EP0361058B1 - Installation avec four pour chauffer et réchauffer des feuillards - Google Patents

Installation avec four pour chauffer et réchauffer des feuillards Download PDF

Info

Publication number
EP0361058B1
EP0361058B1 EP89115168A EP89115168A EP0361058B1 EP 0361058 B1 EP0361058 B1 EP 0361058B1 EP 89115168 A EP89115168 A EP 89115168A EP 89115168 A EP89115168 A EP 89115168A EP 0361058 B1 EP0361058 B1 EP 0361058B1
Authority
EP
European Patent Office
Prior art keywords
furnace
strip
roller table
storage
further processing
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
EP89115168A
Other languages
German (de)
English (en)
Other versions
EP0361058A1 (fr
Inventor
Heinrich Patalon
Ernst Windhaus
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.)
Didier Ofu Engineering GmbH
Original Assignee
Didier Ofu Engineering 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 Didier Ofu Engineering GmbH filed Critical Didier Ofu Engineering GmbH
Publication of EP0361058A1 publication Critical patent/EP0361058A1/fr
Application granted granted Critical
Publication of EP0361058B1 publication Critical patent/EP0361058B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/68—Furnace coilers; Hot coilers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • F27B9/021—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces having two or more parallel tracks
    • F27B9/025—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces having two or more parallel tracks having two or more superimposed tracks
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
    • F27B9/2407—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor the conveyor being constituted by rollers (roller hearth furnace)

Definitions

  • the invention relates to a furnace installation according to the generic term according to claim 1.
  • a continuous caster usually forms and cuts the continuous casting into thin slabs or pre-strips, which are then brought to a specified inlet temperature (e.g. 1,100 ° C) for the rolling process or another processing process in a heating furnace system and fed to the corresponding plant .
  • a specified inlet temperature e.g. 1,100 ° C
  • the continuous casting installation In the event of malfunctions on and in the further processing plant, for example the rolling mill, the continuous casting installation must continue to work, so that, in the worst case, at least the ladle content already in the casting process can still be poured. This results in the need to temporarily store the continuous casting sections, such as thin slabs and pre-strips.
  • the invention has for its object to provide an economically and rationally operating furnace system with which interruptions on and in the rolling mill or in further processing can be compensated for with the least possible effort and energy and time loss at least until the casting ladle which is already in the casting process is completely emptied .
  • the furnace system is designed in accordance with claim 2, as a result of which in particular the space required for the storage furnace or furnaces can be kept relatively low.
  • the furnace system is advantageously equipped according to claim 3. This system also guarantees a direct conveying path from the storage furnace through the heating furnace for further processing without any special effort.
  • the proposal according to claim 4 serves to ensure that, in the event of a malfunction in the rolling process, the continuous casting process never has to be interrupted until the pouring ladle which is already in operation is emptied.
  • FIG. 1 and 2 show an oven system which is connected behind a continuous casting mold 10 of a continuous casting machine, not shown, and its take-off rollers 11 with a horizontal roller table 12 and a flying cutting device 13.
  • the furnace system contains a roller-hearth heating furnace 14 and two storage furnaces 15.
  • the roller hearth system of the heating furnace 14 contains two stacked roller tables 16 and 17, the conveyor rollers of which, as can be seen from FIG. 3, are mounted on both sides outside the furnace chamber 18 and, guided and moved laterally by their drive devices, through openings in the two furnace side walls into the furnace chamber 18 retractable and retractable from it.
  • the upper roller table 16 can only be driven in the direction of entry in order to transport the section separated from the continuous casting as heating material 20 (preliminary strip, thin slab) into the heating furnace 14.
  • the conveyor rollers of the lower roller table 17 arranged below are reversible, that is to say they can be driven both in the same direction of rotation as the upper roller table 16 and in the opposite direction of rotation.
  • the conveyor rollers of both roller tables 16 and 17 are arranged exactly above one another with sufficient gaps. Within these gaps, the lifting hearth benches 19 can be moved vertically in the direction of the double arrow in a suitable number. This vertical movement of the lifting hearth benches 19 extends from its lowest position below the working level of the lower roller table 17 to over the working level of the upper roller table 16 such that the conveyor rollers to be introduced from the outside into the furnace chamber 18 of one or the other roller table 16 or 17 are each below the overlying heating goods 20 can be moved into and out of the spaces between the lifting hearth benches 19.
  • a coil winding device 21 is arranged in the working plane of the lower roller table 17, which is designed both for winding the strip-shaped heating material pieces 20 into easily storable coils 22 and for unwinding them after their storage time, around the heating material pieces 20 to be able to insert it again as a stretched opening strip into the heating and rolling process via the lower roller table 17.
  • a storage furnace 15 in the manner of a bell-type furnace with a plurality of chambers accommodating the coils 22 is arranged on rails 23 on both sides.
  • the preliminary strip 20 is brought to the required drawing or rolling temperature in this position.
  • all the conveyor rollers of the upper roller table 16 are retracted into the furnace chamber 18 in time to accommodate the new preliminary strip 20.
  • the lower roller table 17 now also moves from the outside with its conveyor rollers into the furnace chamber 18 between the lifting hearth benches 19.
  • the lifting hearth 19 then moves slowly down and gently places the preliminary strip 20 on the lower roller table 17. This then runs forward with undisturbed rolling operation and conveys the correctly reheated pre-strip 20 to the first stand of the rolling mill.
  • its conveyor rollers are moved out of the furnace chamber 18 into the open again until the subsequent preliminary belt 20 has the desired temperature.
  • the last-mentioned conveying movement of the lower roller table 17 is not carried out in the direction toward the rolling mill, but by a reversing circuit to the rear to the coil winder 21, which produces a coil 22 from the preliminary strip 20.
  • One of the movable hood furnaces 15 travels with an empty chamber at the level of the coil winder 21 for its absorption and heat storage. These processes are repeated until the malfunction in the rolling mill has been rectified or until the ladle in operation has been emptied.
  • the coils 22 are initially unwound again one after the other to stretch pre-strips 20 and, via the lower roller table 17, again positioned in the heating furnace 14 for mostly brief reheating on the lifting hearth benches 19.
  • the pre-strips 20 can be fed to the further processing in a relatively rapid sequence. Continuous casting is continued in good time during the last heating processes, so that there is practically no interruption.
  • each oven hearth advantageously has a maximum of only four cross tractor slots, in such a way that both the storage and the emptying of the storage furnaces are carried out by the same cross tractor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Tunnel Furnaces (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Claims (6)

  1. Installation avec four pour chauffer et réchauffer des feuillards (20) par exemple des feuillards ébauchés ou des brames minces avec un four pour réchauffer (14) et au moins un four à accumulation (15) pour les feuillards (20), le four pour réchauffer (14) contenant un système de rouleaux et de soles de levage ( 16, 17, 19) avec rouleaux de transport (16, 17) qui sont logés à l'extérieur du foyer du four (18) et peuvent être rentrés et sortis dans des espaces intermédiaires des soles de levage (19) par des ouvertures aménagées dans les parois latérales du four et avec des soles de levage (19) qui peuvent être soulevées entre les rouleaux de transport (16, 17) de leur position au-dessous de leur surface de travail jusqu'au-dessus de leur surface de travail
    caractérisée par le fait
    que les rouleaux de transport sont répartis sur deux trains à rouleaux (16, 17) ordonnés l'un au-dessus de l'autre et dont le train supérieur (16) peut être commandé dans le sens d'admission et prend les feuillards (20) qui sont admis tandis que le train inférieur (17) est à commande réversible dans le plan duquel sur l'une des faces avant du four à réchauffer (14) sont ordonnés le four à accumulation (15) ainsi que les dispositifs (15, 21) pour l'emmaganisage des feuillards (20) et de l'autre côté du four à réchauffer (14) les dispositifs d'admission pour le traitement ultérieur des feuillards (20).
  2. Installation avec four selon la revendication 1
    caractérisée par le fait
    que les dispositifs d'emmagasinage comprennent au moins un dispositif de bobinage (21) au moyen duquel le matériau à feuillards (20) peut être embobiné en bobines (22) et débobiné sous formes de feuillards allongés (20) et qu'au moins un four à accumulation (15) qui peut être amené respectivement dans une position de prise et dans une position de sortie pour la bobine respective est affecté à ce dispositif de bobinage (21).
  3. Installation avec four selon la revendication 1
    caractérisée par le fait
    que les dispositifs d'emmagasinage comprennent au moins un four à accumulation prenant les feuillards allongés (20) et relié au train de rouleaux inférieur (17) du four à chauffer (14) via un train de transport déplaçant les feuillards (20) en sens longitudinal et en sens transversal.
  4. Installation avec four selon l'une des revendications 1 à 3
    caractérisée par le fait
    que la capacité d'accumulation des fours à accumulation (15) correspond au moins au contenu de la poche de coulée converti dans les feuillards (20).
  5. Mode de fonctionnement de l'installation avec four selon les revendications 1 et 2
    caractérisé par le fait
    que les feuillards (20) sont envoyés sur les rouleaux de transport du train de rouleaux supérieur (16) lesquels ont été amenés dans le foyer du four (18) et pris ensuite par les soles de levage soulevées; lorsque les rouleaux de transport supérieurs (16) sont sortis, ceux-ci baissent les feuillards (20) qui sont alors réchauffés à la température nécessaire pour être ensuite posés sur les rouleaux de transport inférieurs du train de rouleaux (17) qui ont été amenés dans le foyer du four (18), le train de rouleaux transportant les feuillards, selon les besoins, soit vers l'avant par la sortie du four en vue du traitement ultérieur soit, en cas de panne, dans le sens contraire vers la bobineuse (21) pour l'embobinage et l'emmagasinage dans le four à accumulation (15) et que la bobine (22) après l'élimination de la panne est débobinée par la bobineuse (21), réintroduite en bande allongée dans le four à chauffer (14) via le train de rouleaux inférieur (17) et étendue sur les bancs de la sole de levage pour être réchauffée à la température nécessaire au traitement d'où est elle envoyée par la sortie à l'installation de traitement.
  6. Mode de fonctionnement selon les revendications 1 et 3
    caractérisé par le fait
    que les feuillards (20)sont envoyés sur les rouleaux de transport du train de rouleaux supérieurs (16) amenés dans le foyer du four et pris ensuite par les soles de levage soulevées (19) qui, lorsque les rouleaux de transport supérieurs (16) sont sortis baissent les feuillards (20) qui sont alors réchauffés à la température nécessaire pour être posés ensuite sur les rouleaux de transport du train à rouleaux inférieur (17) entrés dans le foyer du four, le train de rouleaux transportant les feuillards (20), selon les besoins, soit vers la sortie du four en vue du traitement soit, en cas de panne, dans le sens opposé en bande allongée jusqu'à la hauteur du four à accumulation où un dispositif de transport transversal partant du four à accumulation est intégré dans le train de rouleaux, ce dispositif tirant les feuillards (20) transversalement au sens longitudinal dans le four d'accumulation et le posant sur les bancs de la sole d'où les feuillards (20) sont renvoyés en vue du traitement ultérieur va le même dispositif de tansport transversal et le train de rouleaux inférieur (17) sur la sole de levage (19) pour être réchauffés et introduits dans le process de traitement.
EP89115168A 1988-09-03 1989-08-16 Installation avec four pour chauffer et réchauffer des feuillards Expired - Lifetime EP0361058B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3830027A DE3830027A1 (de) 1988-09-03 1988-09-03 Ofenanlage zum waermen bzw. nachwaermen von bandfoermigem waermgut
DE3830027 1988-09-03

Publications (2)

Publication Number Publication Date
EP0361058A1 EP0361058A1 (fr) 1990-04-04
EP0361058B1 true EP0361058B1 (fr) 1993-03-31

Family

ID=6362260

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89115168A Expired - Lifetime EP0361058B1 (fr) 1988-09-03 1989-08-16 Installation avec four pour chauffer et réchauffer des feuillards

Country Status (3)

Country Link
EP (1) EP0361058B1 (fr)
DE (2) DE3830027A1 (fr)
ES (1) ES2040424T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4416235A1 (de) * 1994-05-07 1995-11-09 Iob Ind Ofen Bau Gmbh Fertigungsanlage, mit Gießmaschinen und einem Glühofen, mit einer Pufferstrecke zur kontinuierlich/diskontinuierlichen Fertigung von Schleudergußrohren
AT506603B8 (de) 2008-04-04 2010-03-15 Siemens Vai Metals Tech Gmbh Verfahren und vorrichtung für eine giess-walz-verbundanlage
CN101851702B (zh) * 2010-06-09 2011-12-07 五力机电科技（昆山）有限公司 螺旋道钉感应加热装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8422609D0 (en) * 1984-09-07 1984-10-10 Davy Mckee Sheffield Metal strip
ATE46463T1 (de) * 1986-10-13 1989-10-15 Schloemann Siemag Ag Herstellung von warmgewalztem stahlband aus stranggegossenen brammen.
DE3736674C1 (en) * 1987-10-29 1989-01-26 Didier Eng Method and furnace for heating slabs, ingots, billets, sheets and similar products
DE3740619C1 (en) * 1987-12-01 1988-12-22 Didier Eng Heating furnace for a roughed-strip casting installation

Also Published As

Publication number Publication date
DE3830027A1 (de) 1990-03-15
EP0361058A1 (fr) 1990-04-04
ES2040424T3 (es) 1993-10-16
DE58903946D1 (de) 1993-05-06
DE3830027C2 (fr) 1990-07-05

Similar Documents

Publication Publication Date Title
DE4224071A1 (de) Waffelblockmagazin zum kurzzeitigen zwischenlagern von waffelbloecken
DE60004223T2 (de) Integrierte anlage zur herstellung von walzgut
DE3141476C2 (de) Stapelmaschine zum verschachtelten Stapeln von profilierten Walzstäben
EP0347662B1 (fr) Installation de coulée continue de feuillard avec un four rotatif
DE60035571T2 (de) Kontinuierliche herstellungsanlagen für draht
DE2712279C2 (de) Einrichtung zur Wärmebehandlung von zu behandelndem Gut, wie gegossenen Strängen und Barren, sowie Blöcken, Stangen, Rohren und dgl. insbesondere aus Aluminium- oder Magnesiumlegierungen
EP0361058B1 (fr) Installation avec four pour chauffer et réchauffer des feuillards
DE1296578B (de) Vorrichtung zum Stapeln von Walzstahlprofil-Staeben
DE69011534T2 (de) System zur handhabung dünnen materials zur anwendung in wickelmaschinen und dergleichen.
DE3708050C2 (fr)
EP0313726B1 (fr) Procédé et four pour le chauffage de brames, billettes, lingots, tôles, bandes d'acier et de charges similaires
DE3935075A1 (de) Verfahren und vorrichtung zum biegen und anlassen von zu laminierenden glasschichten
DE2727232A1 (de) Vorrichtung und verfahren zur kontinuierlichen behandlung von metallwickeln u.dgl.
AT396559B (de) Brammen-stranggiessanlage mit nachgeordnetem walzwerk
CH409756A (de) Steinstapel und Verfahren zum Erstellen desselben und Setzmaschine zur Ausübung des Verfahrens
DE3030382A1 (de) Verfahren und einrichtung zum heisswalzen von metallwerkstuecken zu baendern oder platten
DE1433911A1 (de) Anlage zum Haerten von Formlingen
DE2917027A1 (de) Verfahren und einrichtung zum foerdern von aufeinanderfolgenden heissen wicklungen
DE3307248C2 (de) Ofen zum Wärmen von Brammen, Knüppeln oder dergleichen Wärmgut
DE3832004C1 (fr)
CH605345A5 (en) Sheet metal treatment plant and handling layout
DE3031825C2 (de) Vorrichtung zum Übergeben von zu Bunden gewickelten Metallbändern
DE4344094C1 (de) Zweistrangige Dünnbrammengießanlage mit Aufwickelvorrichtung
DE4333717C1 (de) Einrichtung zum Transportieren und Speichern von aus Dünnbrammen gewalzten und gewickelten Vorbändern
DE1459238C (de) Autoklav zum beschleunigten Abbinden von auf der Basis von Zement hergestell ten Formungen

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: 19890829

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE ES SE

17Q First examination report despatched

Effective date: 19920722

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

Owner name: DIDIER OFU ENGINEERING GMBH

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE ES SE

REF Corresponds to:

Ref document number: 58903946

Country of ref document: DE

Date of ref document: 19930506

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2040424

Country of ref document: ES

Kind code of ref document: T3

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
EAL Se: european patent in force in sweden

Ref document number: 89115168.0

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

Ref country code: BE

Payment date: 19960716

Year of fee payment: 8

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

Ref country code: SE

Payment date: 19960718

Year of fee payment: 8

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

Ref country code: ES

Payment date: 19960809

Year of fee payment: 8

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: 19970817

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

Ref country code: ES

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 19970818

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: 19970831

BERE Be: lapsed

Owner name: DIDIER OFU ENGINEERING G.M.B.H.

Effective date: 19970831

EUG Se: european patent has lapsed

Ref document number: 89115168.0

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20010201

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

Ref country code: DE

Payment date: 20040805

Year of fee payment: 16

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: 20060301