CN103567409B - Method for on-line width adjusting of continuous casting - Google Patents
Method for on-line width adjusting of continuous casting Download PDFInfo
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- CN103567409B CN103567409B CN201210273642.XA CN201210273642A CN103567409B CN 103567409 B CN103567409 B CN 103567409B CN 201210273642 A CN201210273642 A CN 201210273642A CN 103567409 B CN103567409 B CN 103567409B
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Abstract
The invention relates to a method for on-line width adjusting of continuous casting. The method comprises the following steps of I, setting the width-adjusted target size of a lower port of a crystallizer; II, checking the required conditions for width adjusting, namely a, good surface condition of a copper plate of the crystallizer; b, stable liquid level of the crystallizer in the casting process; c, a locking device of the crystallizer being in the working state; III, starting the width adjusting process, enabling an upper hydraulic cylinder and a lower hydraulic cylinder at each of the right side and the left side of the crystallizer to run from low speed to high speed and then from high speed to low speed according to the set width value after width adjusting; after the low port reaches the target value, completing the width adjusting procedure; after adjusting, enabling the sizes of the upper port and lower port of the crystallizer to respectively reach the target width; IV, checking the liquid level of the crystallizer, wherein when the speed is raised and the size reaches the target width of the steel plate after the liquid level is stabilized, the casting speed of the continuous casting billet is 1.00m/min to 1.30m/min. The method for the on-line width adjusting of continuous casting has the advantages that the continuous casting production of stainless steel after the width adjusting of different cross sections is realized, the number of casting stopping times is reduced, and the production efficiency is improved.
Description
Technical field
The present invention relates to a kind of method of continuous pouring on-line width adjustment.
Background technology
Online heat adjusts the wide different section specification that realizes with steel grade continuous pouring, and this technology has been widely used in carbon steel continuous casting and has produced, but stainless steel hot adjusts wide technique to there is no precedent at home.Stainless steel production specification changes the frequency to be increased, if change section reorganization production by stopping to water in the past, the consequences such as production efficiency reduction and production cost increase must be caused, adjust wide production in view of realizing the online heat of carbon steel production line, but the method for existing continuous pouring on-line width adjustment can not be used for stainless steel production.
Summary of the invention
In order to overcome the deficiency of the method for existing continuous pouring on-line width adjustment, the invention provides a kind of method of the on-line width adjustment for stainless steel continuous pouring, this method realizes stainless steel different section and adjusts wide rear company to water production, reduces and stops watering number of times, enhance productivity and iron and steel stock recovery rate.
The method of this continuous pouring on-line width adjustment comprises following step successively:
ithe target size of wide post crystallization device end opening is adjusted in setting, the target size that setting adjusts wide post crystallization device suitable for reading; Adjustment poring rate, to 0.5m/min-1.70m/min, adjusts wide rear plan width in the wide picture input of tune.
iIcheck and adjust wide required condition:
A copper plate of crystallizer surface is good, width face gap≤0.5mm; Width adjusting mechanism is flexible;
B casting process mold liquid level is steady, and covering slag is without knot bar phenomenon;
C crystallizer locking device is in running order;
iIIstart and adjust wide program, every side, the left and right sides of crystallizer has upper and lower two hydraulic cylinders to carry out in the following manner according to the wide rear setting width value of tune:
First step conical degree of crystallizer becomes at a slow speed large, is namely increased by 0mm/min ~ 6mm/min, and crystallizer size suitable for reading increases to 81 ~ 83% of target width by the width before adjusting, and bottom size remains unchanged;
The continuation adjustment suitable for reading of second step crystallizer, regulate the speed by accelerating slowly, namely accelerated by 6mm/min ~ 75mm/min, to target width 89 ~ 91% time regulate the speed and reach maximum, be 75 mm/min, then adjust wide speed to diminish gradually, until crystallizer is suitable for reading be adjusted to target width, adjusting to minimum is 6mm/min ~ 0mm/min, and stopping suitable for reading being adjusted wide; With adjustment suitable for reading in this process, crystallizer end opening synchronously starts adjustment, regulates the speed also by accelerating slowly, namely by 0mm/min ~ 75mm/min by accelerating slowly, end opening reaches 89 of target
~regulate the speed when 91% and reach maximum, reach 75mm/min, then reduce at a slow speed, during to 75mm/min ~ 6mm/min, suitable for reading when reaching desired value crystallizer end opening be not yet adjusted to desired value;
3rd step crystallizer size suitable for reading remains unchanged, and crystallizer end opening is adjusted to target width at a slow speed, and when end opening reaches desired value, (when tapering is decreased to former tapering), adjusts wider than journey complete.
After adjustment, crystallizer upper and lower opening size reaches target width respectively;
iVcheck mold liquid level, when after stable, speed-raising is to the target width of steel plate, the poring rate 1.00m/min ~ 1.30m/min of continuous casting billet.
The method of above-mentioned continuous pouring on-line width adjustment, is characterized in that:
A with the wide speed of the tune calculated to narrow side up and down all hydraulic cylinder carry out driving to regulate leptoprosopy, corresponding speed is determined according to adjustable range, and when leptoprosopy moves, any point on leptoprosopy is no more than 2mm to the ultimate range on casting blank shell surface;
The correction of b tapering meets adjustment parameter request:
When speed refers to and adjusts wide, the 50mm/min that regulates the speed of crystallizer list narrow side transverse direction
Poring rate settings 120cm/min
Adjust wide minimum widith change 10mm
Adjust wide Breadth Maximum change 2000mm
The maximum taper 20mm of crystallizer two side copper plate
Minimum taper-the 20mm of crystallizer two side copper plate
Tapering practical adjustments error is not more than 10%.
The minimum widith of adjustment of the present invention is 1000mm, and Breadth Maximum is 2150mm, and adjusting range is 10mm-2000mm, can adjust to any width value between 2150mm by 1000mm is wide.
Continuous pouring on-line width adjustment is by steel grade properties influence, and stainless steel on-line width adjustment and carbon steel on-line width adjustment difference have following several: one to be adjust wide speed, and stainless steel alloy amount is large, and characteristic is soft, adjusts wide speed to set and is not more than carbon steel system; Two is adjust wide base process, carbon steel adjust wide base can realize iron powder cutting and stainless steel casting blank cutting time iron powder must be had to assist, useless base cutting machine belongs to iron powder cutting machine, therefore for stainless steel continuous pouring on-line width adjustment base, because wedge shape amount is comparatively large, then need to sentence useless process.In view of above-mentioned 2 points, stainless steel continuous pouring on-line width adjustment needs to find the wide speed of a kind of the most reasonably tune, and to reach, final tune is wide cuts the minimum object of useless amount.
After the method enforcement of this continuous pouring on-line width adjustment, realize the online heat of stainless steel and adjust wide technique, decrease the frequency of stopping watering and changing section, during stainless steel is average, continuous cast crystallizer number is increased to 4.18 stoves after enforcement/middle bag by the 3.28 stoves/middle bag before implementing, operating rate and iron and steel stock recovery rate significantly improve: the operating rate before enforcement is 87.70%, and iron and steel stock recovery rate is 98.06%.Operating rate after enforcement is 93.83%, and iron and steel stock recovery rate is 98.24%.
Detailed description of the invention
Below in conjunction with embodiment, the specific embodiment of the present invention is described, but the specific embodiment of the present invention is not limited to following embodiment.
Embodiment
The present embodiment is stainless steel for 304, can realize from 1235mm to 1535mm, adjustment between the different size such as 1535mm to 1840mm, stable wider than parameters viewed from journey from tune, and any warning, shutdown and other serious accidents do not occur.
The present embodiment adjusts wide steel grade to be SUS304, and the specification of the continuous casting billet before on-line width adjustment is 1235mm, and adjusting the specification of wide rear continuous casting billet to be 1535mm, is type of stainless steel shrinkage character according to 304, and its corresponding crystallizer upper and lower opening dimensional values is as follows:
Wide front crystallizer bottom size is adjusted to be 1272mm; Adjust that wide front crystallizer is suitable for reading is of a size of 1288mm;
Wide post crystallization device bottom size is adjusted to be 1576mm; Adjust that wide post crystallization device is suitable for reading is of a size of 1592mm.
The present embodiment is following step successively:
isetting adjusts the target size of wide post crystallization device end opening to be 1576mm; The target size 1592mm that setting adjusts wide post crystallization device suitable for reading; Adjustment poring rate, to 1.20m/min, adjusts wide rear plan width 1535mm in the wide picture of tune (adjust wide picture to be the system that original equipment carries, the tune originally acted on when being mainly used in non-online production is wide) input;
iIcheck and adjust wide required condition:
A copper plate of crystallizer surface is good, width face gap≤0.5mm, and Width adjusting mechanism is flexible;
B casting process mold liquid level is steady, and covering slag is without knot bar phenomenon;
C crystallizer locking device is in running order;
iIIstart and adjust wide program, every side, the left and right sides (width) of crystallizer has upper and lower two (totally four) hydraulic cylinders to carry out in the following manner according to the wide rear setting width value of tune:
First step conical degree of crystallizer at a slow speed 6mm/min becomes large, and crystallizer size suitable for reading (upper ends of two copper coins) increases to 1302 mm by 1288mm, and it is constant that bottom size maintains 1272mm;
The continuation adjustment suitable for reading of second step crystallizer, regulate the speed by accelerating slowly, namely accelerated slowly by 6mm/min, regulate the speed during 1440mm suitable for reading to reach and be 75mm/min to the maximum, then wide speed is adjusted to diminish gradually, until crystallizer is suitable for reading be adjusted to target width 1592mm, adjusting to minimum is 6mm/min, and stopping suitable for reading being adjusted wide; With adjustment suitable for reading in this process, crystallizer end opening synchronously starts adjustment, regulate the speed also by accelerating slowly, namely by 6mm/min by accelerating slowly, regulate the speed during end opening 1424mm and reach maximum, reach 75mm/min, then reduce at a slow speed, to 6mm/min, suitable for reading when reaching desired value crystallizer end opening be not yet adjusted to desired value;
3rd step crystallizer size suitable for reading remains unchanged, and crystallizer end opening is adjusted at a slow speed target width 1576mm, and tapering is decreased to 1.20%, adjusts wider than journey complete.
7.5 minutes whole process used times, after adjustment, crystallizer upper and lower opening size is respectively 1592mm and 1576mm;
iVcheck mold liquid level, when after stable, speed-raising is wide to 1535mm, the poring rate 1.20m/min of continuous casting billet.
The present embodiment meets the requirement of following 2:
A with the wide speed of the tune calculated to narrow side up and down all hydraulic cylinder carry out driving to regulate leptoprosopy, corresponding speed is determined according to adjustable range, and when leptoprosopy moves, any point on leptoprosopy is no more than 2mm to the ultimate range on casting blank shell surface;
The correction of b tapering meets adjustment parameter request.
Illustrate:
Conticaster tapering has two kinds of representations, a kind of to represent for angle, its formula is taper value=(crystallizer size suitable for reading--crystallizer bottom size)/crystallizer bottom size × 100%, another kind of tapering mm represents, its expression formula is taper value=(crystallizer size suitable for reading--crystallizer bottom size)/2 × coefficient, and tapering of the present invention refers to rear one.Coefficient is different according to crystallizer type, if conventional crystallizer, coefficient is 1, if parabola shaped crystallizer, coefficient gives assignment according to parabola type.Represent it is because taper value mm represents in the device parameter that provides of VAI with mm herein.
Claims (2)
1. a method for continuous pouring on-line width adjustment, it comprises following step successively:
ithe target size of wide post crystallization device end opening is adjusted in setting, the target size that setting adjusts wide post crystallization device suitable for reading; Adjustment poring rate, to 0.5m/min-1.70m/min, adjusts wide rear plan width in the wide picture input of tune;
iIcheck and adjust wide required condition
A copper plate of crystallizer surface is good, width face gap≤0.5mm;
B casting process mold liquid level is steady, and covering slag is without knot bar phenomenon;
C crystallizer locking device is in running order;
iIIstart and adjust wide program, every side, the left and right sides of crystallizer has upper and lower two hydraulic cylinders to carry out in the following manner according to the wide rear setting width value of tune:
First step conical degree of crystallizer becomes at a slow speed large, is increased by 0mm/min ~ 6mm/min, and crystallizer size suitable for reading increases to 81 ~ 83% of target width by the width before adjusting, and bottom size remains unchanged;
The continuation adjustment suitable for reading of second step crystallizer, regulate the speed by accelerating slowly, accelerated by 6mm/min ~ 75mm/min, to target width 89 ~ 91% time regulate the speed and reach maximum, for 75mm/min, wide speed is then adjusted to diminish gradually, until crystallizer is suitable for reading be adjusted to target width, adjusting to minimum is 6mm/min ~ 0mm/min, and stopping suitable for reading being adjusted wide; With adjustment suitable for reading in this process, crystallizer end opening synchronously starts adjustment, and regulate the speed also by accelerating slowly, by 0mm/min ~ 75mm/min by accelerating slowly, end opening reaches 89 of target
~regulate the speed when 91% and reach maximum, reach 75mm/min, then reduce at a slow speed, during to 75mm/min ~ 6mm/min, suitable for reading when reaching desired value crystallizer end opening be not yet adjusted to desired value;
3rd step crystallizer size suitable for reading remains unchanged, and crystallizer end opening is adjusted to target width at a slow speed, when end opening reaches desired value, adjusts wider than journey complete;
iVcheck mold liquid level, when after stable, speed-raising is to the target width of steel plate, the poring rate 1.00 m/min ~ 1.30m/min of continuous casting billet.
2. the method for continuous pouring on-line width adjustment according to claim 1, is characterized in that:
A with the wide speed of the tune calculated to narrow side up and down all hydraulic cylinder carry out driving to regulate leptoprosopy, corresponding speed is determined according to adjustable range, and when leptoprosopy moves, any point on leptoprosopy is no more than 2mm to the ultimate range on casting blank shell surface;
The correction of b tapering meets adjustment parameter request:
When speed refers to and adjusts wide, the 50mm/min that regulates the speed of crystallizer list narrow side transverse direction
Poring rate settings 120cm/min
Adjust wide minimum widith change 10mm
Adjust wide Breadth Maximum change 2000mm
The maximum taper 20mm of crystallizer two side copper plate
Minimum taper-the 20mm of crystallizer two side copper plate
Tapering practical adjustments error is not more than 10%.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106270435B (en) * | 2015-05-21 | 2018-04-24 | 上海梅山钢铁股份有限公司 | Reduce the wide method with cutting optimization of tune that the wide base of sheet billet continuous casting tune cuts damage |
| CN106269899B (en) * | 2015-05-26 | 2019-01-08 | 上海梅山钢铁股份有限公司 | The mixed method for pouring width of plate slab control |
| CN105328156B (en) * | 2015-11-11 | 2018-09-28 | 张家港浦项不锈钢有限公司 | A kind of method of different steel grade quick change in common stainless steel continuous casting |
| CN106363146B (en) * | 2016-09-08 | 2018-06-22 | 中冶连铸技术工程有限责任公司 | A kind of method that online hot high speed adjusts crystallizer width |
| CN106513613B (en) * | 2016-12-27 | 2019-04-16 | 中冶赛迪工程技术股份有限公司 | One kind being based on parabolic path continuous casting crystallizer for plate billet hot width adjusting method online |
| CN112296293B (en) * | 2020-09-11 | 2021-09-07 | 柳州钢铁股份有限公司 | Method for changing section in casting of double-flow slab continuous casting machine |
| CN113020555B (en) * | 2021-02-07 | 2022-09-13 | 首钢集团有限公司 | On-line width adjusting method for plate blank of chamfering crystallizer |
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| CN101334672A (en) * | 2007-06-28 | 2008-12-31 | 上海宝信软件股份有限公司 | Crystallizer on-line width modulation system and its method |
| CN102126003A (en) * | 2010-03-11 | 2011-07-20 | 王建波 | Manual-mechanical width adjustor for narrow side of crystallizer |
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| CN102581237A (en) * | 2012-03-23 | 2012-07-18 | 中冶南方工程技术有限公司 | Method for rapidly adjusting width increase of mold in online stepped manner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009178746A (en) * | 2008-01-31 | 2009-08-13 | Jfe Steel Corp | Method and apparatus for changing continuous casting mold width |
| RU97660U1 (en) * | 2010-04-01 | 2010-09-20 | Открытое акционерное общество "Магнитогорский металлургический комбинат" | CONTINUOUS CASTING MACHINE CRYSTALIZER |
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| CN101334672A (en) * | 2007-06-28 | 2008-12-31 | 上海宝信软件股份有限公司 | Crystallizer on-line width modulation system and its method |
| CN102126003A (en) * | 2010-03-11 | 2011-07-20 | 王建波 | Manual-mechanical width adjustor for narrow side of crystallizer |
| CN102266919A (en) * | 2011-08-03 | 2011-12-07 | 田志恒 | System and method for on-line width thermal adjustment of crystallizer |
| CN102581237A (en) * | 2012-03-23 | 2012-07-18 | 中冶南方工程技术有限公司 | Method for rapidly adjusting width increase of mold in online stepped manner |
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