CN111020683A - Automatic control method for electrolytic current of stainless steel plate with pickling - Google Patents
Automatic control method for electrolytic current of stainless steel plate with pickling Download PDFInfo
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- CN111020683A CN111020683A CN201911158600.XA CN201911158600A CN111020683A CN 111020683 A CN111020683 A CN 111020683A CN 201911158600 A CN201911158600 A CN 201911158600A CN 111020683 A CN111020683 A CN 111020683A
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- pickling
- electrolytic
- stainless steel
- current
- electrolytic current
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
- C25F1/02—Pickling; Descaling
- C25F1/04—Pickling; Descaling in solution
- C25F1/06—Iron or steel
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating
Abstract
The invention relates to the field of stainless steel cold continuous rolling production lines. In particular to an automatic control model for the electrolytic current of the pickling of a cold continuous rolling stainless steel plate. An automatic control method for electrolytic current of pickling of stainless steel plates comprises the following steps: the first step is as follows: determining the effective length of electrolysis, namely the cathode treatment length: the second step is that: obtaining various parameters of raw materials: the third step: determining the strip steel pickling area: the fourth step: determining an electrolysis current density set value: the fifth step: current density proportionality coefficient: and a sixth step: determining the acid washing electrolysis current: the seventh step: realizing automatic setting and use of electrolytic current. The electrolytic current can be automatically given by a mathematical model according to different steel grades and different speeds, the labor intensity of operators is reduced, and the pickling efficiency is improved.
Description
Technical Field
The invention relates to the field of stainless steel cold continuous rolling production lines. In particular to an automatic control model for the electrolytic current of the pickling of a cold continuous rolling stainless steel plate.
Background
The electrolysis is used as a link in the stainless steel pickling process and plays an important role in the whole pickling process. One of the main factors influencing the electrolysis effect is the electrical parameters (voltage, current density, electrolysis time). For a stainless steel cold continuous rolling production line, a continuous rolling machine is directly connected with an annealing and pickling section, and in order to ensure the surface treatment effect of strip steel during high-speed production of thin materials, the electrolytic treatment section is designed to be longer, and the number of rectifier cabinets is large. There is a large margin in electrolytic capacity for thick stock. If all the electrolytic cabinets are put into production and electrolytic treatment is carried out according to a fixed electrolytic current value, great energy waste is caused.
Therefore, a model for automatically adjusting the electrolytic current along with the change of the production line speed is required to be added in the pickling digital-analog control. So as to achieve the purposes of automatically adjusting the electrolytic current after the running speed of the strip steel changes, simultaneously ensuring the pickling surface quality of the strip steel and reducing the electric energy consumption.
Disclosure of Invention
The implementation of the invention is to adjust the electrolytic current in real time according to the change of the production speed of the strip steel and reduce the power consumption on the premise of ensuring the surface quality of the pickled strip steel. The given method of the electrolytic current, the electrolytic current density of various steel types and the current density proportionality coefficient values under different speeds are built in a control system of a production line, and in the actual production, along with the continuous change of the steel types and speeds, the automatic control model can automatically adjust the electrolytic current along with the change of the electrolytic current density and speeds and can ensure the surface quality of the strip steel during acid cleaning.
The technical scheme of the invention is realized as follows: an automatic control method for electrolytic current of pickling of stainless steel plates comprises the following steps:
the first step is as follows: determining the effective length of electrolysis, namely the cathode treatment length:
for electrolytic pickling of stainless steel, surface oxide scales are mainly removed at a cathode, the electrolysis time is in a linear relation with the length of the cathode, and the effective length of an electrolytic cell is represented by C in the method.
The second step is that: obtaining various parameters of raw materials:
and transmitting various parameters such as the steel type, the width, the thickness and the like of the steel coil to a production line control system through a Manufacturing Execution System (MES), wherein the width of the raw material steel strip is represented by W in the method.
The third step: determining the strip steel pickling area:
for continuously produced stainless steel strip, the area during electrolytic pickling is the cathodic treatment length C multiplied by the strip width W, i.e., W C.
The fourth step: determining an electrolysis current density set value:
according to the characteristics of different steel grades, different current density values are respectively set for the steel grades during electrolytic pickling, and Ds represents the electrolytic current density in the method.
The fifth step: current density proportionality coefficient:
for pickling strip steel at different speeds, different proportion parameters are set, so that the electrolytic current is automatically adjusted along with the change of the running speed of the strip steel, and the current density proportion coefficient is represented by P in the method.
And a sixth step: determining the acid washing electrolysis current:
in the method, I denotes an electrolytic current, I = (Ds × P) × W × C.
The seventh step: realizing automatic setting and use of electrolytic current.
Further, for a stainless steel strip pickling line, the cathode length is a fixed value in relation to the equipment.
Further, the electrolytic current I is automatically adjusted according to the change of the production speed of the strip steel.
Further, Ds is set differently according to different characteristics of various steels.
Furthermore, the value of P is different according to different pickling speeds.
Furthermore, the purpose of automatically adjusting the electrolytic current under different steel grades and different production speeds is achieved by setting the current density set value Ds and the proportionality coefficient P in the model.
The invention has the beneficial effects that:
(1) reduce the electric energy consumption in the electrolytic process.
(2) The consistency of the surface of the strip steel is good.
(3) The electrolytic current can be automatically given by a mathematical model according to different steel grades and different speeds, the labor intensity of operators is reduced, and the pickling efficiency is improved.
Detailed Description
The conventional stainless steel electrolysis process is set to use a fixed electrolysis current value or a fixed electrolysis current density according to production experience and different steel grades. The invention combines the design parameters of the electrolysis section of the production line to summarize the following models:
I= (Ds×P)×W×C
in the formula:
w is the actual width of the strip steel;
c is the effective electrolysis length of each electrolytic cell, namely the cathode treatment length;
ds is a current density set value which is different according to different characteristics of various steel types;
p is a proportionality coefficient, and the coefficient values are different according to different pickling speeds.
The invention has the technical characteristics that:
1. the electrolytic current is automatically adjusted according to the change of the production speed of the strip steel.
2. The purpose of automatically adjusting the electrolytic current under different steel grades and different production speeds is achieved by setting the current density set value Ds and the proportionality coefficient P in the model.
3. The current density set value Ds and the proportionality coefficient P in the model.
The invention relates to an automatic control model for pickling electrolytic current by using stainless steel plates and strips, which aims at different steel types, and the electrolytic current is automatically adjusted according to the change of the production speed of strip steel; the current density Ds and the proportionality coefficient P in the model are preset, so that the purposes of automatically adjusting the electrolytic current under different steel types and different production speeds and reducing the power consumption on the premise of ensuring the surface pickling quality of the strip steel can be achieved, and the surface pickling quality of the strip steel can be ensured.
Example one
In this example, a stainless steel material roll of SUS304 grade was selected, the width was 1250mm, and the production line was a cold continuous rolling annealing pickling line of Tai steel.
The first step is as follows: determining the effective length of electrolysis, namely the cathode treatment length:
for this line, the neutral salt electrolysis cathodes consisted of 6 electrode plates with a width of 160mm, each cell containing two cathodes, and the effective cell length C was therefore 1920mm, i.e. 19.2dm (decimeter).
The second step is that: obtaining various parameters of raw materials:
the steel grade of the steel coil is SUS304, and the width W of the raw material is 1250mm, namely 12.5 dm.
The third step: determining the strip steel pickling area:
the strip steel pickling effective area W × C =19.2dm × 12.5dm =240 dm.
The fourth step: determining an electrolysis current density set value:
in the method, for SUS304 steel, an automatic control model is internally provided with an electrolytic current density Ds of 18A/dm.
The fifth step: current density proportionality coefficient:
in the present method, P is a proportionality coefficient related to speed, which is shown in the following table.
And a sixth step: determining the acid washing electrolysis current;
electrolytic current I = (Ds × P) × W × C;
the seventh step: the automatic setting and use of the electrolytic current are realized;
through the steps, the stainless steel raw material roll with the mark of SUS304 and the width of 1250mm can be obtained, the electrolytic current value is obtained at different running speeds, the setting of the current value is automatically used by the automatic control model, and the surface quality of the strip steel pickling can be completely guaranteed.
The above embodiments are only some of the embodiments of the present invention, but the spirit of the present invention is not limited thereto, and any changes or modifications within the scope of the present invention by those skilled in the art are covered by the claims of the present invention.
Claims (6)
1. An automatic control method for electrolytic current of stainless steel plate with acid washing is characterized in that: the method comprises the following steps:
the first step is as follows: determining the effective length of electrolysis, namely the cathode treatment length;
for stainless steel electrolytic pickling, surface oxide skin is mainly removed at a cathode, the electrolysis time and the length of the cathode are in a linear relationship, and C represents the effective length of an electrolytic bath in the method;
the second step is that: obtaining various parameters of raw materials;
transmitting various parameters such as steel type, width, thickness and the like of the steel coil to a production line control system through a manufacturing execution system, wherein W represents the width of a raw material steel strip in the method;
the third step: determining the strip steel pickling area;
for continuously produced stainless steel strips, the area in the electrolytic pickling process is the cathode treatment length C multiplied by the strip steel width W, namely W multiplied by C;
the fourth step: determining an electrolysis current density set value;
according to the characteristics of different steel grades, different current density values are respectively set for the steel grades during electrolytic pickling, and Ds represents the electrolytic current density in the method;
the fifth step: a current density proportionality coefficient;
setting different proportion parameters for pickling strip steel at different speeds, and realizing automatic adjustment of electrolytic current after the running speed of the strip steel changes, wherein the current density proportion coefficient is represented by P in the method;
and a sixth step: determining the acid washing electrolysis current;
in the method, I is used for representing electrolytic current, namely I = (Ds multiplied by P). times.W multiplied by C;
the seventh step: realizing automatic setting and use of electrolytic current.
2. The automatic control method of electrolytic current for pickling stainless steel plate according to claim 1, characterized in that: for a stainless steel strip pickling line, the cathode length is a fixed value related to the equipment.
3. The automatic control method of electrolytic current for pickling stainless steel plate according to claim 1, characterized in that: the electrolytic current I is automatically adjusted according to the change of the production speed of the strip steel.
4. The automatic control method of electrolytic current for pickling stainless steel plate according to claim 1, characterized in that: ds is set differently according to different characteristics of various steels.
5. The automatic control method of electrolytic current for pickling stainless steel plate according to claim 1, characterized in that: p has different values according to different pickling speeds.
6. The automatic control method of electrolytic current for pickling stainless steel plate according to claim 1, characterized in that: the purpose of automatically adjusting the electrolytic current under different steel grades and different production speeds is achieved by setting the current density set value Ds and the proportionality coefficient P in the model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911158600.XA CN111020683A (en) | 2019-11-22 | 2019-11-22 | Automatic control method for electrolytic current of stainless steel plate with pickling |
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| CN201911158600.XA CN111020683A (en) | 2019-11-22 | 2019-11-22 | Automatic control method for electrolytic current of stainless steel plate with pickling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113215645A (en) * | 2021-05-14 | 2021-08-06 | 浦项(张家港)不锈钢股份有限公司 | Electrolytic current control method and device for cold-rolled stainless steel annealing and pickling line |
| CN113235155A (en) * | 2021-04-29 | 2021-08-10 | 江苏兴达钢帘线股份有限公司 | Electrolytic pickling current-stabilizing control system for tire bead steel wire production line |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1486373A (en) * | 2000-12-18 | 2004-03-31 | �������Ĺɷ�����˾ | Continuous electrolytic pickling and descaling of carbon steel and stainless steel |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1486373A (en) * | 2000-12-18 | 2004-03-31 | �������Ĺɷ�����˾ | Continuous electrolytic pickling and descaling of carbon steel and stainless steel |
Non-Patent Citations (1)
| Title |
|---|
| 陈戈: "不锈钢酸洗线自动控制系统的开发", 《机械管理开发》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113235155A (en) * | 2021-04-29 | 2021-08-10 | 江苏兴达钢帘线股份有限公司 | Electrolytic pickling current-stabilizing control system for tire bead steel wire production line |
| CN113235155B (en) * | 2021-04-29 | 2022-11-01 | 江苏兴达钢帘线股份有限公司 | Electrolysis pickling current-stabilizing control system for tire bead steel wire production line |
| CN113215645A (en) * | 2021-05-14 | 2021-08-06 | 浦项(张家港)不锈钢股份有限公司 | Electrolytic current control method and device for cold-rolled stainless steel annealing and pickling line |
| CN113215645B (en) * | 2021-05-14 | 2022-07-05 | 浦项(张家港)不锈钢股份有限公司 | Electrolytic current control method and device for cold-rolled stainless steel annealing and pickling line |
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Application publication date: 20200417 |