WO2001021843A1 - Verfahren und einrichtung zum einbringen von schüttgut in ein metallurgisches gefäss - Google Patents
Verfahren und einrichtung zum einbringen von schüttgut in ein metallurgisches gefäss Download PDFInfo
- Publication number
- WO2001021843A1 WO2001021843A1 PCT/EP2000/009248 EP0009248W WO0121843A1 WO 2001021843 A1 WO2001021843 A1 WO 2001021843A1 EP 0009248 W EP0009248 W EP 0009248W WO 0121843 A1 WO0121843 A1 WO 0121843A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bulk material
- bulk
- lid
- container
- vessel
- 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.)
- Ceased
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/527—Charging of the electric furnace
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/56—Manufacture of steel by other methods
- C21C5/562—Manufacture of steel by other methods starting from scrap
-
- 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
- F27B3/18—Arrangements of devices for charging
- F27B3/183—Charging of arc furnaces vertically through the roof, e.g. in three points
-
- 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
- F27B3/28—Arrangement of controlling, monitoring, alarm or the like devices
-
- 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
- F27B3/12—Working chambers or casings; Supports therefor
-
- 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
- F27D3/04—Ram or pusher apparatus
- F27D2003/045—Ram or pusher apparatus used to pull the charge
-
- 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
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
- F27D2019/0059—Regulation involving the control of the conveyor movement, e.g. speed or sequences
-
- 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
- F27D21/00—Arrangement of monitoring devices; Arrangement of safety devices
- F27D21/0035—Devices for monitoring the weight of quantities added to the charge
- F27D2021/0042—Monitoring the level of the solid charge
-
- 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
- F27D3/0025—Charging or loading melting furnaces with material in the solid state
- F27D3/0031—Charging with tiltable dumpers
-
- 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
- F27D3/04—Ram or pusher apparatus
-
- 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 a method for introducing bulk material into a metallurgical vessel, in particular scrap into an electric arc furnace, which has at least one centrally arranged electrode in an upper part of the vessel which is closed in a gas-tight manner and a corresponding device.
- Metallurgical vessels are usually filled in batches, so arc furnaces are regularly charged using scrap baskets.
- EP 0 646 652 B1 discloses a steelworks facility with a closed, tiltable arc furnace, which has a loading device with at least two storage containers. These storage containers are arranged on both sides of the electrode support arm and fastened to the indoor stage. The storage containers have a bottom that can be removed during charging. Continuous loading of the furnace vessel is not possible with these containers.
- DE 197 53 184 A1 discloses a melting furnace system for melting metals, in which a central tube is provided coaxially with the main furnace axis, in which at least one electrode is arranged and in which a container can be placed on the furnace head.
- the batch is temporarily stored above the furnace top vessel closed with the lid, and when the furnace lid is opened, the batch falls into the interior of the furnace. Continuous filling of the furnace is also not possible with this known device.
- a charging device for arc furnaces in which an annular chamber is arranged on the furnace ceiling, wherein in a driving device is provided on the annular chamber, on which switchable load magnets are suspended. At least one material feed protrudes laterally into the furnace vessel, on which load magnets attached to the driving device are provided, which enable the charging material to be magnetically picked up and throw it off at any point within the furnace.
- the material is fed to the furnace via endless conveyor belts. This does not correspond to batch operation using independent bulk containers.
- the invention solves this problem by the features of method claim 1 and device claim 4.
- bulk material units which are independent of one another are used for conveying to the metallurgical vessel, for example the chutes known in the steelworks, as are used in converter operation.
- the lid closing the upper part of the metallurgical vessel is designed to be rotatable and has at least one opening.
- a docking device is provided, which is connected to the bulk material container filled with scrap. The bulk material is conveyed out of the container while rotating the lid. With this method, any point of the batch located in the upper part of the vessel can be reached in an annular region of the depth.
- the bulk material is conveyed out of the bulk material container in a controlled manner, either by ejection by means of a pusher or by transport. animals on a conveyor belt or by tilting the entire container.
- the use of independent chutes increases operational safety and reduces the demands on the scrap yard.
- a container for conveyed goods fails during use on the furnace head, its function can be taken over by another container. Another container can be brought into the charging area instead of the failed one. Possible faults on the container, in particular on the drive of the conveyor device, can then be serviced in a separate maintenance area.
- conveyor belts and vibratory troughs of any type are used as the conveying device.
- the bulk goods container is placed in a holder which effects the change of the bulk goods angle in a vertical and possibly in a horizontal position.
- the bulk goods container can be adjusted so that even hard-to-reach areas in the furnace top can be filled with bulk goods.
- the bulk container itself is very simple.
- a measuring and regulating device for detecting the fill level in the furnace head, control of both the lid rotation and the discharge speed of the conveying device being carried out via a computer system.
- the bulk containers are each placed in docking devices, which ensure environmentally friendly charging of the metallurgical vessel via adapted sealing strips.
- this sealing strip is spring-mounted.
- the individual bulk goods containers can be docked in any position on the lid.
- the bulk goods container is placed diagonally on the circular lid, the bulk goods container not protruding beyond the edge of the lid during charging.
- At least three bulk goods containers dock onto the furnace head, the individual containers being guided in a line which are guided tangentially to the center line of the addition openings. In this way, the individual containers hardly protrude beyond the edge of the lid and still allow the metallurgical vessel to be filled continuously even if one bulk container fails.
- Figure 1 An oven vessel with a bulk container arranged on the rotatable lid.
- Figure 2 An oven with two outwardly protruding bulk containers.
- FIG. 3 An electric arc furnace with a docking station.
- 4a-4c plan views of furnace vessels with the arrangement of the bulk material containers, shown reduced.
- FIGS. 1 to 3 each show metallurgical vessels, here in the form of arc furnaces with a lower vessel part 12 and an upper vessel part covered by a cover 15.
- the lid 15 or an annular lid part 16 is rotatably mounted on rollers 19 at the mouth of the upper vessel part 11 and driven by a lid rotary drive 51.
- a sleeve 13 is provided concentrically with the upper part 11 of the vessel, in which an electrode 21 is arranged.
- the electrode is located in a sleeve 13 which can be closed to the mouth of the upper part 11 of the vessel, the electrode 21 being connected via an electrode holder 22 to a support arm 23 which is connected to a support column 24 which is vertical via an electrode drive 57 is movable.
- the sleeve 13 is fastened to the upper part 11 of the vessel via a sleeve holder 14.
- annular lid part 16 On the mouth of the sleeve 13 and on the mouth of the upper vessel part 11, an annular lid part 16 is rotatably mounted on the lid bearings 19.
- the cover part 16 has an addition opening 17.
- a docking station 31 with a closable wall 32 configured here as a flap.
- a bulk goods container 41 can be docked at the docking station 31.
- a sealing strip 34 is provided at the docking station 31 towards the container 41.
- a motor 52 is attached to the outside of the bulk goods container 41, which corresponds to a drive rod 45 which is connected to a slide 42. With this slide 42, the bulk material can be predetermined in the direction of the mouth of the bulk container 41 move and continuously convey into the charging chamber 18 of the upper part 11 of the vessel.
- the electrode is held at the mouth of the sleeve 13 inclined towards the lower part 12 of the vessel by an electrode holder 22.
- the annular charging chamber 18 is closed at its mouth by an annular cover part 16.
- the ring-shaped cover part 16 can be rotated via the cover bearing 19 and can be driven by the rotary drive 51.
- Feed openings 17 are provided in the annular cover part 16. In the right part, the feed opening 17 is covered by a docking part 31, which has a closable wall (blind 32).
- the bulk material container 41 is stored in a tilting conveyor device 44 which tilts the bulk material container 41 by means of a tilting drive 53 or pivots the bulk material container with respect to the horizontal orientation by means of a pivoting drive 56.
- the closable wall 32 has shaped elements 33 which ensure a gas-tight seal between the docking part 31 and the front part of the bulk goods container 41.
- the bulk goods container 41 On the left-hand side, the bulk goods container 41 has a transport conveyor unit 43 in the floor area, which can be driven by a conveyor belt motor 54.
- the lower run of the conveyor belt is arranged outside the bulk material container 41 which is designed here as a chute.
- the transport conveyor unit 43 is connected via a measuring and control unit 62 to a fill level measuring device 61 provided in the upper part 11 of the vessel. Furthermore, the bulk goods container 41 is covered with a cover 47 in the present case. The cover 47 projects in the size of the addition opening 17 of the annular cover part 16 beyond the snout of the bulk material container 41.
- the docking station is designed as a simple feed opening 17 which can be closed with a cover 35.
- the electrode 21 is fastened to the support arm 23 via a holder 22, which can be moved vertically by a drive 57.
- the complete cover 15 is mounted on the cover bearing 19 and driven by the drive 51.
- a docking station 31 which has an adjustable wall 32, here a blind, which can be moved by a drive 55.
- FIGS. 4a to 4c show top views of the cover 15.
- 4a) shows a bulk goods container 41 which is guided across the cover 15 and is docked above the possibly arranged sleeve 13 at the docking station 31.
- FIG. 4b) shows two docking stations 31, each with a bulk container 41. In the right part of FIG. 4b) it is shown that the bulk container can not only be retracted and extended and can be docked to the docking station 31, but can also be pivoted and tilted.
- the individual bulk material containers 41 are connected to the docking stations 31 in such a way that the bulk material containers 41 are arranged centrally on a straight line G, the straight line G being arranged tangentially to a center line M, which is guided through the addition openings 17 is.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
Claims
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ROA200200228A RO121037B1 (ro) | 1999-09-22 | 2000-09-21 | Procedeu şi dispozitiv pentru introducerea materialelor în vrac într-un vas metalurgic |
| AU74209/00A AU7420900A (en) | 1999-09-22 | 2000-09-21 | Method and device for introducing bulk material into a metallurgical vessel |
| JP2001525399A JP2003510458A (ja) | 1999-09-22 | 2000-09-21 | 冶金容器中にばらもの材料を引き込むための方法及び装置 |
| KR1020027003523A KR20020035874A (ko) | 1999-09-22 | 2000-09-21 | 야금용기 내에 벌크 재료를 도입하기 위한 방법 및 장치 |
| BR0014224A BR0014224A (pt) | 1999-09-22 | 2000-09-21 | Processo e dispositivo para introduzir material a granel num recipiente metalúrgico |
| EP00962515A EP1222315A1 (de) | 1999-09-22 | 2000-09-21 | Verfahren und einrichtung zum einbringen von schüttgut in ein metallurgisches gefäss |
| CA 2388582 CA2388582A1 (en) | 1999-09-22 | 2000-09-21 | Method and device for introducing bulk material into a metallurgical vessel |
| MXPA02003073A MXPA02003073A (es) | 1999-09-22 | 2000-09-21 | Procedimiento y dispositivo para introducir material a granel en un recipiente metalurgico.. |
| EA200200394A EA003353B1 (ru) | 1999-09-22 | 2000-09-21 | Способ и устройство для загрузки сыпучего материала в металлургическую емкость |
| HU0202808A HUP0202808A2 (en) | 1999-09-22 | 2000-09-21 | Method and device for introducing bulk material into a metallurgical vessel |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19945489A DE19945489A1 (de) | 1999-09-22 | 1999-09-22 | Verfahren und Einrichtung zum Einbringen von Schüttgut in ein metallurgisches Gefäss |
| DE19945489.2 | 1999-09-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2001021843A1 true WO2001021843A1 (de) | 2001-03-29 |
Family
ID=7922951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2000/009248 Ceased WO2001021843A1 (de) | 1999-09-22 | 2000-09-21 | Verfahren und einrichtung zum einbringen von schüttgut in ein metallurgisches gefäss |
Country Status (15)
| Country | Link |
|---|---|
| EP (1) | EP1222315A1 (de) |
| JP (1) | JP2003510458A (de) |
| KR (1) | KR20020035874A (de) |
| CN (1) | CN1376208A (de) |
| AU (1) | AU7420900A (de) |
| BR (1) | BR0014224A (de) |
| CA (1) | CA2388582A1 (de) |
| DE (1) | DE19945489A1 (de) |
| EA (1) | EA003353B1 (de) |
| HU (1) | HUP0202808A2 (de) |
| MX (1) | MXPA02003073A (de) |
| RO (1) | RO121037B1 (de) |
| TR (1) | TR200200750T2 (de) |
| WO (1) | WO2001021843A1 (de) |
| ZA (1) | ZA200203151B (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10333764B3 (de) * | 2003-07-23 | 2004-12-30 | Outokumpu Oy | Verfahren zum Chargieren von feinkörnigen Metallen in einen Elektrolichtbogenofen |
| DE102006044837A1 (de) | 2006-09-22 | 2008-04-03 | Siemens Ag | Vorrichtung zur Steuerung einer Lichtbogenofenanlage |
| DE102010045825A1 (de) * | 2010-09-20 | 2012-03-22 | Intracon Gmbh | Chargierschacht-System und Verfahren zum Befüllen |
| DE102013214775B3 (de) * | 2013-07-29 | 2014-11-20 | Siemens Vai Metals Technologies Gmbh | Vorrichtung zum Beladen eines metallurgischen Schmelzgefäßes mit Schrott |
| ES2962819T3 (es) * | 2020-08-20 | 2024-03-21 | Abp Induction Systems Gmbh | Instalación para el reciclaje de chatarra contaminada |
| CN119412945A (zh) * | 2025-01-07 | 2025-02-11 | 西冶科技集团股份有限公司 | 一种铁合金精炼炉全干式炉盖 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1010545B (de) * | 1953-11-28 | 1957-06-19 | Dingler Werke Ag | Beschickungsvorrichtung fuer Niederschachtoefen |
| DE1758842A1 (de) * | 1968-08-17 | 1971-01-14 | Krupp Gmbh | Beschickungseinrichtung,insbesondere fuer geschlossene Elektrooefen |
| EP0672881A1 (de) * | 1994-03-18 | 1995-09-20 | Nkk Corporation | Einschmelzofen mit einer Vorwärmeinrichtung |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1232177B (de) * | 1964-07-04 | 1967-01-12 | Demag Ag | Beschickungsvorrichtung fuer Metallschmelz- oder sonstige Industrieoefen, insbesondere zur Schrottbeschickung von Stahlerzeugungsoefen |
| FR2498309B1 (fr) * | 1981-01-20 | 1986-04-11 | Clesid Sa | Four electrique destine a la fusion de ferrailles et alimente en continu |
| AT398486B (de) * | 1992-12-09 | 1994-12-27 | Voest Alpine Ind Anlagen | Stahlwerks-elektroofen |
| DE4332913A1 (de) * | 1993-09-23 | 1995-03-30 | Mannesmann Ag | Stahlwerkseinrichtung mit geschlossenem kippbarem Lichtbogenofen |
| DE4407861C1 (de) * | 1994-03-04 | 1995-06-14 | Mannesmann Ag | Beschickungsvorrichtung für Lichtbogenofen |
| DE19753184A1 (de) * | 1997-11-21 | 1999-06-10 | Mannesmann Ag | Schmelzofenanlage |
| DE19755890A1 (de) * | 1997-12-05 | 1999-06-17 | Mannesmann Ag | Beschickungseinrichtung für Schachtöfen |
-
1999
- 1999-09-22 DE DE19945489A patent/DE19945489A1/de not_active Ceased
-
2000
- 2000-09-21 TR TR200200750T patent/TR200200750T2/xx unknown
- 2000-09-21 HU HU0202808A patent/HUP0202808A2/hu unknown
- 2000-09-21 BR BR0014224A patent/BR0014224A/pt not_active Application Discontinuation
- 2000-09-21 RO ROA200200228A patent/RO121037B1/ro unknown
- 2000-09-21 EA EA200200394A patent/EA003353B1/ru not_active IP Right Cessation
- 2000-09-21 MX MXPA02003073A patent/MXPA02003073A/es unknown
- 2000-09-21 KR KR1020027003523A patent/KR20020035874A/ko not_active Withdrawn
- 2000-09-21 WO PCT/EP2000/009248 patent/WO2001021843A1/de not_active Ceased
- 2000-09-21 AU AU74209/00A patent/AU7420900A/en not_active Abandoned
- 2000-09-21 JP JP2001525399A patent/JP2003510458A/ja not_active Withdrawn
- 2000-09-21 EP EP00962515A patent/EP1222315A1/de not_active Withdrawn
- 2000-09-21 CN CN00813272A patent/CN1376208A/zh active Pending
- 2000-09-21 CA CA 2388582 patent/CA2388582A1/en not_active Abandoned
-
2001
- 2001-04-22 ZA ZA200203151A patent/ZA200203151B/xx unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1010545B (de) * | 1953-11-28 | 1957-06-19 | Dingler Werke Ag | Beschickungsvorrichtung fuer Niederschachtoefen |
| DE1758842A1 (de) * | 1968-08-17 | 1971-01-14 | Krupp Gmbh | Beschickungseinrichtung,insbesondere fuer geschlossene Elektrooefen |
| EP0672881A1 (de) * | 1994-03-18 | 1995-09-20 | Nkk Corporation | Einschmelzofen mit einer Vorwärmeinrichtung |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA200203151B (en) | 2003-01-29 |
| JP2003510458A (ja) | 2003-03-18 |
| RO121037B1 (ro) | 2006-11-30 |
| DE19945489A1 (de) | 2001-04-05 |
| CN1376208A (zh) | 2002-10-23 |
| TR200200750T2 (tr) | 2002-09-23 |
| EA200200394A1 (ru) | 2002-10-31 |
| HUP0202808A2 (en) | 2002-12-28 |
| BR0014224A (pt) | 2002-05-21 |
| AU7420900A (en) | 2001-04-24 |
| CA2388582A1 (en) | 2001-03-29 |
| MXPA02003073A (es) | 2002-10-31 |
| EA003353B1 (ru) | 2003-04-24 |
| EP1222315A1 (de) | 2002-07-17 |
| KR20020035874A (ko) | 2002-05-15 |
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