EP0392068A1 - Four à induction à vide - Google Patents

Four à induction à vide Download PDF

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Publication number
EP0392068A1
EP0392068A1 EP89106750A EP89106750A EP0392068A1 EP 0392068 A1 EP0392068 A1 EP 0392068A1 EP 89106750 A EP89106750 A EP 89106750A EP 89106750 A EP89106750 A EP 89106750A EP 0392068 A1 EP0392068 A1 EP 0392068A1
Authority
EP
European Patent Office
Prior art keywords
crucible
vacuum induction
inductor
induction furnace
furnace 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.)
Withdrawn
Application number
EP89106750A
Other languages
German (de)
English (en)
Inventor
Sergei Leonidovich Sheffer
Alexandr Pavlovich Gubchenko
Ivan Iliich Glebov
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 EP89106750A priority Critical patent/EP0392068A1/fr
Publication of EP0392068A1 publication Critical patent/EP0392068A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H05B6/24—Crucible furnaces
    • 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
    • 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
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D21/02—Observation or illuminating devices
    • 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
    • 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
    • F27D2099/0015—Induction heating
    • F27D2099/0018—Relative movement of the coil and the charge during the heat treatment
    • 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
    • F27D25/00—Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag

Definitions

  • the invention relates to a vacuum induction furnace of the type specified in the preamble of claim 1.
  • a vacuum induction furnace of the type specified in the preamble of claim 1.
  • known vacuum induction furnaces for melting and remelting special steels and precision alloys the removal of a finished ingot from the vacuum chamber presents considerable difficulties and requires the furnace to be shut down.
  • a vacuum induction furnace is known from SU-A 1 032 868, the hollow cylindrical crucible of which is assembled from cooled wall segments which are electrically insulated from one another and enclosed in a jacket made of non-conductive material and is surrounded by an inductor. At the top of the crucible there is a sealed lid, on which devices for guiding and monitoring the melting process are arranged. At the lower end of the crucible, a lid is attached under it with a cooled metal team to hold the melt.
  • the melting performance of this vacuum induction furnace is relatively low because the molten metal remains in the crucible until it has completely crystallized, whereupon the furnace has to be opened and the crucible with the ingot has to be pulled out of the chamber. As a result, the replacement of a worn crucible takes a considerable amount of time.
  • the invention has for its object to reduce the time required to carry out the preparatory work associated with furnace operation between the metal melting processes and thus to increase the throughput of the vacuum induction furnace.
  • the vacuum induction furnace which is a crucible, the side surface of which is formed by electrically insulated from one another, enclosed in a jacket made of non-conductive material, cooled metal sections, an inductor enclosing the crucible, an upper cover with manufacturing devices arranged thereon for carrying out and monitoring the metal melting process and includes a lower lid connected to the crucible with a cooled metal team attached thereon, the crucible with the possibility of a reciprocating vertical movement with respect to the non-conductive material shell hermetically connected to the upper lid and jacket of the crucible housed inductor is arranged.
  • the vacuum induction furnace shown contains a crucible 1, the side walls of which are electrically insulated from one another, in a jacket 3 made of non-conductive material, for. B. is formed from a glass fiber composition, enclosed metallic, preferably copper segments 2 with cooling lines.
  • a lid 4 is arranged, on which a cooled metal combination 5 is fastened, which is hermetically connected to the jacket 3 of the crucible 1 by means of a seal 6.
  • an insertion cone 7 is formed in order to facilitate the introduction of the crucible 1 into the effective space of an inductor 8 with the aid of a mechanism 9 for a reciprocating vertical movement.
  • the inductor 8 is housed in a sleeve 10 made of non-conductive material, which has a radial flange 11 with a seal 12 for hermetically sealed connection to a has upper cover 13.
  • a sleeve seal or a packing gland is embedded, which is supported on a pressure ring 15.
  • connectors 16 for mounting devices for guiding and monitoring the melting process, for. B. a dosing device, thermocouples, crowbars for upsetting the load and for breaking bridges, observation devices.
  • the electrical heating elements of the inductor 10 are embedded in a hollow cylindrical extension on the base plate 11 of the upper cover 3, a support ring 15 for holding the ring seal 14 being arranged on the hollow cylindrical extension.
  • the height of the vertically movable crucible 1 is substantially greater than the height of the inductor 10.
  • the crucible which is designed as a double-walled nozzle, can be inserted with its upper conical end 7 into the hermetically sealed interior of the lid 3.
  • the work of the vacuum induction furnace is as follows:
  • a charge is inserted into the cooled metal crucible 1, after which it is inserted into the vacuum ring seal 14 by the mechanism 9 with its insertion cone 7.
  • the crucible 1 is brought into the upper end position and evacuated.
  • the heating and melting of the feed material is started.
  • the crucible 1 is melted tion left lowered.
  • the melt produced is refined and crystallized out when the inductor 8 is switched off and the crucible is cooled. If necessary, the ingot obtained is subjected to zone melting again by moving the crucible 1 with respect to the inductor 8 at a speed required by the technology.
  • the vacuum in the furnace is released without waiting for the ingot to solidify completely.
  • the crucible 1 is led out of the working space of the inductor 8 and pushed to the side.
  • a new crucible 1 is introduced, which has been prepared in advance for a subsequent melting process.
  • the ingot is pulled out of the first, and the crucible 1 with the team 5 is prepared for the next melting process.
  • the performance is significantly increased by using exchangeable crucibles 1, which reduces the production time between the melting processes.
  • the process for removing the finished ingot and cleaning the team 5 from the crusts and scrap residues is also considerably simplified.
  • the invention can be used for melting high-melting, chemically active metals in cooled metal crucibles and also for zone melting of metal bars for the purpose of cleaning them from non-metallic and gas inclusions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
EP89106750A 1989-04-14 1989-04-14 Four à induction à vide Withdrawn EP0392068A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP89106750A EP0392068A1 (fr) 1989-04-14 1989-04-14 Four à induction à vide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89106750A EP0392068A1 (fr) 1989-04-14 1989-04-14 Four à induction à vide

Publications (1)

Publication Number Publication Date
EP0392068A1 true EP0392068A1 (fr) 1990-10-17

Family

ID=8201241

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89106750A Withdrawn EP0392068A1 (fr) 1989-04-14 1989-04-14 Four à induction à vide

Country Status (1)

Country Link
EP (1) EP0392068A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2695197A1 (fr) * 1992-08-26 1994-03-04 Leybold Durferrit Gmbh Appareil de fusion par induction isolé vis-à-vis de l'atmosphère.
CN114857930A (zh) * 2022-06-27 2022-08-05 兴化市顺杰高温合金制品有限公司 一种高温合金熔炼用真空感应炉

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1042787B (de) * 1956-06-09 1958-11-06 Dr Habil Hugo Josef Seemann Vakuum-Induktionsschmelzofen
BE648889A (fr) * 1963-06-17 1964-10-01
GB979711A (en) * 1960-05-21 1965-01-06 Heraeus Gmbh W C Improvements in or relating to the induction melting of metals
US4202997A (en) * 1977-03-01 1980-05-13 Wooding Corporation Atmospheric control of flux pre-melting furnace
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 (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1042787B (de) * 1956-06-09 1958-11-06 Dr Habil Hugo Josef Seemann Vakuum-Induktionsschmelzofen
GB979711A (en) * 1960-05-21 1965-01-06 Heraeus Gmbh W C Improvements in or relating to the induction melting of metals
BE648889A (fr) * 1963-06-17 1964-10-01
US4202997A (en) * 1977-03-01 1980-05-13 Wooding Corporation Atmospheric control of flux pre-melting furnace
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
FR2695197A1 (fr) * 1992-08-26 1994-03-04 Leybold Durferrit Gmbh Appareil de fusion par induction isolé vis-à-vis de l'atmosphère.
CN114857930A (zh) * 2022-06-27 2022-08-05 兴化市顺杰高温合金制品有限公司 一种高温合金熔炼用真空感应炉

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