EP1029088B1 - Dispositif d'extraction pour four a cuve - Google Patents

Dispositif d'extraction pour four a cuve Download PDF

Info

Publication number
EP1029088B1
EP1029088B1 EP98961102A EP98961102A EP1029088B1 EP 1029088 B1 EP1029088 B1 EP 1029088B1 EP 98961102 A EP98961102 A EP 98961102A EP 98961102 A EP98961102 A EP 98961102A EP 1029088 B1 EP1029088 B1 EP 1029088B1
Authority
EP
European Patent Office
Prior art keywords
shaft furnace
conveying
sections
section
shaft
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.)
Expired - Lifetime
Application number
EP98961102A
Other languages
German (de)
English (en)
Other versions
EP1029088A1 (fr
Inventor
Martin Schmidt
Herbert Lassnig
Johann Wurm
Kurt Wieder
Georg Aichinger
Josef Ziegler
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.)
Deutsche Voest Alpine Industrieanlagenbau GmbH
Original Assignee
Voest Alpine Industrienlagenbau GmbH
Deutsche Voest Alpine Industrieanlagenbau 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 Voest Alpine Industrienlagenbau GmbH, Deutsche Voest Alpine Industrieanlagenbau GmbH filed Critical Voest Alpine Industrienlagenbau GmbH
Publication of EP1029088A1 publication Critical patent/EP1029088A1/fr
Application granted granted Critical
Publication of EP1029088B1 publication Critical patent/EP1029088B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft 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
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/21—Arrangements of devices for discharging
    • 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
    • F27D3/08—Screw feeders; Screw dischargers

Definitions

  • the invention relates to a shaft furnace, in particular a direct reduction shaft furnace, with a bed of lumpy material, in particular iron oxide and / or sponge iron containing lumpy good, with the casing of the shaft furnace penetrating Screw conveyors for the discharge of the lumpy goods from the shaft furnace, which over the Bottom region of the shaft furnace are arranged and stored in the casing of the shaft furnace.
  • a shaft furnace in particular a direct reduction shaft furnace
  • a bed of lumpy material in particular iron oxide and / or sponge iron containing lumpy good
  • Shaft furnaces in particular reduction shaft furnaces of the type described above, are numerous known from the prior art.
  • One such, essentially as a cylindrical hollow body trained shaft furnace generally contains a bed of iron oxide and / or Lumpy material containing sponge iron, the material containing iron oxide in the upper part of the shaft furnace is abandoned.
  • a reducing gas originating, for example, from a melter gasifier is introduced into the Shaft furnace and thus blown into the solid bed.
  • the hot dust-laden Reducing gas flows upwards through the solid bed and thereby reduces this Partial or partial iron oxide to form sponge iron.
  • the fully or partially reduced iron oxide is between the bottom of the Discharge devices arranged in the shaft furnace and the area of the gas inlet openings conveyed out of the shaft furnace.
  • These discharge devices are usually called Star-shaped, radial (based on the shaft furnace) conveying screw conveyors educated.
  • the zone in the area of the shaft floor in which the discharge devices are located should have a maximum of active discharge area, on the one hand as possible to achieve even lowering of the bulk material, furthermore one should continuous movement of the goods in the reaction zone can be guaranteed.
  • the requirement for a maximum of active discharge area is a star-shaped one Arrangement of screw conveyors only fulfilled if each of the screw conveyors is above theirs pulls material from the fill evenly over the entire length of the shaft and transported away.
  • the conveyor cross section of existing screw conveyors is designed that in each section of a screw conveyor both the removal of material from Sections upstream of the conveying direction, as well as the removal of bulk material from the the area surrounding the respective section would have to be managed. This takes place in the Usually by increasing the radius of the conveyor continuously increasing in the direction of conveyance Paddle or spiral envelopes. In addition, an increasing slope of the Screw flow in the conveying direction, the delivery volume of each screw section is constant enlarged.
  • the object of the present invention is therefore a shaft furnace, in particular to provide a direct reduction shaft furnace, which due to the used therein Screw conveyors an improved, more uniform discharge of the bulk material has, than using shaft furnaces known from the prior art conventional screw conveyors.
  • the area forming the snail head has no area To promote material from upstream sections. So he has the entire capacity free for the material withdrawal from the filling.
  • the shaft cantilevered trigger area divided into two or more such sections.
  • An essential one The criterion when choosing the number of sections is the respective increase in the Funding cross section. With increasing number of sections or decreasing increase in Conveying cross-sections approximate the shape of the screw and thus the conveying characteristics to that the screw with a continuously increasing cross-section.
  • the end of the section should be a moderate slope with respect to the longitudinal axis of the screw conveyor of at least 45 °, preferably of at least 60 °, particularly preferably of im have substantially 90 °.
  • the volatile ones Increases in the conveying cross sections in the circumferential direction of the conveying cross sections against each other staggered, preferably evenly distributed, with the trigger area in is divided into at least three sections.
  • the conveyor cross sections are within individual Sections of a screw conveyor kept constant. This embodiment is production-technically particularly easy to implement.
  • the conveying cross sections are inside individual sections of a screw conveyor continuously increasing.
  • This Variant combines the advantages of conventional with those of the invention Screw conveyors, i.e. continuously increasing funding cross-sections with areas combined delivery capacity combined.
  • the screw surfaces of the screw conveyors are on the shafts of the Conveyor-mounted paddles are formed.
  • the screw surfaces also over the entire screw length can be formed continuously, are formed by paddles Screw surfaces easier to manufacture. In the event of a repair, paddles can also can be exchanged much easier.
  • this preferred embodiment is accomplished in that for example when using paddles from two neighboring, different ones Sections associated paddling, the second, for example, three times the middle Grain size is larger than the first. With an average grain size of, for example, 20 mm these two paddles differ in height by 60 mm.
  • the slope of the Screw flight each a screw conveyor in the conveying direction in a manner known per se increasing or initially kept constant in the conveying direction and subsequently increasing, executed.
  • the volume conveyable by the screw conveyor is in Direction of conveyance increased, so that the invention increases from the bed removed material is actually removed from the shaft furnace.
  • Fig. 1 shows a shaft furnace 1 according to the invention with the bed 2 pieces and good the conveyor screws 3 for the discharge of the lumpy goods from the shaft furnace 1.
  • bustle zone 4 along the casing of the shaft furnace of gas inlet openings through which a reducing gas is blown into the bed 2 becomes.
  • the one in the Discharge area 5 of each screw conveyor 3 which is cantilevered is divided into three sections, the conveying cross sections of the individual sections in the conveying direction, that is in the direction of Wall of shaft furnace 1, increase by leaps and bounds.
  • Fig. 2 and Fig. 3 are two different embodiments of the Screw conveyors 3 shown.
  • Fig. 2 shows a screw conveyor 3 in cross section, the Conveying part, that is, the extraction area 5 projecting into the shaft, in the form of a paddle 6 formed, interrupted worm gear is formed.
  • the trigger area 5 is in three Sections 7,8,9 divided, with the paddle height around adjacent section ends increased three times the average grain size of the lumpy material to be conveyed. Within of the individual sections 7, 8, 9 the paddle height and thus the conveying cross section is constant held.
  • the screw conveyor 3 shown in FIG. 3 differs from that shown in FIG. 2 in that the height of the paddle 6 within individual sections in the conveying direction is continuously increasing. Only at the transition from one section to the next the paddle height experiences an abrupt change in the extent of three times the middle Grain size of the lumpy good.
  • FIG. 4a to 4c show a comparison of the section-related conveying characteristics conventional screw conveyors and those with an abruptly increasing conveyor cross-section.
  • the delivery rate of a conventional screw conveyor (Fig. 4a) is at the screw head (1st chamber) and near the wall of the shaft furnace (5th chamber) much higher than in middle areas (2nd - 4th chamber) of the screw conveyor.
  • a division of the Screw conveyor in two sections with different conveyor cross-section results in an increase in the conveying capacity in the area of increasing the conveying cross section (3rd chamber). Only a division into three sections brings about a large part of the Deduction range constant flow rate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Organic Chemistry (AREA)
  • Screw Conveyors (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Tunnel Furnaces (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Manufacture Of Iron (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Gear Transmission (AREA)

Claims (10)

  1. Four à cuve (1), en particulier four à cuve de réduction directe, avec une charge (2) de matières en morceaux, en particulier de matières en morceaux contenant de l'oxyde de fer et/ou de l'éponge de fer, avec des vis transporteuses (3) traversant l'enceinte du four à cuve pour l'extraction des matières en morceaux hors du four à cuve, qui sont disposées au-dessus de la zone de fond du four à cuve (1) et qui sont supportées dans l'enceinte du four à cuve (1), caractérisé en ce que la région d'extraction (5) de chaque vis transporteuse (3) pénétrant dans la cuve est divisée dans le sens de la longueur en au moins deux sections voisines, dans lesquelles les sections transversales de transport de fins de sections voisines augmentent par paliers dans le sens du transport.
  2. Four à cuve (1) suivant la revendication 1, caractérisé en ce que l'augmentation étagée de la section transversale de transport dans la région de fins de sections associées l'une à l'autre présente - par rapport à l'axe longitudinal de la vis. transporteuse (3) - une pente moyenne d'au moins 45°, de préférence d'au moins 60°.
  3. Four à cuve (1) suivant la revendication 2, caractérisé en ce que l'augmentation étagée de la section transversale de transport dans le sens du transport présente une pente de sensiblement 90°.
  4. Four à cuve (1) suivant l'une quelconque des revendications 1 à 3, caractérisé en ce que la région d'extraction (5) de chaque vis transporteuse (3) pénétrant dans la cuve présente en direction longitudinale au moins trois sections voisines, dans lesquelles les augmentations étagées des sections transversales de transport sont décalées l'une par rapport à l'autre dans le sens périphérique des sections transversales de transport, de préférence avec une répartition uniforme.
  5. Four à cuve (1) suivant l'une quelconque des revendications 1 à 4, caractérisé en ce que les sections transversales de transport sont maintenues constantes à l'intérieur de sections individuelles de chacune des vis transporteuses (3).
  6. Four à cuve (1) suivant l'une quelconque des revendications 1 à 5, caractérisé en ce que les sections transversales de transport augmentent en continu dans le sens du transport à l'intérieur de sections individuelles de chacune des vis transporteuses (3).
  7. Four à cuve (1) suivant l'une quelconque des revendications 1 à 6, caractérisé en ce que les faces hélicoïdales des vis transporteuses (3) sont formées par des palettes (6) montées sur les arbres des vis transporteuses.
  8. Four à cuve (1) suivant l'une quelconque des revendications 1 à 7, caractérisé en ce que l'augmentation de la section transversale de transport de fins de sections voisines d'une vis transporteuse (3) est formée par un accroissement du rayon de la section transversale de transport à raison de deux à huit fois, de préférence de deux à six fois la taille moyenne des grains des matières en morceaux.
  9. Four à cuve (1) suivant la revendication 8, caractérisé en ce que la région d'extraction de chaque vis transporteuse (3) pénétrant dans la cuve est divisée en trois sections voisines, l'augmentation du rayon de la section transversale de transport de fins de sections voisines valant environ trois à quatre fois la taille moyenne des grains des matières en morceaux.
  10. Four à cuve (1) suivant l'une quelconque des revendications 1 à 9, caractérisé en ce que la pente des spires de vis de chacune des vis transporteuses (3) est maintenue constante et/ou est croissante dans le sens du transport.
EP98961102A 1997-11-07 1998-10-26 Dispositif d'extraction pour four a cuve Expired - Lifetime EP1029088B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT189297 1997-11-07
AT0189297A AT405455B (de) 1997-11-07 1997-11-07 Schachtofen
PCT/EP1998/006794 WO1999024626A1 (fr) 1997-11-07 1998-10-26 Dispositif d'extraction pour four a cuve

Publications (2)

Publication Number Publication Date
EP1029088A1 EP1029088A1 (fr) 2000-08-23
EP1029088B1 true EP1029088B1 (fr) 2001-10-04

Family

ID=3523275

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98961102A Expired - Lifetime EP1029088B1 (fr) 1997-11-07 1998-10-26 Dispositif d'extraction pour four a cuve

Country Status (17)

Country Link
US (1) US6280181B1 (fr)
EP (1) EP1029088B1 (fr)
JP (1) JP2001522937A (fr)
KR (1) KR100557232B1 (fr)
CN (1) CN1090680C (fr)
AT (1) AT405455B (fr)
AU (1) AU735530B2 (fr)
BR (1) BR9812775A (fr)
CA (1) CA2308388A1 (fr)
DE (1) DE59801664D1 (fr)
PL (1) PL340872A1 (fr)
RU (1) RU2194770C2 (fr)
SK (1) SK6672000A3 (fr)
TR (1) TR200001243T2 (fr)
TW (1) TW406178B (fr)
WO (1) WO1999024626A1 (fr)
ZA (1) ZA9810170B (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6429481B1 (en) 1997-11-14 2002-08-06 Fairchild Semiconductor Corporation Field effect transistor and method of its manufacture
AT505490B1 (de) 2007-06-28 2009-12-15 Siemens Vai Metals Tech Gmbh Verfahren und vorrichtung zur erzeugung von eisenschwamm
CN102620552B (zh) * 2012-04-01 2013-03-20 云南祥云中天锑业有限责任公司 一种用于锑氧粉冶炼的立式挥发炉
CN102925614A (zh) * 2012-11-22 2013-02-13 中冶赛迪工程技术股份有限公司 一种竖炉排料装置
CN103408232A (zh) * 2013-08-21 2013-11-27 山东省聚祥窑炉有限公司 一种立式石灰窑窑门
CN111910037B (zh) * 2020-08-07 2022-01-25 唐山中科乾海环保科技有限公司 竖炉直接还原装置及其排料方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1557773A (en) * 1922-04-03 1925-10-20 Efficiency Mfg Co Fuel-feeding apparatus
US3704011A (en) * 1971-08-12 1972-11-28 Mintech Corp Discharge mechanism for shaft kiln
AT372109B (de) * 1982-01-11 1983-09-12 Voest Alpine Ag Vorrichtung zum austragen von heissem gut, insbesondere von eisenschwamm aus einem schachtofen
DE4116215A1 (de) 1991-05-17 1992-11-19 Hilti Ag Trommelfoermige transporteinrichtung
AT397378B (de) * 1992-07-07 1994-03-25 Voest Alpine Ind Anlagen Fördereinrichtung zum dosierten fördern von schüttgut

Also Published As

Publication number Publication date
KR100557232B1 (ko) 2006-03-07
CN1278305A (zh) 2000-12-27
TR200001243T2 (tr) 2000-11-21
BR9812775A (pt) 2000-10-10
AU1664399A (en) 1999-05-31
RU2194770C2 (ru) 2002-12-20
SK6672000A3 (en) 2000-11-07
CN1090680C (zh) 2002-09-11
ZA9810170B (en) 1999-05-07
PL340872A1 (en) 2001-03-12
DE59801664D1 (de) 2001-11-08
CA2308388A1 (fr) 1999-05-20
US6280181B1 (en) 2001-08-28
TW406178B (en) 2000-09-21
AU735530B2 (en) 2001-07-12
KR20010031825A (ko) 2001-04-16
ATA189297A (de) 1998-12-15
EP1029088A1 (fr) 2000-08-23
JP2001522937A (ja) 2001-11-20
WO1999024626A1 (fr) 1999-05-20
AT405455B (de) 1999-08-25

Similar Documents

Publication Publication Date Title
EP1029088B1 (fr) Dispositif d'extraction pour four a cuve
EP0074076B1 (fr) Silo, en particulier pour matières en vrac s'écoulant difficilement
CH652968A5 (de) Vorrichtung zum extrudieren von futtermaische.
DE2840660C2 (fr)
CH674474A5 (fr)
EP1434679B2 (fr) Extrudeuse annulaire a elements de refoulement a contreforts partiels dans la zone d'alimentation
DE2736349A1 (de) Prallmuehle
CH318547A (de) Knetpumpe zur Bearbeitung und Förderung von plastischen Massen
AT405332B (de) Schachtofen
DE2905665C2 (de) Schneckenförderer
EP0098340A1 (fr) Pompe à hélice dont l'arbre est supporté à ses deux extrémités
EP0093975A1 (fr) Dispositif pour la fabrication de la glace rompue
AT391425B (de) Innenauskleidung fuer zylindrische kugelmuehlen
EP1017859B1 (fr) Procede de production de fer spongieux
EP0004081B1 (fr) Refroidisseur à cuve
AT406299B (de) Vorrichtung zum austragen bzw. durchmischen von stückigem gut
EP0472027B1 (fr) Surface de grille
DE3609244A1 (de) Mischsilo fuer schuettgut
DE3624885A1 (de) Entleerungseinrichtung fuer ein schuettgut-silo
EP0311686A1 (fr) Broyeur a boulets
AT405765B (de) Vorrichtung zum austragen von stückigem gut
EP1105542B1 (fr) Four vertical
DE1289490B (de) Silozellen in Zwillingsbauart fuer mehliges und anderes, insbesondere schwerfliessendes Gut
WO1998040294A1 (fr) Dispositif pour fluidiser et transporter des materiaux a grain fin pulverulents ou a fibres courtes dans un flexible, un tuyau ou un recipient
DE3412216A1 (de) Vorrichtung zum vereinzeln und dosieren von leichtem fasergut

Legal Events

Date Code Title Description
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

17P Request for examination filed

Effective date: 20000413

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE FR GB IT LU NL SE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: DEUTSCHE VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 20010117

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE FR GB IT LU NL SE

REF Corresponds to:

Ref document number: 59801664

Country of ref document: DE

Date of ref document: 20011108

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20011218

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20020925

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20020926

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20020930

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20021002

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20021009

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031026

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031027

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031031

BERE Be: lapsed

Owner name: DEUTSCHE *VOEST-ALPINE INDUSTRIEANLAGENBAU G.M.B.H

Effective date: 20031031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040501

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20031026

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040630

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20040501

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051026

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 20121023

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20121216

Year of fee payment: 15

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59801664

Country of ref document: DE

Effective date: 20140501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20131026