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EP1298400A1 - Four à arc - Google Patents

Four à arc Download PDF

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Publication number
EP1298400A1
EP1298400A1 EP02019320A EP02019320A EP1298400A1 EP 1298400 A1 EP1298400 A1 EP 1298400A1 EP 02019320 A EP02019320 A EP 02019320A EP 02019320 A EP02019320 A EP 02019320A EP 1298400 A1 EP1298400 A1 EP 1298400A1
Authority
EP
European Patent Office
Prior art keywords
vessel
lining
arc furnace
furnace according
wall
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.)
Granted
Application number
EP02019320A
Other languages
German (de)
English (en)
Other versions
EP1298400B1 (fr
Inventor
Manfred Schubert
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.)
SMS Siemag AG
Original Assignee
SMS Demag AG
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 SMS Demag AG filed Critical SMS Demag AG
Publication of EP1298400A1 publication Critical patent/EP1298400A1/fr
Application granted granted Critical
Publication of EP1298400B1 publication Critical patent/EP1298400B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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; Electric arc furnaces ; Tank furnaces
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces
    • F27B3/24—Cooling arrangements
    • 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; Electric arc furnaces ; Tank furnaces
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces
    • F27B3/12—Working chambers or casings; Supports therefor
    • F27B3/16—Walls; Roofs
    • 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 or removable covers
    • F27D1/1808—Removable covers
    • F27D1/1816—Removable covers specially adapted for arc furnaces

Definitions

  • the invention relates to an electric arc furnace, which consists of a diameter larger upper vessel and a connectable, smaller in diameter, the There is a lining in the lower vessel, the wall of the upper vessel cooled, partially cooled and / or uncooled.
  • the difference in diameter of the larger upper vessel compared to the smaller one In the event of a leak, the lower vessel prevents the cooling water from escaping penetrates behind the lining of the lower vessel.
  • the wall of the upper vessel from pipes through which cooling water flows is fitted with slag holders, the one Form a protective layer of slag against the arc radiation.
  • This slag can, if only formed or present in a thin layer is to melt again so that the pipes or an uncooled wall of the Upper vessel still exposed to the adverse radiation from the arc furnace and damage cannot be ruled out.
  • Such pipes or coils through which cooling water flows are known (DE 27 45 622 C2).
  • the tubes are called cooling tube coils that are exposed on both sides, attached to a support wall designed as a sheet metal jacket or skeleton.
  • a support wall designed as a sheet metal jacket or skeleton.
  • the invention has for its object in phases of melting with high Heat load to better protect the wall of the upper vessel.
  • the object is achieved according to the invention in that the diameter of the upper vessel at the entrance of the lower vessel enlarged by an annular platform is on which a lining ring is arranged, which at least the wall part of their inward surface against arcing covers. This takes the load on the wall of the upper vessel the arc radiation significantly. During operation of the furnace, Wall and / or a thicker, protective slag layer on the coils. This can also significantly reduce water cooling. Moreover electrical flashovers are avoided.
  • One embodiment provides that the lining ring with its cover is opposite the arc radiation from the wall with cooling water flowing through it Pipes extend to the permanent lining of the lower vessel.
  • the lining ring be in front can be filled after the first start-up.
  • Another advantage is that in the start-up state the upper vessel is completely covered with a Lining layer is covered.
  • Supporting the lining and protecting the walls of the lower vessel are also achieved in that the lining ring to below the top edge of the permanent lining of the lower vessel is sufficient.
  • the lower vessel is partially from outside and protected against thermal stress on the non-cooled wall.
  • the load of the lining ring and slag to be added is absorbed in such a way that the annular platform is supported on the outer jacket of the lower vessel is.
  • FIG. 2 which shows the known design, there is only a larger one in diameter Upper vessel 1 with a wall 1 a formed from cooling water tubes 4 Upper vessel 1 can be seen.
  • the cooling water pipes 4 are therefore the full effect of heat exposed by the heat in the furnace chamber 8 and there are no special ones Measures to protect the cooling water pipes 4 themselves.
  • the lower vessel 2 has a customary lining 3, the consists of a wear lining and a permanent lining 9.
  • a customary lining 3 the consists of a wear lining and a permanent lining 9.
  • an annular platform 5 is attached, the one Forms support surface 6 for a lining ring 7.
  • the thickness 7a of the lining ring 7 is matched to the increase in diameter of the upper vessel 1, so that, as shown, the lining ring 7 on the upper edge 10 of the permanent lining 9 ends and the permanent food 9 still encloses.
  • the lining ring 7 is appropriate before the first start-up filled.
  • the upper vessel 1 In the start-up state, the upper vessel 1 can be directed inward Wall 1a can be completely covered with a brick layer.
  • the lining ring 7 forms in the start-up state (FIG. 3) Top 7b an inwardly directed, conical surface 7c.
  • the Oven chamber 8 facing oblique conical surface 7c now takes place during operation gradually a natural slag build-up 7d (FIG. 1) takes place, the the still uncovered surface of the wall 1 a or the cooling water pipes 4th also covered and protects against the arc rays. So that during the company a natural protection for the still uncovered wall 1a and / or the cooling water pipes 4 created.
  • the lining ring 7 protects the uncooled part of the wall of the lower vessel 2 in that it extends below the upper edge 10 of the permanent lining 9 of the lower vessel 2 is enough.
  • the weight of the lining ring 7 and the deposited Slag 7d, which can act on the annular platform 5, on the outer casing 12 of the lower vessel 2 are intercepted.
  • a furnace cover 13 which is formed in a similar structure with cooling water pipes 4, closes the upper vessel 1 from the top.
  • the diameter of the furnace cover 13 can to the diameter of the natural Slag structure 7d can be adjusted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Discharge Heating (AREA)
EP02019320A 2001-09-26 2002-08-29 Four à arc Expired - Lifetime EP1298400B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10147552 2001-09-26
DE10147552A DE10147552A1 (de) 2001-09-26 2001-09-26 Elektrolichtbogenofen

Publications (2)

Publication Number Publication Date
EP1298400A1 true EP1298400A1 (fr) 2003-04-02
EP1298400B1 EP1298400B1 (fr) 2006-10-25

Family

ID=7700418

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02019320A Expired - Lifetime EP1298400B1 (fr) 2001-09-26 2002-08-29 Four à arc

Country Status (4)

Country Link
EP (1) EP1298400B1 (fr)
AT (1) ATE343772T1 (fr)
DE (2) DE10147552A1 (fr)
ES (1) ES2272623T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007035622B4 (de) * 2007-07-30 2013-08-08 Siemens Aktiengesellschaft Deckel für einen Ofen zur Aufnahme von Schmelzgut, insbesondere Metall, und Ofen zur Aufnahme von Schmelzgut

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4563766A (en) * 1978-10-07 1986-01-07 Benteler-Werke Ag Electric arc furnace for melting metal, especially steel
WO1993005626A1 (fr) * 1991-09-12 1993-03-18 Kortec Ag Four a courant continu pourvu d'une electrode de creuset, electrode de creuset et bloc electrode, et procede d'exploitation d'un tel four

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4563766A (en) * 1978-10-07 1986-01-07 Benteler-Werke Ag Electric arc furnace for melting metal, especially steel
WO1993005626A1 (fr) * 1991-09-12 1993-03-18 Kortec Ag Four a courant continu pourvu d'une electrode de creuset, electrode de creuset et bloc electrode, et procede d'exploitation d'un tel four

Also Published As

Publication number Publication date
ES2272623T3 (es) 2007-05-01
ATE343772T1 (de) 2006-11-15
DE50208529D1 (de) 2006-12-07
EP1298400B1 (fr) 2006-10-25
DE10147552A1 (de) 2003-04-10

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