EP0870068A1 - Utilisation d'un procede de fonte de mitrailles de metaux legers - Google Patents

Utilisation d'un procede de fonte de mitrailles de metaux legers

Info

Publication number
EP0870068A1
EP0870068A1 EP96945861A EP96945861A EP0870068A1 EP 0870068 A1 EP0870068 A1 EP 0870068A1 EP 96945861 A EP96945861 A EP 96945861A EP 96945861 A EP96945861 A EP 96945861A EP 0870068 A1 EP0870068 A1 EP 0870068A1
Authority
EP
European Patent Office
Prior art keywords
melt
vessel
light metal
melting
metal scrap
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Withdrawn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
EP96945861A
Other languages
German (de)
English (en)
Inventor
Wilfried Schmitz
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.)
Otto Junker GmbH
Original Assignee
Otto Junker 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 Otto Junker GmbH filed Critical Otto Junker GmbH
Publication of EP0870068A1 publication Critical patent/EP0870068A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/001—Dry processes
    • C22B7/003—Dry processes only remelting, e.g. of chips, borings, turnings; apparatus used therefor
    • 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
    • C22B21/0092—Remelting scrap, skimmings or any secondary source aluminium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the invention relates to the use of a method for treating molten metals by adding chemically active substances or alloying elements, the molten metal being in a suitable im
  • essentially cylindrical vessel is set in motion by means of electromagnetic force and the vessel is also filled at least up to more than half with the melt to be treated, the melt is lifted by a rotational movement about the vessel axis up to the apex of the vessel and then essentially in the direction of the vessel axis onto the Enamel surface
  • the method described above is known in iron metallurgy and has so far been used exclusively there. It is successfully used there for the treatment of pig iron. Treatment includes the addition of alloying elements or chemically active substances for the purpose of changing the material properties of the iron, e.g. for desulfurization, to understand.
  • the method and a stirring vessel suitable for carrying out the method are described in EP-PS 0 252 308.
  • the method is suitable for melting a finely divided light metal scrap into a melt of this light metal.
  • the method described at the outset which is known per se for treating pig iron, is used, the light metal scrap is introduced quickly into the light metal melt, so that oxidation takes place only to a very small extent.
  • the melt is whole, i.e. existing melt plus melted material plus resulting dross, continuously conveyed so that no dross layer can accumulate on the melt. This can be separated from the melt by suitable devices on the stirring vessel or later within the melt circuit.
  • the amount of molten salt to be added is reduced e.g. when introducing aluminum chips into an aluminum melt to a range below 5%. If necessary, it can be completely omitted.
  • the invention can advantageously provide a method for reusing finely divided aluminum scrap.
  • the light metal scrap can already be in fine form, e.g. as machining residues, which can also be contaminated. So z. B. melted with lubricant residues chips.
  • a vessel which is also known from the aforementioned EP-PS 252 308 for the treatment of a molten metal is preferably used as the stirring vessel.
  • the vessel is cylindrical and is arranged horizontally or slightly inclined. Outside the wall of the vessel there are inductors which exert both torsional and axial forces on the molten metal.
  • the stirring vessel is provided with means for adding materials to the metal surface.
  • the melt is preferably produced in a melting furnace, overheated there to such an extent that its temperature when the heat of fusion is released to the light metal to be melted is still above the melting temperature and then fed to the vessel for melting the light metal scrap.
  • a melting furnace which is heated with fuel, eg. B. gas heated oven.
  • the melt can be fed to the vessel for melting the light metal scrap via a channel system with gravity drain and / or metal pump.
  • a continuous process is preferably maintained here.
  • the method can preferably also be carried out in such a way that the melt is passed to a vessel used for keeping warm, pouring or metallurgical treatment after it has passed the vessel to melt the light metal scrap.
  • a dross separation can be carried out by means of phase separation, it having proven to be advantageous that the melt, after passing through the vessel, is fed directly to a vessel for carrying out the phase separation in order to melt the light metal scrap.
  • the process can be carried out in such a way that the melt is returned to the melting furnace.
  • a melt of the light metal is kept in stock, the amount of which does not fall below a certain minimum amount.
  • the melt present in the melting furnace 1 is overheated by the addition of energy to such an extent that its temperature is still above the melting temperature when heat of melting is released to the material to be melted.
  • the melting furnace 1 can e.g. be gas heated.
  • the melt is fed to a stirring vessel 4 via a metal pump 2 and a channel 3.
  • the metal pump 2 can be a mechanical or inductive pump.
  • the melt is added via the charging device 5.
  • the melt In the stir-in vessel 4, the melt is inductively raised on one or both side vessel walls and falls back on the melt. At the same time, the melt is moved axially through the stirring vessel 4 in the entire stirring area. After passing through the stir-in vessel 4, the melt, which has been increased by the melted-down material, is first fed to a dross box 6 for dross separation. The melt then returns via a further channel 7 to the inlet 8 of the melting furnace 1, from which it can be removed for further processing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

L'introduction de mitrailles de métaux légers, par exemple de copeaux de métaux légers, dans une masse fondue de métaux légers représente jusqu'à maintenant un grand problème technique. Etonnamment, on a découvert qu'un procédé connu en métallurgie du fer et utilisé jusqu'à aujourd'hui exclusivement dans ce domaine convient pour fondre une mitraille de métaux légers dans une masse fondue du même métal léger. La masse fondue est mise en mouvement par des inducteurs dans un récipient cylindrique et soulevée jusqu'au sommet du récipient, puis retombe sur la surface de la masse fondue, car les substances contenues dans les mitrailles de métaux légers se dissolvent ainsi dans le flux de métal qui retombe sur la surface de la masse fondue. L'invention met ainsi à disposition un procédé avantageux de réutilisation de mitraille d'aluminium. Il permet par exemple de faire fondre même des copeaux d'aluminium mouillés de résidus de lubrifiants.
EP96945861A 1995-11-10 1996-11-05 Utilisation d'un procede de fonte de mitrailles de metaux legers Withdrawn EP0870068A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE1995141993 DE19541993A1 (de) 1995-11-10 1995-11-10 Anwendung eines Verfahrens zum Behandeln von Metallschmelzen
DE19541993 1995-11-10
PCT/DE1996/002105 WO1997017476A1 (fr) 1995-11-10 1996-11-05 Utilisation d'un procede de fonte de mitrailles de metaux legers

Publications (1)

Publication Number Publication Date
EP0870068A1 true EP0870068A1 (fr) 1998-10-14

Family

ID=7777171

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96945861A Withdrawn EP0870068A1 (fr) 1995-11-10 1996-11-05 Utilisation d'un procede de fonte de mitrailles de metaux legers

Country Status (3)

Country Link
EP (1) EP0870068A1 (fr)
DE (1) DE19541993A1 (fr)
WO (1) WO1997017476A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005027320A1 (de) * 2005-06-13 2006-12-14 Karl Konzelmann Metallschmelzwerke Gmbh & Co.Kg Chargenschmelzen von Aluminium-Legierungsschrott in einem Drehtrommelofen
DE102021121030A1 (de) * 2021-08-12 2023-02-16 Otto Junker Gesellschaft mit beschränkter Haftung Vorrichtung zur induktiven Erwärmung einer Metallschmelze, Mehrkammerschmelzofen zum Schmelzen von Schrott aus Metall und Verfahren zum Schmelzen von Schrott aus Metall

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935003A (en) * 1974-02-25 1976-01-27 Kaiser Aluminum & Chemical Corporation Process for melting metal
GB8314577D0 (en) * 1983-05-26 1983-06-29 Alcan Int Ltd Recovery of aluminium scrap
ATE31579T1 (de) * 1983-08-04 1988-01-15 Alusuisse Verfahren und vorrichtung zum zufuehren von metall in eine metallschmelze.
CA1328563C (fr) * 1986-06-12 1994-04-19 Paul Metz Methode de traitement des coulees metalliques et appareil pour la mise en oeuvre de ladite methode
JP3299332B2 (ja) * 1992-04-24 2002-07-08 株式会社宮本工業所 アルミニウム合金の廃材溶解装置
GB9217802D0 (en) * 1992-08-21 1992-10-07 Cookson Aluminium Ltd A furnace

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9717476A1 *

Also Published As

Publication number Publication date
DE19541993A1 (de) 1997-05-15
WO1997017476A1 (fr) 1997-05-15

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