EP2164655A2 - Procédé de fusion et de maintien à température de métal fondu, et four de fusion et de maintien à température de métal fondu - Google Patents

Procédé de fusion et de maintien à température de métal fondu, et four de fusion et de maintien à température de métal fondu

Info

Publication number
EP2164655A2
EP2164655A2 EP07815116A EP07815116A EP2164655A2 EP 2164655 A2 EP2164655 A2 EP 2164655A2 EP 07815116 A EP07815116 A EP 07815116A EP 07815116 A EP07815116 A EP 07815116A EP 2164655 A2 EP2164655 A2 EP 2164655A2
Authority
EP
European Patent Office
Prior art keywords
melting
chamber
melt
holding
holding furnace
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Withdrawn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
EP07815116A
Other languages
German (de)
English (en)
Inventor
Manuela Wagner
Marc Wagner
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.)
C3 Casting Competence Center GmbH
Original Assignee
C3 Casting Competence Center 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 C3 Casting Competence Center GmbH filed Critical C3 Casting Competence Center GmbH
Publication of EP2164655A2 publication Critical patent/EP2164655A2/fr
Withdrawn legal-status Critical Current

Links

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
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/04—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces of multiple-hearth type; of multiple-chamber type; Combinations of hearth-type furnaces
    • F27B3/045—Multiple chambers, e.g. one of which is used for charging
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B21/00—Obtaining aluminium
    • C22B21/0084—Obtaining aluminium melting and handling molten aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B21/00—Obtaining aluminium
    • C22B21/06—Obtaining aluminium refining
    • 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
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type 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
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces
    • F27B3/20—Arrangements of heating devices
    • 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
    • F27D27/00—Stirring devices for molten material

Definitions

  • the invention relates to a method for melting and keeping molten metal, in particular non-ferrous metal melts, as well as a melting and holding furnace for molten metals, in particular for melting, keeping warm and dosing of non-ferrous molten metals, e.g. of aluminum materials.
  • DE-OS 2022989 describes a dosing automatic for liquid metals, in which a holding furnace is charged via a feed flap with molten metal and the discharge of the amount of metal to be metered is charged via a discharge pipe. If melt is to be metered, the furnace is pressurized with compressed air and the melt rises in the delivery pipe. According to JP-A-20031117649, the pressurization with inert gases can be done to minimize oxide formation.
  • a metering container is connected via a closable opening with the melting space of the holding furnace in the flow direction.
  • the dosing is in turn emptied by pressurization via a riser, wherein the aforementioned opening is arranged in the bottom of the dosing and can be closed from the inside by means of a valve body.
  • FIG. 10 Another holding furnace with dosing device is disclosed in WO-A-2004089562.
  • a metering chamber is integrated in such a way that it is mounted with a delivery pipe in the holding furnace.
  • a metering furnace contains a holding chamber and a metering chamber, which are interconnected by a closable channel. For dosing in the dosing chamber located melt is acted upon at the surface with compressed gas and enters a riser to the casting.
  • a melting and casting furnace contains a heatable furnace space, which is divided by partitions into several chambers.
  • the partitions have openings for the melt and for heating or flue gases.
  • the opening for the passage of melt between a preheating and a compensation chamber is arranged below the bath level in the preheating chamber.
  • a burner heater is used, which acts with its flame from the end of a heating chamber from the bath surface.
  • the metal to be melted is introduced cyclically into a flood chamber, as a result of a variable pendulum motion of the furnace, a pedestal is overflowed by melt and absorbs the melt.
  • the burner is located below the pedestal in a heating chamber, into which the molten metal passes before it expires.
  • the pendulum bearing of the furnace is complex and the function of the furnace is dependent on an exact control of the pendulum movements.
  • a molten metal holding furnace comprises a multi-chamber sump having a melt filling funnel, a holding chamber and a scooping chamber, the holding chamber being coverable by a lid and the chambers provided with passages below the surface of the molten metal used.
  • the scoop chamber has a deeper bottom which causes sumping.
  • the invention has for its object to develop a method for melting and keeping molten metal, especially non-ferrous molten metals, which avoids the disadvantages of the prior art and allows melting, keeping warm, cleaning and dosing without pressure boosting or an additional Umschmeizofen.
  • the melt to be dosed should be low in gas and slag.
  • a further object of the invention is to provide a melting and holding furnace for molten metals, in particular for melting, keeping warm and metering non-ferrous molten metals, e.g. of aluminum materials.
  • Fig. 1 a melting and holding furnace
  • Fig. 2 a melting and holding chamber of the furnace
  • Fig. 3 the holding chamber with warming chamber
  • FIG. 4 shows a further embodiment of the holding chamber.
  • a melting and holding furnace 1 includes a lift 2 to the melting chamber 5 with a melting stage 4, are poured into the parts to be melted from aluminum through an unspecified opening from.
  • the melting chamber 5 is provided with a safety valve 13 "(safety flap), which is surrounded by an exhaust hood 3 with a trigger 13 to a chimney or fan and has two parallel adjacent burner 11 lower power, which are directed to the melting stage 4
  • the small burning energy of the burners 11 enables a dropwise melting of the aluminum parts, and in the case of furnaces of a small design a burner 11 may be sufficient.
  • Below the melting stage 4, a pre-bath 6 is arranged, drips into the molten metal.
  • the pre-bath 6 is provided with a further burner 12 also of lower power. The pre-bath 6 is used to calm the melt.
  • the pre-bath 6 is connected via a channel 17, which is arranged below the melt level with a holding chamber 16.
  • the holding chamber 16 is equipped with an impeller 9 for stirring the melt.
  • the holding chamber 16 is in turn connected by means of a channel 8, which is located below the Schmelzbadspiegels, with a second holding chamber, a scooping chamber 7.
  • a ladle 14 can dive for portionwise removal of melt.
  • the ladle is associated with a device for Kornfei- tion 10.
  • the scrap to be processed is conveyed by means of the elevator 2 in the melting chamber 5 on the melting stage 4. There it is melted so slowly and gently by means of the gas burner 11 that molten metal drops from the melting stage 4 into the prebath 6 drop by drop. A "hole-shaped" melting is avoided by the use of two burners 11. The slow melt resp. Melting avoids overheating of the metal and burning of lower melting alloying elements.
  • All burners 11, 12 allow freely selectable temperatures of the melt between about 61O 0 C to 740 0 C. is preferably melted at temperatures below 650 ° C, resulting in long service life of the furnace.
  • the oven works with max. 2% excess air (possibly inert gas), in particular in the region of the melting chamber 5.
  • the safety valve 13 is always slightly open (adapted to the burner performance) and allows a deduction of air and flue gases. With possible pressure increases the safety valve 13 'opens completely.
  • the melt is heated by another gas burner 12. Under the bath surface, the melt flows through the channel 8 into the scoop chamber 7. This has the advantage that only a small amount of gas can be absorbed and that the bath is calm.
  • the impeller 9 of the holding chamber 16 homogenizes, cleans and degasifies the melt.
  • the melt could be held by another, not explicitly shown heater to temperature. Usually, however, the heat transfer from the holding chamber is considered sufficient.
  • the supply of raw material to be melted takes place in dependence on the Schmelzeaustrag from the scoop chamber 7 to ensure that the first supplied material is also discharged first again. In addition, an overload of the furnace is avoided.
  • the holding chamber 16 may consist of two interconnected sub-chambers 16 x , each sub-chamber may be equipped with an impeller 9.
  • each sub-chamber may be equipped with an impeller 9.
  • already molten metal can be emptied with a crucible 15 in the pre-bath 6. This eliminates the melting stage. 4
  • an exothermic salt is added, for cleaning the melt in the holding chamber 16, however, an endothermic salt.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

L'invention concerne un procédé de fusion et de maintien à température de métal fondu, en particulier de métaux non ferreux fondus, pour la fusion, le maintien à température et le dosage de métal non ferreux fondu, par exemple des matériaux à base d'aluminium, dans un four qui présente des chambres séparées pour la fusion, le maintien à température et le prélèvement du bain de fusion, de l'énergie thermique étant apportée au bain de fusion dans la chambre de fusion. Pour obtenir des bains de fusion de haute qualité dans un seul four, le métal à fondre est fondu de manière modérée et goutte à goutte.
EP07815116A 2007-07-06 2007-09-28 Procédé de fusion et de maintien à température de métal fondu, et four de fusion et de maintien à température de métal fondu Withdrawn EP2164655A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH10912007 2007-07-06
PCT/CH2007/000479 WO2009006744A2 (fr) 2007-07-06 2007-09-28 Procédé de fusion et de maintien à température de métal fondu, et four de fusion et de maintien à température de métal fondu

Publications (1)

Publication Number Publication Date
EP2164655A2 true EP2164655A2 (fr) 2010-03-24

Family

ID=38657389

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07815116A Withdrawn EP2164655A2 (fr) 2007-07-06 2007-09-28 Procédé de fusion et de maintien à température de métal fondu, et four de fusion et de maintien à température de métal fondu

Country Status (2)

Country Link
EP (1) EP2164655A2 (fr)
WO (1) WO2009006744A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012108511A1 (de) * 2012-09-12 2014-03-13 Ks Aluminium-Technologie Gmbh Dosierofen für eine Druckgussanlage und Verfahren zum Dosieren von Schmelze in eine Gießform mit einem derartigen Dosierofen
CN112212689A (zh) * 2020-10-13 2021-01-12 济南海德热工有限公司 一种蓄热式燃气坩埚炉

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2022989C3 (de) 1970-05-12 1974-04-04 Westofen Gmbh, 6200 Wiesbaden Vorrichtung zum Dosieren von geschmolzenem Metall
US4190404A (en) 1977-12-14 1980-02-26 United Technologies Corporation Method and apparatus for removing inclusion contaminants from metals and alloys
DE3034970C2 (de) 1980-09-17 1983-06-30 Bleiwenz GmbH, 6920 Sinsheim Warmhalteofen für Metallschmelzen
DE3239146A1 (de) 1982-10-22 1984-04-26 Rudolf Dipl.-Ing. 4048 Grevenbroich Koppatz Schmelz- und giessofen
JP2536601B2 (ja) * 1988-09-03 1996-09-18 富士電機株式会社 連続溶解注湯炉
DE8911447U1 (de) 1989-09-18 1990-01-18 Koppatz, Rudolf, Dipl.-Ing., 4048 Grevenbroich Schmelz- und Gießofen
DE19504415B4 (de) 1994-06-24 2004-12-02 Denso Corp., Kariya Warmhalteofen für eine Metallschmelze und Verfahren zur Aufnahme von Metallschmelze in einem derartigen Ofen
DE19821650A1 (de) 1998-05-14 1999-11-25 Striko Westofen Gmbh Vorrichtung zum Vergießen von Metallschmelze
JP3796617B2 (ja) 1998-10-23 2006-07-12 日本坩堝株式会社 アルミニウムインゴット等の溶解保持炉
JP2001239357A (ja) 2000-02-29 2001-09-04 Aisin Seiki Co Ltd 給湯装置
US6500228B1 (en) 2001-06-11 2002-12-31 Alcoa Inc. Molten metal dosing furnace with metal treatment and level control and method
JP3581341B2 (ja) 2001-10-11 2004-10-27 有限会社太田製作所 金属溶湯の定量供給法及び金属溶湯供給ポンプ
DE10316758A1 (de) 2003-04-10 2004-10-28 Bühler AG Warmhalteofen und Dosiervorrichtung für Metallschmelzen
DE102004048043A1 (de) 2003-10-02 2005-06-16 Zpf Therm Gmbh Warmhalte- und Dosierofen für NE-Metalle mit Dosiervorrichtung
JP2005254270A (ja) * 2004-03-10 2005-09-22 Denso Corp 溶解保持炉及び溶解保持炉制御装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009006744A2 *

Also Published As

Publication number Publication date
WO2009006744A8 (fr) 2009-10-15
WO2009006744A3 (fr) 2009-05-07
WO2009006744A2 (fr) 2009-01-15

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