CN103464712B - The stagnant base processing method of a kind of sheet billet continuous casting - Google Patents
The stagnant base processing method of a kind of sheet billet continuous casting Download PDFInfo
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Abstract
Provide the stagnant base processing method of a kind of sheet billet continuous casting, described method comprises once form stagnant base, first the reason confirming to form stagnant base is checked, which kind of determine to adopt secondary cooling water and two cold air control methods, again for stagnant base Crack cause, select suitable stagnant base processing method, sheet billet continuous casting of the present invention stagnant base processing method can according to the stagnant base of actual conditions fast processing, to shorten the accident treatment time, and check in time the defect of casting machine equipment, to reduce loss that accident brings and to avoid causing batch slab quality accident.
Description
Technical field
The present invention relates to continuous casting technical field, particularly relate to the stagnant base processing method of a kind of sheet billet continuous casting.
Background technology
Current domestic and international most of slab caster capital equipment comprises: crystallizer, 0# section, fan-shaped section (1-13 section).General fan-shaped section 1-7 section is all segmental arc, and 8-13 section is all horizontal segment.Sheet billet continuous casting machine production line, along with the raising of output and operating rate, unavoidably there will be " stagnant base " problem in actual production process, and puzzlement is normally produced.
Sheet billet continuous casting, once form stagnant base, must adopt suitable processing method, is pulled out by strand in time or hangs out casting machine runner, to alleviate the damage of stagnant base to equipment.If stagnant base processing method is improper, much harm can be produced.If the processing time is long, then have a strong impact on caster work rate.If stagnant base is dealt with improperly, then major injury casting machine device systems, for ensureing that slab quality controls, must take a long time and carry out large number quipments replacing, thus causes serious equipment loss.If after stagnant base accident treatment, be not checked through casting machine equipment deficiency in time, batch strand accident so will be caused in subsequent production process.
Summary of the invention
The invention provides the stagnant base processing method of a kind of sheet billet continuous casting, to solve stagnant base accident in time when there is continuous casting production accident, improve caster work rate, sheet billet continuous casting of the present invention stagnant base disposal methods time controling within 200min, and does not damage fan-shaped section.
The object of the invention is to control the secondary cooling water after forming stagnant base in sheet billet continuous casting production process and two cold air, guarantee that the strand of crystallizer and 0# section solidifies completely and do not cause strand serious excessively cold, for the process of stagnant base provides precondition, then suitable processing method taked by the stagnant base formed according to different reason, shorten the stagnant base accident treatment time, reduce stagnant base accident treatment to the damage of continuous casting machine, reach the loss reducing stagnant base accident and bring.
According to an aspect of the present invention, provide the stagnant base processing method of a kind of sheet billet continuous casting, described method comprises: the stagnant base process that (a) bleed-out, the similar reasons such as steel of overflowing are formed, by certain pulling rate, secondary cooling water water distribution is carried out to crystallizer and 0# section, the controlled cooling model time, fan-shaped section stops joining secondary cooling water and two cold air; Promote sector-segment frames, strand is pulled out or hangs out; B the stagnant base process having the similar reasons such as foreign matter to be formed between the distortion of () fan-shaped section, excessively cold, the roller of strand, shuts down, carries out secondary cooling water water distribution, the controlled cooling model time by certain pulling rate; Promote screwdown driving roller or sector-segment frames, casting base is pulled out or hangs out; The stagnant base process of c reason formation that () fan-shaped section casting blank bulging etc. are similar, shuts down, carries out secondary cooling water water distribution, the controlled cooling model time by certain pulling rate; Promote sector-segment frames, casting base is pulled out or hangs out.
Under the stagnant base disposition that bleed-out, the similar reasons such as steel of overflowing are formed, crystallizer and 0# section carry out two cold water distributions by 0.6m/min pulling rate, and the water distribution time presses 10-20min and controls, and 1-13 section fan-shaped section stops joining secondary cooling water and two cold air.
When the stagnant base process having the similar reasons such as foreign matter to be formed when between fan-shaped section distortion, excessively cold, the roller of strand, carry out secondary cooling water water distribution by 0.5m/min pulling rate, press 10-15min control cool time.
When the stagnant base process that the similar reasons such as fan-shaped section casting blank bulging are formed, carry out secondary cooling water water distribution by 0.5m/min pulling rate, press 10-15min cool time and control.
If when the strand forming stagnant base needs to split, secondary cooling water and two cold air 100% are opened, press 10-15min cool time and control.
Form stagnant base for bleed-out, the similar reason such as steel of overflowing, promote sector-segment frames, between 0# section and 1# section, split strand, 0# section and crystallizer band strand hang out, 1# section and the later strand pull-out of 1# section.
For the stagnant base having the similar reasons such as foreign matter to be formed between fan-shaped section distortion, excessively cold, the roller of strand, throwing or throwing after promoting pressure sector-segment frames after promoting screwdown driving roller.
For the stagnant base that the similar reasons such as fan-shaped section casting blank bulging are formed, throwing after lifting sector-segment frames.
When strand draws motionless, first shut down, promote screwdown driving roller, or promote pressure sector-segment frames simultaneously, after pulling strand, casting speed controls by 1.7m/min-2.0m/min.
The process of stagnant base caused described bleed-out, the steel that overflows is included in segmental arc and strand separates by horizontal segment separation position, is pulled out by casting base or hangs out.
The processing method of the stagnant base of described sheet billet continuous casting also comprises; When horizontal segment afterbody is with arc strand, arc strand controls to send strand speed by 0.3m/min-0.5m/min, when more than 1# section 1m sent by strand, hangs out strand.
Detailed description of the invention
By analyzing stagnant base Crack cause, generally speaking, stagnant base Crack cause have following some:
1, when casting machine generation bleed-out or excessive steel accident, process cold steel overlong time, cannot normally pull out strand and form stagnant base.
Accumulated slag or fall into foreign matter and cannot normally pull out strand and form strand between 2, casting machine fan-shaped section distortion, strand excessively cold, roller.
3, fan-shaped section hydraulic system decompression causes casting blank bulging normally to pull out strand and to form stagnant base.
But, the present invention is not limited thereto, under the scope not departing from the present invention's design, other Crack cause of stagnant base can be sorted out according to above-mentioned three kinds of large class reasons, and carry out subsequent treatment.
Sheet billet continuous casting, once form stagnant base, must take suitable processing method, is pulled out by strand in time or hangs out casting machine runner, to alleviate the damage of stagnant base to equipment.If stagnant base processing method is improper, its main harm comprise following some:
1, the processing time is long, has a strong impact on caster work rate.
2, major injury casting machine device systems, particularly copper plate of crystallizer and fan-shaped section roll damage, for ensureing that slab quality controls, must take a long time and carry out large number quipments replacing, thus causes serious equipment loss, reduces caster work rate simultaneously.
If be not checked through casting machine equipment deficiency in time after 3 stagnant base accident treatment, batch slab quality accident in postorder production process, will be caused.
Below in conjunction with the reason drawn by the analysis to sheet billet continuous casting production process, describe the classification treatment step to stagnant base in detail.
After stagnant base is formed, secondary cooling water, two cold air are controlled, for stagnant base accident treatment provides good precondition, concrete control method comprises: the stagnant base of (1) bleed-out, the formation such as steel of overflowing, and crystallizer and 0# section carry out two cold water distributions by the casting speed of 0.6m/min, in order to ensure that strand afterbody molten steel solidifies completely, the water distribution time presses 10-20min and controls, meanwhile, prevent the strand of 1-13 section fan-shaped section excessively cold, stop joining secondary cooling water and two cold air to 1-13 section fan-shaped section.(2) the stagnant base having foreign matter etc. to cause between fan-shaped section distortion, excessively cold, the roller of strand, when processing stagnant base, in order to reduce strand temperature in fan-shaped section, avoid high temperature strand to the damage of equipment, secondary cooling water presses the water distribution of 0.5m/min pulling rate, presses 10-15min cool time and controls.(3) the stagnant base that the reason that fan-shaped section casting blank bulging etc. are similar is formed, first shut down, secondary cooling water presses 0.5m/min water distribution, presses 10-15min cool time and controls; Promote sector-segment frames, with withdrawal straightening machine, casting base pulled out or hang out with crane.
In addition, if when the origin cause of formation of the stagnant base of above-mentioned three major types, if when the strand forming stagnant base needs to split, in order to reduce fan-shaped section strand temperature as early as possible, then secondary cooling water and two cold air 100% being opened, pressing 10-15min cool time and controlling, because strand divides clipping time long, therefore in order to avoid high temperature strand during strand segmentation is to the damage of equipment, secondary cooling water and two cold air 100% to be opened, and the corresponding controlled cooling model time.
In addition, before slab is processed, check and confirm whether fan-shaped section has roll breakage, bearing block overturning, accumulated slag, residual steel foreign matter etc. to hinder throwing, to determine to take rational stagnant base processing method.Such inspection is conducive to being checked through casting machine equipment deficiency in time, thus avoids the slab quality accident causing batch in postorder production process.
Below in conjunction with concrete example embodiment, the concrete processing mode that stagnant base processes is described in detail.The concrete processing mode that stagnant base processes is comprised:
(1) bleed-out, excessive steel etc. cause the processing mode of stagnant base.After forming stagnant base, if do not need to cut stagnant base, then carry out two cold water distributions to crystallizer and 0# section by 0.6m/min pulling rate, the water distribution time presses 10-20min and controls, and fan-shaped section stops joining secondary cooling water and two cold air, is then pulled out by stagnant base with withdrawal straightening machine.If stagnant base needs to cut, secondary cooling water and two cold air 100% are opened, press 10-15min cool time to control, promote 1# segment frames, guaranteeing to split strand between 0# section and 1# section with flame accident rifle under the prerequisite not damaging 1# section roller, after strand cuts off, 0# section and above strand crane hang out, and 1# section and later strand adopt startup withdrawal straightening machine to pull out.If 1# section and later strand draw motionless, hard stop, first promote screwdown driving roller, again start withdrawal straightening machine, if still draw motionless, first promote pressure sector-segment frames, again start withdrawal straightening machine.Rear casting speed is pulled to control by 1.7m/min-2.0m/min, fast strand is pulled out fan-shaped section.If after stagnant base is formed because of the processing time or equipment long for recovery time, strand is serious excessively cold, strand is caused to pull out fan-shaped section, then again strand is separated between 6# section and 7# section, if conditions permit, preferably from (i.e. segmental arc and horizontal segment separation position) between 7# section and 8# section, strand is separated.But the present invention is not limited thereto, according to the needs in actual production process, between two adjacent fan-shaped section, stagnant base can be cut, so that pull out or hang out fan-shaped section flexiblely.Wherein, the horizontal segment strand in fan-shaped section adopts and starts withdrawal straightening machine pull-out fan-shaped section, if afterbody is with arc strand, during drop-down strand, Bian Labian carries sector-segment frames and dodges bending strand.Arc strand adopt send from hang out with crane, send strand speed to control by 0.3m/min-0.5m/min, when more than 1# section 1m sent by strand, entangle strand with steel cable, then with crane with strand send crawl lifting cooperation hang out strand.
(2) the processing mode of non-bleed-out, the stagnant bases of formation such as steel that overflow.Different from the processing mode that bleed-out, the steel that overflows form stagnant base, in general the stagnant base in this case formed is divided into two kinds of situations:
Accumulated slag or fall into foreign matter and cause stagnant base between 1. fan-shaped section distortion, strand excessively cold, roller.For this situation, first shut down, secondary cooling water presses 0.5m/min water distribution, presses 10-15min cool time and controls, and then turns accident throwing mode and promotes throwing after screwdown driving roller and maybe liftings is depressed throwing after sector-segment frames, avoid throwing by force to cause equipment damage.
2. the stagnant base that the casting blank bulging that fan-shaped section hydraulic system decompression causes causes.First shut down, secondary cooling water presses 0.5m/min water distribution, presses 10-15min cool time and controls, then turn accident throwing mode throwing, in process of billet withdrawal, promotes sector-segment frames dodge at bulge point.
For the mode of the stagnant base process that non-bleed-out, the steel that overflows are formed, if when stagnant base needs to cut, with above-mentioned described similar, secondary cooling water and two cold air 100% are opened, press 10-15min cool time to control, then carry out cutting segmentation and pull out or hang out casting machine runner.
Below, with reference to example particularly, the stagnant base processing method of sheet billet continuous casting according to the present invention is described.
Example 1: by checking the origin cause of formation of stagnant base; determine because accumulated slag between fan-shaped section roll causes stagnant base; in incident processing procedure; for this situation; first shut down, secondary cooling water presses 0.5m/min water distribution, presses 10-15min cool time and controls; then turn accident throwing mode to promote throwing after screwdown driving roller and, maybe by throwing after lifting pressure sector-segment frames, avoid throwing by force to cause equipment damage.Accident treatment time controling is within 150min, fan-shaped section does not sustain damage, and causality loss drops to minimum.
Example 2: through confirming because Liquid level fault causes the crystallizer steel that overflows to cause stagnant base, in incident processing procedure, secondary cooling water and two cold air 100% are opened, press 10-15min cool time to control, next, promote 1# segment frames, guaranteeing to split strand between 0# section and 1# section with flame accident rifle under the prerequisite not damaging 1# section roller, after strand cuts off, 0# section and above strand crane hang out, and 1# section and later strand adopt startup withdrawal straightening machine to pull out.Accident treatment time controling is within 120min, fan-shaped section does not sustain damage, and causality loss drops to minimum.
Example 3: because the change of fan-shaped section opening degree causes the serious bulge of strand to cause stagnant base; in incident processing procedure; first shut down, secondary cooling water presses 0.5m/min water distribution, presses 10-15min cool time and controls; then accident throwing mode throwing is turned; in process of billet withdrawal, promote sector-segment frames at bulge point and dodge, until during stagnant base pull-out more than fan-shaped section 1m; entangle stagnant base with steel cable, then hang out stagnant base with crane lifting.Accident treatment time controling is within 120min, fan-shaped section does not sustain damage, and causality loss drops to minimum.
In the stagnant base incident processing procedure of example 4:1# machine bleed-out, through checking, need to cut stagnant base, secondary cooling water and two cold air 100% are opened, and press 10-15min cool time and control, promote 1# segment frames subsequently, guaranteeing to split strand between 0# section and 1# section with flame accident rifle under the prerequisite not damaging 1# section roller, after strand cuts off, 0# section and above strand crane hang out, and 1# section and later strand adopt startup withdrawal straightening machine to pull out.But check that discovery 1# section and later strand draw motionless, hard stop, first promote screwdown driving roller, again start withdrawal straightening machine, still draw motionless, first promote pressure sector-segment frames, again start withdrawal straightening machine.Rear casting speed is pulled to control by 1.7m/min-2.0m/min, fast strand is pulled out fan-shaped section.But, in this example, stagnant base formed rear because of equipment long for recovery time, strand is serious excessively cold, causes strand to pull out fan-shaped section, is separated by strand by strand from between 7# section and 8# section.The stagnant base withdrawal straightening machine of horizontal segment pulls out subsequently, and the stagnant base crane of segmental arc hangs out.Accident treatment time controling is within 200min, fan-shaped section does not sustain damage, and causality loss drops to minimum.
To sum up, according to the stagnant base processing method of the sheet billet continuous casting of illustrative examples of the present invention, accident treatment time controling in 120-200min, and avoids equipment loss, improves caster work rate simultaneously.Be checked through casting machine equipment deficiency in time due to during stagnant base accident treatment, in postorder production process, therefore avoid batch slab quality accident.
Although show embodiments of the invention, without departing from the present invention, various amendment can be carried out to embodiment.Scope of the present invention is by claim and equivalents thereof.
Claims (6)
1. the stagnant base processing method of sheet billet continuous casting, described method comprises:
A stagnant base process that () bleed-out, the steel that overflows are formed, carry out secondary cooling water water distribution to crystallizer and 0# section by certain pulling rate, the controlled cooling model time, fan-shaped section stops joining secondary cooling water and two cold air; Promote sector-segment frames, pulled out by casting base or hang out, wherein, crystallizer and 0# section carry out two cold water distributions by 0.6m/min pulling rate, and the water distribution time presses 10-20min and controls;
B the stagnant base process having foreign matter to be formed between cold or roller is crossed in the distortion of () fan-shaped section, strand, shut down, carry out secondary cooling water water distribution by certain pulling rate, the controlled cooling model time is 10-15min; Promote screwdown driving roller or sector-segment frames, casting base pulled out or hangs out, wherein, carrying out two cold water distributions by 0.5m/min pulling rate;
C stagnant base process that () fan-shaped section casting blank bulging is formed, shut down, carry out secondary cooling water water distribution by certain pulling rate, the controlled cooling model time is 10-15min; Promote sector-segment frames, casting base pulled out or hangs out, wherein, carrying out two cold water distributions by 0.5m/min pulling rate.
2. the stagnant base processing method of sheet billet continuous casting as claimed in claim 1, wherein, if when the strand forming stagnant base needs to split, secondary cooling water and two cold air 100% are opened, presses 10-15min cool time and controls.
3. the processing method of the stagnant base of sheet billet continuous casting as claimed in claim 2, wherein:
For bleed-out, overflow steel form stagnant base, promote sector-segment frames, between 0# section and 1# section, split strand, 0# section and crystallizer band strand hang out, 1# section and 1# section later strand pull-out;
For fan-shaped section distortion, strand crosses the stagnant base having foreign matter to be formed between cold or roller, and after promoting screwdown driving roller, throwing or promote depresses throwing after sector-segment frames;
For the stagnant base that fan-shaped section casting blank bulging is formed, throwing after lifting sector-segment frames.
4. the processing method of the stagnant base of sheet billet continuous casting as claimed in claim 3, wherein, for the stagnant base that bleed-out, the steel that overflows are formed; when strand draws motionless, first shut down, promote screwdown driving roller; or promote pressure sector-segment frames simultaneously, after pulling strand, casting speed controls by 1.7m/min-2.0m/min.
5. the processing method of the stagnant base of sheet billet continuous casting as claimed in claim 3, wherein, is included in segmental arc to the process of the stagnant base that described bleed-out, the steel that overflows cause and strand separates by horizontal segment separation position, by strand pull-out or hang out.
6. the processing method of the stagnant base of sheet billet continuous casting as claimed in claim 3, for the stagnant base that bleed-out, the steel that overflows are formed, comprising, when horizontal segment afterbody is with arc strand, arc strand controls to send strand speed by 0.3m/min-0.5m/min, when more than 1# section 1m sent by strand, hangs out strand.
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| CN107377918A (en) * | 2017-06-29 | 2017-11-24 | 振石集团东方特钢有限公司 | A kind of stainless steel plate billet continuous casting machine Accident Handling Method |
| CN112756576B (en) * | 2020-12-03 | 2022-03-04 | 广西柳钢华创科技研发有限公司 | Treatment method for generating scratches on surface of continuous casting slab to wide-surface foot roll or bent section of crystallizer |
| CN114632919B (en) * | 2020-12-03 | 2023-06-16 | 广西柳州钢铁集团有限公司 | Method for treating scratches on surface of continuous casting slab |
| CN112756575B (en) * | 2020-12-03 | 2022-02-18 | 广西柳钢华创科技研发有限公司 | Processing method for generating scratches on surface of continuous casting slab in horizontal section |
| CN112692247B (en) * | 2020-12-03 | 2022-03-11 | 广西柳钢华创科技研发有限公司 | Treatment method for generating scratches on surface of continuous casting slab in arc-shaped section |
| CN113084107B (en) * | 2021-03-23 | 2022-07-29 | 广东韶钢松山股份有限公司 | Method for rapidly processing retained blank of slab caster |
| CN113600775A (en) * | 2021-08-26 | 2021-11-05 | 新疆八一钢铁股份有限公司 | Slab continuous casting machine slab stagnation rapid treatment method |
| CN113878102A (en) * | 2021-09-07 | 2022-01-04 | 邯郸钢铁集团有限责任公司 | Control method for solving blank stagnation problem of Danieli slab caster |
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| CN1253864A (en) * | 1999-11-25 | 2000-05-24 | 上海宝钢集团公司 | Separable fan section of conticaster |
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