EP0803304A2 - Creuset de maintien à préchambre en graphite ou métal - Google Patents

Creuset de maintien à préchambre en graphite ou métal Download PDF

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Publication number
EP0803304A2
EP0803304A2 EP97100045A EP97100045A EP0803304A2 EP 0803304 A2 EP0803304 A2 EP 0803304A2 EP 97100045 A EP97100045 A EP 97100045A EP 97100045 A EP97100045 A EP 97100045A EP 0803304 A2 EP0803304 A2 EP 0803304A2
Authority
EP
European Patent Office
Prior art keywords
crucible
holding
metal
antechamber
graphite
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Withdrawn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
EP97100045A
Other languages
German (de)
English (en)
Other versions
EP0803304A3 (fr
Inventor
Willi Eigemeier
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.)
Femuk Betriebsberatung GmbH
Original Assignee
Femuk Betriebsberatung 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 Femuk Betriebsberatung GmbH filed Critical Femuk Betriebsberatung GmbH
Publication of EP0803304A2 publication Critical patent/EP0803304A2/fr
Publication of EP0803304A3 publication Critical patent/EP0803304A3/fr
Withdrawn legal-status Critical Current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
    • F27B14/10—Crucibles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/04—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like tiltable
    • B22D41/05—Tea-pot spout ladles

Definitions

  • the invention relates to a holding crucible with a prechamber made of graphite or metal for molten metals with holding temperature fittings between 700 o C and 1000 o C.
  • metals or metal alloys are premelted at the temperatures mentioned - generally aluminum alloys - in so-called premelting furnaces and heated to the desired temperature.
  • Such premelting furnaces are mainly heated with oil or gas. If there is a greater need for liquid aluminum alloys, induction furnaces are used. Aluminum alloys require special maintenance.
  • the hydrogen bubbles can make themselves unpleasantly noticeable as the smallest voids.
  • the further sensitivity is the strong affinity of aluminum or aluminum alloys for oxygen.
  • Aluminum and its alloys oxidize very easily and on every occasion, especially where oxygen or oxygen compounds are nearby.
  • Aluminum oxides are formed. This fault formation is particularly pronounced in liquid aluminum alloys. The oxides then appear as oxide skins and float in the melt in order to then deposit on the grain boundaries when the castings solidify later.
  • melts can be cleaned relatively easily, both from the hydrogen and from the oxides.
  • the most intensive, fastest and most complete cleaning of the melt is carried out by blowing chlorine gas into the melt.
  • this method has the disadvantage of being extremely polluting, so that it is only used in the toughest cases. Otherwise, cleaning salts are used to clean the melt, but they also release small amounts of chlorine gas for more intensive cleaning.
  • the melt in the premelting furnace can be cleaned relatively well, even with chlorine gas, since nobody works on a premelting furnace as a caster. Suitable protective measures can easily be taken.
  • the object of the invention is now to significantly reduce oxide formation when transferring the premelt into the crucible of the holding furnaces.
  • the crucibles are almost the same in shape for both holding furnaces and premelting furnaces, but differ in capacity.
  • the crucibles have a circular, elongated shape and are at least domed in the base area.
  • the holding crucible (1) Fig.1 inform of a graphite crucible has a uniform course in the upper region with respect to the end of the wall thickness.
  • a holding crucible made of metal (1.1) Fig. 3,4 is usually made of cast iron or cast iron - in exceptional cases also as cast steel.
  • FIGS. 3 and 4 Another solution is shown graphically in FIGS. 3 and 4.
  • the crucible wall (2.1) Fig. 3, 4 is left free at any circumferential point on the long side up to a certain length, in the width corresponding to the interior space dimension (5), Fig. 3 of the pre-chamber (4.1), A connecting separator (7) Fig. 5,6,8 is later inserted into this clearance (6) Fig. 7.
  • the crucible wall (2.1) Fig.3 has reinforcements (9) Fig.3,4 in the area of the molded pre-chamber (3.1), in which longitudinal grooves (10) Fig.3.4 are provided, in which the longitudinal ribs (11) Fig.5.8 of the connecting separating piece (7) engage in a holding manner.
  • the length (L) Fig. 8 of the connecting: separating piece (7) Fig. 8 is dimensioned such that after the connecting separating piece (7) has been fully inserted into the recess (6) Fig. 7, a connecting opening (8.1) Fig. 4, 6 between the crucible interior (12) Fig. 3.5 and the pre-chamber interior (13) Fig. 3.5 remains.
  • the upper edge of the crucible is provided with a circumferential crucible edge (14) Fig. 3, 4, 5, 7 to reinforce and prevent the risk of breakage.
  • the crucible rim (14) has one in the area of the antechamber inclined abbreviation (15) Fig. 3, 4, 5, 6, 7 to shield liquid metal to be introduced.
  • graphite crucibles In graphite crucibles, graphite conducts heat well, but metal transfers heat even better. In the case of graphite crucibles, the thermal conductivity drops relatively quickly, since graphite crucibles become refractory over time. A graphite crucible must therefore be replaced after about 6 to 8 weeks for cost reasons.
  • a metal crucible loses the thermal conductivity insignificantly, and the durability and usability can be 1 to 2 years. These circumstances clearly speak for the use of metal crucibles.
  • aluminum and aluminum alloys have the property of dissolving iron. Iron is then found in the mixed crystals and becomes very brittle from a certain percentage of aluminum alloys.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Carbon And Carbon Compounds (AREA)
EP97100045A 1996-01-03 1997-01-03 Creuset de maintien à préchambre en graphite ou métal Withdrawn EP0803304A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29600045U DE29600045U1 (de) 1996-01-03 1996-01-03 Warmhaltetiegel mit Vorkammer aus Graphit oder Metall
DE9600045U 1996-01-03

Publications (2)

Publication Number Publication Date
EP0803304A2 true EP0803304A2 (fr) 1997-10-29
EP0803304A3 EP0803304A3 (fr) 1999-06-16

Family

ID=8017642

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97100045A Withdrawn EP0803304A3 (fr) 1996-01-03 1997-01-03 Creuset de maintien à préchambre en graphite ou métal

Country Status (2)

Country Link
EP (1) EP0803304A3 (fr)
DE (1) DE29600045U1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005095027A1 (fr) * 2004-04-01 2005-10-13 Outokumpu Technology Oyj Bac de coulee et procede de coulee d'anodes en cuivre
CN100381228C (zh) * 2005-03-17 2008-04-16 日矿金属株式会社 阳极铸造用计量锅

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19831296C2 (de) * 1998-07-13 2002-05-16 Vesuvius Becker & Piscantor Gr Warmhaltetiegel

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE30339C (de) * L. DILL in Frankfurt a. M Pfanne für schlackenfreien Gufs
DE428653C (de) * 1925-02-08 1926-05-08 Hugo Wachenfeld Hilfsvorrichtung fuer Giesspfannen
GB578977A (en) * 1944-06-23 1946-07-18 Stone J & Co Ltd Improvements in the treatment of magnesium base alloys and the production of pressure die-castings therefrom
GB618563A (en) * 1946-11-04 1949-02-23 Stone Fry Magnesium Ltd Improvements relating to the production of pressure die castings from magnesium basealloys
US2621916A (en) * 1949-12-19 1952-12-16 William L Wilbert Crucible or melting pot
DE1907107U (de) * 1964-08-14 1964-12-23 Bbc Brown Boveri & Cie Kippbarer induktionstiegelofen.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005095027A1 (fr) * 2004-04-01 2005-10-13 Outokumpu Technology Oyj Bac de coulee et procede de coulee d'anodes en cuivre
EA008872B1 (ru) * 2004-04-01 2007-08-31 Отокумпу Текнолоджи Оюй Литейный желоб и способ литья медных анодов
CN100553824C (zh) * 2004-04-01 2009-10-28 奥图泰有限公司 浇注槽、出口砖和铸造铜阳极用的方法
CN100381228C (zh) * 2005-03-17 2008-04-16 日矿金属株式会社 阳极铸造用计量锅

Also Published As

Publication number Publication date
DE29600045U1 (de) 1996-02-29
EP0803304A3 (fr) 1999-06-16

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