CN102825234A - Judgment and alarm method for bonding breakout - Google Patents
Judgment and alarm method for bonding breakout Download PDFInfo
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- CN102825234A CN102825234A CN2012103613249A CN201210361324A CN102825234A CN 102825234 A CN102825234 A CN 102825234A CN 2012103613249 A CN2012103613249 A CN 2012103613249A CN 201210361324 A CN201210361324 A CN 201210361324A CN 102825234 A CN102825234 A CN 102825234A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000009749 continuous casting Methods 0.000 claims abstract description 13
- 238000005266 casting Methods 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- 238000012544 monitoring process Methods 0.000 abstract description 10
- 230000003111 delayed effect Effects 0.000 abstract 1
- 239000002699 waste material Substances 0.000 abstract 1
- 238000000605 extraction Methods 0.000 description 15
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000000630 rising effect Effects 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 230000010355 oscillation Effects 0.000 description 4
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000220317 Rosa Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
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Abstract
The invention provides a method for judging and alarming bonded breakout, which is characterized in that when a temperature curve displayed on a crystallizer temperature monitoring picture takes a certain thermocouple as a center or a starting point, the temperature curves of the thermocouples at two sides (or one side) are similar to the temperature curve of an alarming thermocouple, but the response time is changed in a delayed mode, and the temperature curves of all rows displayed on the crystallizer temperature monitoring picture are crossed, the bonded breakout is judged and an alarm is given. Meanwhile, the rapid speed reduction of the continuous casting machine enters a creeping state, the shell removal treatment is carried out on the blank shell in the crystallizer, and the pulling speed is slowly increased to the set pulling speed. The invention can greatly improve the alarm accuracy of bonding breakout, and reduce the alarm times and the rapid speed reduction times of the continuous casting machine, thereby avoiding the problems of deepening of vibration marks on the surface of the casting blank and reduction of the constant speed of the continuous casting machine caused by the rapid speed reduction of the casting machine, improving the productivity and the internal quality of the casting blank of the continuous casting machine, reducing the quantity of joint mark blanks and waste products, and improving the blank forming rate of continuous casting.
Description
Technical field
The invention belongs to the continuous casting process technical field, relate in particular to a kind of temperature detection curve that utilizes and judge the method whether bonding steel leakage is reported to the police and handled.
Background technology
Bonding steel leakage in the continuous casting process of billet withdrawal all occurs between casting blank shell and the crystallizer inwall copper coin, is a kind of bleed-out form of pilosity.Therefore, the bonding steel leakage warning device also arises at the historic moment.Promptly, judge through the distinctive variation tendency of temperature curve whether bonding steel leakage takes place through being installed in the variations in temperature of row of two on the crystallizer outer wall or three heat extraction galvanic couples monitoring crystallizer inwall.The temperature curve of its setting mainly contains three kinds:
1, temperature curve hysteresis a period of time of descend after the temperature curve of last heat extraction galvanic couple detection rises, next adjacent heat extraction galvanic couple detecting descends after rising, and upper and lower row's temperature curve intersects;
2, the temperature curve that detects of a last heat extraction galvanic couple directly descends and temperature curve that next adjacent heat extraction galvanic couple detects a period of time back of rising that lags behind descends, and upper and lower row's temperature curve intersects;
3, the temperature curve that detects of a last heat extraction galvanic couple rises simultaneously and descends with the temperature curve of adjacent next heat extraction galvanic couple detection, but upper and lower row's temperature curve does not intersect;
When any one situation in above-mentioned three kinds of situation appearred in temperature curve, the bonding steel leakage warning device just can be reported to the police.
In case the bonding steel leakage warning device is reported to the police, the conticaster speed that can plunge automatically gets into the state of creeping, and pulling rate moment is reduced to 0.1m/min; Not only cause the casting billet surface oscillation mark to be deepened, the strand internal soundness descends, and the conticaster constant speed reduces; But also can produce the lapping defect base, cause rejection number to increase.
Yet, find through a large amount of production practices, in whole alarm procedure, exist a large amount of false alarm phenomenons, the bonding steel leakage phenomenon does not promptly appear in the process of billet withdrawal.And because the existence of a large amount of false alarm phenomenons has caused low quality strand quantity to increase, the strand internal soundness descends, and the conticaster constant speed reduces, many negative effects such as rejection number increase.
Summary of the invention
The object of the invention aims to provide a kind of simple, can improve the accuracy of warning, thereby reduces the speed that plunges of conticaster, improves the operating rate of slab quality and conticaster, reduces the bonding steel leakage of rejection number and judges alarm method.
For this reason, the solution that the present invention taked is:
A kind of judgement alarm method of bonding steel leakage comprises continuous casting PLC and mould temperature monitored picture, and its concrete grammar is:
1, establishment is provided with warning curve decision procedure in continuous casting PLC, is added with the alarm temperature curve model in the warning curve decision procedure, and warning curve decision procedure is connected with casting machine warning system and mould temperature monitored picture.
2, judge warning:
A, to occur with a certain thermocouple be the center when mould temperature monitored picture temperature displayed curve; The thermocouple symmetry of same row both sides is similar with the temperature curve of a certain thermocouple to both sides appearance temperature curve; But the response time is retardation change one by one, and intersecting appears in the temperature curve of respectively arranging that the mould temperature monitored picture shows;
B, to occur with an end thermocouple be starting point when mould temperature monitored picture temperature displayed curve; And the inside one by one appearance temperature curve of the thermocouple of same row inboard is similar with the temperature curve of an end thermocouple; But the response time is retardation change one by one also, and intersecting appears in the temperature curve of respectively arranging that the mould temperature monitored picture shows;
During in above-mentioned two kinds of situation occurring any one, promptly predicate bonding steel leakage and report to the police immediately; Otherwise, will not report to the police.
3, when sending bonding steel leakage and reporting to the police, the warning curve decision procedure instruction conticaster speed that plunges gets into the state of creeping, and operating personnel survey base shell around the strand in the crystallizer, after confirming to have shelled, slowly promote pulling rate again to setting pulling rate.
Beneficial effect of the present invention is:
Compare with traditional type of alarm; The present invention can greatly improve the accuracy that bonding steel leakage is reported to the police; Reduce alarm times and the conticaster fast number of times that plunges, thereby avoid speed causes because casting machine plunges casting billet surface oscillation mark to deepen the problem that reduces with the conticaster constant speed, the production capacity and the strand internal soundness of raising conticaster; Reduce lapping defect base and rejection number, improve the continuous casting billet yield.
Description of drawings
Accompanying drawing is the representative temperature curve map that three row's monitoring thermocouple bonding steel leakages are reported to the police.
Among the figure: abscissa is the time, and ordinate is a temperature.1 is the temperature curve that the first heat extraction galvanic couple detects, and 2 is the temperature curve that a middle heat extraction galvanic couple detects, and 3 is the temperature curve that the 3rd heat extraction galvanic couple detects.The temperature curve that temperature profile in the middle of being positioned at detects for the warning thermocouple.
The specific embodiment
At first; Establishment is provided with warning curve decision procedure in continuous casting PLC; Be added with the alarm temperature curve model in the warning curve decision procedure, warning curve decision procedure is connected with the conticaster motor, and warning curve decision procedure is connected with casting machine warning system and mould temperature monitored picture.
Embodiment 1:
Production Ultra-low carbon steel grade, section are the 1550mm slab on slab caster.The crystallizer monitoring system is provided with three rows, 18 monitoring thermocouples of every row.
Open when watering 10 minutes at the 3rd jar; The mould temperature monitored picture shows temperature curve hysteresis a period of time rising back decline that decline, middle one was arranged and the 3rd heat extraction galvanic couple detects after the temperature curve of first heat extraction galvanic couple detection rose; And upper and lower row's temperature curve intersects; The temperature curve of observing the same heat extraction galvanic couple detection of both sides this moment does not meet the alarm temperature curve model of setting, the bonding steel leakage phenomenon occurs so be judged to be automatically, does not give warning.Also do not find the bonding vestige through inspection after strand rolls off the production line, explain and judge correct and effective.
Embodiment 2:
Production straight carbon steel kind, section are the 1500mm slab on slab caster.The crystallizer monitoring system is provided with three rows, 18 monitoring thermocouples of every row.
In the 4th jar of process of cast; Temperature curve 1 appearance rising back decline that the 7th thermocouple detects is arranged in first of mould temperature monitored picture demonstration; The temperature curve temperature 3 that the temperature curve 2 that a middle heat extraction galvanic couple detects and the 3rd heat extraction galvanic couple detect all lag behind a period of time occur rising after the decline phenomenon; And be the center with the 7th thermocouple; The temperature curve that the outside appearance temperature curve and first of the 6th, 5,4 and the 8th, 9,10 thermocouples symmetry of same row both sides is arranged the 7th thermocouple is similar; But the response time is retardation change one by one, and crossover phenomenon (shown in accompanying drawing) appears in three row's temperature curves that the mould temperature monitored picture shows, therefore judges the bonding steel leakage phenomenon takes place and to report to the police.
Report to the police simultaneously, the conticaster speed that plunges gets into the state of creeping, and operating personnel survey base shell around the strand in the crystallizer, find to have the bonding steel leakage phenomenon, after the treated shelling, slowly promote pulling rate to setting pulling rate.After strand rolled off the production line, finding had the bonding vestige, and the intensification of casting billet surface oscillation mark, explained and judged correct and effective.
Embodiment 3:
Production Ultra-low carbon steel grade, section are the 1550mm slab on slab caster.The crystallizer monitoring system is provided with three rows, 18 monitoring thermocouples of every row.
In the 3rd jar of process of cast; The mould temperature monitored picture shows that middle one arranges temperature curve 1 appearance rising back decline that the 1st thermocouple detects; First row and the 3rd ranked first a temperature curve that thermocouple detects a period of time back decline phenomenon that occurs rising that all lags behind; And it is similar that the temperature curve of the 1st thermocouple is arranged in three rows' the equal appearance temperature curve of the 2nd, 3,4 thermocouple and centre one; But the response time is retardation change one by one, and three row's temperature curves appearance intersections, and therefore judgement the bonding steel leakage phenomenon takes place and reports to the police.The conticaster speed that plunges gets into the state of creeping, and operating personnel survey base shell around the strand in the crystallizer, find to have the bonding steel leakage phenomenon, after the treated shelling, slowly promote pulling rate to setting pulling rate.After strand rolled off the production line, finding had the bonding vestige, and the intensification of casting billet surface oscillation mark, explained and judged correct and effective.
Claims (1)
1. the judgement alarm method of a bonding steel leakage comprises continuous casting PLC and mould temperature monitored picture, it is characterized in that:
(1), in continuous casting PLC the establishment warning curve decision procedure is set, be added with the alarm temperature curve model in the warning curve decision procedure, warning curve decision procedure is connected with casting machine warning system and mould temperature monitored picture;
(2), judge warning:
A, to occur with a certain thermocouple be the center when mould temperature monitored picture temperature displayed curve; The thermocouple symmetry of same row both sides is similar with the temperature curve of a certain thermocouple to both sides appearance temperature curve; But the response time is retardation change one by one, and intersecting appears in the temperature curve of respectively arranging that the mould temperature monitored picture shows;
B, to occur with an end thermocouple be starting point when mould temperature monitored picture temperature displayed curve; And the inside one by one appearance temperature curve of the thermocouple of same row inboard is similar with the temperature curve of an end thermocouple; But the response time is retardation change one by one also, and intersecting appears in the temperature curve of respectively arranging that the mould temperature monitored picture shows;
During in above-mentioned two kinds of situation occurring any one, promptly predicate bonding steel leakage and report to the police immediately; Otherwise, will not report to the police;
(3), when sending bonding steel leakage and reporting to the police, the warning curve decision procedure instruction conticaster speed that plunges gets into the state of creeping, operating personnel survey base shell around the strand in the crystallizer, after confirming to have shelled, slowly promote pulling rate again to setting pulling rate.
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| CN2012103613249A CN102825234A (en) | 2012-09-25 | 2012-09-25 | Judgment and alarm method for bonding breakout |
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| CN2012103613249A CN102825234A (en) | 2012-09-25 | 2012-09-25 | Judgment and alarm method for bonding breakout |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105511419A (en) * | 2014-09-25 | 2016-04-20 | 鞍钢股份有限公司 | Visual analysis method for temperature field of continuous casting crystallizer |
| CN105522133A (en) * | 2015-12-21 | 2016-04-27 | 安徽工业大学 | Judgment method of bonding behavior between continuous casting slab and crystallizer copper plate |
| CN108907129A (en) * | 2018-07-19 | 2018-11-30 | 首钢集团有限公司 | Steel leakage detection device and method |
| CN108971445A (en) * | 2018-07-19 | 2018-12-11 | 首钢集团有限公司 | Steel leakage detection device and method |
| CN111112567A (en) * | 2019-12-16 | 2020-05-08 | 河钢股份有限公司 | Comprehensive judgment method for breakout prediction of slab caster |
| CN111618265A (en) * | 2020-05-06 | 2020-09-04 | 大连理工大学 | Continuous casting billet longitudinal crack online detection method based on K nearest neighbor classification |
| CN111761040A (en) * | 2020-07-14 | 2020-10-13 | 五矿营口中板有限责任公司 | Method and device for online identifying reverse sequence of thermocouple installation of crystallizer breakout prediction system |
| CN112122573A (en) * | 2020-09-15 | 2020-12-25 | 山东钢铁集团日照有限公司 | Method for preventing blank shell from being detached after bonding alarm of ultra-wide slab continuous casting machine |
| CN113369451A (en) * | 2020-03-10 | 2021-09-10 | 中冶京诚工程技术有限公司 | Automatic monitoring method and device for bleed-out in continuous casting production |
| CN115090843A (en) * | 2022-06-14 | 2022-09-23 | 武汉钢铁有限公司 | Method for judging bonded bleed-out in continuous casting process |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105511419B (en) * | 2014-09-25 | 2018-02-27 | 鞍钢股份有限公司 | Visual analysis method for temperature field of continuous casting crystallizer |
| CN105511419A (en) * | 2014-09-25 | 2016-04-20 | 鞍钢股份有限公司 | Visual analysis method for temperature field of continuous casting crystallizer |
| CN105522133A (en) * | 2015-12-21 | 2016-04-27 | 安徽工业大学 | Judgment method of bonding behavior between continuous casting slab and crystallizer copper plate |
| CN105522133B (en) * | 2015-12-21 | 2018-04-06 | 安徽工业大学 | A kind of continuous casting billet bonds the decision method of behavior with copper plate of crystallizer |
| CN108907129A (en) * | 2018-07-19 | 2018-11-30 | 首钢集团有限公司 | Steel leakage detection device and method |
| CN108971445A (en) * | 2018-07-19 | 2018-12-11 | 首钢集团有限公司 | Steel leakage detection device and method |
| CN108971445B (en) * | 2018-07-19 | 2020-07-24 | 首钢集团有限公司 | Steel leakage detection device and method |
| CN111112567A (en) * | 2019-12-16 | 2020-05-08 | 河钢股份有限公司 | Comprehensive judgment method for breakout prediction of slab caster |
| CN113369451A (en) * | 2020-03-10 | 2021-09-10 | 中冶京诚工程技术有限公司 | Automatic monitoring method and device for bleed-out in continuous casting production |
| CN111618265A (en) * | 2020-05-06 | 2020-09-04 | 大连理工大学 | Continuous casting billet longitudinal crack online detection method based on K nearest neighbor classification |
| CN111618265B (en) * | 2020-05-06 | 2021-07-16 | 大连理工大学 | Continuous casting billet longitudinal crack online detection method based on K nearest neighbor classification |
| CN111761040B (en) * | 2020-07-14 | 2021-07-09 | 五矿营口中板有限责任公司 | Method and device for online identifying reverse sequence of thermocouple installation of crystallizer breakout prediction system |
| CN111761040A (en) * | 2020-07-14 | 2020-10-13 | 五矿营口中板有限责任公司 | Method and device for online identifying reverse sequence of thermocouple installation of crystallizer breakout prediction system |
| CN112122573A (en) * | 2020-09-15 | 2020-12-25 | 山东钢铁集团日照有限公司 | Method for preventing blank shell from being detached after bonding alarm of ultra-wide slab continuous casting machine |
| CN112122573B (en) * | 2020-09-15 | 2022-01-04 | 山东钢铁集团日照有限公司 | Method for preventing blank shell from being detached after bonding alarm of ultra-wide slab continuous casting machine |
| CN115090843A (en) * | 2022-06-14 | 2022-09-23 | 武汉钢铁有限公司 | Method for judging bonded bleed-out in continuous casting process |
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Application publication date: 20121219 |