EP0102479A2 - Réchauffeur à écoulement continu pour métaux en fusion - Google Patents

Réchauffeur à écoulement continu pour métaux en fusion Download PDF

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Publication number
EP0102479A2
EP0102479A2 EP83106697A EP83106697A EP0102479A2 EP 0102479 A2 EP0102479 A2 EP 0102479A2 EP 83106697 A EP83106697 A EP 83106697A EP 83106697 A EP83106697 A EP 83106697A EP 0102479 A2 EP0102479 A2 EP 0102479A2
Authority
EP
European Patent Office
Prior art keywords
crucible
furnace
induction
melt
inlet
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Withdrawn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
EP83106697A
Other languages
German (de)
English (en)
Other versions
EP0102479A3 (en
Inventor
Fritz Dipl.-Ing. Hegewaldt
Erwin Dr. Dipl.-Ing. Dötsch
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.)
BBC Brown Boveri AG Germany
Original Assignee
Brown Boveri und Cie AG Germany
BBC Brown Boveri AG Germany
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 Brown Boveri und Cie AG Germany, BBC Brown Boveri AG Germany filed Critical Brown Boveri und Cie AG Germany
Publication of EP0102479A2 publication Critical patent/EP0102479A2/fr
Publication of EP0102479A3 publication Critical patent/EP0102479A3/de
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a continuous flow heater for molten metal, e.g. an induction crucible furnace to maintain or increase the temperature level of a molten metal.
  • the induction channel furnace is ideal for continuous operation. Batch operation with the induction channel furnace, on the other hand, is difficult for larger units and outputs, since the associated temperature fluctuations, particularly in the refractory lining of the inductors, lead to considerable problems. Accordingly, changing alloys and quality requires considerable effort.
  • the induction crucible furnace has already been used for batch heating. Special designs of induction crucible furnaces have also been used for continuous heating.
  • a fireproof-lined pipe was fed through the tilting bearing of the induction crucible furnace and was intended to supply the melt to be heated. The discharge took place via an open snout or a siphon by tilting the induction crucible furnace.
  • the melt is supplied through a slot in the lid. In both embodiments, it was necessary to change the crucible at shorter intervals than with normal induction crucible furnaces. Significant signs of wear mostly occurred in the areas of the crucible wall.
  • the object of the invention is an induction crucible furnace to create, in which the life of the crucible corresponds approximately to the life of the crucible in a normal induction crucible furnace.
  • the feed of the melt to the crucible furnace is arranged below the bath level in the furnace.
  • One possibility for this is to provide the inlet in the bottom of the crucible.
  • the spout can be made through the snout, but it can also be provided in the bottom of the crucible.
  • Such an induction crucible furnace with an inlet and outlet in the bottom is particularly suitable if the treatment vessel is also to be placed under vacuum.
  • Fig. 1 shows an induction crucible furnace 1 with a cylindrical crucible 2, which is provided with an inlet 3 for the melt and a pouring spout 4.
  • the crucible 2 is filled with melt 5 up to the bath level 6.
  • the crucible 2 stands on a refractory base 7, which is supported on a metallic base plate 8.
  • the metallic base plate 8 forms with a lower reinforcing ring 9, vertical struts 10 and an upper reinforcing ring 11 the furnace frame.
  • the reinforcing ring 11 is shaped in the area of the pouring spout 4 so that the pouring spout 4 can be supported on it.
  • the crucible 2 is surrounded by a coil insert 12 and 13. Magnetic yokes 18 ensure the magnetic reflux of the lines of force generated in the active coil.
  • clamping devices are arranged, which consist of a lever 19, a threaded spindle 20 and a compression spring 21. With the help of this clamping device, the coils 12 and 13 are pressed against the reinforcing ring 11.
  • the bath movement generated by the induction is represented by the lines 22.
  • the inlet opening 3 is connected to the connecting pipe 23, which leads to the funnel 24, via flanges 25 or the like.
  • a fire-resistant lined pipeline was used for this.
  • This pipeline is also provided with thermal insulation 26 in order to avoid heat radiation to the outside or excessive cooling of the melt in the pipeline.
  • the static bath pressure in the furnace, which corresponds to the bath level 6, and in the feed line or the funnel 24 must be the same. It is therefore possible to influence the bath level 6 in the furnace via the bath level in the funnel 24.
  • FIG. 2 shows another embodiment of FIG. 1.
  • the outflow opening 30 is arranged here, like the inflow opening 3, in the bottom 27 of the crucible 2.
  • This outflow opening 30 is connected to the pouring spout 33 via a connecting line 31, which is connected to the outflow opening via flanges 32.
  • a fire-resistant lined pipeline is used is provided on the outside with thermal insulation 34.
  • the inlet opening 3 and the outlet opening 30 are close to one another, this does not interfere because the strong stirring effect of the induction current prevents the melt from being directly passed from the inlet to the outlet.
  • the corresponding bath movement is also indicated by the lines 22 in this figure.
  • the device at the end of the treatment, can be emptied by tilting or, if the induction crucible furnace is not designed to be tiltable, by means of a floor plug, not shown.
  • FIG 3 shows a further embodiment of the invention, in which the crucible 2 is provided with a lid 40 in a vacuum-tight manner and the atmosphere above the bath level 6 can be sucked off through the opening 41 by means of the vacuum pump 43.
  • the vacuum pump 43 is connected to the suction opening 41 via the connecting line 42 and the flanges 45.
  • At the outlet of the vacuum pump there is a line 44 through which the extracted gases can be discharged.
  • This embodiment also has the advantage that the inlet and outlet points 24 and 33 can be deeper than in the embodiment according to FIG. 2. This has the advantage that after treatment, ie after the vacuum has been removed, less residual melt in the treatment unit remains. In addition, of course, are the verb cable lines 46 and 47 shorter.
  • Fig. 4 shows an embodiment with a one-piece design of the inlet and outlet lines 48 and 49. These are arranged in the part 50, so that a component results.
  • This embodiment also has the advantage that the component 50 can be rotated about its vertical and the vertical axis 51 of the crucible furnace, so that the inlet opening 3 and the outlet opening 40 are closed. This component represents a slide.
  • the invention is not limited to the exemplary embodiments shown, in particular the inlet can also be designed differently.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
EP83106697A 1982-08-06 1983-07-08 Continuous-flow heater for molten metals Withdrawn EP0102479A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3229367 1982-08-06
DE19823229367 DE3229367A1 (de) 1982-08-06 1982-08-06 Durchlauferhitzer fuer schmelzfluessige metalle

Publications (2)

Publication Number Publication Date
EP0102479A2 true EP0102479A2 (fr) 1984-03-14
EP0102479A3 EP0102479A3 (en) 1984-09-05

Family

ID=6170276

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83106697A Withdrawn EP0102479A3 (en) 1982-08-06 1983-07-08 Continuous-flow heater for molten metals

Country Status (4)

Country Link
US (1) US4486889A (fr)
EP (1) EP0102479A3 (fr)
JP (1) JPS5944574A (fr)
DE (1) DE3229367A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0579769A (ja) * 1991-09-20 1993-03-30 Fuji Electric Co Ltd 押さえ蓋を備える高速溶解誘導炉
US6393044B1 (en) * 1999-11-12 2002-05-21 Inductotherm Corp. High efficiency induction melting system
US20050098294A1 (en) * 2003-11-12 2005-05-12 Howard Robert W. Casting device and method
US7413590B2 (en) * 2006-01-11 2008-08-19 Heritage Environmental Services, Llc Use of an induction furnace for the production of iron from ore
US20080130704A1 (en) * 2006-11-30 2008-06-05 Lapoint Albert E Electroslag smelting system and method
GB2586634B (en) * 2019-08-30 2022-04-20 Dyson Technology Ltd Multizone crucible apparatus

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1061003B (de) * 1958-04-12 1959-07-09 Otto Junker Fa Kernloser Induktions-Schmelzofen fuer Vakuumbetrieb
US3230073A (en) * 1962-07-20 1966-01-18 Asea Ab Process for vacuum degassing with electromagnetic stirring
US3380511A (en) * 1964-05-25 1968-04-30 Campbell James Samuel Apparatus for automatically filling a receptacle
US3320348A (en) * 1964-08-07 1967-05-16 V & V Companies Inc Induction melting furnace
US3700779A (en) * 1970-07-30 1972-10-24 Est Aciers Fins Method of treatment of liquid steel under vacuum
US3819842A (en) * 1972-04-24 1974-06-25 Elin Union Ag Method and furnace for maintaining the temperature level of metal melts

Also Published As

Publication number Publication date
US4486889A (en) 1984-12-04
JPS5944574A (ja) 1984-03-13
DE3229367A1 (de) 1984-02-09
EP0102479A3 (en) 1984-09-05

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Effective date: 19850507

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Inventor name: DOETSCH, ERWIN, DR., DIPL.-ING.

Inventor name: HEGEWALDT, FRITZ, DIPL.-ING.