CN100554523C - A kind of pickling installation and acid washing method thereof of steel plate continuous casting and rolling process - Google Patents
A kind of pickling installation and acid washing method thereof of steel plate continuous casting and rolling process Download PDFInfo
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- CN100554523C CN100554523C CNB2006101612015A CN200610161201A CN100554523C CN 100554523 C CN100554523 C CN 100554523C CN B2006101612015 A CNB2006101612015 A CN B2006101612015A CN 200610161201 A CN200610161201 A CN 200610161201A CN 100554523 C CN100554523 C CN 100554523C
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Abstract
The invention discloses a kind of pickling installation of steel plate continuous casting and rolling process, be between pickling tank (1) and rinse tank (5), on a plane of pickled steel strip (2), establish the coarse brush roll of whole outer round surface (3), on its another surperficial same position, establish the support roll (4) of surface finishing and form a pair of brush roll group (12) with brush roll (3), all for contacting of certain pressure to be arranged, two roll axis are all vertical with the direction of motion of pickled steel strip (2) with pickled steel strip (2) for two rollers.The invention also discloses a kind of acid washing method that adopts by above-mentioned pickling installation.Adopt such scheme that residual slag inclusion that is insoluble to acid and inclusion are compared removing completely, improved the pickling clean-up performance on pickled steel strip surface afterwards, reduce the surface imperfection of hot rolling acid-cleaning belt steel product, for the further cold rolling and subsequent handling of product provides the fine blank, avoid the hot rolling acid-cleaning band steel breaker roll of surface imperfection and the damage of cold-rolling mill thereof.
Description
Technical field
The present invention relates to the steel rolling production technique in the metallurgical industry, more particularly, the present invention relates to a kind of pickling installation of steel plate continuous casting and rolling process.The invention still further relates to the acid washing method that this pickling installation adopts.
Background technology
At present, in steel rolling is produced, generally adopt the method for CSP during latten.Meanwhile, the latten that adopts the CSP method to be obtained also just begins generally as cold rolling base-material.
Technical parameter and the Production Flow Chart adopted during at present general CSP method is produced are: adopt thickness of strand between 50～150mm, thickness commonly used is between 50～90mm, casting speed directly enters the process furnace heating at 3～6.5m/min behind the continuous casting, carry out hot rolling then.The thickness of continuously cast bloom was 200～250mm when the traditional hot rolled steel plate was produced, based on 250mm, and the about 1m/min of casting speed.Fast in the CSP latten process owing to casting speed; steel inclusion come-up difficulty; the easy disturbance of molten steel in the crystallizer causes covering slag to be involved under continuously cast bloom surface and the epidermis, causes the latten surface to form surface imperfection such as slag inclusion and inclusion.If this class surface imperfection is also stayed surface of steel plate after hot rolling, then generally adopt the method for pickling to remove, a lot of slag inclusions, impurity can dissolve with acid solution generation chemical reaction or in acid solution and be eliminated with liquid stream.But this class surface imperfection such as slag inclusion, impurity that remains in the pickled steel strip surface sometimes is insoluble to acid solution, then can't remove by pickling.If when pickling, can not remove above-mentioned residue, to the pickled steel strip surface quality of products that cold rolling processing produced of then carrying out will be very deleterious, especially CGL production line etc. to the high products production of surperficial specification of quality in, except surface quality being caused fatal influence, slag inclusion and inclusion further were pressed in the pickled steel strip matrix after cold-rolling mill was rolling, the surface imperfection that formation is difficult to remove, also can bring serious harm, cause damage as breaker roll and cold-rolling mill thereof to follow-up cold-rolling process equipment.
Summary of the invention
Problem to be solved by this invention provides a kind of pickling installation of steel plate continuous casting and rolling process, its objective is the slag inclusion and the inclusion that are insoluble to acid removed on the surface of steel plate that the acid cleaning process in the continuous casting and rolling process can't remove.
To achieve these goals, the technical scheme that the present invention takes is: the pickling installation of this steel plate continuous casting and rolling process that is provided, comprise pickling tank, rinse tank, the direction of motion of pickled steel strip is from the pickling tank to the rinse tank, between described pickling tank and rinse tank, on a plane of pickled steel strip, establish the coarse brush roll of whole outer round surface, on its another surperficial same position, establish the support roll of surface finishing and form a pair of brush roll group with brush roll, two rollers are that contacting of certain pressure arranged with pickled steel strip all, and two roll axis are all vertical with the direction of motion of pickled steel strip.
The optimal technical scheme of brush roll group is:
Described brush roll group is more than a pair of, and be that certain intervals ground distributes, between each is to the brush roll group, on the two sides of pickled steel strip, respectively establish a plurality of nozzles, and with the direction of brush roll and supporting roller line parallel on be uniform distribution in line, establish a plurality of spray apertures on the described nozzle, and towards the surface of pickled steel strip, described nozzle is connected with high-pressure water pipe, is highly compressed, the weakly acidic aqueous solution in the high-pressure water pipe.
The two ends of described brush roll are provided with the brush roll setting device, and promptly the bearing support of brush roll is installed on the slide of vertical and by brush roll and regulates electric motor driving.
Describedly manyly to the brush roll group in the lip-deep distribution situation of pickled steel strip be: on a surface of pickled steel strip, brush roll and support roll are to be provided with at interval, and the quantity of brush roll and support roll equates.
Perhaps describedly manyly to the brush roll group in the lip-deep distribution situation of pickled steel strip be: on the upper surface at pickled steel strip, brush roll and support roll are to be provided with at interval, and total quantity is an odd number, and the quantity of brush roll is Duoed one than support roll.
The optimal technical scheme of brush roll is:
Described brush roll is on whole outer round surface, the short metal strip that is covered with bunch shape, the one or both ends of each short metal strip and the cylindrical of brush roll body are fastenedly connected, the transverse section of described metal strip is for circle or for the Polygons of rib is arranged, the material hardness of described metal strip is equal to or less than the material hardness of pickled steel strip.
Perhaps described brush roll is on whole outer round surface, be covered with the little tinsel that on brush roll external diameter direction, has circular arc, the cylindrical of described tinsel and brush roll body is fastenedly connected, the direction of its lamellar body is along described brush roll radially, and being parallel to the axis of brush roll, the material hardness of described tinsel is equal to or less than the material hardness of pickled steel strip.
Perhaps described brush roll is covered with high-intensity nonmetallic or band on whole outer round surface, the cylindrical of its one or both ends and brush roll body is fastenedly connected.
The present invention also provides the acid washing method that pickling installation adopted of above-mentioned steel plate continuous casting and rolling process, and its technical scheme is that the processing step of this acid washing method is:
A, pickling: will through continuous casting and rolling rolling pickled steel strip carry out pickling by the pickling tank that fills acidic liquid;
B, extract: the pickled steel strip that comes out from described pickling tank is removed the acidic liquid of taking out of through squeezing roller a pair of and its surface pressure close contact from pickling tank;
C, spray: adopt highly compressed to have weakly acidic liquid two surfaces of pickled steel strip are sprayed, wash, highly compressed has the rinsing liquid of weakly acidic liquid from rinse tank 5;
D, brush surface: adopt to have to be shaped as strip or flaky, material is the brush roll of metal or nonmetallic bristle, with surface of certain pressure and pickled steel strip or two surfaces contact and with pickled steel strip formation relative movement, remove the lip-deep impurity of pickled steel strip;
E, pinch: pickling, the pickled steel strip that sprays and clean with water after finish on the surface contact and by the pinch roll of pickled steel strip direction of motion rotation through a pair of compressing with it, and by the driving force of its generation pickled steel strip are sent to rinse tank;
F, rinsing: in rinse tank, pickled steel strip is carried out rinsing, be sent to rolling mill production line then, cleaned the pipeline that the liquid that flows down is sent to spray with clear water.
In above-mentioned processing step, step c and steps d repeat repeatedly and hocket.
The present invention adopts technique scheme, promptly in pickling installation, adopted brush roll, utilize the also effect of combination spray of bristle action on the brush roll, residual slag inclusion that is insoluble to acid and inclusion are compared removing completely, can improve the pickling clean-up performance on pickled steel strip surface afterwards, reduce the surface imperfection of hot rolling acid-cleaning belt steel product,, avoid the hot rolling acid-cleaning band steel breaker roll of surface imperfection and the damage of cold-rolling mill thereof for the further cold rolling and subsequent handling of product provides the fine blank.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments:
Fig. 1 is a structural representation of the present invention;
The sectional structure synoptic diagram that Fig. 2 dissects along the plane that is parallel to a pair of brush roll and support roll axis for the present invention shown in Figure 1;
Fig. 3 is the process flow diagram of the acid washing method that the present invention relates to.
Be labeled as among the figure: 1, pickling tank, 2, pickled steel strip, 3, brush roll, 4, support roll, 5, rinse tank, 6, squeezing roller, 7, pinch roll, 8, spray beam, 9, the support roll CD-ROM drive motor, 10, brush roll setting device, 11, brush roll is regulated motor, and 12, the brush roll group, 13, the brush roll stopper, 14, nozzle, 15, depress cylinder, 16, the brush roll CD-ROM drive motor, 17, the roller transmission shaft, 18, roller transmission shaft universal joint, 19, supporting shaft holder, 20, water eliminator, 21, brush roll lateral register device, 22, brush roll location sensitive contact, 23, limit switch.
Embodiment
As Fig. 1 and the expressed structure of the present invention of Fig. 2, the present invention is a kind of pickling installation of steel plate continuous casting and rolling process, identical with known technology is, it also comprises pickling tank 1, rinse tank 5, with the direction of motion of rolling equipment successive pickled steel strip 2 be from pickling tank 1 to rinse tank 5.This equipment is after continuous casting and rolling equipment, and before cold-rolling mill, by the cleanup acid treatment of this equipment, slag inclusion, impurity can dissolve with acid solution generation chemical reaction or in acid solution and be eliminated with liquid stream.
The slag inclusion that is insoluble to acid on the surface of steel plate that the present invention can't remove for the acid cleaning process of solve removing in the continuous casting and rolling process and the problem of inclusion, following technical scheme has been proposed: on a plane, establish the coarse brush roll 3 of whole outer round surface between pickling tank 1 and the rinse tank 5, at pickled steel strip 2, on its another surperficial same position, establish the support roll 4 of surface finishing and form a pair of brush roll group 12 with brush roll 3, two rollers all with pickled steel strip 2 for contacting of certain pressure to be arranged, two roll axis are all vertical with the direction of motion of pickled steel strip 2.The present invention adopts technique scheme, be to have adopted brush roll 3 in the pickling installation, utilize the also effect of combination spray of bristle action on the brush roll 3, residual slag inclusion that is insoluble to acid and inclusion are compared removing completely, can improve the pickling clean-up performance on pickled steel strip 2 surfaces afterwards, reduce the surface imperfection of hot rolling acid-cleaning belt steel product, for the further cold rolling and subsequent handling of product provides the fine blank, avoid the hot rolling acid-cleaning band steel breaker roll of surface imperfection and the damage of cold-rolling mill thereof.Being in transmission connection of CD-ROM drive motor among Fig. 1 only expressed annexation with dot-dash point, do not represent the locus that it is actual.
For improving the present invention, above-mentioned brush roll group 12 concrete structures have also been done following design: the two ends of each roller are by supporting shaft holder 19 supportings.If the axial location of brush roll stopper 13 control brush rolls 3.If brush roll lateral register device 21 also utilizes hydro-cylinder to adjust the position of the horizontal direction of brush roll 3.Water eliminator 20 is all established in end at each roller, prevents to contain tart liquid and flows into the Machinery Ministry position.
The present invention further takes following mode in the specific implementation:
In order to increase the effect of brush roll 3, brush roll group 12 is more than a pair of, and be that certain intervals ground distributes, between each is to brush roll group 12, on the two sides of pickled steel strip 2, respectively establish spray equipment, comprise a plurality of nozzles 14, and with brush roll 3 direction parallel with support roll 4 axis on be uniform distribution in line, establish a plurality of spray apertures on the described nozzle 14, and towards the surface of pickled steel strip 2, described nozzle 14 is connected with high-pressure water pipe, is highly compressed, the weakly acidic aqueous solution in the high-pressure water pipe.
The concrete structure of above-mentioned spray equipment is: be provided with the spray header of atomizing of liquids between roll gap between brush roll group 12, high-pressure water pipe just recited above.Spray header is fixed on the spray beam 8, is furnished with the nozzle 14 of some amount on the spray header, and its position as mentioned above.Atomizing of liquids adopts the circulation weak acid water in the rinse tank, about about 80 ℃ of water temperature.
All parts that contact with acid solution all adopt the acid resisting material manufacturing.
The brush roll 3 of two adjacent brush roll groups 12 adopts the mode of staggered arrangement, and following two kinds of concrete modes are arranged:
First kind of mode: manyly to brush roll group 12 in the lip-deep distribution situation of pickled steel strip 2 be: on a surface of pickled steel strip 2, brush roll 3 and support roll 4 are to be provided with at interval, and the quantity of brush roll 3 and support roll 4 equates.This mode is used for jet flow and turbulent flow type pickling.Because the tension force of pickled steel strip 2 in pickling tank 1 is bigger, there is friction between the lower surface of pickled steel strip 2 and the bottom land holder stone hardly, thereby the probability that lower surface and the upper surface undissolved slag inclusion of acid and inclusion exist equates, thereby should adopt this mode to arrange.During practice, can adopt the mode of four pairs of brush roll group 12 arranged crosswise.
The second way: manyly to brush roll group 12 in the lip-deep distribution situation of pickled steel strip 2 be: on the upper surface of pickled steel strip 2, brush roll 3 and support roll 4 are to be provided with at interval, and total quantity is an odd number, and the quantity of brush roll 3 is more than support roll 4.Deep trouth and shallow-slot type pickling for traditional type, because the bottom of pickling tank 1 all is equipped with holder stone, there is certain friction during pickled steel strip 2 operations and between the holder stone, the lower surface of pickled steel strip 2 undissolved slag inclusion of acid and inclusion in the process of operation major part be removed, thereby the arrangement form of brush roll group 12 is when practice, can adopt two pairs of brush rolls 3 last brush roll group 12, a pair of brush roll 3 under the mode of brush roll group 12.
The present invention can adopt following three modes on the structure of the bristle on the surface of brush roll 3:
First kind of mode: brush roll 3 is on whole outer round surface, the short metal strip that is covered with bunch shape, the one or both ends of each short metal strip and the cylindrical of brush roll 3 bodies are fastenedly connected, the transverse section of described metal strip is for circle or for the Polygons of rib is arranged, the material hardness of described metal strip is equal to or less than the material hardness of pickled steel strip 2.
The second first kind mode: brush roll 3 is on whole outer round surface, be covered with the little tinsel that on brush roll 3 external diameter directions, has circular arc, the cylindrical of described tinsel and brush roll 3 bodies is fastenedly connected, the direction of its lamellar body is along described brush roll 3 radially, and being parallel to the axis of brush roll 3, the material hardness of described tinsel is equal to or less than the material hardness of pickled steel strip 2.
The third mode: brush roll 3 is covered with high-intensity nonmetallic or band on whole outer round surface, the cylindrical of its one or both ends and brush roll 3 bodies is fastenedly connected.
Consider brush roll 3 wearing and tearing in process of production, the present invention is provided with brush roll setting device 10 on the supporting shaft holder at the two ends of brush roll 3, promptly brush roll 3 on supporting shaft holder 19 be installed on the slide of vertical and regulate motor 11 and drive by brush roll.Also can adopt manual mode, the brush roll 3 of wearing and tearing is remained on the medullary ray of pickled steel strip 2 operations.And phase paired support roll 4, then depressing cylinder 15 by one drives, be installed on the transportable sliding pair of upper-lower position, make pickled steel strip 2 when operation, a snap-in force be arranged all the time, thereby make brush roll 3 with pickled steel strip 2 relative movement be arranged when rotated.
Brush roll is regulated the control of the limitation of movement bit switch 23 of motor 11, and the mensuration of brush roll position signal is finished by brush roll location sensitive contact 22.
Produce the rapid wearing that the relative movement meeting causes rubber between the acid-resisting rubber on pickled steel strip 2 and support roll 4 cylindricals, for preventing this wearing and tearing, variable frequency vector control is adopted in the control of the velocity of rotation of support roll 4, the linear velocity of support roll 4 and the speed of pickled steel strip are consistent, the speed of rotation that brush roll 3 adopts is from 1～1000rpm, and the pressure of depressing cylinder 15 is 0.4Mpa.
For guaranteeing to realize moving up and down of all rollers, making things convenient for the position adjustments of each roller, the mode of connection of roller transmission shaft universal joint 18 is all adopted at support roll CD-ROM drive motor 9 and brush roll CD-ROM drive motor 16 are connected the roller transmission shaft 17 of usefulness with each roller two ends.
As shown in Figure 3, the invention still further relates to the acid washing method of the pickling installation employing of above-mentioned steel plate continuous casting and rolling process, its processing step is:
A, pickling: will through continuous casting and rolling rolling pickled steel strip 2 carry out pickling by the pickling tank 1 that fills acidic liquid;
B, extract: the pickled steel strip 2 that comes out from described pickling tank 1 is removed the acidic liquid of taking out of through squeezing roller 6 a pair of and its surface pressure close contact from pickling tank 1;
C, spray: adopt highly compressed to have weakly acidic liquid two surfaces of pickled steel strip 2 are sprayed, wash, highly compressed has the rinsing liquid of weakly acidic liquid from rinse tank 5;
D, brush surface: adopt to have to be shaped as strip or flaky, material is a brush roll 3 metal or nonmetallic bristle, contact and pickled steel strip 2 formation relative movement with a surface or two surfaces of pickled steel strip 2 with certain pressure, remove pickled steel strip 2 lip-deep impurity;
E, pinch: the pickled steel strip 2 after finish on pickling, spray and brush surface contacts and by the pinch roll 7 of pickled steel strip 2 direction of motion rotation through a pair of compressing with it, and by the driving force of its generation pickled steel strip 2 is sent to rinse tank 5:
F, rinsing: in rinse tank 5, pickled steel strip 2 is carried out rinsing, be sent to rolling mill production line then, cleaned the pipeline that the liquid that flows down is sent to spray with clear water.
In above-mentioned processing step, step c and steps d repeat repeatedly and hocket.
In conjunction with the accompanying drawings the present invention has been carried out exemplary description above; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present invention and technical scheme to carry out; or design of the present invention and technical scheme are directly applied to other occasion without improving, all within protection scope of the present invention.
Claims (2)
1, a kind of pickling installation of steel plate continuous casting and rolling process, comprise pickling tank (1), rinse tank (5), the direction of motion of pickled steel strip (2) is that pickling tank (1) is to rinse tank (5), between described pickling tank (1) and rinse tank (5), on a plane of pickled steel strip (2), establish the coarse brush roll of whole outer round surface (3), on its another surperficial same position, establish the support roll (4) of surface finishing and form a pair of brush roll group (12) with brush roll (3), all for contacting of certain pressure to be arranged, two roll axis are all vertical with the direction of motion of pickled steel strip (2) with pickled steel strip (2) for two rollers; Described brush roll group (12) is more than a pair of, and be that certain intervals ground distributes, describedly manyly to brush roll group (12) in the lip-deep distribution situation of pickled steel strip (2) be: on a surface of pickled steel strip (2), described brush roll (3) and support roll (4) are to be provided with at interval; Between each is to brush roll group (12), on the two sides of pickled steel strip (2), respectively establish a plurality of nozzles (14), and with brush roll (3) direction parallel with support roll (4) axis on be uniform distribution in line, establish a plurality of spray apertures on the described nozzle (14), and towards the surface of pickled steel strip (2), described nozzle (14) is connected with high-pressure water pipe, is highly compressed, the weakly acidic aqueous solution in the high-pressure water pipe; The two ends of described brush roll (3) are provided with brush roll setting device (10), and promptly the bearing support of brush roll (3) is installed on the slide of vertical and regulates motor (11) by brush roll and drives; The quantity of described brush roll (3) and support roll (4) equates; Describedly manyly to brush roll group (12) in the lip-deep distribution situation of pickled steel strip (2) be: on the upper surface of pickled steel strip (2), the total quantity of described brush roll (3) and support roll (4) is an odd number, and the quantity of brush roll (3) is more than support roll (4); The structure that it is characterized in that the outer round surface of described brush roll (3) is:
Described brush roll (3) is on whole outer round surface, the short metal strip that is covered with bunch shape, the one or both ends of each short metal strip and the cylindrical of brush roll (3) body are fastenedly connected, the transverse section of described metal strip is for circle or for the Polygons of rib is arranged, the material hardness of described metal strip is equal to or less than the material hardness of pickled steel strip (2);
Perhaps described brush roll (3) is on whole outer round surface, be covered with the little tinsel that on brush roll (3) external diameter direction, has circular arc, the cylindrical of described tinsel and brush roll (3) body is fastenedly connected, the direction of its lamellar body is along described brush roll (3) radially, and being parallel to the axis of brush roll (3), the material hardness of described tinsel is equal to or less than the material hardness of pickled steel strip (2);
Perhaps described brush roll (3) is covered with high-intensity nonmetallic or band on whole outer round surface, the cylindrical of its one or both ends and brush roll (3) body is fastenedly connected.
2, the acid washing method of a kind of pickling installation of steel plate continuous casting and rolling process as claimed in claim 1 employing is characterized in that the processing step of this acid washing method is:
A, pickling: will through continuous casting and rolling rolling pickled steel strip (2) continuously carry out pickling by the pickling tank (1) that fills acidic liquid;
B, extract: the pickled steel strip (2) that comes out from described pickling tank (1) is removed the acidic liquid of taking out of through squeezing roller (6) a pair of and its surface pressure close contact from pickling tank (1);
C, spray: adopt highly compressed to have weakly acidic liquid two surfaces of pickled steel strip (2) are sprayed, wash, highly compressed has the rinsing liquid of weakly acidic liquid from rinse tank 5;
D, brush surface: on a surface of pickled steel strip (2), described brush roll (3) and support roll (4) are to be provided with at interval; Employing has and is shaped as strip or flaky, material is brush roll metal or nonmetallic bristle (3), with surface of certain pressure and pickled steel strip (2) or two surfaces contact and with pickled steel strip (2) formation relative movement, remove the lip-deep impurity of pickled steel strip (2);
E, pinch: pickling, the pickled steel strip (2) that sprays and clean with water after finish on the surface contact and by the pinch roll (7) of pickled steel strip (2) direction of motion rotation through a pair of compressing with it, and by the driving force of its generation pickled steel strip (2) are sent to rinse tank (5);
F, rinsing: in rinse tank (5), pickled steel strip (2) is carried out rinsing, be sent to rolling mill production line then, cleaned the pipeline that the liquid that flows down is sent to spray with clear water;
Described step c and steps d repeat repeatedly and hocket.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101612015A CN100554523C (en) | 2006-12-18 | 2006-12-18 | A kind of pickling installation and acid washing method thereof of steel plate continuous casting and rolling process |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101612015A CN100554523C (en) | 2006-12-18 | 2006-12-18 | A kind of pickling installation and acid washing method thereof of steel plate continuous casting and rolling process |
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| CN100554523C true CN100554523C (en) | 2009-10-28 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102477523B (en) * | 2010-11-26 | 2013-05-29 | 宝山钢铁股份有限公司 | Brush roll horizontal adjusting device and its application method |
| CN102416409B (en) * | 2011-10-19 | 2014-01-01 | 中色科技股份有限公司 | Equipment for removing oil stain on surface of alloy plate |
| CN103469234B (en) * | 2013-09-10 | 2016-05-11 | 攀钢集团攀枝花钢钒有限公司 | Hot-strip pickled surface watermark control device and watermark control method |
| CN107447175A (en) * | 2017-09-15 | 2017-12-08 | 江苏大力神科技股份有限公司 | A kind of zinc-plated pre-treatment section acid dip pickle |
| CN109468653A (en) * | 2018-12-25 | 2019-03-15 | 江苏大力神科技股份有限公司 | A kind of separating device being mounted between descaling bath and rinsing bowl |
| CN111893501A (en) * | 2020-09-08 | 2020-11-06 | 马钢(合肥)板材有限责任公司 | Device and method for eliminating pickling parking spots |
| CN112962106A (en) * | 2021-01-29 | 2021-06-15 | 重庆望变电气（集团）股份有限公司 | Pickling equipment is used in silicon steel production |
| CN113430527B (en) * | 2021-06-03 | 2022-10-04 | 北京首钢股份有限公司 | Method for eliminating scratch defect of strip steel by acid cleaning |
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2006
- 2006-12-18 CN CNB2006101612015A patent/CN100554523C/en active Active
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| 鞍钢新轧冷轧2#生产线连续酸洗机组工艺段自动控制系统. 周业华.冶金自动化，第4期. 2004 |
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| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 243003 intellectual property department, technology center, No. 8 Hunan West Road, Yushan, Ma'anshan, Anhui Patentee after: Ma'anshan Iron and Steel Co., Ltd. Address before: 243003 technology center, Hunan West Road, Ma'anshan, Anhui, 8 Patentee before: Ma'anshan Iron and Steel Co., Ltd. |
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| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 243003 8 Jiuhua Road, Yushan, Ma'anshan, Anhui Patentee after: Ma'anshan Iron and Steel Co., Ltd. Address before: 243003 intellectual property department, technology center, No. 8 Hunan West Road, Yushan, Ma'anshan, Anhui Patentee before: Ma'anshan Iron and Steel Co., Ltd. |