EP0200671A2 - Four, en particulier four de fusion ou de maintien de température pour des métaux - Google Patents

Four, en particulier four de fusion ou de maintien de température pour des métaux Download PDF

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Publication number
EP0200671A2
EP0200671A2 EP86730054A EP86730054A EP0200671A2 EP 0200671 A2 EP0200671 A2 EP 0200671A2 EP 86730054 A EP86730054 A EP 86730054A EP 86730054 A EP86730054 A EP 86730054A EP 0200671 A2 EP0200671 A2 EP 0200671A2
Authority
EP
European Patent Office
Prior art keywords
furnace
liquid metal
immersion
metal bath
metal
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.)
Withdrawn
Application number
EP86730054A
Other languages
German (de)
English (en)
Other versions
EP0200671A3 (fr
Inventor
Günther Schmidt
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.)
Strikfeld W and Koch GmbH
Original Assignee
Strikfeld W and Koch GmbH
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 Strikfeld W and Koch GmbH filed Critical Strikfeld W and Koch GmbH
Publication of EP0200671A2 publication Critical patent/EP0200671A2/fr
Publication of EP0200671A3 publication Critical patent/EP0200671A3/fr
Withdrawn legal-status Critical Current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
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0006—Electric heating elements or system
    • 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
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details specially adapted for crucible or pot furnaces
    • F27B14/14—Arrangements of heating devices
    • 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
    • F27B3/20—Arrangements of heating devices
    • 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
    • F27B14/00—Crucible or pot furnaces
    • F27B2014/002—Smelting process, e.g. sequences to melt a specific material
    • 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
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details specially adapted for crucible or pot furnaces
    • F27B2014/0875—Two zones or chambers, e.g. one used for charging
    • 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
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0006—Electric heating elements or system
    • F27D2099/0008—Resistor heating
    • F27D2099/0011—The resistor heats a radiant tube or surface
    • F27D2099/0013—The resistor heats a radiant tube or surface immersed in the charge

Definitions

  • the invention relates to a furnace, in particular a melting or holding furnace for metal. the preamble of the main claim.
  • Such furnaces are used in foundries and serve as storage furnaces or as heat-holding ladle furnaces for metal alloys at the casting station. They are loaded with the desired liquid metal alloy from a central premelting station or with the melting material via a loading device. These furnaces are kept at a certain temperature by resistance heating or also by oil or gas burners. It is also known to heat the furnace and thus the metal bath from the ceiling by heating the walls of the furnace vessel or by means of radiant heaters. For direct heating there are also immersion heaters that are inserted through the furnace wall into the interior of the furnace in the liquid metal area. In furnaces with such a heating there is the disadvantage that the immersion heaters are injured by the melting material or by the liquid material introduced. In addition, the side feed-through points have to be sealed against the liquid metal, and if they are arranged horizontally, the heating elements will wear out due to their own weight at high temperatures.
  • the invention is therefore based on the object of creating a furnace, in particular a melting or holding furnace with immersion heaters, in which the wear of the immersion heaters is reduced and the service life of the entire heating arrangement is thus increased.
  • the immersion heaters Due to the fact that the immersion heaters are inserted into the metal bath from above, the lead-through points lie above the liquid level, so that isolation and sealing of the lead-through points does not cause any problems.
  • the vertical position of the immersion heater reduces the wear caused by its own weight at high temperatures.
  • the heat transfer is improved by the exchange of the liquid material.
  • Additional protection for the immersion heater against damage caused by the melting material can be provided by providing protective tubes, e.g. made of ceramic, graphite, clay or coated steel or cast iron pipes.
  • the furnace 1 shown in Fig. 1 is designed as a holding furnace in which metal, e.g. Aluminum that has been melted elsewhere is introduced and the like for the purpose of further use, metering. is kept warm at a certain temperature or possibly further heated.
  • the furnace 1 has a furnace vessel 2 which is largely insulated from the outside, which is lined with ceramic and is covered with a lid 3.
  • the liquid metal bath 4 is filled with the molten metal via a filling opening 5, and the liquid metal is removed at a given time via the removal opening 6.
  • Immersion heaters 7 are guided through the cover 3 and preferably dip vertically into the metal bath 4.
  • the immersion heaters 7 are designed as resistance heaters, but they can also be designed as gas or oil heaters.
  • immersion walls 8 are let into the metal bath 4 from above, which largely cover the immersion heaters 7.
  • the baffles 8 can be attached to the lid 3.
  • the immersion depth of the baffles 7 is dimensioned such that a sufficiently large opening for the flow of the liquid metal remains between its lower edge and the bottom of the furnace vessel 2.
  • FIG. 2 shows an exemplary embodiment of a melting furnace 10, in which the furnace vessel 12 is filled with the melting material 19 via a loading device 11.
  • the immersion heater 17 is in turn passed through the cover 13 and projects vertically into the liquid metal bath 14.
  • the partition wall 18 divides the metal bath 14 into a heating chamber 15 and a melting chamber 16 and covers the immersion heater against the coarse-grained melting material 19 that has been filled in.
  • the liquid metal is removed via a tap valve 20.
  • the metal can also be taken in by scooping or by a pump.
  • the baffles 8, 18 end at a sufficient distance from the bottom of the vessel 2, 12 in order to ensure a sufficient exchange of the liquid metal.
  • This exchange and thus also the heat transfer can also take place via openings in the baffle 8, 18, these openings being arranged locally, for example in the vicinity of the bottom of the container 2, 12, but they can also be located on the entire surface of the partition 8 , 18 may be distributed, these openings then being adapted to the size of the melting material 19, so that the melting material 19 cannot slip through the holes.
  • the immersion heaters 7, 17, can be coated with appropriately designed protective tubes, for example made of ceramic, graphite, clay or similar substances, whereby coated steel or cast iron tubes can also be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
EP86730054A 1985-04-04 1986-03-25 Four, en particulier four de fusion ou de maintien de température pour des métaux Withdrawn EP0200671A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3512868 1985-04-04
DE19853512868 DE3512868A1 (de) 1985-04-04 1985-04-04 Ofen, insbesondere schmelz- oder warmhalteofen fuer metall

Publications (2)

Publication Number Publication Date
EP0200671A2 true EP0200671A2 (fr) 1986-11-05
EP0200671A3 EP0200671A3 (fr) 1987-06-10

Family

ID=6267643

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86730054A Withdrawn EP0200671A3 (fr) 1985-04-04 1986-03-25 Four, en particulier four de fusion ou de maintien de température pour des métaux

Country Status (2)

Country Link
EP (1) EP0200671A3 (fr)
DE (1) DE3512868A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2647886A1 (fr) * 1989-06-06 1990-12-07 Jafs Export Oy Holimesy Ab Four de fonderie
GB2232751A (en) * 1989-06-06 1990-12-19 Christopher J English Apparatus and method for treating molten material
WO1995013402A1 (fr) * 1993-11-12 1995-05-18 Pechiney Rhenalu Poche de traitement de metal liquide de faible encombrement
DE4039801C2 (de) * 1990-01-25 2000-03-16 Abb Kk Beeinflussung der Abgasströmung in einem Schmelzofen
CN105466215A (zh) * 2015-12-25 2016-04-06 重庆唐森机械制造有限公司 一种节能锅生产用加热炉

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2650380A1 (fr) * 1989-07-28 1991-02-01 Air Liquide Procede de chauffage d'un bain metallique
US5948352A (en) * 1996-12-05 1999-09-07 General Motors Corporation Two-chamber furnace for countergravity casting

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE645671C (de) * 1934-04-17 1937-06-01 Siegfried Junghans Elektrischer Ofen zum Schmelzen von Metallen
FR870310A (fr) * 1940-03-01 1942-03-09 Licentia Gmbh Four électrique à bain de sels fusibles, à électrodes
US3996412A (en) * 1975-01-17 1976-12-07 Frank W. Schaefer, Inc. Aluminum melting furnace
GB1561786A (en) * 1976-12-09 1980-03-05 Ass Eng Ltd Heating vessles for molten metal
FR2480419A1 (fr) * 1980-04-09 1981-10-16 Mgr Sa Fours Installation et procede pour fondre ou pour maintenir en fusion une matiere metallique par element resistant immerge dans le metal

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2647886A1 (fr) * 1989-06-06 1990-12-07 Jafs Export Oy Holimesy Ab Four de fonderie
GB2232752A (en) * 1989-06-06 1990-12-19 Jafs Export Oy Holimesy Ab Metalmelting furnace
GB2232751A (en) * 1989-06-06 1990-12-19 Christopher J English Apparatus and method for treating molten material
US5164146A (en) * 1989-06-06 1992-11-17 Ab Jafs Export Oy Holimesy Foundry furnace having outlet flow passage
GB2232752B (en) * 1989-06-06 1993-05-12 Jafs Export Oy Holimesy Ab Foundry furnace
DE4039801C2 (de) * 1990-01-25 2000-03-16 Abb Kk Beeinflussung der Abgasströmung in einem Schmelzofen
WO1995013402A1 (fr) * 1993-11-12 1995-05-18 Pechiney Rhenalu Poche de traitement de metal liquide de faible encombrement
FR2712217A1 (fr) * 1993-11-12 1995-05-19 Pechiney Rhenalu Poche de traitement de métal liquide de faible encombrement et de performances améliorées.
US5494265A (en) * 1993-11-12 1996-02-27 Pechiney Rhenalu Ladle for processing molten metal with minimal space requirements and improved performance
CN105466215A (zh) * 2015-12-25 2016-04-06 重庆唐森机械制造有限公司 一种节能锅生产用加热炉
CN105466215B (zh) * 2015-12-25 2017-08-11 重庆唐森机械制造有限公司 一种节能锅生产用加热炉

Also Published As

Publication number Publication date
DE3512868A1 (de) 1986-10-09
EP0200671A3 (fr) 1987-06-10

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Inventor name: SCHMIDT, GUENTHER