the cooling tube.
  • the threaded receptacle 5 in the bead 4 has a depth T which is less than or equal to the height H1 of the bead.
  • the depth T of the threaded receptacle 5 is 18 mm at a corresponding height H1 of the bead 4.
  • the threaded receptacle 5 has a diameter of 20 mm for receiving a threaded sleeve M20 x 1.5 with an internal thread M16 x 2.
  • a remaining wall thickness of 10 mm At a width B of the bead 4 of 40 mm results on both sides of the threaded receptacle 5 a remaining wall thickness of 10 mm.
  • the tubular portion of the cooling tube has a wall thickness of 12 mm.
  • the outer diameter is 89.8 mm.
  • the two webs 8, 9 are radially from the tubular portion of the cooling tube 3 from.
  • the webs 8, 9 are about twice as high as they are wide.
  • the cover plate 2 has a thickness of preferably also 12 mm.

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)

Claims (9)

  1. Élément de refroidissement pour un four de fusion avec une tôle de recouvrement (2) et au moins un tube de refroidissement (3) fixé à la tôle de recouvrement (2), caractérisé en ce que l'au moins un tube de refroidissement (3) présente sur son côté tourné vers la tôle de recouvrement (2) un bourrelet (4), par le biais duquel il est relié à la tôle de recouvrement (2), caractérisé en ce que la liaison entre le tube de refroidissement (3) et la tôle de recouvrement (2) est un raccord vissé, dans lequel des logements filetés (5) sont réalisés dans le bourrelet (4).
  2. Élément de refroidissement selon la revendication 1, caractérisé en ce que le bourrelet (4) s'étend dans la direction longitudinale du tube de refroidissement (3).
  3. Élément de refroidissement selon la revendication 1 ou 2, caractérisé en ce que le bourrelet (4) présente une largeur (B) constante.
  4. Élément de refroidissement selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les logements filetés (5) présentent une profondeur (T), qui est inférieure ou égale à la hauteur (H1) du bourrelet (4).
  5. Élément de refroidissement selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la largeur (B) du bourrelet (4) par rapport au diamètre (D1) des logements filetés (5) est dans le rapport 1,5 à 2,5.
  6. Élément de refroidissement selon l'une quelconque des revendications 1 à 5, caractérisé en ce que des douilles filetées (6) sont insérées dans les logements filetés (5).
  7. Élément de refroidissement selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le tube de refroidissement (3) est doté sur son côté éloigné du bourrelet (4) d'au moins une entretoise (8, 9) s'étendant dans le sens longitudinal du tube de refroidissement (3).
  8. Élément de refroidissement selon la revendication 7, caractérisé en ce que deux entretoises (8, 9) sont prévues, qui sont agencées l'une par rapport à l'autre selon un angle de 30° à 90°.
  9. Élément de refroidissement selon l'une quelconque des revendications 1 à 8, caractérisé en ce que le tube de refroidissement (8, 9) est fabriqué par procédé d'extrusion en un matériau à base de cuivre.
EP13714540.5A 2012-03-13 2013-02-22 Élément de refroidissement pour un four de fusion Active EP2825677B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012004868A DE102012004868A1 (de) 2012-03-13 2012-03-13 Kühlelement für einen Schmelzofen
PCT/DE2013/000096 WO2013135221A1 (fr) 2012-03-13 2013-02-22 Élément de refroidissement pour un four de fusion

Publications (2)

Publication Number Publication Date
EP2825677A1 EP2825677A1 (fr) 2015-01-21
EP2825677B1 true EP2825677B1 (fr) 2018-11-07

Family

ID=48049723

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13714540.5A Active EP2825677B1 (fr) 2012-03-13 2013-02-22 Élément de refroidissement pour un four de fusion

Country Status (4)

Country Link
EP (1) EP2825677B1 (fr)
DE (1) DE102012004868A1 (fr)
TR (1) TR201901030T4 (fr)
WO (1) WO2013135221A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012013494A1 (de) 2012-07-09 2014-01-09 Kme Germany Gmbh & Co. Kg Kühlelement für einen Schmelzofen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3053237A (en) 1959-11-02 1962-09-11 Sunrod Mfg Corp Furnace lining
JPS52137505A (en) * 1976-05-13 1977-11-17 Balcke Duerr Ag Tube wall comprising plurality of tubes extending horizontally or slantly in parallel with each other
DE2745622C2 (de) 1977-10-11 1983-02-10 Mannesmann AG, 4000 Düsseldorf Gefäß für einen Metallschmelzofen, insbesondere Lichtbogenofen
DE4446542A1 (de) 1994-12-24 1996-06-27 Abb Management Ag Ofengefäß für einen Gleichstrom-Lichtbogenofen
DE19751356C2 (de) * 1997-11-20 2002-04-11 Sms Demag Ag Kühlelemente für Schachtöfen
US6330269B1 (en) * 2000-02-22 2001-12-11 Amerifab, Inc. Heat exchange pipe with extruded fins

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
TR201901030T4 (tr) 2019-02-21
WO2013135221A1 (fr) 2013-09-19
EP2825677A1 (fr) 2015-01-21
DE102012004868A1 (de) 2013-09-19

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