EP2145033A1 - Installation et procede pour le traitement de solutions de decapage de bandes d'acier au silicium - Google Patents
Installation et procede pour le traitement de solutions de decapage de bandes d'acier au siliciumInfo
- Publication number
- EP2145033A1 EP2145033A1 EP08749169A EP08749169A EP2145033A1 EP 2145033 A1 EP2145033 A1 EP 2145033A1 EP 08749169 A EP08749169 A EP 08749169A EP 08749169 A EP08749169 A EP 08749169A EP 2145033 A1 EP2145033 A1 EP 2145033A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pickling
- filtration
- tank
- silica
- filter
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
- C23G3/021—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously by dipping
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/36—Regeneration of waste pickling liquors
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
- C23G3/027—Associated apparatus, e.g. for pretreating or after-treating
Definitions
- the invention generally relates to the etching of hot - rolled silicon steel strips, and more particularly to the filtration of stripping solutions of these strips.
- the steel strips undergo a hot rolling operation at temperatures of up to about 1200 ° C. and then a cold rolling operation.
- a layer of iron oxides called calamine is formed by oxidation with air, so that, after hot rolling, the steel strips are then covered with a relatively thick and extremely hard layer of scale.
- This calamine must imperatively be removed before the final cold rolling because it may become embedded in the metal and thus significantly alter its stamping ability and its surface condition.
- the calamine layer is extremely hard, its presence on the steel strips can cause very rapid wear of the cold rolling rolls.
- pickling solutions are sulfuric acid solutions.
- hydrochloric acid pickling solutions are currently used for environmental reasons. Certain steels with high silicon content have been developed for use in magnetic circuits. These are steels with 0.6 to 3.2% silicon or, for some so-called "grain oriented", from 3 to 3.25%. They have the particularity to present, in the calamine layer formed during hot rolling, crystals composed of silicon-enriched iron silicates. These crystals must be removed by etching in the same way as the oxides. Since hydrochloric acid makes it possible to dissolve such crystals, solutions based on hydrochloric acid are used for pickling silicon steels, which makes it possible to etch silicon steels with the same techniques as those used for stripping mild carbon steels.
- colloidal silica suspension in the pickling baths (which represents about three quarters of the total silica present in the pickling solution) can considerably hinder the proper operation of the stripping lines, because it tends to settle on the hot areas of the pickling plant, and thus to line the pickling tanks, or even obstruct the pipes or the exchangers.
- silica whether in dissolved form or in the form of a colloidal suspension, may also cause disturbances in the regeneration systems of pickling solutions.
- Regeneration consists in treating those solutions which charge, during their use, with iron chlorides resulting from the dissolution of the iron oxides of the calamine, or even of the steel substrate according to the relationships (1) to (5): stripping of calamine
- the acid concentration of the pickling solution therefore decreases by consumption of chlorine ions Cl " and it is necessary to regenerate it in so-called" regeneration "units, which are arranged in line with the pickling plant and which operate by injection in a furnace or reactor where pyrohydrolysis reactions occur following reactions (6) and (7):
- Silica thus plays a disruptive role in the regeneration process (treatment of iron oxides) by inducing risks of clogging of the spray nozzles of the pickling solution.
- silica in the pickling solutions induces a reduction in the purity of the iron oxides of the scale layer formed during the stripping, which then prevents their recycling in the form of ferrites or paint pigments.
- the removal of the silica is done by regularly draining the facilities and by cleaning the tanks and pipes with a solution of soda ash.
- the emptying and cleaning of facilities requires long downtime, which decreases the production potential of these facilities.
- the time spent cleaning can then represent 5 to 10% of the production potential of the installation.
- the used pickling solutions are drained in specific installations in order to recover oxides of the highest possible purity.
- the German patent applications DE3542470 and Japanese JP7204411 describe installations in which the pickling solutions are filtered in press filters.
- the subject of the present invention is therefore a pickling plant and a method for the filtration of stripping solutions of silicon steel strips, which overcomes the disadvantages of the prior art by making it possible to directly recover the silica in the pickling tanks. .
- the present invention therefore relates to an installation for stripping a silicon steel strip, which comprises: at least one pickling tank filled with a pickling solution bath, a recirculation circuit of the pickling solution,
- a regeneration circuit of the pickling solution for the treatment of iron chlorides formed during the pickling of said band, and a device for recovering the silica produced during the pickling of said band, comprising a filtration circuit comprising:
- a preparation tank for receiving the pickling solution to be filtered from or from one of the pickling tanks
- a main filtration battery connected to said preparation tank, for filtering the pickling solution to be filtered from the preparation tank, and obtaining a silica enriched filter cake and a silica-depleted pickling solution, said main filtration battery being connected to the pickling tank from which said pickling solution was taken, to allow the injection of the silica-depleted pickling solution into said pickling tank.
- said installation being characterized in that said filtration circuit further comprises an associated filtration battery operating alternately with the main filtration battery, one of the main and associated batteries being able to provide the filtration while the other of the associated batteries and main being successively subjected to cycles of disintegration, re-filtration conditions, and then waiting.
- the pickling plant according to the invention therefore comprises a device specifically designed for the recovery of the silica produced in the strip pickling bath of silicon steel, which is simple to implement because it allows the recovery of silica by filtration, that is a known and proven technology for the separation of solid particles suspended in a liquid.
- the plant according to the invention is particularly suitable for pickling silicon steels with improved magnetic properties (steels comprising 0.6 to 3.2% silicon) or steels with a high silicon content, such as certain steels AHSS (steels high strength), comprising from 3 to 3, 25% of silicon.
- AHSS steels high strength
- the filtration circuit of the pickling plant according to the invention further comprises a device supplying the filtering agent preparation tank to form a filtration mixture with the pickling solution.
- the subject of the present invention is also a process for stripping strips of hot rolled and continuously moving silicon steel in at least one pickling tank comprising a pickling solution based on hydrochloric acid, sulfuric acid or nitric acid, with or without the addition of hydrofluoric acid, said method implementing a treatment of the silica formed in said pickling solution and which is in the form of a colloidal suspension and in dissolved form, said treatment of the silica in said solution stripping comprising the following steps: "transfer of the pickling solution of the pickling tank or a recirculation tank communicating with said pickling tank, to a preparation tank, said pickling solution contained in the preparation tank constituting the pickling solution to be filtered;
- the silica treatment process of the etching solution is carried out continuously by the implementation of two filtration batteries arranged in parallel, one of the filtration batteries being in filtration conditions, while the second battery successively undergoes the following successive cycles:
- the treatment of the silica in the process of the invention also comprises a process according to claim 1, characterized in that a filter aid capable of forming into the filter solution contained in the said preparation tank is added. a filter cake, leading to obtaining a filtration mixture.
- FIG. 1 is a schematic diagram of a first example of installation of pickling according to the invention comprising a filtration battery associated with a single pickling tank, in normal operation
- Figure 2 is a block diagram of a second example of pickling plant according to the invention comprising two operating filtration batteries alternately and also associated with a single pickling tank, Figure 2 showing the normal operation of one of the filtration batteries.
- FIGS. 3 and 4 are schematic diagrams of the second example of pickling plant according to the invention shown in FIG. 2, showing a filtering battery in the disassembly cycle and a filtration battery in the re-conditioning cycle. filtration,
- FIG. 5 represents a schematic diagram of a third example of a pickling plant according to the invention, in which the filter batteries are inserted in the recirculation and regeneration circuits of the pickling solution.
- the pickling facilities 1 shown in FIGS. 1 to 5 are of the conventional submerged band type, such as that described in US Pat. No. 3,445,284.
- Such an installation comprises a certain number of pickling tanks 20, 21, 22, for example three, arranged one after the other in a longitudinal direction of travel of the strip 4 and each containing a pickling solution bath, respectively 30, 31, 32.
- each tray 20, 21, 22 At the two ends of each tray 20, 21, 22 are placed support means 200 of the band 4, for example baffle rollers, which allow it to scroll from one tray to the next passing over their ends. adjacent.
- These pickling tanks 20, 21, 22 each contain a liquid or pickling solution
- a central control system of the pickling plant 1 according to the invention makes it possible to manage its overall operation.
- the other pickling baths 20, 21 may also be filtered in turn.
- the central control system of the pickling plant essentially ensures the maintenance of the acid and iron concentration in the different pickling tanks of the pickling plant 1, and the pH of the rinsing water used to rinse the strip after pickling.
- the central control system takes into account measurements of conductivity, concentration of acid and iron, pH (of the rinsing water) and temperatures in the various tanks, as well as the running speed of the strip.
- the central system also acts on the flow rates of additions of new acid (for pickling) and demineralized water (rinsing), as well as on the running speed of the band. In parallel, it ensures the regulation of temperatures to the required levels.
- the pickling plant shown in Figures 1 to 4 comprises:
- the silica treatment device 6, 7, 8 is arranged completely independently of the recirculation and regeneration circuits 9.
- the first pickling tank 22 is associated with a filtration circuit 6 which comprises:
- a preparation tank 61 for receiving the pickling solution 30, 31, 32 from the pickling tank 20, 21, 22,
- a device 63 supplying the preparation tank 61 with a filter medium to form a filtration mixture 64 with the pickling solution 30, 31, 32,
- a main filtration battery 62 connected to said preparation tank 61 via a pump 65 and a valve
- At least one filter element 621 capable of filtering the filtration mixture 64, to obtain a filter cake enriched with silica and a silica-depleted pickling solution intended to be returned to the pickling tank 20, 21, 22 where the pickling solution to be filtered 30, 31, 32 has been removed by means of an opening and closing valve 67.
- the filter aid may be advantageously selected from diatomaceous earth, perlite or cellulose fibers.
- a filtration battery is preferably used which comprises a candle filter made of polypropylene or polyvinylidene fluoride (PVDF).
- the preparation tank 61 receives on the one hand the pickling solution 32 from the pickling tank
- the pump 65 sends through the valve 66 filtration mixture 64, where it is filtered on the filter element (s) 621, then poured, after filtration, into the pickling tank 22 through the valve 67.
- FIG. 2 shows a second example of pickling plant 1 according to the invention, in which the filtration circuit 6 with which the first pickling tank 22 is associated further comprises an associated filtration battery 620, operating alternately with the main filtration battery 62, the main battery 62 being in a condition to ensure the filtration when the Associated filtration battery 620 is successively subjected to cycles of disassembly, re-conditioning filtration, then waiting, and vice versa.
- the main 62 and associated filtration batteries 620 are identical and each comprise at least one filter element 621, 6210 for recovering the colloidal silica suspension in the form of a cake.
- These main 62 and associated filtration batteries 620 are each connected firstly to the first pickling tank 22 via a valve 67, 670, and secondly to the same pump 65, via the valves 66 and 660 respectively.
- FIG. 3 is shown the same example of pickling plant 1 as in FIG. 2, showing the filtering battery 62 in filtration condition while the filtering battery 620 is subjected to a dewatering cycle via 7.
- the filtration circuit 6 associated with the filtration battery 620 has not been shown in FIG. 3 for the sake of clarity.
- the disintegration circuit 7 comprises a water tank 71 connected to each of the filtration batteries 62 and 620 (in dashed lines in FIG. 3) via a valve 73 and a pump 74, the filtration batteries. 62 and 620 being themselves connected to the preparation tank 61.
- the circuit of disintegration 7 also comprises a device 76 for supplying compressed air to the associated filtration battery 620, which is in the disassembly cycle, for injecting compressed air in the opposite direction of the filtration in order to destroy the filter cake.
- the associated battery 620 is previously subjected to a disassembly cycle.
- the filtration mixture 64 which is then present in the filtration battery is emptied into the preparation tank 61 via a valve 75 and immediately replaced by water from the water tank 71 with the pump 74 and through the valve 73.
- a flow of compressed air 76 is injected against the direction of filtering through a valve 77 to disintegrate the filter cake formed during filtration on the filter elements 6210.
- the water present in the filtration battery 620 is then charged in elements of the filter cake.
- FIG. 4 shows the same pickling plant 1 as in FIGS. 2 and 3.
- This figure shows the main filtration battery 62 under filtration conditions, while the associated filtration battery 620 is subjected to a reset cycle.
- Filtration condition which follows immediately after the disassembly cycle.
- the re-conditioning cycle uses a filtration re-conditioning circuit 8, which includes the water tank 71, which is connected to the filtration battery. associated 620 via a valve 81, said filter batteries being themselves connected to the preparation tank 61 via a booster pump 82 and a valve 83.
- the circuit of disassembly / washing / restoration 6 associated with main filtration battery 62 has not been shown.
- the water charged with elements of the filter cake is drained through the valve 81 into the filter.
- water tank 71 where the solid particles are decanted which are discharged via the valve 84 into a sludge collection tank 85, arranged under the water tank 71.
- the filtration battery 620 is then filled by the filtration mixture 64 from the preparation tank 61 through the valve 83 and the booster pump 82. Then a flow of compressed air 76 against the current is optionally implemented in order to unclog the canvases of the candles filtration.
- each filter element 621, 6210 of each Filtration battery 62, 620 is equipped with a device for measuring the pressure drop of the filtered pickling solution (more exactly of the filtration mixture 64). This The device operates by measuring the pressure Pe of the solution from the preparation tank and the pressure Ps at the outlet of the filtration unit (see FIG. 1).
- This device for measuring the pressure drop delivers a signal to the general control system of the pickling plant 1 (not shown in the figure) when a predetermined threshold of pressure drop of the filter elements 621, 6210 is reached. This signal triggers the following steps: "identification of the battery 62, 620 available and in condition to ensure the filtration;
- Each filter element 621, 6210 of each main filtration battery 62 and associated 620 is also equipped with a device for measuring the pressure drop (not shown in Figures 2 to 4) through the cake and which delivers a signal when a predetermined threshold of clearance is reached. This signal triggers the following steps of the process:
- the preparation tank 61 may be preceded in the pickling plant 1 according to the invention with a flocculation tank (not shown in the figures), for example implementing an addition of cationic polyacrylamides, to transform the major part of the dissolved silica (representing about one quarter of the total amount of silica produced during the etching of silicon steel strips) into a colloidal suspension capable of being filtered.
- a flocculation tank not shown in the figures
- FIG. 5 shows a third example of pickling plant 1 according to the invention in which the filtration circuit 6 is inserted in the existing recirculation circuit 9 and arranged in series with the regeneration circuit 10.
- the bath 30, 31, 32 of each tank 20, 21, 22 is, moreover, recirculated by means of pumping units and this reheating by exchangers 900, 901, 902.
- the regeneration circuit 10 comprises a pyrohydrolysis unit 110 for the transformation of the iron chlorides formed during the stripping of the strip 4 to iron oxides, and a recovery tank sludge 111 for collecting said oxides.
- the recovery device 6, 7, 8 of the silica and the recirculation and regeneration circuits 9 are arranged so that the pickling solution 32 has in the first storage tank 92 encountered in the running direction 5 of the strip 4 is sent to the filtration battery 62, 620 to be filtered, and the silica-depleted pickling solution obtained after filtration is then regenerated in the pyrohydrolysis unit 110, to be finally returned to the last storage tank 90 encountered in the running direction 5 of the strip 4.
- the equilibrium of concentration between the tanks 20, 21, 22 is defined in a known manner by the flow of etching solution 30, 31, 32 entrained by the tank tray strip 4 (from the tray 22 to the tray 20 via the tank 21), and by the flow rate of the reverse cascade between the circulation tanks 90, 91, 92 (or from the tank 90 to the tank 92 through the tank 91).
- the iron oxides resulting from the pyrohydrolysis of the chlorides in the regeneration unit 10 are recovered in the sludge collection tank 111 and the cakes of filtration loaded with silica are recovered in the sludge recovery tank 140.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0703542A FR2916205A1 (fr) | 2007-05-16 | 2007-05-16 | Installation et procede pour le traitement de solutions de decapage de bandes d'acier au silicium |
PCT/EP2008/003395 WO2008141716A1 (fr) | 2007-05-16 | 2008-04-26 | Installation et procede pour le traitement de solutions de decapage de bandes d'acier au silicium |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2145033A1 true EP2145033A1 (fr) | 2010-01-20 |
EP2145033B1 EP2145033B1 (fr) | 2014-01-01 |
Family
ID=38893302
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08749169.2A Active EP2145033B1 (fr) | 2007-05-16 | 2008-04-26 | Installation et procede pour le traitement de solutions de decapage de bandes d'acier au silicium |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2145033B1 (fr) |
CN (1) | CN101680099B (fr) |
BR (1) | BRPI0811576B1 (fr) |
FR (1) | FR2916205A1 (fr) |
RU (1) | RU2434975C2 (fr) |
WO (1) | WO2008141716A1 (fr) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8128754B2 (en) | 2008-11-14 | 2012-03-06 | Ak Steel Properties, Inc. | Ferric pickling of silicon steel |
CN102677076B (zh) * | 2011-03-18 | 2014-08-20 | 宝山钢铁股份有限公司 | 一种无溶解工序的硅钢酸洗废液中硅杂质的脱除方法 |
CN102181874A (zh) * | 2011-03-31 | 2011-09-14 | 山西太钢不锈钢股份有限公司 | 一种焊接用不锈钢线材的酸洗方法 |
CN102357541B (zh) * | 2011-07-22 | 2013-10-09 | 武汉钢铁(集团)公司 | 热水循环清洗带钢表面的系统 |
WO2019122979A1 (fr) * | 2017-12-21 | 2019-06-27 | Arcelormittal | Procédé pour le décapage de tôles d'acier |
CN110468426B (zh) * | 2019-09-19 | 2020-06-30 | 哈尔滨共乐电力科技发展有限公司 | 一种变压器硅合金钢的酸洗设备 |
CN113087345A (zh) * | 2021-03-22 | 2021-07-09 | 首钢智新迁安电磁材料有限公司 | 一种硅泥处理装置及其方法 |
EP4079936A1 (fr) * | 2021-04-23 | 2022-10-26 | Primetals Technologies Austria GmbH | Dépôt de silicium en ligne dans une installation de décapage |
EP4273297A1 (fr) * | 2022-05-06 | 2023-11-08 | John Cockerill UVK GmbH | Procédé de traitement d'une solution de décapage pour procédé de décapage |
CN115287669B (zh) * | 2022-07-12 | 2023-09-19 | 中冶南方工程技术有限公司 | 多功能带材处理机组及其使用方法 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58151335A (ja) * | 1982-03-02 | 1983-09-08 | Kawasaki Steel Corp | 珪素含有量の少ない酸化鉄の製造方法 |
JPS5973439A (ja) * | 1982-10-19 | 1984-04-25 | Nippon Steel Corp | 塩酸酸洗廃液から酸化鉄を製造する方法 |
JPS59111930A (ja) * | 1982-12-16 | 1984-06-28 | Nippon Steel Corp | 塩酸酸洗廃液から酸化鉄を製造する方法 |
JPS63144122A (ja) * | 1986-12-03 | 1988-06-16 | Sumitomo Metal Ind Ltd | 塩酸酸洗廃液からけい素を除去する方法 |
JPS6458304A (en) * | 1987-08-28 | 1989-03-06 | Kurita Water Ind Ltd | Removing method for silica contained in pickling waste liquid |
FR2663344B1 (fr) * | 1990-06-15 | 1992-10-09 | Lorraine Laminage | Procede de separation de composes siliciques des bains de decapage et installation pour sa mise en óoeuvre. |
FR2670508B1 (fr) * | 1990-12-13 | 1994-08-12 | Siderurgie Fse Inst Rech | Procede de separation des composes de silicium contenus dans un bain de decapage chlorhydrique de pieces notamment des toles d'acier. |
AT395408B (de) * | 1991-05-13 | 1992-12-28 | Andritz Patentverwaltung | Mikrofiltration |
DE4116353C1 (en) * | 1991-05-18 | 1992-11-05 | Keramchemie Gmbh, 5433 Siershahn, De | Removal of amorphous or partially dissolved silicon from aq. treatment soln. - by subjecting soln. collected in vessel to pressure-driven membrane filtration and returning silicon-free filtrate to treatment soln. |
US5344572A (en) * | 1992-07-10 | 1994-09-06 | Wadhawan Satish C | Method for treating waste pickle liquor |
FR2701493B1 (fr) * | 1993-02-12 | 1995-08-25 | Clecim Sa | Installation de décapage d'une bande métallique. |
AT411575B (de) * | 2002-07-25 | 2004-03-25 | Kcs Austria Engineering Gmbh | Verfahren zur reinigung verschmutzter saurer beizabwässer mittels querstrom-mikrofiltration |
-
2007
- 2007-05-16 FR FR0703542A patent/FR2916205A1/fr not_active Withdrawn
-
2008
- 2008-04-26 RU RU2009146569/02A patent/RU2434975C2/ru active
- 2008-04-26 BR BRPI0811576-1A patent/BRPI0811576B1/pt active IP Right Grant
- 2008-04-26 CN CN2008800162780A patent/CN101680099B/zh active Active
- 2008-04-26 WO PCT/EP2008/003395 patent/WO2008141716A1/fr active Application Filing
- 2008-04-26 EP EP08749169.2A patent/EP2145033B1/fr active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2008141716A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN101680099B (zh) | 2012-03-21 |
EP2145033B1 (fr) | 2014-01-01 |
CN101680099A (zh) | 2010-03-24 |
BRPI0811576B1 (pt) | 2020-12-29 |
RU2009146569A (ru) | 2011-06-27 |
WO2008141716A1 (fr) | 2008-11-27 |
BRPI0811576A2 (pt) | 2014-12-09 |
RU2434975C2 (ru) | 2011-11-27 |
FR2916205A1 (fr) | 2008-11-21 |
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