EP2203572A1 - Elektroofen mit elektrodenbohrungen zum fördern und aufschmelzen von metallpulver - Google Patents
Elektroofen mit elektrodenbohrungen zum fördern und aufschmelzen von metallpulverInfo
- Publication number
- EP2203572A1 EP2203572A1 EP08840071A EP08840071A EP2203572A1 EP 2203572 A1 EP2203572 A1 EP 2203572A1 EP 08840071 A EP08840071 A EP 08840071A EP 08840071 A EP08840071 A EP 08840071A EP 2203572 A1 EP2203572 A1 EP 2203572A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bore
- electric furnace
- electrode
- furnace according
- dad
- 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- Withdrawn
Links
- 229910052751 metal Inorganic materials 0.000 title description 3
- 239000002184 metal Substances 0.000 title description 3
- 238000002844 melting Methods 0.000 title description 2
- 230000008018 melting Effects 0.000 title description 2
- 239000000843 powder Substances 0.000 title description 2
- 239000012768 molten material Substances 0.000 claims abstract description 5
- 239000000428 dust Substances 0.000 abstract description 32
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000008188 pellet Substances 0.000 description 6
- 229910002555 FeNi Inorganic materials 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010327 methods by industry Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005453 pelletization Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000012432 intermediate storage Methods 0.000 description 1
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
- C22B4/08—Apparatus
-
- 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
- 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
- C22B7/02—Working-up flue dust
-
- 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
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/22—Remelting metals with heating by wave energy or particle radiation
- C22B9/226—Remelting metals with heating by wave energy or particle radiation by electric discharge, e.g. plasma
-
- 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
- F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces heated electrically, with or without any other source of heat
-
- 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
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/18—Charging particulate material using a fluid carrier
-
- 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
- H05B7/00—Heating by electric discharge
- H05B7/02—Details
- H05B7/06—Electrodes
- H05B7/08—Electrodes non-consumable
-
- 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
- H05B7/00—Heating by electric discharge
- H05B7/18—Heating by arc discharge
- H05B7/20—Direct heating by arc discharge, i.e. where at least one end of the arc directly acts on the material to be heated, including additional resistance heating by arc current flowing through the material to be heated
-
- 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
- C22B23/00—Obtaining nickel or cobalt
- C22B23/02—Obtaining nickel or cobalt by dry processes
- C22B23/023—Obtaining nickel or cobalt by dry processes with formation of ferro-nickel or ferro-cobalt
-
- 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 an electric furnace having a receiving space for molten material, wherein at least one electrode protrudes into the receiving space and wherein means for introducing dust are present in the receiving space.
- Dust is produced in steelmaking, some of which contain valuable components, so that their recovery is aimed for.
- the dust is produced in the course of the process as a result of the respective oxidation or other process steps to be carried out.
- the dust may, especially if it is a so-called secondary metallurgical dust, have a relatively high proportion of compounds of high-quality elements such as chromium or nickel.
- the release of such dusts represents a not inconsiderable environmental impact.
- the high quality components are interesting for economic reasons because of their value. It is therefore known to return the dusts to an oven in order to recover the valuable constituents.
- the dust which is generated in particular during FeNi production, thus represents a technical problem.
- the transport and storage of the dust require a high personnel and technical effort.
- the effective processing of the dust in the rotary kiln rarely succeed, since the production of mechanically and thermally stable pellets is difficult and expensive.
- the contamination of the entire system (roads, buildings, air) is significant.
- the solution of this object by the invention is characterized in that the means for introducing dusts into the receiving space of the furnace comprise an at least partially extending in the longitudinal direction of the electrode bore.
- the bore preferably has a circular cross section. It may be concentric to a longitudinal axis of the electrode, but alternatively also eccentric to this.
- the bore may also be directly or indirectly connected to a dewatering conveyor. It can communicate with at least one bore drilling the bore.
- the connection bore may be formed as a blind bore, which ends in the interior of the electrode.
- the bore or a bore terminates near a tip of the electrode to be delivered under optimal process conditions.
- the at least one electrode is preferably arranged in an upper region of the furnace.
- the electric furnace is advantageously an electric reduction furnace or a rotary hearth furnace.
- the operating costs can be lowered by a reduced consumption of fuel (oil, gas, etc.) and reducing agents (coke, coal, etc.).
- FIG. 1 schematically shows an electroreduction furnace with electrodes arranged in the upper region
- Fig. 2 is an enlarged view of one of the electrodes of the furnace, shown partially in section.
- an electric furnace 1 is sketched in the form of an electric reduction furnace, which has a receiving space 2 for molten material (molten metal).
- the heating of the material to be melted is effected in a known manner by means of an arc, which is generated by electrical means between the tips 11 (see FIG. 2) of two electrodes 4 and 5.
- the furnace 1 is further provided with means 6, with which the introduction of dusts S (in a dust-like state) is possible.
- the dusts are subjected to a treatment in the oven in order to recover valuable elements from the dust.
- the means 6 for introducing dusts S into the receiving space 2 comprise a bore 7 running at least partially in the longitudinal direction L of the electrode 4, 5.
- the bore 7 is arranged eccentrically to the longitudinal axis 8 of the electrode 4 in the exemplary embodiment according to FIG.
- a suitable conveying device 9 see Fig. 1
- the electrode 4, 5 is therefore designed according to the invention as a hollow electrode, wherein dust can be passed through the cavity (bore) in the interior of the electrode 4, 5 in the melt.
- connecting bores 10 are provided, which together with the bore 7 form a pneumatic or fluidic conveying channel for the dust S. This makes it possible to apply the dust as close as possible to the location of the arc between the electrodes 4, 5 and thus to improve the processing of the dust S.
- the dusts S which are generally produced in the process chain during the production of FeNi, are thus preferably fed directly to the electrode tips by at least one opening in the electrodes of the electric furnace.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Plasma & Fusion (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geochemistry & Mineralogy (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200710048962 DE102007048962A1 (de) | 2007-10-12 | 2007-10-12 | Elektroofen |
| PCT/EP2008/008369 WO2009049777A1 (de) | 2007-10-12 | 2008-10-02 | Elektroofen mit elektrodenbohrungen zum fördern und aufschmelzen von metallpulver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2203572A1 true EP2203572A1 (de) | 2010-07-07 |
Family
ID=40210840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08840071A Withdrawn EP2203572A1 (de) | 2007-10-12 | 2008-10-02 | Elektroofen mit elektrodenbohrungen zum fördern und aufschmelzen von metallpulver |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP2203572A1 (de) |
| KR (1) | KR20100046054A (de) |
| CN (1) | CN101861404A (de) |
| AU (1) | AU2008314187B2 (de) |
| DE (1) | DE102007048962A1 (de) |
| RU (1) | RU2010119037A (de) |
| TW (1) | TW200925285A (de) |
| WO (1) | WO2009049777A1 (de) |
| ZA (1) | ZA201001099B (de) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1257308B (de) * | 1965-10-29 | 1967-12-28 | Sueddeutsche Kalkstickstoff | Lichtbogenschmelzofen mit Stoffzufuhr durch Hohlelektroden |
| DD119651A1 (de) * | 1974-11-07 | 1976-05-05 | ||
| DE2607650A1 (de) | 1976-02-25 | 1977-09-01 | Sumitomo Heavy Industries | Verfahren zur herstellung von rohpellets fuer die chemische reduktion in einem drehrohrofen aus einem eisen enthaltenden staub |
| SE431994B (sv) * | 1978-01-24 | 1984-03-12 | Asea Ab | Forfaringssett for injicering av pulverformigt material i en metallurgisk smelta sasom stal |
| CH653201A5 (en) * | 1981-03-18 | 1985-12-13 | Bbc Brown Boveri & Cie | Hollow electrode for feeding arc furnaces |
| US4758268A (en) | 1986-12-23 | 1988-07-19 | Zia Technology, Inc. | Method and apparatus for reclaiming metal values from electric arc furnace flue dust and sludge and rendering residual solids recyclable or non-hazardous |
| AT394396B (de) | 1990-07-03 | 1992-03-25 | Voest Alpine Stahl Donawitz | Verfahren zur wiederverwendung von huettenstaeuben sowie vorrichtung zur durchfuehrung dieses verfahrens |
| CA2030727C (fr) * | 1990-11-23 | 1993-07-20 | Michel G. Drouet | Four a arc rotatif pour le traitement des scories d'aluminium |
| JP4159634B2 (ja) | 1997-10-23 | 2008-10-01 | 株式会社神戸製鋼所 | 金属鉄の製法および装置 |
| DE10042112A1 (de) | 2000-08-28 | 2002-03-14 | Sms Demag Ag | Verfahren zur Behandlung wertstoffhaltigen Staubes |
| DE10207202B9 (de) * | 2002-02-21 | 2006-05-04 | Code Gmbh Commercial Developments | Verfahren zur metallurgischen Verwertung von metallhaltigen Schlämmen und Stäuben |
-
2007
- 2007-10-12 DE DE200710048962 patent/DE102007048962A1/de not_active Withdrawn
-
2008
- 2008-10-02 EP EP08840071A patent/EP2203572A1/de not_active Withdrawn
- 2008-10-02 WO PCT/EP2008/008369 patent/WO2009049777A1/de not_active Ceased
- 2008-10-02 KR KR20107005965A patent/KR20100046054A/ko not_active Ceased
- 2008-10-02 AU AU2008314187A patent/AU2008314187B2/en not_active Ceased
- 2008-10-02 CN CN200880111110A patent/CN101861404A/zh active Pending
- 2008-10-02 RU RU2010119037/02A patent/RU2010119037A/ru unknown
- 2008-10-09 TW TW97138811A patent/TW200925285A/zh unknown
-
2010
- 2010-02-16 ZA ZA201001099A patent/ZA201001099B/xx unknown
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009049777A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20100046054A (ko) | 2010-05-04 |
| TW200925285A (en) | 2009-06-16 |
| RU2010119037A (ru) | 2011-11-20 |
| AU2008314187B2 (en) | 2011-01-06 |
| AU2008314187A1 (en) | 2009-04-23 |
| WO2009049777A1 (de) | 2009-04-23 |
| DE102007048962A1 (de) | 2009-04-16 |
| ZA201001099B (en) | 2010-10-27 |
| CN101861404A (zh) | 2010-10-13 |
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Legal Events
| Date | Code | Title | Description |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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| 17P | Request for examination filed |
Effective date: 20100512 |
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| AK | Designated contracting states |
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| AX | Request for extension of the european patent |
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| DAX | Request for extension of the european patent (deleted) | ||
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
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| RTI1 | Title (correction) |
Free format text: ELECTRIC FURNACE WITH ELECTRODE BORE HOLES FOR DELIVERING AND MELTING METAL POWDER |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
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| 18W | Application withdrawn |
Effective date: 20110416 |