EP0345541B1 - Verfahren zum Herstellen eines Kalt-Schmelz-Tiegels - Google Patents

Verfahren zum Herstellen eines Kalt-Schmelz-Tiegels Download PDF

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Publication number
EP0345541B1
EP0345541B1 EP19890109366 EP89109366A EP0345541B1 EP 0345541 B1 EP0345541 B1 EP 0345541B1 EP 19890109366 EP19890109366 EP 19890109366 EP 89109366 A EP89109366 A EP 89109366A EP 0345541 B1 EP0345541 B1 EP 0345541B1
Authority
EP
European Patent Office
Prior art keywords
crucible
base part
wall segments
cold
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.)
Expired - Lifetime
Application number
EP19890109366
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0345541A2 (de
EP0345541A3 (en
Inventor
Heinrich Gier
Manfred Beyss
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.)
Forschungszentrum Juelich GmbH
Original Assignee
Forschungszentrum Juelich 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 Forschungszentrum Juelich GmbH filed Critical Forschungszentrum Juelich GmbH
Publication of EP0345541A2 publication Critical patent/EP0345541A2/de
Publication of EP0345541A3 publication Critical patent/EP0345541A3/de
Application granted granted Critical
Publication of EP0345541B1 publication Critical patent/EP0345541B1/de
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
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details specially adapted for crucible or pot 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
    • F27B14/06—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
    • F27D9/00—Cooling of furnaces or of charges therein
    • 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
    • F27D2001/0046—Means to facilitate repair or replacement or prevent quick wearing

Definitions

  • the invention relates to a method for producing a cold-melting crucible for melting small amounts of metal in suspension, which consists of an upper crucible forming the crucible trough by appropriately shaped wall segments and a base part with the distribution lines for the cooling system cooling channels run through slots which are separated from one another and into which the supply lines for the coolant are introduced from below.
  • the invention further relates to a cold-melting crucible according to the preamble of claim 2.
  • Cold melting crucibles are used to produce very pure metal samples and are used in particular as melting furnaces for growing single crystals.
  • the low level of contamination of metals melted in cold-melting crucibles is due to the fact that, as a result of strong cooling of the crucible wall and by generating a magnetic field by means of high-frequency induction coils, the metal body, which was initially solid and then melted, is kept freely suspended in a stable position in the melting chamber (see DE -PS 5 18 499; laboratory Methods, 1963, pages 301 ff., Metals Research-Advance Information, HCC 50 Cold Crucible).
  • the aim is to divide the crucible wall into as many segments as possible.
  • a cold-melting crucible of this type is known from DE-OS 21 00 378.
  • the manufacturing process for this crucible is very complex because the crucible is made from a solid material by drilling and cutting the slots, usually by means of spark erosion.
  • a cold-melting crucible of the type mentioned is also known from DE-PS 27 17 459.
  • the production method for this crucible is that it is composed of annular metal disks with radial slots, the metal disks being soldered to one another and to a base plate for the cold-melting crucible. This method of production is also relatively complex.
  • the object of the invention is also a repair-friendly and user-friendly cold melting crucible.
  • the individual wall segments are produced from a solid material by means of quick and simple working processes, such as milling.
  • a larger starting workpiece for example a cylindrical solid material with a larger diameter, is assumed.
  • other manufacturing processes such as casting processes, can also be used.
  • the individual wall segments are connected by soldering to the discharge pipes for the coolant that protrude from the base part. Any necessary adjustment is easily possible by bending the cooling lines.
  • connection between the individual wall segment and the cooling line is expediently made by soft soldering. As a result, a single wall segment for repairing the crucible can be easily removed.
  • the crucible is easy and inexpensive to repair, since individual wall segments can be easily removed and replaced with new ones if necessary.
  • the compact design of the upper part enclosing the crucible trough enables a more effective coupling to the HF magnetic field than is the case with crucibles the known design initially mentioned is the case.
  • the magnetic field can be concentrated on the upper part, which leads to an energy gain of up to 30%.
  • the cold-melting crucible has an upper part, which consists of a multiplicity of wall segments 1, and a base part 2, which terminates at the bottom with a flange 3 and the supply and discharge lines for the coolant contains.
  • the base part also has a further flange 4 for receiving the pressure vessel - which is not shown in the drawing.
  • the wall segments which are separated from each other by a maximum gap of 0.5 mm, are shaped so that the melting chamber optimally matches the melting conditions is adjusted.
  • Cooling channels 7 run in the segments, which are guided along the inner surface of the melting chamber in such a way that sufficient cooling of the crucible-shaped crucible wall on the bottom is achieved.
  • the coolant lines 9 and 9a form the mechanical connection between the upper part consisting of the wall segments 1 and the base part 2. These are hard-soldered to the base part, but soft-soldered to the respective wall segment, so that the connection can be easily released in the event of a repair.
  • the coolant lines 9 are connected to the derivative 9 '.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
EP19890109366 1988-06-04 1989-05-24 Verfahren zum Herstellen eines Kalt-Schmelz-Tiegels Expired - Lifetime EP0345541B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3819153 1988-06-04
DE19883819153 DE3819153A1 (de) 1988-06-04 1988-06-04 Verfahren zum herstellen eines kalt-schmelz-tiegels

Publications (3)

Publication Number Publication Date
EP0345541A2 EP0345541A2 (de) 1989-12-13
EP0345541A3 EP0345541A3 (en) 1990-03-28
EP0345541B1 true EP0345541B1 (de) 1993-03-31

Family

ID=6355935

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890109366 Expired - Lifetime EP0345541B1 (de) 1988-06-04 1989-05-24 Verfahren zum Herstellen eines Kalt-Schmelz-Tiegels

Country Status (2)

Country Link
EP (1) EP0345541B1 (enrdf_load_stackoverflow)
DE (1) DE3819153A1 (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3940029C2 (de) * 1989-12-04 1994-04-14 Leybold Ag Tiegel für die induktive Erwärmung
DE4018925A1 (de) * 1990-06-13 1991-12-19 Leybold Ag Induktionsschmelzofen
DE4022561C1 (enrdf_load_stackoverflow) * 1990-07-16 1992-02-27 Forschungszentrum Juelich Gmbh, 5170 Juelich, De
DE4209964C2 (de) * 1992-03-27 2000-11-02 Ald Vacuum Techn Ag Vorrichtung für die Herstellung von Metallen und Metall-Legierungen hoher Reinheit
US5528620A (en) * 1993-10-06 1996-06-18 Fuji Electric Co., Ltd. Levitating and melting apparatus and method of operating the same
DE102005054319B4 (de) * 2005-11-11 2013-04-25 Schott Ag Modularer Skulltiegel, Begrenzungs- und Erweiterungselemente und Verfahren zum Schmelzen und/oder Läutern einer anorganischen Substanz, insbesondere von Glas
DE102008050855B4 (de) * 2008-10-08 2018-11-22 Uwe Geib Verfahren zum kontinuierlichen oder periodischen Austauschen von Baugruppen oder Einzelbauteilen eines Schmelzofens oder einer Förderstrecke sowie Schmelzofen oder Förderstrecke

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1186806A (en) * 1968-09-20 1970-04-08 Standard Telephones Cables Ltd Improvements in or relating to apparatus for the heat treatment of electrically conductive materials
GB1221909A (en) * 1969-10-01 1971-02-10 Standard Telephones Cables Ltd Improvements in or relating to apparatus for the heat treatment of electrically conductive materials
DE2717459C2 (de) * 1977-04-20 1982-07-29 Kernforschungsanlage Jülich GmbH, 5170 Jülich Verfahren zur Herstellung eines Kaltschmelztiegels
FR2595716B1 (fr) * 1986-03-13 1992-07-10 Technogenia Sa Procede et dispositif pour l'elaboration de materiaux refractaires par induction
US4738713A (en) * 1986-12-04 1988-04-19 The Duriron Company, Inc. Method for induction melting reactive metals and alloys

Also Published As

Publication number Publication date
DE3819153C2 (enrdf_load_stackoverflow) 1991-11-14
EP0345541A2 (de) 1989-12-13
EP0345541A3 (en) 1990-03-28
DE3819153A1 (de) 1989-12-07

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