WO1997017476A1 - Use of a process for melting small pieces of light metal scrap - Google Patents
Use of a process for melting small pieces of light metal scrap Download PDFInfo
- Publication number
- WO1997017476A1 WO1997017476A1 PCT/DE1996/002105 DE9602105W WO9717476A1 WO 1997017476 A1 WO1997017476 A1 WO 1997017476A1 DE 9602105 W DE9602105 W DE 9602105W WO 9717476 A1 WO9717476 A1 WO 9717476A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- melt
- vessel
- light metal
- melting
- metal scrap
- Prior art date
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
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96945861A EP0870068A1 (en) | 1995-11-10 | 1996-11-05 | Use of a process for melting small pieces of light metal scrap |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1995141993 DE19541993A1 (en) | 1995-11-10 | 1995-11-10 | Use of a process for treating molten metals |
DE19541993.6 | 1995-11-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997017476A1 true WO1997017476A1 (en) | 1997-05-15 |
Family
ID=7777171
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1996/002105 WO1997017476A1 (en) | 1995-11-10 | 1996-11-05 | Use of a process for melting small pieces of light metal scrap |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0870068A1 (en) |
DE (1) | DE19541993A1 (en) |
WO (1) | WO1997017476A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005027320A1 (en) * | 2005-06-13 | 2006-12-14 | Karl Konzelmann Metallschmelzwerke Gmbh & Co.Kg | Batch melting of aluminum alloy scrap in a rotary drum furnace |
DE102021121030A1 (en) * | 2021-08-12 | 2023-02-16 | Otto Junker Gesellschaft mit beschränkter Haftung | Device for inductively heating molten metal, multi-chamber melting furnace for melting metal scrap and method for melting metal scrap |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2332510A1 (en) * | 1974-02-25 | 1977-06-17 | Kaiser Aluminium Chem Corp | REACTIVE METAL FUSION PROCESS AND PLANT |
EP0129975A1 (en) * | 1983-05-26 | 1985-01-02 | Alcan International Limited | Recovery of aluminium scrap |
EP0133417A2 (en) * | 1983-08-04 | 1985-02-20 | Schweizerische Aluminium Ag | Process and device for the introduction of metal to a metal melt |
EP0252308A1 (en) * | 1986-06-12 | 1988-01-13 | Centrem S.A. | Process for treating metal melts and installation for performing the method |
GB2266896A (en) * | 1992-04-24 | 1993-11-17 | Miyamoto Kogyosho Kk | Process and apparatus for melting aluminium alloy scraps |
GB2269889A (en) * | 1992-08-21 | 1994-02-23 | Cookson Group Plc | Melting furnace |
-
1995
- 1995-11-10 DE DE1995141993 patent/DE19541993A1/en not_active Withdrawn
-
1996
- 1996-11-05 WO PCT/DE1996/002105 patent/WO1997017476A1/en not_active Application Discontinuation
- 1996-11-05 EP EP96945861A patent/EP0870068A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2332510A1 (en) * | 1974-02-25 | 1977-06-17 | Kaiser Aluminium Chem Corp | REACTIVE METAL FUSION PROCESS AND PLANT |
EP0129975A1 (en) * | 1983-05-26 | 1985-01-02 | Alcan International Limited | Recovery of aluminium scrap |
EP0133417A2 (en) * | 1983-08-04 | 1985-02-20 | Schweizerische Aluminium Ag | Process and device for the introduction of metal to a metal melt |
EP0252308A1 (en) * | 1986-06-12 | 1988-01-13 | Centrem S.A. | Process for treating metal melts and installation for performing the method |
GB2266896A (en) * | 1992-04-24 | 1993-11-17 | Miyamoto Kogyosho Kk | Process and apparatus for melting aluminium alloy scraps |
GB2269889A (en) * | 1992-08-21 | 1994-02-23 | Cookson Group Plc | Melting furnace |
Also Published As
Publication number | Publication date |
---|---|
DE19541993A1 (en) | 1997-05-15 |
EP0870068A1 (en) | 1998-10-14 |
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