EP0410026A1 - Four à induction - Google Patents

Four à induction Download PDF

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Publication number
EP0410026A1
EP0410026A1 EP89113611A EP89113611A EP0410026A1 EP 0410026 A1 EP0410026 A1 EP 0410026A1 EP 89113611 A EP89113611 A EP 89113611A EP 89113611 A EP89113611 A EP 89113611A EP 0410026 A1 EP0410026 A1 EP 0410026A1
Authority
EP
European Patent Office
Prior art keywords
crucible
sections
projection
melting furnace
induction melting
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.)
Ceased
Application number
EP89113611A
Other languages
German (de)
English (en)
Inventor
Nikolai Matveevich Slotintsev
Evgeny Isaevich Rytvin
Semen Lvovich Roginsky
Oleg Petrovich Shiman
Nikolai Nikolaevich Trofimov
Viktor Alexandrovich Pershin
Alexandr Pavlovich Gubchenko
Sergei Leonidovich Sheffer
Igor Valentinovich Kuzovlev
Vladimir Lvovich Dreitser
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.)
VSESOJUZNY NAUCHNO-ISSLEDOVATELSKY PROEKTNO-KONSTRUKTORSKY I TEKHNOLOGICHESKY INST ELEKTROTERMICHESKOGO OBORUDOVANIA VNIIETO
Original Assignee
VSESOJUZNY NAUCHNO-ISSLEDOVATELSKY PROEKTNO-KONSTRUKTORSKY I TEKHNOLOGICHESKY INST ELEKTROTERMICHESKOGO OBORUDOVANIA VNIIETO
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 VSESOJUZNY NAUCHNO-ISSLEDOVATELSKY PROEKTNO-KONSTRUKTORSKY I TEKHNOLOGICHESKY INST ELEKTROTERMICHESKOGO OBORUDOVANIA VNIIETO filed Critical VSESOJUZNY NAUCHNO-ISSLEDOVATELSKY PROEKTNO-KONSTRUKTORSKY I TEKHNOLOGICHESKY INST ELEKTROTERMICHESKOGO OBORUDOVANIA VNIIETO
Priority to EP89113611A priority Critical patent/EP0410026A1/fr
Publication of EP0410026A1 publication Critical patent/EP0410026A1/fr
Ceased 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
    • F27B14/00—Crucible or pot furnaces
    • F27B14/04—Crucible or pot furnaces adapted for treating the charge in vacuum or special atmosphere
    • 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
    • F27B14/06—Crucible or pot furnaces heated electrically, e.g. induction crucible furnaces with or without any other source of heat
    • F27B14/061—Induction furnaces
    • F27B14/063—Skull melting type
    • 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
    • F27D11/00—Arrangement of elements for electric heating in or on furnaces
    • F27D11/12—Arrangement of elements for electric heating in or on furnaces with electromagnetic fields acting directly on the material being heated
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/22—Furnaces without an endless core
    • 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
    • F27B2014/008—Continuous casting

Definitions

  • the invention relates to metal melting furnaces and relates in particular to an induction melting furnace and its use.
  • An induction melting furnace (JV Petrov, EG Ratnikov “Kholodnye tigli”("ColdCrucible"), 1972, Energiya Publishing House (Moscow), p. 52) is known, which contains a crucible enclosed by an inductor, the side wall of which is arranged by vertically arranged Sections are formed with cooling channels. The sections are intimately connected to one another with the aid of insulating material intermediate layers. A cooled metal combination is used to hold the molten metal in the crucible.
  • the known induction melting furnace can only be used for melting high-melting metals at working temperatures of approx. 2000 ° K. It has insufficient operational reliability at higher temperatures. This is due to the fact that the insulating material intermediate layers mounted between the sections do not withstand and fail at the high temperatures heat loads which arise from the action of a heat radiation conducted through them of the metal melt filling the crucible. This leads to burnout and insulation damage to the inductor or to the failure of the latter. In addition, during the process of manufacturing and assembling the crucible and in furnace operation, gaps are formed between the sections of the crucible, through which the heat radiation of the molten metal spreads, which acts on the structural components which are located outside the crucible and are subjected to considerable thermal loads that can lead to an emergency.
  • the invention has for its object to provide an induction melting furnace with such a structural design of the sections of the crucible and such an arrangement of the intermediate insulating layers between them, which make it possible to prevent the action of heat radiation from the molten metal on the components of the furnace, which are outside the crucible lie.
  • the object of the invention is an induction melting furnace which comprises a crucible, the side wall of which is arranged by vertically arranged and intimately connected sec tions with cooling channels is formed, an inductor enclosing the crucible and a cooled metal team for holding a molten metal in the crucible, with the characteristic that at the locations of the arrangement of the insulating material intermediate layers on one of the side surfaces of each section a projection and on the other side surface a recess whose configuration corresponds to the configuration of the surface of the protrusion of the adjacent section to be coupled thereto are formed on the inner surface of the crucible side wall.
  • the present invention provides reliable protection for the components of the furnace, which are located outside the crucible, especially for the inductor, against heat radiation from the molten metal, which allows the temperature in the crucible to be raised to 3000 ° K.
  • the induction melting furnace according to the invention contains an inductor 1 (FIG. 1), which encloses a crucible 2, and a cooled metal team 3.
  • the side wall of the crucible 2 is in front by vertically arranged metal sections 4 preferably made of copper, with cooling channels 5, which are connected by means of connecting piece 6 to a (not shown) coolant delivery system.
  • each section 4 On one of the side surfaces of each section 4 (Fig. 2) is a projection 7 and on the other is a recess 8, the configuration of which corresponds to the configuration of the surface of the projection 7 of the adjacent section 4 to be coupled thereto, adjacent to the inner surface of the crucible side wall educated.
  • insulating material In each gap between the projection 7 and the recess 8 4 insulating material intermediate layers 9 are arranged over the total height of the sections.
  • the height of the projections 7 and the depth of the recesses 8 depend on the geometric dimensions of the crucible 2, the flowability of the molten metal and its temperature.
  • the sections 4 can be designed in such a way that the column at the junction of the sections 4, d. H.
  • the cooled team 3 preferably made of copper, is intended for holding a molten metal 11 in the crucible 2.
  • the induction melting furnace works as follows. A batch to be melted is placed on the trailer 3 to be cooled. The inductor 1 is actuated. As the batch heats up, a molten metal 11 forms, which takes the form of a convex meniscus, the height of which depends on the density of the remelt Metal and depends on the strength of the electromagnetic field generated by the inductor 1. The projections 7 and the recesses 8 with the insulating material intermediate layers 9 create an obstacle on the way of heat radiation from the molten metal 11, which is completely absorbed by uninsulated sections of the cooled sections 4.
  • the present invention thus makes it possible to reliably protect the inductor 1 located outside the crucible 2 against the thermal effect of the melt 11, as a result of which the operating life of the furnace is extended many times over.
  • the present invention can be applied in induction furnaces for melting high-melting metals with a cooled metal crucible.
  • the invention can also be used in vacuum induction furnaces for high-temperature treatment of graphite products in the production of composite materials at temperatures of approximately 3000 ° K.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
EP89113611A 1989-07-24 1989-07-24 Four à induction Ceased EP0410026A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP89113611A EP0410026A1 (fr) 1989-07-24 1989-07-24 Four à induction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89113611A EP0410026A1 (fr) 1989-07-24 1989-07-24 Four à induction

Publications (1)

Publication Number Publication Date
EP0410026A1 true EP0410026A1 (fr) 1991-01-30

Family

ID=8201678

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89113611A Ceased EP0410026A1 (fr) 1989-07-24 1989-07-24 Four à induction

Country Status (1)

Country Link
EP (1) EP0410026A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0743806A2 (fr) * 1995-05-19 1996-11-20 Daido Tokushuko Kabushiki Kaisha Creusets de fusion à lévitation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE697555C (de) * 1936-05-27 1940-10-17 Heraeus Vacuumschmelze Akt Ges Hochfrequenz-Induktionsofen
DE1283982B (de) * 1966-07-29 1968-11-28 Zd Y Elektrotepelnych Zarizeni Induktionsofen fuer elektrische Induktionserwaermung
EP0276544A1 (fr) * 1986-12-04 1988-08-03 The Duriron Company, Inc. Procédé de fusion par induction de métaux et d'alliages réactifs

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE697555C (de) * 1936-05-27 1940-10-17 Heraeus Vacuumschmelze Akt Ges Hochfrequenz-Induktionsofen
DE1283982B (de) * 1966-07-29 1968-11-28 Zd Y Elektrotepelnych Zarizeni Induktionsofen fuer elektrische Induktionserwaermung
EP0276544A1 (fr) * 1986-12-04 1988-08-03 The Duriron Company, Inc. Procédé de fusion par induction de métaux et d'alliages réactifs

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0743806A2 (fr) * 1995-05-19 1996-11-20 Daido Tokushuko Kabushiki Kaisha Creusets de fusion à lévitation
EP0743806A3 (fr) * 1995-05-19 1996-12-18 Daido Steel Co Ltd

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