CN102286751B - Method for judging pickling speed in cold rolling pickling technology - Google Patents
Method for judging pickling speed in cold rolling pickling technology Download PDFInfo
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- CN102286751B CN102286751B CN201110149992A CN201110149992A CN102286751B CN 102286751 B CN102286751 B CN 102286751B CN 201110149992 A CN201110149992 A CN 201110149992A CN 201110149992 A CN201110149992 A CN 201110149992A CN 102286751 B CN102286751 B CN 102286751B
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Abstract
The invention provides a method for judging a pickling speed in a cold rolling pickling technology and belongs to the technical field of pickling of cold rolling strips. A certain method is adopted to integrate the free acid concentration and Fe<2+> concentration which are measured in the pickling technology to obtain a total acid value, an application display interface is designed simultaneously, the value is displayed on the interface which can be viewed by an operator, and the control and operation of the pickling speed according to the free acid concentration and the total acid concentration are performed. The method has the following advantages: the total acid value is obtained through the integration which is according to a certain rule; and the total acid value is directly displayed for the operator, a quantitative judging rule is provided for the operator to ensure that the operator can judge and operate more intuitively and accurately, other related parameters can be adjusted timely, and the pickling quality of the product can be increased.
Description
Technical field
The invention belongs to cold rolled sheet pickling technical field, particularly relate to a kind of method of in cold-rolling pickling process, judging pickling speed.
Background technology
Roll in the production line in the acid of cold rolled sheet; The speed of the acid cleaning process of product directly has influence on the product surface pickling quality; The control of pickling speed mainly relies on the strip surface quality after artificial visual is judged pickling; And with reference to the free acid concentration and the total acid concentration value of off-line check chamber check, but there is following problem in general pickling line:
1, the surface quality behind artificial visually examine's the strip pickling can't quantize poor accuracy.
2, free acid concentration value can directly be measured through online surveying instrument, but total acid value is directly not have measuring appratus directly to measure through online.
3, the measurement of total acid value needs just can obtain after the off-line check, causes and produces upward serious hysteresis of line judgement pickling speed time, can't accurately control pickling speed.
4, acid cleaning process section operative employee can't directly obtain from operation interface, therefore, in actual production process, can't make the operator carry out the speed adjustment in time, intuitively, and the pickled surface quality can't in time be guaranteed.
5, do not utilize the quantized decision method of the pickling speed of free acid number and total acid value.
Seek and a kind ofly can onlinely obtain total acid value, and can quantize the method for free acid number and total acid value decision rule, directly perceived with feed back to the operator in time, really, make the operator have stronger operability.
Summary of the invention
The object of the present invention is to provide a kind of method of in cold-rolling pickling process, judging pickling speed; In the acid cleaning process production process; Utilize free acid number and the iron ion detected value of on-line measurement to obtain total acid value, and with total acid value real-time be shown to the operative employee, the operative employee is according to the free acid number and the total acid value that show in real time; Carry out the judgement of pickling speed according to certain decision rule; Overcome time lag, the operative employee can't grasp total acid value in time, intuitively, the control pickling speed, thus influence the problem of product surface pickling quality.Have characteristics simply, conveniently and intuitively.
Process step of the present invention does
(1) the free acid number appearance of online detection and Fe ion detection appearance carry out value from the scene: free acid number appearance span: 0-100g/l, Fe ion detection appearance span: 0-200g/l
(2) at slim calculator of automation system inediting of production scene, the input of counter:
X1: free acid number; X2:Fe ion detection value,
Counter by formula calculates: total acid value=1.3036*C
Fe(ferrous ion concentration)+HCl (free acid), output Y: total acid value;
(3) display interface of a total acid value of design on the man-machine dialog interface of production line, interface dimensions and shape: the little square frame of the wide 10mm of long 20mm*;
Interface display position: the total degree of the free acid display box top that is presented at the interface
Interface input: the output Y (total acid value) of slim calculator.
(4), formulate different steel grades carry out pickling speed according to free acid, total acid value control law:
The invention has the advantages that; Integration through according to certain rule obtains total acid value; Simultaneously can total acid value directly be shown to the operative employee, and make the operative employee that quantized decision rule arranged, make the more intuitive and accurate judgement of operator, operation; Guarantee other correlation parameter of adjustment in time, improve the product pickling quality.
Embodiment
Produce line in normal productive process, integrate out total acid value (total acid value=free acid+Fe automatically through free acid and Fe ion detection value
2+* 1.28), be simultaneously displayed on the interface, the operator carries out the control and the adjustment of pickling speed according to this value according to rule request, and to the judgement of product surface quality behind sour Xian.
Application example:
Certain factory's acid cleaning process section, carry out the pickling speed control of different thickness, different steel grade products according to producing the detected free acid concentration of line with the total acid concentration value:
Steel grade: H420LA; The hot rolling reeling temperature is 578 ℃; Product thickness is: 4.5mm; The 12:30 on-line detector shows free acid concentration 58g/l and total acid 230g/l in the class, and the pickling speed upper limit is controlled to be when the 14:30 on-line detector shows total acid 173g/l in the 180mpm. class, and the pickling speed upper limit is controlled to be 150mpm.
Steel grade: DC03; The hot rolling reeling temperature is 758 ℃; Product thickness is: 4.5mm; The 10:30 on-line detector shows free acid concentration 60g/l and total acid 210g/l in the class, and when the pickling speed upper limit was controlled to be in the 160mpm. class 15:30 on-line detector and shows free sour 33g/l, the pickling speed upper limit was controlled to be 140mpm.
Claims (2)
1. the steel grade of 300 ℃-700 ℃ of coiling temperatures is judged the method for pickling speed in cold-rolling pickling process, and it is characterized in that: process step is:
(1) the free acid number appearance of online detection and Fe ion detection appearance carry out value from the scene: free acid number appearance span: 0-100g/l, Fe ion detection appearance span: 0-200 g/l
(2) at slim calculator of automation system inediting of production scene, the input of counter:
C
FeBe ferrous ion concentration, HCl is free acid concentration,
Counter by formula calculates: total acid value Y=1.3036* C
Fe+ HCl;
Output total acid value Y;
(3) display interface of a total acid value of design on the man-machine dialog interface of production line, interface dimensions and shape:
The little square frame of the wide 10mm of long 20mm*;
Interface display position: the total degree of the free acid display box top that is presented at the interface
Interface input: the output total acid value Y of slim calculator;
(4) steel grade of formulating 300 ℃-700 ℃ of coiling temperatures carries out the control law of pickling speed according to free acid, total acid value:
When free acid concentration 45g/l-100 g/l and total acid 190g/l-360/l:
Thickness range: 4.0mm-6.0mm, the pickling speed span of control: 10 mpm-180mpm,
Thickness range: 1.6mm-3.99mm, pickling speed span of control: 10 mpm-230mpm;
When free acid concentration 0-44.9g/l or total acid 100 g/l-189.9g/l:
Thickness range: 4.0mm-6.0mm, the pickling speed span of control: 10 mpm-150mpm,
Thickness range: 1.6mm-3.99mm, pickling speed span of control: 10 mpm-190mpm.
2. the steel grade that coiling temperature according to claim 1 is 300 ℃-700 ℃ is judged the method for pickling speed in cold-rolling pickling process, it is characterized in that: in the step (4):
When free acid concentration 45g/l-100 g/l and total acid 190g/l-360/l:
Thickness range: 4.0mm-6.0mm, the pickling speed span of control: 10 mpm-160mpm,
Thickness range: 1.6mm-3.99mm, pickling speed span of control: 10 mpm-190mpm;
When free acid concentration 0-44.9g/l or total acid 100 g/l-189.9g/l:
Thickness range: 4.0mm-6.0mm, the pickling speed span of control: 10 mpm-140mpm,
Thickness range: 1.6mm-3.99mm, pickling speed span of control: 10 mpm-170mpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110149992A CN102286751B (en) | 2011-06-04 | 2011-06-04 | Method for judging pickling speed in cold rolling pickling technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110149992A CN102286751B (en) | 2011-06-04 | 2011-06-04 | Method for judging pickling speed in cold rolling pickling technology |
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| CN102286751A CN102286751A (en) | 2011-12-21 |
| CN102286751B true CN102286751B (en) | 2012-10-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10274975B2 (en) | 2012-11-30 | 2019-04-30 | Baoshan Iron & Steel Co., Ltd. | Method and apparatus for controlling acid concentration for pickling in cold rolling |
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| CN104451723B (en) * | 2014-10-16 | 2017-02-01 | 武汉钢铁(集团)公司 | Method for improving acid washing efficiency and quality of hot rolled strip steel |
| 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 |
| CN107541737B (en) * | 2016-06-27 | 2019-07-23 | 宝山钢铁股份有限公司 | The method for improving belt steel surface pickling quality |
| CN108342741B (en) * | 2018-03-26 | 2019-11-05 | 泰兴市东城水处理工程有限公司 | A kind of method for surface treating copper foil |
| 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 |
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| CN101570864A (en) * | 2009-06-10 | 2009-11-04 | 武汉钢铁(集团)公司 | Method for controlling band steel sag for pickling bath |
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| JPS5847469B2 (en) * | 1976-08-02 | 1983-10-22 | 住友重機械工業株式会社 | Loop control method for steel strip in pickling tank |
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| JPH01288558A (en) * | 1988-05-17 | 1989-11-20 | Mitsubishi Electric Corp | Process speed controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US10274975B2 (en) | 2012-11-30 | 2019-04-30 | Baoshan Iron & Steel Co., Ltd. | Method and apparatus for controlling acid concentration for pickling in cold rolling |
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Application publication date: 20111221 Assignee: BEIJING SHOUGANG COLD ROLLING THIN PLATE CO., LTD. Assignor: Capital Iron & Steel General Company Contract record no.: 2015990001019 Denomination of invention: Method for judging pickling speed in cold rolling pickling technology Granted publication date: 20121010 License type: Common License Record date: 20151209 |
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Address after: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee before: Capital Iron & Steel General Company |