CN101169624A - Plate blank continuous casting off-line emulation system under secondary cooling and dynamic soft reduction - Google Patents
Plate blank continuous casting off-line emulation system under secondary cooling and dynamic soft reduction Download PDFInfo
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Abstract
The invention provides an off-line simulation system for a secondary cooling of a slab continuous casting under a dynamic slight press, and mainly solves the technical problem that the adjustment of parameters under a dynamic slight press in an actual production costs too much. The computer in the simulation system consists of a simulator inner core unit, which is used for realizing an analog simulation of the main casting condition parameters; a processing model parameter setting unit which is used for setting the processing controls parameters in the model; a model calculating inner core unit, which is used for calculating the processing model combined with the simulated casting condition parameters; a monitoring and displaying unit, which is mainly used for accomplishing an UI display for the simulation result. The simulator inner core unit and the model calculating inner core unit realize an interaction of process parameter data through a shared memory. The model calculating inner core unit and the monitoring and displaying unit conduct an interaction of simulation result data through an Ethernet LAN. The model calculating inner core unit and the processing model parameter setting unit realize an interaction of processing model parameters through a database of model parameters. The invention is mainly applicable to an analog simulation of the specific control process of the water distribution for a secondary cooling of a slab continuous casting under a dynamic slight press.
Description
Technical field:
The invention belongs to the production simulation technical field of metallurgical continuous casting, continuous casting two cold particularly is provided and has dynamically gently depressed off-line emulation system, be used for cooling water distribution of sheet billet continuous casting production secondary and the dynamic analog simulation of gently depressing concrete control procedure.
Background technology:
Development along with industrial technology, people are more and more higher to the quality requirements of steel products, all require to have high strength, high tenacity, superior weldability energy and well resist hydrogen induced cracking with steel etc. as the steel for pipe of transport gas, sea boring, platform structure.Defectives such as normal strand center segregation that occurs and center porosity will have a strong impact on strand internal soundness problem in the casting process, are that restriction steel products quality and output obtain the further bottleneck problem that improves always.Adopted both at home and abroad for this reason that solidification end is dynamically gently depressed, under the solidification end weight, technology such as forging and pressing continuously, electromagnetic agitation, solidification end Qiang Leng improve the quality of products, reduce the harm of center segregation and center porosity to the strand internal soundness, wherein dynamically gently depress technology and can more efficiently eliminate center segregation and center porosity, this technology produces the solidification shrinkage amount that certain drafts compensates strand by exerting pressure near the liquid core of continuous casting billet end, reach to eliminate center segregation and loose purpose.
The technology of dynamically gently depressing can the successfully online important prerequisite that is applied in the continuous casting production process be to set up rationally reliable real time temperature computation model (heat-tracking model), dynamic secondary cooling water allocation model and dynamically depress model, and in conjunction with the actual production process of continuous casting, constantly debug and process optimization, finally determine rationally process modeling parameter accurately.This work is based upon on the basis of actual production process, onlinely debug and optimize the normal operation that will influence produced on-site, expend a large amount of resources, fund and cost simultaneously, the effective way that addresses this problem is to set up off-line emulation system by analog simulation, visual rationingization ground reproduces the continuous casting actual production process, essential condition in the process is analyzed, reduced the risk of on-line debugging, save cost and resource consumption simultaneously greatly.
At present, a domestic patent part of having applied for is primarily aimed at and realizes dynamically gently depressing the fan-shaped section equipment of control, as patent CN00254878.X, CN200510098812.5, CN03108436.2, CN03819174.1, CN200510042964.3, a part is primarily aimed at the technological parameter about gently depressing, as CN02289305.9, CN01122537.8, the emulation aspect then is primarily aimed at the overall craft flow process of whole continuous casting production process, as CN200410009213.7; The related article of publishing rests on the static Simulation of temperature field calculating and secondary cooling water distribution process thereof mostly except foregoing.
Summary of the invention:
The object of the invention is to provide a kind of sheet billet continuous casting secondary cooling and dynamically gently depresses off-line emulation system, continuous casting is dynamically gently depressed and the concrete control procedure of a whole set of technology is carried out analogue simulation, for researchist and production technology personnel provide simulation tool and basic platform, thereby lay a good foundation for the online application of dynamically gently depressing technology.The related personnel is by input different casting condition, streamline state, parameter index, can simulate secondary cooling and the control procedure of gently depressing in the slab casting process quickly and easily, and select suitable controlled variable and parameters of technique process according to simulation result, for the parameter setting in the production run and optimization provide good foundation.
Technical scheme of the present invention is: the cooling of sheet billet continuous casting secondary reaches dynamically gently depresses off-line emulation system, comprise computing machine, described computing machine contains simulator kernel unit, Model Calculation kernel unit, monitoring display unit and process modeling parameter setting unit, wherein the simulator kernel unit realizes the analog simulation of main pouring condition procedure parameter in conjunction with the continuous casting actual production process; Process modeling parameter setting unit is used for the technology and the controlled variable of model are set; The Model Calculation kernel unit is carried out process modeling in conjunction with simulation pouring condition parameter and is calculated; The interface display to simulation result is mainly finished in the monitoring display unit.Simulator kernel unit and Model Calculation kernel unit are mutual by Sharing Memory Realization procedure parameter data, Model Calculation kernel unit and monitoring display unit are by Ethernet LAN interactive simulation result data, and the mutual of process modeling parameter realized by the model parameter database in Model Calculation kernel unit and process modeling parameter setting unit.
The simulator kernel unit is a key of the present invention, this part is simulated the variation of pouring condition parameter in production runes different in the sheet billet continuous casting and the process in conjunction with site environment, can simulate the variation of pouring condition parameter in sheet billet continuous casting production stable state and the unstable state casting process, make things convenient for the operation of off-line simulation when truly reducing in-situ production environment.The simulator kernel unit is made up of data initialization module, casting machine state simulation module, pouring condition analog module and procedure parameter data release module.Wherein the data initialization module is used for pouring condition parameters such as initialization steel grade, pouring temperature, crystallizer thickness and crystallizer width before starting analogue system.Different casting machine state in the casting machine state simulation module simulation continuous casting production process, thus can control the different production runes of continuous casting, make model finish the transient transition platform that provides the foundation stably for further optimizing technological parameter.Casting machine state simulation module comprises maintenance, insert dummy bar, prepare cast, open water, normally cast, fast sprue-replacing, change ladle, change tundish and watering eventually fast.This module is in strict accordance with the produced on-site working specification simultaneously, specifically split water, fast sprue-replacing, change ladle, the variation changing tundish and water main pouring condition parameter in these transients eventually fast simulates.As the variation of opening pulling rate parameter in the process of watering, the simulation that the present invention changes this parameter in opening the process of watering is carried out in strict accordance with pulling rate lifting setting curve in the working specification, has reduced in-situ production environment truly as far as possible.The pouring condition analog module has been simulated the variation of main pouring condition parameter in the continuous casting normal productive process, as lifting pulling rate, middle bag temperature variation, crystallizer on-line width modulation etc.Adopt the lifting of two kinds of patterns realizations of continous way and batch (-type) to pulling rate, when satisfying the off-line simulation needs, the real simulation and the lifting process of pulling rate under the field condition that reduced.Wherein the continuous lifting pattern designs parameters Optimization for making things convenient in the stable state casting process, when needing to change pulling rate, only need the input desired value, pulling rate just changes to desired value with bigger acceleration, thereby can in the relatively short time, finish the variation of transient, system is tended towards stability fast, shortened the time of in the off-line simulation process process modeling parameter being adjusted and being optimized; Batch-type hoisting is that the actual lifting process for pulling rate in the simulated field production run designs.By manually-operated, trend is stepped in strict accordance with working specification in the lifting of on-the-spot pulling rate, and promptly pulling rate is changed in the target pulling rate process, need stablize a period of time at some transition pulling rates of centre, finally is changed to desired value.The mensuration of wrapping temperature based on centering in the production run adopts discontinuous formula thermometric, and the mode of sudden change is adopted in the simulation of this module centering bag temperature variation, and instantaneous variation is to desired value when wrapping temperature in promptly changing.With middle bag temperature classes seemingly, crystallizer width, steel grade, process for cooling, the isoparametric variation of roll gap technology with the mode instantaneous variation of sudden change to desired value.Procedure parameter data release module writes shared drive with information such as the streamline state of simulation, main pouring condition parameters, uses for the Model Calculation kernel unit.Above-mentioned simulation to casting machine state, main pouring condition procedure parameter in the continuous casting production process is applicable to various dissimilar casting machines, has realized versatility of the present invention.
The Model Calculation kernel unit is integrated dynamically gently depresses in the technology process modeling of core the most, also is core of the present invention.This part comprise the procedure parameter data reception module, dynamically junior unit tracking module, real-time temperature field model module, dynamically secondary cooling water allocation model module, dynamically gently depress model module, system journal module, time management module and simulation result data release module.Wherein the procedure parameter data reception module is by reading the up-to-date information that shared drive obtains significant process parameter in the production run.Continuous casting is dynamically gently depressed in the technology, and the most several process modeling algorithms of core are based upon on the basis of dynamic tracking junior unit thought, dynamically the junior unit tracking module is then handled steel grade to junior unit, position, base age, average pull rate, the degree of superheat, followed the tracks of by the water yield by discretize under the guidance of this thought, for further Model Calculation is laid a good foundation.Rationally accurate real-time temperature field computation model is to formulate the important prerequisite of gently depressing technological parameter, provide the surface temperature feedback signal for dynamic secondary cooling water distribution simultaneously, make the secondary cooling water cooling effect more near the casting billet surface target temperature, the real-time temperature field model module is in conjunction with the information of all junior units on actual production process and the streamline, through mathematical simulation calculation, provide Temperature Distribution, base hull shape shape, two-phase region position meter and the solidification end position of casting blank section, for dynamic secondary cooling water distribution with dynamically gently depress model and lay a good foundation.Dynamic secondary cools off the water allocation model module and dynamically gently depresses model module on the basis of real-time temperature field computation model, in conjunction with actual production process, provides the water yield setting of each secondary cooling zone on the streamline and the intermesh determination of each fan-shaped section respectively through calculating.The system journal module records main incident and the process data information in the simulation process so that further analyze and study.The time management module realizes advancing in time operation, maintenance system clock and the continuous casting production time scene of analogue system.Simulation result data release module is externally issued simulation result information by LAN (Local Area Network) with the form of multicast.
The monitoring display unit provides visualization interface of the present invention, receives the related data information of transmitting by LAN (Local Area Network) by the simulation result data reception module, and upgrades the interface by the simulation result data disaply moudle, shows the correlated process data in real time.This part is separated fully with other parts, and modularization is convenient to the upgrading and the maintenance of this off-line emulation system fully.
Process modeling parameter setting unit comprises models for temperature field parameter module, process for cooling parameter module and roll gap technological parameter module.Can be respectively adjust process modeling parameter in the real-time temperature field computation model, the model parameter relevant and gently depress the model parameters that the roll gap CONTROL PROCESS is correlated with different with various secondaries cooling water distribution technologies by above-mentioned module, and by constantly debugging and analysis, further optimize the related process model, for the online application of dynamically gently depressing technology lays a good foundation.
The invention has the advantages that:
1. as mentioned above, the simulator kernel unit is in conjunction with the simulation of continuous casting actual production process to casting machine state and main pouring condition, be applicable to dissimilar conticasters, thereby realized the versatility of off-line emulation system among the present invention, can the extensive sheet billet continuous casting production run of analogue simulation in secondary cooling and the concrete control procedure dynamically gently depressed.
2. the present invention not only can carry out emulation to the specific implementation process of dynamically gently depressing in the continuous casting production stable state casting process, simultaneously also the unstable state casting process emulation and research have been carried out, for accuracy and the smooth transition that further improves Model Calculation in the continuous casting unstable state casting process provides basic platform.
Among the present invention the implementation procedure strictness of simulator kernel unit according to continuous casting production scene working specification, whole simulation process is based on on-the-spot actual production process, guaranteed that the present invention reduces site environment truly, the online application of dynamically gently depressing technology has been had directive significance.
4. can control the continuous casting production process of emulation by casting machine state simulation module, make the present invention can show the specific implementation process of dynamically gently depressing in the different production runes of continuous casting, thereby the online application of dynamically gently depressing technology for continuous casting is had laid a good foundation.
5. process modeling parameter setting unit provides and has revised the interface that continuous casting is dynamically gently depressed technology related process parameter, when making the present invention can optimize existing steel grade dynamically gently to depress related process, be with good expansibility, provide simulation tool for developing new steel grade and gently depressing related process.
Description of drawings:
Fig. 1 is off-line emulation system structural drawing among the present invention.
Fig. 2 is simulator kernel flow process control block diagram of the present invention
Fig. 3 waters process pulling rate lifting setting curve for opening among the present invention.
Fig. 4 is pulling rate lifting control model among the present invention.
Embodiment:
With reference to Fig. 1, before user secondary cooling and concrete control procedure of dynamically gently depressing in beginning sheet billet continuous casting production are carried out emulation, according to the result who analyzes and study, determine reasonable process parameter, process for cooling parameter module 20 definite rationally supporting secondary cooling water distribution technologies of real-time temperature field computation process respectively by the models for temperature field parameter module in the process modeling parameter setting unit 4 19, roll gap technological parameter module 21 determines dynamically gently to depress reasonable supporting roll gap CONTROL PROCESS in the implementation process.
After technological parameter reasonably set, with reference to Fig. 2, the user according to actual needs, by data initialization module 5 input initialization data, and switch the different production runes of casting machine State Control continuous castings by casting machine state simulation module 6, after the casting condition is ready to, pulling rate control criterion according to corresponding unstable state casting process in the execute-in-place rules is controlled raising speed automatically, split and water, fast sprue-replacing, change ladle, changing tundish fast controls with watering eventually, through judging, then enter casting condition determination step when unstable state pulling rate lifting process finishes,, then change pouring condition by pouring condition analog module 7 if change, if it is constant, then pulling rate is constant, changes cast length, then changes tail base length when drawing tail base state; Through judging, when unstable state pulling rate lifting process does not finish, then upgrade pulling rate and cast length, when drawing tail base state, then change tail base length; And by procedure parameter data release module 8 issuing process supplemental characteristics.
In simulator kernel unit 1 continuous issuing process supplemental characteristic, Model Calculation kernel unit 2 is carried out process modeling with the cycle of setting and is calculated.Dynamically junior unit tracking module 10 carries out dynamic tracking according to the procedure parameter data that procedure parameter data reception module 9 receives to junior unit.Real-time temperature field model module 11, dynamic secondary cooling water allocation model module 12 and dynamically gently depress in model module 13 cohesive process supplemental characteristics, the production run junior unit information and process modeling parameter separately on the streamline are carried out Model Calculation in real time.After one-period simulation calculation process finishes, by the main incident that takes place in the system journal module 14 output one-periods and detailed simulation result data, time management module 15 realizes advancing in time operation, maintenance system clock and the continuous casting production time scene of analogue system.Simulation result data release module 16 is externally issued emulation by LAN (Local Area Network) with the form of multicast and is crossed object information.
Monitoring display unit 3 separates fully with other parts, with the cycle independent operating of setting, constantly read the simulation result data message that transmits by LAN (Local Area Network) by simulation result data reception module 17, and, show the simulation result data in real time by simulation result data disaply moudle 18 renewal visualization interfaces.
Each module among the embodiment, according in the technical scheme for the narration of functions of modules, all be can be easy to obtain, just do not give unnecessary details at this.
Claims (7)
1. a sheet billet continuous casting secondary cooling reaches and dynamically gently depresses off-line emulation system, comprises computing machine, it is characterized in that including in the computing machine:
The simulator kernel unit realizes the analog simulation of main pouring condition procedure parameter;
Process modeling parameter setting unit is used for the technology and the controlled variable of model are set;
The Model Calculation kernel unit is carried out process modeling in conjunction with simulation pouring condition parameter and is calculated;
The interface display to simulation result is mainly finished in the monitoring display unit;
Simulator kernel unit and Model Calculation kernel unit are mutual by Sharing Memory Realization procedure parameter data, Model Calculation kernel unit and monitoring display unit are by Ethernet LAN interactive simulation result data, and the mutual of process modeling parameter realized by the model parameter database in Model Calculation kernel unit and process modeling parameter setting unit.
2. sheet billet continuous casting secondary cooling according to claim 1 reaches dynamically gently depresses off-line emulation system, it is characterized in that, the simulator kernel unit is made up of data initialization module, casting machine state simulation module, pouring condition analog module and procedure parameter data release module, and wherein the data initialization module is used for pouring condition parameters such as initialization steel grade, pouring temperature, crystallizer thickness and crystallizer width before starting analogue system; Different casting machine state in the casting machine state simulation module simulation continuous casting production process, different production runes to continuous casting are controlled, casting machine state simulation module comprises maintenance, insert dummy bar, prepare cast, open water, normally cast, fast sprue-replacing, change ladle, change tundish and watering eventually fast, specifically split water, fast sprue-replacing, change ladle, the variation changing tundish and water main pouring condition parameter in these transients eventually fast simulates; The pouring condition analog module has been simulated the variation of main pouring condition lifting pulling rate, middle bag temperature variation, crystallizer on-line width modulation, steel grade, process for cooling, roll gap technological parameter in the continuous casting normal productive process; Procedure parameter data release module writes shared drive with the streamline state of simulation, main pouring condition parameter information, uses for the Model Calculation kernel unit.
3. sheet billet continuous casting secondary cooling according to claim 2 reaches dynamically gently depresses off-line emulation system, it is characterized in that, the simulation of lifting pulling rate comprises continous way and two kinds of patterns of batch (-type), when wherein the continuous lifting pattern need change pulling rate, only need the input desired value, pulling rate just changes to desired value with bigger acceleration, batch-type hoisting trend is stepped, be that pulling rate is changed in the target pulling rate process, need stablize a period of time at some transition pulling rates of centre, finally be changed to desired value.
4. sheet billet continuous casting secondary cooling according to claim 2 reaches dynamically gently depresses off-line emulation system, it is characterized in that, the parameter change modeling of centering bag temperature, crystallizer width, steel grade, process for cooling, roll gap technology adopts the mode of sudden change, and instantaneous variation is to desired value.
5. sheet billet continuous casting secondary cooling according to claim 1 reaches dynamically gently depresses off-line emulation system, it is characterized in that, the Model Calculation kernel unit comprise the procedure parameter data reception module, dynamically junior unit tracking module, real-time temperature field model module, dynamically secondary cooling water allocation model module, dynamically gently depress model module, system journal module, time management module and simulation result data release module; Wherein the procedure parameter data reception module is by reading the up-to-date information that shared drive obtains significant process parameter in the production run; Dynamically the junior unit tracking module is handled steel grade to junior unit, position, base age, average pull rate, the degree of superheat, followed the tracks of by the water yield by discretize, for further Model Calculation is laid a good foundation; The real-time temperature field computation model is to formulate the important prerequisite of gently depressing technological parameter, provide the surface temperature feedback signal for dynamic secondary cooling water distribution simultaneously, make the secondary cooling water cooling effect more near the casting billet surface target temperature, the real-time temperature field model module is in conjunction with the information of all junior units on actual production process and the streamline, through mathematical simulation calculation, provide Temperature Distribution, base hull shape shape, two-phase region position meter and the solidification end position of casting blank section, for dynamic secondary cooling water distribution with dynamically gently depress model and lay a good foundation; Dynamically secondary cooling water allocation model module and the dynamic model module of gently depressing provide the water yield setting of each secondary cooling zone on the streamline and the intermesh determination of each fan-shaped section respectively in conjunction with the manufacturing parameter data on the basis of real-time temperature field computation model; The system journal module records main incident and the process data information in the simulation process; The time management module realizes advancing in time the operation of analogue system, maintenance system clock and continuous casting production time scene; Simulation result data release module is externally issued simulation result information by LAN (Local Area Network) with the form of multicast.
6. sheet billet continuous casting secondary cooling according to claim 1 reaches dynamically gently depresses off-line emulation system, it is characterized in that, the monitoring display unit provides visualization interface, receive the related data information of transmitting by LAN (Local Area Network) by the simulation result data reception module, and, show the correlated process data in real time by simulation result data disaply moudle renewal interface.
7. sheet billet continuous casting secondary cooling according to claim 1 reaches dynamically gently depresses off-line emulation system, it is characterized in that, process modeling parameter setting unit comprises models for temperature field parameter module, process for cooling parameter module and roll gap technological parameter module, adjust process modeling parameter in the real-time temperature field computation model, the model parameter relevant and gently depress the relevant model parameter of roll gap CONTROL PROCESS by above-mentioned module respectively with different with various secondaries cooling water distribution technologies, and continuous debugging optimization related process model.
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| CN101912952A (en) * | 2010-08-27 | 2010-12-15 | 田陆 | Control method under dynamic soft reduction and determining method of solidified tail end and reduction interval |
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| CN102508943A (en) * | 2011-09-28 | 2012-06-20 | 中冶南方工程技术有限公司 | Slab continuous casting secondary cooling off-line simulation system and method |
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| CN101695747B (en) * | 2009-11-03 | 2011-06-08 | 攀钢集团研究院有限公司 | Method for controlling bloom continuous casting dynamic soft-reduction pressure interval |
| CN101912952A (en) * | 2010-08-27 | 2010-12-15 | 田陆 | Control method under dynamic soft reduction and determining method of solidified tail end and reduction interval |
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