EP2162246B1 - Kühlvorrichtung zum kühlen eines metallbandes - Google Patents

Kühlvorrichtung zum kühlen eines metallbandes Download PDF

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Publication number
EP2162246B1
EP2162246B1 EP08759198A EP08759198A EP2162246B1 EP 2162246 B1 EP2162246 B1 EP 2162246B1 EP 08759198 A EP08759198 A EP 08759198A EP 08759198 A EP08759198 A EP 08759198A EP 2162246 B1 EP2162246 B1 EP 2162246B1
Authority
EP
European Patent Office
Prior art keywords
metal strip
cooling
cooling device
plate
coolant
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.)
Active
Application number
EP08759198A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2162246A1 (de
Inventor
Dietrich Mathweis
Hartmut Pawelski
Hans-Peter Richter
Friedhelm Gieseler
Heiko Zetzsche
Stefan Tammert
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.)
SMS Siemag AG
Original Assignee
SMS Siemag AG
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 SMS Siemag AG filed Critical SMS Siemag AG
Priority to PL08759198T priority Critical patent/PL2162246T3/pl
Publication of EP2162246A1 publication Critical patent/EP2162246A1/de
Application granted granted Critical
Publication of EP2162246B1 publication Critical patent/EP2162246B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
    • 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
    • B21B1/22—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 plates, strips, bands or sheets of indefinite length
    • B21B1/24—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/28—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
    • 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
    • B21B1/22—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 plates, strips, bands or sheets of indefinite length
    • B21B1/30—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 plates, strips, bands or sheets of indefinite length in a non-continuous process
    • B21B1/32—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 plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
    • B21B1/36—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 plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by cold-rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0233—Spray nozzles, Nozzle headers; Spray systems

Definitions

  • the invention relates to a cooling device for cooling a metal strip after forming in a cold rolling mill.
  • the Japanese publication JP-60206516 discloses a cooling device which is arranged in a plurality of cooling units between the roller pairs, which is arranged along the conveying direction of the steel plate M and across the width of the steel plate.
  • the coolant heads are located above and below the thick steel plate M and consist of several nozzles at an angle of 30 to 75 degrees in the conveying direction.
  • a cooling device is also known for example from the Japanese publication JP 11129017 A1 basically known.
  • the cooling device disclosed therein comprises a plurality of nozzles, which are arranged below the metal strip to be cooled and in each case inject a coolant from a common tank at a right angle onto the underside of the metal strip. After a rectangular impact on the underside, the coolant initially deviates radially from the underside of the metal strip or is displaced radially on the underside until it falls back from the underside of the metal strip into the tank at some distance from the nozzle.
  • the radial displacement causes individual particles the sprayed cooling medium displaced with a movement component in the direction of the metal strip, while other particles are displaced with a component counter to the direction of the metal strip.
  • the invention has the object, further to form a known cooling device, a known use for the cooling device and a method for operating the known cooling device to the effect that the heat dissipation is much more effective and efficient.
  • the solution provides that a flat plate is provided, which is arranged in an operating position parallel to the surface of the metal strip in the outlet of the cold rolling mill; and in that the nozzle is arranged in the operating position for injecting the cooling medium at an acute spraying angle ⁇ with 10 ° ⁇ ⁇ ⁇ 20 ° into a cavity between the surface of the metal strip and the opposite plate with an injection direction against the running direction of the metal strip.
  • the present invention advantageously provides that an equal amount of the cooling medium allows a much greater heat transfer, ie a discharge of a larger amount of heat than was possible in the prior art; insofar the subject of the invention is more efficient than comparable prior art.
  • the claimed acute-angled impact of the cooling medium on the surface of the metal strip that the cooling medium is moved immediately after leaving the nozzle with a moving component against the direction of the metal strip.
  • the reflection losses occurring here at an acute angle are substantially lower than in the case of a vertical impact, and therefore the expansion of the coolant counter to the running direction on the surface of the metal strip, ie the effective cooling length, is considerably greater than in the prior art.
  • the inventively formed turbulent flow field in the cavity opposite to the direction of travel is much longer / deeper than in the prior art, whereby a much better heat transfer is achieved and more heat can be removed from the metal strip.
  • the claimed device is much more effective than the device known from the prior art.
  • the surfaces of the metal strip are advantageously also completely or at least partially freed from previously applied rolling emulsions.
  • demineralized water possibilities of media separation eg. B. between scaffolds with different emulsion loading, and the band cleaning.
  • the cooling device according to the invention is particularly advantageous to use in the outlet of scaffolding, where applied in the inlet only minimal amounts of lubricant to the tape be used to achieve a friction coefficient in the nip.
  • the rolling emulsion applied on the inlet side is largely consumed during rolling in the roll nip.
  • the remaining after the roller in the outlet on the surface of the metal strip emulsion residues are minimal and can be easily eliminated by the inventive device - almost in a side effect - with.
  • the use of minimum quantities of lubrication devices for targeted friction coefficient adjustment can be optimally utilized by belt cleaning and media separation.
  • the cooling device comprises a plurality of nozzles, which are preferably arranged in at least one nozzle bar transversely to the direction of the metal strip.
  • This arrangement of a plurality of nozzles advantageously a larger areal extent of the turbulent flow field is also achieved transversely to the strip running direction; its cooling effect is thereby further improved.
  • the nozzles are built into the plate.
  • the cooling device advantageously comprises a control device for controlling the cooling performance of the cooling device by suitably individually varying the pressure and / or the flow rate at which the cooling medium leaves the individual nozzles, the amount of cooling medium injected into the cavity the injection direction.
  • the claimed control or regulating device at any time allows an optimal desired temperature control of the metal strip during a rolling process.
  • the control is advantageously supported by a process model.
  • a three-dimensional adjustment of the spray direction of the cooling medium advantageously allows not only a variable adjustment of the acute spray angle ⁇ in a plane perpendicular to the plane of the metal strip, but also an adjustment of the azimuth angle ⁇ in a plane parallel to the plane of the metal strip.
  • the variable adjustment of the azimuth angle ⁇ is particularly advantageous for the nozzles in the edge region of the metal strip, because then can be achieved by adjusting the nozzle with an injection direction which is slightly inclined towards the center of the metal strip, the less coolant from the region of the metal strip is displaced and drains more or less unused.
  • the device may include a positioning device for variably positioning the plate in the operative position or a maintenance position outside of the strip.
  • the maintenance position is much more convenient for maintenance purposes, especially when the nozzles are integrated into the plate, than the operating position.
  • the maintenance or rest position is preferably approached automatically in the event of a fault or after completion of a rolling process. A disturbance of the rolling program is particularly present when a tape rupture has occurred, the z. B. is signaled by a signal of the falling strip tension. The retraction of the plate from the tape is then required to eliminate tape scrap.
  • the nozzles and the plate can be provided both opposite to the top of the metal strip as well as opposite to the underside of the metal strip.
  • the plate is slightly wider than the metal strip and has the plate at its edges parallel to the direction of the metal strip protruding edges, which the edges of the metal strip in the operating position - if also encompass a minimum distance.
  • These edges on the plates also counteract the problem described above that the cooling medium in the edge region to drain too fast and would not have a large cooling effect.
  • the edges meet the laterally draining water and thus contribute to an improved cooling performance of the cooling device.
  • the lateral flow-off of the cooling medium is particularly effectively prevented if the edges of a plate facing the upper side of the metal strip and the edges of a plate facing the underside of the metal strip overlap in the edge regions of the metal strip and, in particular, if there is still a seal between these edges is. Then, a lateral outflow of the cooling medium is advantageously completely prevented and the cooling medium can flow only in the rolling direction or against the rolling direction. The cooling effect is then particularly large.
  • the cooling device according to the invention advantageously also causes an expansion of the power spectrum of (cold) rolling mills, especially when used in conjunction with a reversing mill or as an intermediate stand cooling between two adjacent rolling mills of a rolling train.
  • the cooling device according to the invention allows a very effective cooling, that is, a strong cooling per unit time due to the functional principle described above. This strong cooling prevents the strip between the stitches is too warm and thus advantageously allows an increased rolling speed and / or a higher and / or faster consecutive stitch loss than in the prior art. In this way, the performance of the cold rolling mill is significantly increased.
  • FIG. 1 shows the outlet of a cold rolling stand 300 with a leaking to the left metal strip 200.
  • a plate 500 is arranged in the form of a transfer table.
  • a nozzle bar 110 with a plurality of individual nozzles 112 is arranged transversely to the running direction of the metal strip in the transfer table.
  • FIG. 2 Specifically, it can be seen that the nozzles in the transfer table are oriented so that they receive a cooling medium 400 at an acute spray angle ⁇ against the underside of the metal strip opposite its direction of travel L. squirt.
  • a cooling medium 400 at an acute spray angle ⁇ against the underside of the metal strip opposite its direction of travel L. squirt.
  • shearing forces act on the particles of the cooling medium involved, these shearing forces in the cooling medium causing the formation of a turbulent flow field.
  • the turbulent flow field is formed in a shallow cavity H between the underside of the metal strip 200 and the top of the transfer table 500.
  • the gap height S of this flat cavity H on the one hand must not be too small to direct contact of the metal strip 200 with the transfer table 500th to avoid.
  • the gap height S may not be too large, because the larger the gap height, the larger the required amount of cooling medium in order to achieve a desired cooling performance.
  • the cooling capacity of the cooling device according to the invention can be individually controlled by means of a control or regulating device 120 by each of the individual nozzles 112, the pressure or the flow velocity with which the cooling medium 400 leaves the individual nozzles, the amount of cooling medium and / or the three-dimensional injection direction R of the cooling medium is suitably adjusted or varied.
  • the efficiency and efficiency of the cooling device according to the invention can be further improved by the azimuth angle ⁇ at the nozzles 112-n in the center of the nozzle beam 110 being zero, but at the nozzles 112-1, 112-N near the edges of the nozzle Metal band is set non-zero. Concrete It is advisable to adjust the nozzles near the edges of the metal strip in such a way that the cooling medium is injected slightly towards the middle of the metal strip on its underside.
  • the cooling device according to the invention allows a cooling capacity of up to 30,000 W / m 2 K.
  • FIG. 3 shows the plates 500 according to the invention, each with a nozzle bar 110; This arrangement is also referred to below as a cooling cassette.
  • FIG. 3 shows a cooling cassette for the top of the metal strip 200, denoted by the additional I at the reference numeral, and a cooling cassette for the underside of the metal strip, denoted by the suffix II to the reference numerals.
  • Reference numerals 510-I and 510-II denote the edges at the edges of the plates.
  • the cooling cassettes associated with positioning devices 600-I and 600-II can be seen, which pivoting of the cooling cassettes from the in FIG. 3 shown maintenance or rest position in a later in FIG. 4 allow shown operating position and back.
  • FIG. 3 shows a cooling cassette for the top of the metal strip 200, denoted by the additional I at the reference numeral, and a cooling cassette for the underside of the metal strip, denoted by the suffix II to the reference numerals.
  • FIG. 4 shows the already mentioned operating position of the cooling cassettes 500-I, 500-II, in which the cooling cassettes or the plates are positioned parallel to the bottom and / or top of the rolled metal strip 200.
  • FIG. 5 shows a cross section through the cooling cassettes in the operating position. It can be seen that the lateral edges 510-I, 510-II of the upper and lower cooling cassettes enclose the metal band 200 at its edges. In this way, a lateral flow of cooling water is difficult, whereby the cooling effect of the cooling device is improved overall. By a seal 520 between the edges of the upper cooling cassette 500-I and the lower cooling cassette 500-II, the lateral flow-off of the cooling medium can even be completely prevented, whereby the cooling effect is maximized. The cooling water can then emerge only in the rolling direction or against the rolling direction from the frame formed by the cooling cassettes.
  • FIG. 6 shows the upper cooling cassette 500-I and the lower cooling cassette in the maintenance or rest position similar to in FIG. 3 but from a different perspective.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Metal Rolling (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
EP08759198A 2007-06-27 2008-06-12 Kühlvorrichtung zum kühlen eines metallbandes Active EP2162246B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08759198T PL2162246T3 (pl) 2007-06-27 2008-06-12 Urządzenie chłodzące do chłodzenia taśmy metalowej

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102007029802 2007-06-27
DE102007055475A DE102007055475A1 (de) 2007-06-27 2007-08-21 Kühlvorrichtung zum Kühlen eines Metallbandes
PCT/EP2008/004693 WO2009000421A1 (de) 2007-06-27 2008-06-12 Kühlvorrichtung zum kühlen eines metallbandes

Publications (2)

Publication Number Publication Date
EP2162246A1 EP2162246A1 (de) 2010-03-17
EP2162246B1 true EP2162246B1 (de) 2012-08-15

Family

ID=40092651

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08759198A Active EP2162246B1 (de) 2007-06-27 2008-06-12 Kühlvorrichtung zum kühlen eines metallbandes

Country Status (16)

Country Link
US (1) US8511126B2 (zh)
EP (1) EP2162246B1 (zh)
JP (1) JP5100826B2 (zh)
KR (1) KR101158327B1 (zh)
CN (1) CN101687236B (zh)
AU (1) AU2008267452B2 (zh)
BR (1) BRPI0810919A8 (zh)
CA (1) CA2683560C (zh)
DE (1) DE102007055475A1 (zh)
ES (1) ES2392001T3 (zh)
MX (1) MX2009011263A (zh)
PL (1) PL2162246T3 (zh)
RU (1) RU2414977C1 (zh)
TW (1) TWI412412B (zh)
WO (1) WO2009000421A1 (zh)
ZA (1) ZA200905997B (zh)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008027494A1 (de) * 2007-06-14 2008-12-18 Sms Demag Ag Mehrteilige Walze
US9174263B2 (en) * 2012-05-23 2015-11-03 Temper Ip, Llc Tool and shell using induction heating
CN102748933A (zh) * 2012-06-26 2012-10-24 中国重型机械研究院有限公司 一种热风吹扫装置
DE102012215599A1 (de) * 2012-09-03 2014-03-06 Sms Siemag Ag Verfahren und Vorrichtung zur dynamischen Versorgung einer Kühleinrichtung zum Kühlen von Metallband oder sonstigem Walzgut mit Kühlmittel
DE102012223848A1 (de) * 2012-12-19 2014-06-26 Sms Siemag Ag Vorrichtung und Verfahren zum Kühlen von Walzgut
EP2813298A1 (en) * 2013-06-10 2014-12-17 Centre de Recherches Métallurgiques asbl - Centrum voor Research in de Metallurgie vzw Method and device for enhanced strip cooling in the cold rolling mill
DE102013221710A1 (de) 2013-10-25 2015-04-30 Sms Siemag Aktiengesellschaft Aluminium-Warmbandwalzstraße und Verfahren zum Warmwalzen eines Aluminium-Warmbandes
DE202016008462U1 (de) 2016-11-22 2018-01-26 Sms Group Gmbh Kühlvorrichtung und Kühlanordnung zum Kühlen eines Metallbands sowie Kühlstrecke
DE102018205684A1 (de) * 2018-04-13 2019-10-17 Sms Group Gmbh Kühleinrichtung und Verfahren zu deren Betrieb
DE102019206596A1 (de) * 2019-03-06 2020-09-10 Sms Group Gmbh Vorrichtung zum Kühlen eines bandförmigen Produkts und Verfahren zum Betreiben einer solchen Vorrichtung
US20220349018A1 (en) * 2019-09-30 2022-11-03 Jfe Steel Corporation Metal-strip rapid cooling apparatus, metal-strip rapid cooling method, and method of producing metal strip product
CN112170493B (zh) * 2020-10-12 2024-06-14 山西陆业达冶金机械有限公司 一种轧制钢板卷取侧导梁喷淋装置

Family Cites Families (12)

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Publication number Priority date Publication date Assignee Title
EP0010966B1 (en) 1978-11-03 1982-10-06 DAVY McKEE (SHEFFIELD) LIMITED Tandem rolling mill
JPS591641A (ja) 1982-06-29 1984-01-07 Ishikawajima Harima Heavy Ind Co Ltd 浮遊帯状金属の冷却装置
JPS5944607U (ja) * 1982-09-16 1984-03-24 川崎製鉄株式会社 冷間圧延材の通板ガイド
JPS60206516A (ja) * 1984-03-30 1985-10-18 Nippon Steel Corp 厚鋼板の冷却装置
JPS61242715A (ja) * 1985-04-19 1986-10-29 Kawasaki Steel Corp ストリツプの冷却装置
JP3356283B2 (ja) * 1992-02-24 2002-12-16 アルキャン・インターナショナル・リミテッド 連続移動する金属ストリップの温度制御のために液体冷媒を適用および除去する方法および装置
JP3314721B2 (ja) 1997-08-27 2002-08-12 日本鋼管株式会社 冷間圧延における圧延潤滑油供給方法及びその装置
DE19935780A1 (de) 1999-07-29 2001-02-08 Siemens Ag Verfahren und Einrichtung zum Kühlen eines Metallbandes
WO2004014577A1 (ja) * 2002-08-08 2004-02-19 Jfe Steel Corporation 熱延鋼帯の冷却装置、熱延鋼帯の製造方法および熱延鋼帯の製造ライン
JP4586682B2 (ja) 2005-08-30 2010-11-24 Ｊｆｅスチール株式会社 鋼板の熱間圧延設備および熱間圧延方法
EP1992426B1 (en) 2006-03-03 2013-07-10 JFE Steel Corporation Cooling apparatus for hot rolled steel band and method of cooling the steel band
CN100430163C (zh) * 2006-09-30 2008-11-05 南京钢铁股份有限公司 高强度低合金钢轧后层流冷却水的侧喷吹扫系统

Also Published As

Publication number Publication date
WO2009000421A1 (de) 2008-12-31
CA2683560A1 (en) 2008-12-31
EP2162246A1 (de) 2010-03-17
KR20090122956A (ko) 2009-12-01
RU2414977C1 (ru) 2011-03-27
US20100132424A1 (en) 2010-06-03
BRPI0810919A8 (pt) 2017-05-09
US8511126B2 (en) 2013-08-20
AU2008267452A8 (en) 2010-03-25
BRPI0810919A2 (pt) 2016-07-19
JP5100826B2 (ja) 2012-12-19
MX2009011263A (es) 2009-11-05
AU2008267452A1 (en) 2008-12-31
TWI412412B (zh) 2013-10-21
TW200902179A (en) 2009-01-16
CN101687236A (zh) 2010-03-31
JP2010524697A (ja) 2010-07-22
DE102007055475A1 (de) 2009-01-08
PL2162246T3 (pl) 2013-01-31
AU2008267452B2 (en) 2011-03-31
CA2683560C (en) 2012-10-23
KR101158327B1 (ko) 2012-06-22
ZA200905997B (en) 2010-04-28
ES2392001T3 (es) 2012-12-03
CN101687236B (zh) 2012-12-05

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