AU2001246436A2 - Method and device for pickling rolled metal, in particular steel strip - Google Patents
Method and device for pickling rolled metal, in particular steel strip Download PDFInfo
- Publication number
- AU2001246436A2 AU2001246436A2 AU2001246436A AU2001246436A AU2001246436A2 AU 2001246436 A2 AU2001246436 A2 AU 2001246436A2 AU 2001246436 A AU2001246436 A AU 2001246436A AU 2001246436 A AU2001246436 A AU 2001246436A AU 2001246436 A2 AU2001246436 A2 AU 2001246436A2
- Authority
- AU
- Australia
- Prior art keywords
- pickling
- pickling section
- measured values
- measured
- coil
- 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.)
- Abandoned
Links
- 238000005554 pickling Methods 0.000 title claims description 105
- 239000002184 metal Substances 0.000 title claims description 25
- 229910052751 metal Inorganic materials 0.000 title claims description 25
- 238000000034 method Methods 0.000 title claims description 23
- 229910000831 Steel Inorganic materials 0.000 title claims description 5
- 239000010959 steel Substances 0.000 title claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 28
- 238000000576 coating method Methods 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 230000033228 biological regulation Effects 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 230000006698 induction Effects 0.000 claims description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 239000002253 acid Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000013519 translation Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- C23G3/027—Associated apparatus, e.g. for pretreating or after-treating
-
- 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
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
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)
- ing And Chemical Polishing (AREA)
Description
I VERIFICATION OF TRANSLATION INTERNATIONAL APPLICATION NO. PCT/EP01/01683 I, (name and address of translator) Alexander Zinchuk 340 East 74 th Street. Apt. New York. N.Y. 10021. U.S.A.
am the translator of the document(s) attached and I state that the following is a true translation to the best of my knowledge and belief Signature of Translator Dated ut( L- t NYI 5232215vl DT-6218 METHOD AND DEVICE FOR PICKLING A METAL, IN PARTICULAR, STEEL STRIP NYI 5406610vl The present invention relates to a method and device for pickling of a metal, in particular, steel strip fed to a regulated pickling process which in addition to pickling medium parameters, is regulated by the parameters of the coil and/or metal strip predetermined and regulated based on a computation model before the metal strip is fed into the pickling section.
DE 197 43 022 Al discloses a method of pickling a metal strip based on a measurement in the displacement direction after the pickling plant and in which according to defect categories, which are determined by a measuring unit, pickling parameters such as, temperature of the pickling liquid, displacement speed of the metal strip, acid content in the pickling liquid, metal content, in particular, iron content, strip parameters such as, material and geometrical dimension, are adjusted. In this respect, the defects can only be subsequently determined as well as a conclusion made as to favorable pickling.
The control system deals only with the pickling plant itself.
According to another known method (EP-0 482 785 Al), turbulent streams, which are generated in a pickling container with nozzles, are used.
Thereby, an optimal pickling result with a minimal consumption of a pickling 2 NYI 5406610v medium can be achieved. This result should be achieved by controlling the turbulence of the stream in the pickling medium dependent on the displacement speed of the to-be-pickled strip. A far-reaching effect is not to be expected.
A further method of pickling a rolled strip in a pickling plant is disclosed in EP-0 602 437 B1. The method is based on a particular operating mode according to which several pickling vats adjoin each other one after the other.
In the pickling vats, an acid-containing pickling medium is sprayed by spraying nozzles arranged on a vat partially sidewise of, above and below the strip displacement plane, with the nozzles being variably controlled and with the pickling medium being introduced in an arbitrary preselected amount. At that, the acid concentration, and/or medium temperature, and/or the outlet speed of the pickling medium from nozzles are preselected.
U.S. Patent No. 5,800,694 discloses adaptation of a pickling medium to the process. In several pickling tanks, the acid content (HF-IHN0 3 the water content, and the regenerated acid are measured in two stages. To this end, it is necessary to subject the components of the pickling medium to a preliminary treatment. Other influencing parameters are not taken into account.
3 NYI 5406610v1 U.S. Patent No. 4,325,746 discloses storing different cleaning solutions in storage tanks. As a result, the cleaning medium in the pickling tank can be adapted to the cleaned metal strip. Here, also, the parameters before the pickling surface are not taken into consideration.
The method to which the present invention is directed is disclosed in an article "Model-Based Control for Pickling Lines," Iron and Steel Engineer, 1997, pages 47-50. According to the disclosed method, short measurement time and energy savings are achieved by regulating the pickling lines taken into consideration the determined parameters of the coil and/or of the metal strip before the metal strip is fed into the pickling station. In order to insure only one way of conducting the process, the computation model is based on assumed values of adapted parameters. To this end, an inverse model on a basis of a physical and chemical process model is used, with simulation calculation being conducted.
The object of the invention is to improve the complex pickling process by a detailed computation model which would take into consideration other parameters in addition to those of the pickling vat.
4 NYI 5406610v] This object is achieved according to the invention by preadjusting the pickling process on a basis of a set-up computation model according to coil parameters sensed by a data transducer and on a basis of a regulating computation model according to coil parameters sensed by another data transducer, by taken into consideration at least measured values for scale, bath temperature, and/or acid concentration, and by regulating, using the regulating computation model, the servo parameters within the system of the pickling section.
The advantage consists in that the pickling parameters are so adjusted in advance that under- or over-pickling is prevented, in that the acid concentration and the acid supply are correctly adjusted, whereby the pickling medium is economically used, and in that the correct temperature can be calculated in advance, together with other adjustable pickling parameters. At that, the scale, which is removed after casting, shaping, and annealing, and other coatings are already taken into consideration. The invention also takes into consideration the preliminary breaking of the scale (by a stretching-bending-straightening leveller), whereby fissures and pores are formed in the scale layer, which NYI 5406610vl increases the surface on which the acid acts. In cases when the scale is removed by an abrasive or hydromechanical treatment, the scale quantity, which is dissolved in the pickling process, is reduced. Thereby, the preliminary descaling permits to reduce pickling time. In case, the temperature of the metal strip increases before the strip enters in the pickling section, the contact time of the strip surface with the pickling medium increases at an optimal pickling temperatures. The heating path of the metal strip is shortened and the pickling time falls. The pickling time also falls when the scale is removed by laseroptical means before the strip enters the pickling section, and the quantity of the to-be-dissolved scale is reduced.
The quantity of the scale, needs not to be assessed, as was the case previously. An integration of the additional scale calculation model takes place.
A target variable of such optimization can be: minimum energy use, variable coil output, acceleration reaction dependent on the surface contamination, minimizing the consumption of the pickling medium and losses of the pickling medium, minimizing overpickling, and minimizing underpickling. With regulated descaling units, measurement units for determining scaling can 6 NYI 5406610v determine thickness of the scale layer, shape, distribution and color. To this end, precise calculation models are used.
According to an embodiment of the invention, the servo components of the pickling section are regulated or readjusted based on a measured value for the scale deposit before the pickling section. This makes possible regulation of the pickling section with a least possible transit time.
Advantageously, additional measured values for scale deposits or coating are determined in a region in a displacement direction in front of the pickling section, and are used for readjustment of the servo components of the pickling section and/or dependent on measured and/or calculated values.
Other parameters outside of the pickling section are taken into consideration by controlling the pickling times based on strip entrance data of the coil and on the system adjustment.
In accordance with another method step, the measured values for the coating or the scale are used for regulation of a pretreatment unit arranged upstream of the pickling section.
7 NYI 5406610vl It is advantageous that the pretreatment unit and the servo components of the pickling section are readjusted in accordance with the measured and calculated values.
In device for pickling a metal, in particular, steel strip fed in a displacement direction from a coil of a pickling plant, for which a regulation by a plurality of parameters is contemplated, the object of the invention is achieved by communicating measured values from coil measured value or data transducers via a set-up computation model and a regulating computation model to adjustment units of a pickling section. Thereby, the pickling section can be operated with precise regulation which results in the above-discussed advantages.
In one embodiment of the device, it is provided that measured value from coil measured value transducers are input into the regulating computation model. The set-up computation model uses general entrance data for the metal strip. The scale deposits can be calculated by using a trial computation model for effecting preliminary adjustment of the slow and rapid servo components of the pickling section or readjustment in accordance with comparison.
8 NYI 540661OvI In another case, the measured values of a measured value transducer for coating or scale are used for readjustment of the servo components of the pickling section.
According to other features, a pretreatment unit, the measured values of which are input into the regulating computation model, is arranged upstream of the pickling section. Upon recognition of the exigency and by suitable evaluation of the coil data and the instant system set-up, the pretreatment unit can influence the pickling time. As a pretreatment unit, a heating unit, a mechanical, abrasive, hydromechanical, laser-optical, or oscillating descaler can be used.
Further improvement is achieved by providing an induction heating unit between the pretreatment unit and the pickling section. The inductive preheating of the metal strip takes place before the pickling section and is used for rapid regulation of the metal strip temperature and for adjustment of the metal strip pickling temperature.
9 NY] 5406610v The embodiments of the invention are schematically shown in the drawings and will be explained in detail below.
The drawings show: Fig. 1 a block-diagram of a basic design of a coil and pickling plant with regulation, Fig. 2 a first variant of the same block-diagram with a measured value transducer, Fig. 3 a second variant of the block-diagram with a pretreatment unit, Fig. 4 a third variant of the block-diagram with a measured value transducer and a pretreatment unit, and Fig. 5 a fourth variant of the block-diagram with a measured value transducer, a pretreatment unit, and induction heating.
NYI 5406610v According tot he basic design shown in Fig. 1, a metal strip is fed from a coil 2 into a pickling section 3. At that, coil data 4 from a data transducer 4a and a data transducer 4b are introduced into a set-up computation model 6 and/or into a regulation computation model 8 and are processed in accordance with the program. In the set-up computation model 6 further measured values 7 can be taken into consideration. Thereby, the pickling process is regulated, in addition to the pickling medium parameters, before the metal strip 1 is fed into the pickling section 3, by parameters of the coil 2 and/or the metal strip 1 which were determined, in the system 5, with servo components and/or measured.
In accordance with a first variant according to Fig. 2, in addition to the presetting of the pickling medium parameters, additionally acquires measured values, which characterized the coating or scale and which are determined by a measured value transducer M in a scale registration unit 10, are processed in the regulating computation model 8. The pickling process is regulated, respectively (Figs. on the basis of the set-up computation model 6 with preset measured values of the coil 2 and on the basis of the regulating computation model 8 which takes into account at least the measured values for the scale, NY11 5406610v NYI 5406610 vl bath temperature, the temperature of the pickling medium and/or acid concentration. The additional measured values for scale deposits before the pickling section 3 are used for regulating or readjusting the servo elements in the system In accordance with a second variant represented in Fig. 3 and a suitable evaluation of the coil information 4, a pretreatment unit H, which influences the pickling time, is used. In addition, the slow and rapid servo components of the pickling section 3 are readjusted in accordance with measured and/or calculated values output by the regulating computation model 8, in particular, taking into consideration the changed pickling times.
According to a third variant, represented in Fig. 4, additional measured value of the scale deposits and coatings is determined by the measured value transducer M of the scale registration unit 10 located in front of the pickling section 3 in the displacement direction 9, and is used for readjusting of the servo components of the pickling section 3 and/or in accordance with measured and calculated values. Besides, the pickling times are regulated on the basis of the strip inlet information of the coiler 2 and the system set-up. The acquired 12 NYI 5406610vI measured values with respect to coating and scale are used for regulating a pretreatment unit H located upstream of the pickling section 3.
On the basis of the fourth variant according to Fig. 5, in addition to the scale registration unit 10 and the pretreatment unit H, an induction heating unit W is provided between the pickling section 3 and the pretreatment unit H. The pickling time is defined as a contact time of a to-be-cleaned surface with the pickling medium necessary for a reliable removal of the contamination from the strip 1. The pretreatment unit H can include a preheating unit in form of the induction heating unit W.
The pretreatment unit H basically includes a mechanical, abrasive, hydromechanical, laser-optical, or oscillating descaler. The induction preheating of the metal strip by the induction heating unit W is effected before the pickling section and serves for a rapid regulation of the metal strip and pickling medium temperatures.
13 NYI 5406610vl 13a In the claims which follow and in the preceding description of the invention, except where the context requires otherwise due to express language or necessary implication, the word "comprise", or variations such as "comprises" or "comprising", is used in an inclusive sense, ie. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention.
It is to be understood that the prior art publications referred to herein, do not constitute an admission that that the publication forms a part of the common general knowledge in the art, in Australia or in any other country.
H:\Luisa\Kee\Speci\20124636.doc 15/07/03 List of Reference Numerals 1. Metal Strip 2. Coil 3. Pickling Section 4. Coil-data 4a. Data Transducer 4b. Data Transducer System With Servo Components 6. Set-up Computation Model 7. Measured Values 8. Regulating Computation Model 9. Displacement Direction Scale Registration Unit 14 NYI 5406610vl M Measured Value Transducer H Pretreatment Unit W Induction Heating Unit NYI 540 6 610vl
Claims (8)
- 2. A method according to claim i, characterised in that servo parameters of pickling section are regulated or re-adjusted based on measured values for scale deposits before the pickling section.
- 3. A method according to claim 1 or 2, characterised in that additional measured values for scale deposits or coating are determined in a region in a displacement direction before the pickling section and are used for readjustment of the servo components of the pickling section and/or in accordance with measured and calculated values.
- 4. A method according to one of claims 1 through 3, characterised in that pickling times are regulated based on strip entrance data of the coil and the system H:\Luisa\Keep\Speci\2O01246436.doc 15/07/03 17 adjustment. A method according to one of claims 1 through 4, characterised in that the measured values for the coating or the scale are used for regulating a pretreatment unit located upstream of the pickling section.
- 6. A method according to claim 5, characterised in that the pretreatment unit and the servo components of the pickling section are re-adjusted in accordance with the measured or regulated values.
- 7. A device for pickling a metal, in particular, steel strip fed in a displacement direction from a coil of a pickling plant, for which a regulation by a plurality of parameters is contemplated, characterised in that measured values from coil measure value or data transducers are communicated via a set-up computation model and a regulating computation model to adjustment units of a pickling section.
- 8. A device according to claim 1, characterised in that measured values from the coil measured value transducers are input into the regulating computation model.
- 9. A device according to claim 7 or 8, characterised in that measured values of a measured value transducer related to coating or scale are used for re-adjustment of servo components of the pickling section. A device according to claim 7 or 8, characterised in that a pretreatment unit, measured values of which are input into the regulating computation model, is located upstream of the pickling section.
- 11. A device according to any one of claims 6 to H:\Luisa\Keep\Speci\2001246436.doc 15/07/03 18 characterised in that an induction heating unit for the strip is provided between the pretreatment unit and the pickling section. Dated this 15th day of July 2003 SMS DEMAG AKTIENGESELLSCHAFT By their Patent Attorneys GRIFFITH HACK Fellows Institute of Patent and Trade Mark Attorneys of Australia H:\Luisa\Keep\Speci\2001246436 .doc 15/07/03
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10007080 | 2000-02-16 | ||
| DE10007080 | 2000-02-16 | ||
| DE10062869A DE10062869A1 (en) | 2000-02-16 | 2000-12-16 | Method and device for pickling rolled metal, in particular steel strip |
| DE10062869 | 2000-12-16 | ||
| PCT/EP2001/001683 WO2001061073A2 (en) | 2000-02-16 | 2001-02-15 | Method and device for pickling rolled metal, in particular steel strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2001246436A2 true AU2001246436A2 (en) | 2001-08-27 |
Family
ID=26004374
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2001246436A Abandoned AU2001246436A2 (en) | 2000-02-16 | 2001-02-15 | Method and device for pickling rolled metal, in particular steel strip |
| AU4643601A Pending AU4643601A (en) | 2000-02-16 | 2001-02-15 | Method and device for pickling rolled metal, in particular steel strip |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU4643601A Pending AU4643601A (en) | 2000-02-16 | 2001-02-15 | Method and device for pickling rolled metal, in particular steel strip |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US20030015259A1 (en) |
| EP (1) | EP1257687A2 (en) |
| JP (1) | JP2003528978A (en) |
| CN (1) | CN1401015A (en) |
| AU (2) | AU2001246436A2 (en) |
| BR (1) | BR0107950A (en) |
| CA (1) | CA2399754A1 (en) |
| CZ (1) | CZ20022770A3 (en) |
| PL (1) | PL362146A1 (en) |
| RU (1) | RU2002124590A (en) |
| SK (1) | SK11852002A3 (en) |
| WO (1) | WO2001061073A2 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10031978A1 (en) * | 2000-06-30 | 2002-01-10 | Sms Demag Ag | Method and device for automatic scale detection from surfaces of metallic strip material, in particular hot-rolled steel strip and stainless steel strip |
| KR100899687B1 (en) * | 2002-08-23 | 2009-05-28 | 주식회사 포스코 | Descaling method of hot coil |
| WO2010006895A1 (en) * | 2008-07-16 | 2010-01-21 | Siemens Aktiengesellschaft | Operating method for a processing device processing a metal strip and system for processing a metal strip |
| CN102220595A (en) * | 2011-05-31 | 2011-10-19 | 马鞍山钢铁股份有限公司 | Induction heating method and device for acid washing of hot rolled steel strip |
| CN106238470A (en) * | 2015-06-09 | 2016-12-21 | 宝山钢铁股份有限公司 | Consider the pickling time forecasting procedure of straightening scale breading effect |
| JP6909786B2 (en) | 2015-07-22 | 2021-07-28 | コリーン コーポレーションＫｏｌｅｎｅ Ｃｏｒｐｏｒａｔｉｏｎ | Scale conditioning process for advanced high strength carbon steel alloys |
| CN105648460B (en) * | 2016-03-14 | 2018-02-13 | 佛山市网冠金属制品有限公司 | A kind of intelligent spray system and method |
| CN106825080A (en) * | 2017-01-11 | 2017-06-13 | 首钢京唐钢铁联合有限责任公司 | Method for removing red rust defect of steel for automobile plate |
| IT201700056336A1 (en) * | 2017-05-24 | 2018-11-24 | Danieli Off Mecc | CLEANING SYSTEM FOR METAL PRODUCTS |
| EP3959358B1 (en) * | 2019-04-25 | 2023-06-07 | Speira GmbH | Surface treatment of flat products made of aluminium alloys containing color measurements |
| EP4108806A4 (en) * | 2020-02-18 | 2023-07-26 | Posco | Process control system and operating method therefor |
| CN111519194B (en) * | 2020-03-27 | 2022-02-11 | 佛山津西金兰冷轧板有限公司 | Cold-rolled sheet manufacturing process |
| CN115044917B (en) * | 2022-06-21 | 2023-10-03 | 北京首钢冷轧薄板有限公司 | Method and device for determining pickling speed of hot rolled strip steel |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4325746A (en) * | 1979-10-01 | 1982-04-20 | Olin Corporation | System for cleaning metal strip |
| KR900007072B1 (en) * | 1985-03-15 | 1990-09-28 | 신닛뽄 세이데쓰 가부시끼가이샤 | Method and apparatus for manufacturing coldrolled steel strip |
| US5175502A (en) * | 1990-09-14 | 1992-12-29 | Armco Steel Company, L.P. | Method and apparatus for determining acid concentration |
| JPH05202419A (en) * | 1992-01-27 | 1993-08-10 | Kawasaki Steel Corp | Method for descaling hot rolled silicon steel plate |
| FR2701410B1 (en) * | 1993-02-12 | 1995-05-05 | Clecim Sa | Stripping installation of a metal strip. |
| AT404030B (en) * | 1995-02-15 | 1998-07-27 | Andritz Patentverwaltung | METHOD OF STAINLESSING STEEL MATERIALS, ESPECIALLY STAINLESS STEEL |
| KR100464580B1 (en) * | 1997-03-03 | 2005-02-28 | 가부시끼가이샤 히다치 세이사꾸쇼 | Acid washing plant and control method thereof |
| DE19743022A1 (en) * | 1997-09-29 | 1999-04-01 | Siemens Ag | Method and device for pickling a metal strip |
| US6450183B1 (en) * | 1999-12-22 | 2002-09-17 | Kolene Corporation | Composition, apparatus, and method of conditioning scale on a metal surface |
-
2001
- 2001-02-15 CA CA002399754A patent/CA2399754A1/en not_active Abandoned
- 2001-02-15 AU AU2001246436A patent/AU2001246436A2/en not_active Abandoned
- 2001-02-15 PL PL36214601A patent/PL362146A1/en not_active Application Discontinuation
- 2001-02-15 WO PCT/EP2001/001683 patent/WO2001061073A2/en not_active Application Discontinuation
- 2001-02-15 RU RU2002124590/02A patent/RU2002124590A/en unknown
- 2001-02-15 AU AU4643601A patent/AU4643601A/en active Pending
- 2001-02-15 US US10/203,846 patent/US20030015259A1/en not_active Abandoned
- 2001-02-15 CZ CZ20022770A patent/CZ20022770A3/en unknown
- 2001-02-15 EP EP01919285A patent/EP1257687A2/en not_active Withdrawn
- 2001-02-15 JP JP2001559906A patent/JP2003528978A/en not_active Withdrawn
- 2001-02-15 CN CN01805176A patent/CN1401015A/en active Pending
- 2001-02-15 BR BR0107950-6A patent/BR0107950A/en not_active Application Discontinuation
- 2001-02-15 SK SK1185-2002A patent/SK11852002A3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| RU2002124590A (en) | 2004-03-20 |
| WO2001061073A3 (en) | 2002-04-25 |
| SK11852002A3 (en) | 2002-12-03 |
| WO2001061073A2 (en) | 2001-08-23 |
| BR0107950A (en) | 2004-01-06 |
| CA2399754A1 (en) | 2001-08-23 |
| JP2003528978A (en) | 2003-09-30 |
| CN1401015A (en) | 2003-03-05 |
| US20030015259A1 (en) | 2003-01-23 |
| CZ20022770A3 (en) | 2003-03-12 |
| AU4643601A (en) | 2001-08-27 |
| EP1257687A2 (en) | 2002-11-20 |
| PL362146A1 (en) | 2004-10-18 |
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| MK1 | Application lapsed section 142(2)(a) - no request for examination in relevant period |