CN102794425A - Control method of three-dimensional dynamic water distribution - Google Patents
Control method of three-dimensional dynamic water distribution Download PDFInfo
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- CN102794425A CN102794425A CN2012102438967A CN201210243896A CN102794425A CN 102794425 A CN102794425 A CN 102794425A CN 2012102438967 A CN2012102438967 A CN 2012102438967A CN 201210243896 A CN201210243896 A CN 201210243896A CN 102794425 A CN102794425 A CN 102794425A
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Abstract
The invention provides a control method of three-dimensional dynamic water distribution. Real water spot situation formed by a nozzle at the surface of a casting blank is calculated in real time by introducing installing parameters and nozzle characteristics of the nozzle, so that the temperature of the surface of the casting blank is reflected truly; in addition, based on the installation position parameters of the nozzle, the control method of three-dimensional dynamic water distribution can propose a reasonable adjusting scheme when the casting speed of the casting blank fluctuates, or a production process changes or the temperature of the surface of the casting blank becomes uneven, so that the corner temperature of the casting blank can meet the requirements of a reasonable metallurgy process.
Description
Technical field
The invention belongs to metallurgical machinery manufacturing technology field, be specifically related to the control method of a kind of Three-Dimensional Dynamic water distribution in the continuous casting generative process.
Background technology
The caster two cold water distribution mainly is through the heat in the absorption strand, reduces the temperature of strand, realizes solidifying of strand, thereby realizes the production of strand.Two cold water distributions mainly realize reducing the temperature of strand to the water yield of casting billet surface through nozzle ejection.In actual production process, the quality that speed that the strand temperature reduces and uniformity directly influence final strand.Strand in process of production, the strand width is with client's changes in demand, but can not the changing basically of casting machine; Therefore when the strand narrowed width,, directly cause strand angle temperature cold excessively if the casting machine parameter does not change; Produce corner crack, reduce the quality and the qualification rate of strand.
Tackle these problems at present, most of steel mills all adopt empirical method to carry out cut-out governing, and perhaps technological parameter is regulated on production limit in limit, avoids the bight temperature low excessively.Present dynamic water allocation all can't address this problem, and can only solve through simulation under the line and experiment repeatedly, and this process is the man power and material of labor not only, and it is also not fully up to expectations to solve effect.
Because two cold water distributions mainly realize the strand cooling through nozzle; But present dynamic water allocation control method is not considered the actual installation size of nozzle and the water spray characteristic of nozzle; And these parameters of nozzle all directly have influence on the temperature field uniformity of strand; Therefore suppose that nozzle installation parameter and water spray characteristic all are in optimum state; Suppose that nozzle can form uniform water spots by casting billet surface, all can not truly reflect the true condition of production of strand, whether therefore can't provide casting blank surface temperature can cause low consequence.Secondly owing to there are not the various parameters of nozzle, therefore when casting blank surface temperature is inhomogeneous, also can't provide how to adjust the nozzle parameter, make casting blank surface temperature even, reach rational metallurgical technology requirement.
Therefore, how to change, when casting blank surface temperature is inhomogeneous, carry out the control of Three-Dimensional Dynamic water distribution, become an important step of technology to the adjustment of delivery nozzle Rational Parameters in fluctuation of strand pulling rate or production technology.
The bibliographical information of relevant this respect for example application number is the patent of invention of 201010547459.5 billet caster by name two cold water distribution advanced control methods; A kind of billet caster two cold water distribution control methods that comprise casting speed, middle Baogang coolant-temperature gage and two cold water distribution water yield controls are disclosed; Specifically: this parameter of casting speed is handled according to the method for the effective pulling rate of employing in the time interval of process stipulation; And, the fluctuation of pulling rate changes the given water yield when surpassing given range again; Preventing that great fluctuation process from appearring in casting blank surface temperature, a delay is arranged thereby guarantee to make between the variation of variation and pulling rate of the cooling circuit water yield; The bigger situation that fluctuates possibly occur to pouring temperature,, as feed-forward signal the given water yield of two each sections of cold-zone revised with middle Baogang coolant-temperature gage or the degree of superheat, dynamic calculation goes out two cold-zone each section water distribution quantities; Through above-mentioned steps, realize control to billet caster two cold water distributions.The present invention can prevent that great fluctuation process from appearring in casting blank surface temperature, can dynamic calculation go out two cold each section water yields, thereby solve the deficiency of traditional cooling water inflow-pulling rate establishing method.Yet how above-mentioned patent adjusts the nozzle parameter if not relating to, make casting blank surface temperature even, thereby realizes online dynamic water allocation.And this respect technology does not have open source literature to disclose as yet.
Summary of the invention
The objective of the invention is: to the problems referred to above; The present invention proposes a kind of Three-Dimensional Dynamic water distribution control method; Realize when fluctuation of strand pulling rate or production technology variation, when the casting billet surface occurrence temperature is inhomogeneous, will providing rational cut-out governing scheme; Make the bight temperature of strand can reach rational metallurgical technology requirement, thereby realize online dynamic water allocation.
The technical scheme that the present invention adopted is: a kind of control method of Three-Dimensional Dynamic water distribution, the location parameter of nozzle and the water yield parameter of nozzle are introduced in the control method, and it is characterized in that, may further comprise the steps:
At first, according to the water yield parameter of the location parameter and the nozzle of nozzle, the water that calculates nozzle unit's water yield forms water spots shape and jet density distribution situation at casting billet surface;
Secondly, under the constant situation of nozzle location, calculate the actual jet density distribution situation of casting billet surface: computational methods are on unit water yield basis, to multiply by the actual amount of water size, promptly obtain actual jet density situation; When the position of nozzle changed, the water spots shape of the unit's of recomputating water yield and jet density distributed and get final product;
Once more, set up the reduction formula of water density and hot-fluid, calculate the temperature conditions of whole strand Temperature Distribution situation, particularly bight in real time; When casting machine width two side nozzles have the independent regulation function; The control method of Three-Dimensional Dynamic water distribution is through calculating casting blank surface temperature and the metallurgical technology parameter is judged; Provide the position adjustment parameter and the water yield adjustment parameter of two side nozzles, thereby make the casting blank surface temperature uniformity reach the metallurgical technology requirement.
The invention has the beneficial effects as follows: the control method of Three-Dimensional Dynamic water distribution of the present invention can be calculated nozzle in the true water spots situation that casting billet surface forms in real time through introducing the installation parameter and the nozzle characteristic of nozzle, truly reflects casting blank surface temperature; Secondly because the installation site parameter of nozzle is arranged; When strand pulling rate fluctuation or production technology changes or casting billet surface occurrence temperature when inhomogeneous; This Three-Dimensional Dynamic water distribution control method; To provide rational cut-out governing scheme, and make the bight temperature of strand can reach rational metallurgical technology requirement.
Description of drawings
Fig. 1 is the threedimensional model of the slab in the control method of Three-Dimensional Dynamic water distribution of the present invention.
Fig. 2 is normal strand arrangement of nozzles figure when producing.
Fig. 3 is strand width nozzle adjustment layout drawing when changing.
Fig. 4 is a nozzle parameter control flow chart.
The specific embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to following embodiment.Those skilled in the art can do various changes or modification to the present invention, and these equivalent form of values are equally within the listed claims limited range of the application.
In the strand production process of reality, secondary cooling water is most important and topmost cooling way, and secondary cooling water is to spray water to casting billet surface through nozzle, and casting blank surface temperature is reduced uniformly.But the width of strand can change; The variation of strand width must cause the variation of strand cooling procedure; Present dynamic water allocation control method is not considered the influence of arrangement of nozzles to this variation, and the Three-Dimensional Dynamic decreasing water distribution method is introduced the installation site of nozzle and the water spray characteristic of nozzle in the control method, according to the arrangement of nozzles scheme and the nozzle characteristic of reality; Calculate whole strand Temperature Distribution situation in real time; The temperature conditions in bight particularly can guides user changes the arrangement parameter of nozzle and the water yield of strand width two side nozzles is regulated separately, thereby avoided the casting blank surface temperature inhomogeneities.
The installation site parameter and water spray water yield parameter of Three-Dimensional Dynamic water distribution control method through introducing nozzle; The distribution of the water that calculates in real time nozzle ejection jet density in water spots shape that casting billet surface forms and water spots; Set up the reduction formula of water density and hot-fluid, realize the cooling of strand.In the online in real time control procedure; If the position of nozzle does not change; The water spots size that casting billet surface forms and the regularity of distribution of jet density can not change, so the water spots shape and the jet density distribution situation of a unit of account nozzle unit water yield in the method, and the true water spots situation of casting billet surface only need multiply by the actual amount of water size on unit water yield basis; Just can obtain actual jet density situation, simplify computing time and cycle.When the position of nozzle changed, shape and the jet density distribution of recomputating water spots got final product.If wide two side nozzle of casting machine has the independent regulation function; Three-Dimensional Dynamic water distribution control method is through calculating casting blank surface temperature and the metallurgical technology parameter is judged; Provide the position adjustment parameter and the water yield adjustment parameter of two side nozzles, thereby make the casting billet surface uniformity reach the metallurgical technology requirement.
The content of not doing in this specification to describe in detail belongs to this area professional and technical personnel's known prior art.
Claims (1)
1. the control method of a Three-Dimensional Dynamic water distribution is introduced the location parameter of nozzle and the water yield parameter of nozzle in the control method, it is characterized in that, may further comprise the steps:
At first, according to the water yield parameter of the location parameter and the nozzle of nozzle, the water that calculates nozzle unit's water yield forms water spots shape and jet density distribution situation at casting billet surface;
Secondly, under the constant situation of nozzle location, calculate the actual jet density distribution situation of casting billet surface: computational methods are on unit water yield basis, to multiply by the actual amount of water size, promptly obtain actual jet density situation; When the position of nozzle changed, the water spots shape of the unit's of recomputating water yield and jet density distributed and get final product;
Once more, set up the reduction formula of water density and hot-fluid, calculate the temperature conditions of whole strand Temperature Distribution situation, particularly bight in real time; When casting machine width two side nozzles have the independent regulation function; The control method of Three-Dimensional Dynamic water distribution is through calculating casting blank surface temperature and the metallurgical technology parameter is judged; Provide the position adjustment parameter and the water yield adjustment parameter of two side nozzles, thereby make the casting blank surface temperature uniformity reach the metallurgical technology requirement.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735028A (en) * | 2016-12-20 | 2017-05-31 | 中冶连铸技术工程有限责任公司 | Produce the arrangement of nozzles method and system of the conticaster of Hot Metal in Beam Blank |
| CN106825471A (en) * | 2016-12-20 | 2017-06-13 | 中冶连铸技术工程有限责任公司 | The arrangement of nozzles method and system of billet caster and slab caster |
| CN107457378A (en) * | 2017-07-25 | 2017-12-12 | 北京科技大学 | The method that continuous casting steel billet three-dimensional dynamic water distribution water is set and controllable slighter compress is realized |
| CN109967711A (en) * | 2018-08-27 | 2019-07-05 | 中冶赛迪工程技术股份有限公司 | A kind of conticaster secondary cooling zone jet density distribution online test method |
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| JP3622687B2 (en) * | 2001-04-09 | 2005-02-23 | 住友金属工業株式会社 | Steel continuous casting method |
| CN101844215A (en) * | 2009-03-27 | 2010-09-29 | 宝山钢铁股份有限公司 | Dynamic secondary cooling control method for slab continuous casting based on double-cooling mode |
| CN102059333A (en) * | 2010-11-17 | 2011-05-18 | 中冶南方工程技术有限公司 | Advanced secondary cooling water control system of billet continuous casting machine |
| CN102380597A (en) * | 2011-10-28 | 2012-03-21 | 中冶赛迪工程技术股份有限公司 | Method for controlling secondary cooling water spraying width during continuous casting of plate blank |
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| RU2185927C2 (en) * | 1999-10-18 | 2002-07-27 | Открытое акционерное общество "Уральский завод тяжелого машиностроения" | Method for dynamic regulation of ingot cooling process in continuous metal casting apparatus |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735028A (en) * | 2016-12-20 | 2017-05-31 | 中冶连铸技术工程有限责任公司 | Produce the arrangement of nozzles method and system of the conticaster of Hot Metal in Beam Blank |
| CN106825471A (en) * | 2016-12-20 | 2017-06-13 | 中冶连铸技术工程有限责任公司 | The arrangement of nozzles method and system of billet caster and slab caster |
| CN106735028B (en) * | 2016-12-20 | 2019-01-01 | 中冶连铸技术工程有限责任公司 | Produce the arrangement of nozzles method and system of the conticaster of Hot Metal in Beam Blank |
| CN106825471B (en) * | 2016-12-20 | 2019-01-11 | 中冶连铸技术工程有限责任公司 | The arrangement of nozzles method and system of billet caster and slab caster |
| CN107457378A (en) * | 2017-07-25 | 2017-12-12 | 北京科技大学 | The method that continuous casting steel billet three-dimensional dynamic water distribution water is set and controllable slighter compress is realized |
| CN109967711A (en) * | 2018-08-27 | 2019-07-05 | 中冶赛迪工程技术股份有限公司 | A kind of conticaster secondary cooling zone jet density distribution online test method |
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Application publication date: 20121128 |