Bibliographies thématiques / Continuous casting. Steel. Mathematical optimization / Articles de revues
Pour voir les autres types de publications sur ce sujet consultez le lien suivant : Continuous casting. Steel. Mathematical optimization.

Articles de revues sur le sujet « Continuous casting. Steel. Mathematical optimization »

Auteur : Grafiati
Publié le 4 juin 2021
Mis à jour le 10 février 2022

Créez une référence correcte selon les styles APA, MLA, Chicago, Harvard et plusieurs autres

Choisissez une source :

Consultez les 50 meilleurs articles de revues pour votre recherche sur le sujet « Continuous casting. Steel. Mathematical optimization ».

À côté de chaque source dans la liste de références il y a un bouton « Ajouter à la bibliographie ». Cliquez sur ce bouton, et nous générerons automatiquement la référence bibliographique pour la source choisie selon votre style de citation préféré : APA, MLA, Harvard, Vancouver, Chicago, etc.

Vous pouvez aussi télécharger le texte intégral de la publication scolaire au format pdf et consulter son résumé en ligne lorsque ces informations sont inclues dans les métadonnées.

Parcourez les articles de revues sur diverses disciplines et organisez correctement votre bibliographie.

1

Li, Yang, Yan Jin, Hui Yu, Kang Yang, Fan Ai, Jun Wang et Hong Bin Huang. « Numerical Calculation of Fluid Flow in a Continuous Casting Tundish ». Advanced Materials Research 774-776 (septembre 2013) : 316–20. http://dx.doi.org/10.4028/www.scientific.net/amr.774-776.316.

Texte intégral
Résumé :
Placement in the middle retaining wall package, aimed at controlling the flow of liquid steel forms, so that movement of a reasonable level remained stable, while reducing interference from turbulence and dead zones, molten steel in order to extend the average stay of removal in favor of inclusion to improve the cleanliness of molten steel. Keywords:Tundish; Retaining Wall; Flow field; Mathematical Modeling; Inclusion;Optimization setting
Styles APA, Harvard, Vancouver, ISO, etc.
2

Wang, Zhao Feng, Man Yao, Xiao Bing Zhang et Xu Dong Wang. « Optimization Control for Solidification Process of Secondary Cooling in Continuous Casting Steel ». Applied Mechanics and Materials 263-266 (décembre 2012) : 822–27. http://dx.doi.org/10.4028/www.scientific.net/amm.263-266.822.

Texte intégral
Résumé :
In order to predict and control the temperature of continuous casting slab, a mathematical heat transfer model simulating the solidification process of continuous casting slab has been developed based on the realistic roller-layout and spray nozzle distribution. And the accuracy has been verified by comparing with the pin-shooting experiment results. An advanced control strategies are adopted to achieve the optimization of water quantity under different production conditions by the integration of energy saving water distribution module and slab temperature optimization module in the dynamic secondary cooling model. The total water consumption has a trend of dropping off after the utilization of the optimization technique. And the slab surface temperature increases which fits for the down stream direct hot rolling.
Styles APA, Harvard, Vancouver, ISO, etc.
3

Yang, Jie, Dengfu Chen, Fengting Qin, Mujun Long et Huamei Duan. « Melting and Flowing Behavior of Mold Flux in a Continuous Casting Billet Mold for Ultra-High Speed ». Metals 10, no 9 (28 août 2020) : 1165. http://dx.doi.org/10.3390/met10091165.

Texte intégral
Résumé :
High casting speed coincides with the development trend of billet continuous casting, which significantly changes the casting characteristics. A mathematical model of the billet mold, which includes multiphase fluid flow, transient heat transfer, and solidification during ultra-high speed of the casting process was developed. The model is first applied to investigate the flow field of molten steel in the mold, studying the influence of steel flow upon the melting and flowing behavior of mold flux. The temperature and velocity distributions of the flux pool that formed above the molten steel surface are described. A parametric study on the melting temperature and viscosity of mold flux on liquid flux thickness and flow velocity is then carried out. Finally, the model is used to derive the relationship between interfacial tension and level fluctuations. The predictions provide an improved understanding of the melting and flowing behavior of mold flux in the billet mold and give the guidance for the design and optimization of mold flux for ultra-high speed of billet casting.
Styles APA, Harvard, Vancouver, ISO, etc.
4

Yang, Jie, Dengfu Chen, Mujun Long et Huamei Duan. « An Approach for Modelling Slag Infiltration and Heat Transfer in Continuous Casting Mold for High Mn–High Al Steel ». Metals 10, no 1 (26 décembre 2019) : 51. http://dx.doi.org/10.3390/met10010051.

Texte intégral
Résumé :
To clarify the characteristics of slag infiltration and heat transfer behaviors in the meniscus region during the casting of high Mn–high Al steel, a mathematical model of a continuous casting mold that couples fluid flow with heat transfer, and solidification is developed. The model is based on the change in slag composition and properties caused by the steel/slag reaction. The formation and evolution of the meniscus profile and slag films for different mold fluxes during mold oscillation are described. The results show that the rapid growth of the slag rim with a high Al2O3 content approaches and deforms the meniscus so that a series of casting problems such as slag infiltration blocking, large fluctuations in heat flux, and even meniscus breaking occur in the continuous casting process. Predictions are in good agreement with plant measurements. These findings provide an improved understanding of the complex phenomena occurring in the meniscus region and give new insights into the evaluation and optimization of mold flux properties for high Mn–high Al steel casting.
Styles APA, Harvard, Vancouver, ISO, etc.
5

Santos, C. A., J. A. Spim et A. Garcia. « Mathematical modeling and optimization strategies (genetic algorithm and knowledge base) applied to the continuous casting of steel ». Engineering Applications of Artificial Intelligence 16, no 5-6 (août 2003) : 511–27. http://dx.doi.org/10.1016/s0952-1976(03)00072-1.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
6

Wang, Sen, Yarong Shi et Shixin Liu. « Integrated Scheduling for Steelmaking Continuous Casting— Hot Rolling Processes considering Hot Chain Logistics ». Mathematical Problems in Engineering 2020 (4 mai 2020) : 1–10. http://dx.doi.org/10.1155/2020/6902934.

Texte intégral
Résumé :
Steelmaking continuous casting (SCC)—hot rolling (HR) is a key process in the production of steel products. It is also a process with large energy consumption. Energy saving has always been an important goal of production scheduling of this process. In this paper, aiming at integrated scheduling optimization for SCC-HR processes, energy saving objective is converted to minimize waiting time of slabs in slab yard, so as to reduce slab temperature loss and achieve the goal of saving energy. An integrated two-stage mathematical programming model is established for the above problems, and a hybrid algorithm of genetic algorithm and linear programming is designed for the integrated model. The correctness of the model and the validity of the algorithm are verified by computational experiments using simulated instances.
Styles APA, Harvard, Vancouver, ISO, etc.
7

Lin, Peng, Yan Jin, Fu Yang, Ziyu Liu, Rundong Jing, Yang Cao, Yuyang Xiang, Changgui Cheng et Yang Li. « A Simulation and Optimization Study of the Swirling Nozzle for Eccentric Flow Fields of Round Molds ». Metals 10, no 5 (25 mai 2020) : 691. http://dx.doi.org/10.3390/met10050691.

Texte intégral
Résumé :
In continuous casting, the nozzle position may deviate from the center under actual operating conditions, which may cause periodic fluctuation of the steel-slag interface and easily lead to slag entrapment and gas absorption. Swirling nozzles can reduce these negative effects. A mathematical simulation method based on a round mold of steel components with a 600 mm diameter is applied to study the flow field of molten steel in a mold. The swirling nozzle is optimized through the establishment of a fluid dynamics model. Meanwhile, a 1:2 hydraulic model is established for validation experiments. The results show that, when the submerged entry nozzle (SEN) is eccentric in the mold, it results in serious bias flow, increasing the drift index in the mold up to 0.46 at the eccentric distance of 50 mm. The impact depth of liquid steel and turbulent kinetic energy can be decreased by increasing the rotation angle of the nozzle. The nozzle with one bottom hole, which significantly decreases the bottom pressure and turbulent kinetic energy, greatly weakens the scour on nozzle and surface fluctuation. In the eccentric casting condition, using the optimized swirling nozzle that employs a 5-fractional structure, in which the rotation angle of 4 side holes is 30° and there is one bottom outlet, can effectively restrain bias flow and reduce the drift index to 0.28, a decline of more than 39%.
Styles APA, Harvard, Vancouver, ISO, etc.
8

Santos, C. A., N. Cheung, A. Garcia et J. A. Spim. « Application of a Solidification Mathematical Model and a Genetic Algorithm in the Optimization of Strand Thermal Profile Along the Continuous Casting of Steel ». Materials and Manufacturing Processes 20, no 3 (mai 2005) : 421–34. http://dx.doi.org/10.1081/amp-200053451.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
9

LUKIN, SERGEY V., NIKOLAY I. SHESTAKOV, MICHAIL V. PAVLOV, KONSTANTIN YU LEVASHEV et ALEKSEY A. ZBRODOV. « MATHEMATICAL MODELING AND OPTIMIZATION OF HEAT PROCESSING OF SQUARE CROSS SECTION STEEL BAR ON THE TECHNOLOGICAL LINE “CONTINUOUS CASTING MACHINE - TUNNEL THERMOS - HEATING FURNACE” ». Cherepovets State University Bulletin 1, no 100 (2021) : 41–55. http://dx.doi.org/10.23859/1994-0637-2021-1-100-3.

Texte intégral
Résumé :
The PAO Severstal continuous casting machine (CCM) casts square section 100´100 and 150´150 mm billets that after the gas cutting have average temperature 1000-1100 °С. Then billets CCM, transported to the section mill shop, should be placed into a tunnel thermos for preserving their sensible heat and temperature leveling along their section. In this case hot billets are loadedin the heating furnaces, and heating of the billets to required temperature before rolling can be accelerated several times, increasing capacity of the heating furnace and diminishing the specific fuel consumption. The authors present the mathematical model that allows evaluating the heat state of a square section billet on the technological line “CCM - thermos - heating furnace”. The results of numerical simulation of the billet heat state at optimal modes of heat treatment in the thermos and the heating furnace are given.
Styles APA, Harvard, Vancouver, ISO, etc.
10

Maurya, Ambrish, et Pradeep Kumar Jha. « Two-phase analysis of interface level fluctuation in continuous casting mold with electromagnetic stirring ». International Journal of Numerical Methods for Heat & ; Fluid Flow 28, no 9 (3 septembre 2018) : 2036–51. http://dx.doi.org/10.1108/hff-08-2017-0310.

Texte intégral
Résumé :
Purpose This investigation aims to analyze the steel-flux interface level fluctuation because of electromagnetic stirring and its process parameters in a continuous casting billet mold. Design/methodology/approach An un-coupled numerical model for electromagnetic field generation and a coupled numerical model of electromagnetic field and two-phase fluid flow have been developed. The two-phase fluid flow has been modeled using volume of fluid method, in which externally generated time-varying electromagnetic field is coupled and analyzed using magnetohydrodynamic method. Top surface standing wave stability criteria are used to study the criticality of interface stability. Findings Results show that application electromagnetic field for stirring increases the interface level fluctuation, specifically at the mold corners and near the submerged entry nozzle. The increase in current intensity and stirrer width barely affect the interface level. However, interface level fluctuation increases considerably with increase in frequency. Using stability criteria, it is found that at 20 Hz frequency, the ratio of height to wavelength of interface wave increases much above the critical value. The iso-surface of the interface level shows that at 20 Hz frequency, mold flux gets entrapped into the liquid steel. Practical implications The model may be used during optimization of in-mold electromagnetic stirrer to avoid mold flux entrapment and control the cast quality. Originality/value The study of mold level fluctuation in the presence of in-mold electromagnetic stirrer has rarely been reported. The criticality of stirrer process parameters on level fluctuation has not been yet reported. This study lacks in experimental validation; however, the findings will be much useful for the steelmakers to reduce the casting defects.
Styles APA, Harvard, Vancouver, ISO, etc.
11

Wang, Yuan, Xiaochuan Luo, Yang Yu et Haijuan Cui. « Optimal control of two-dimensional parabolic partial differential equations with application to steel billets cooling in continuous casting secondary cooling zone ». Optimal Control Applications and Methods 37, no 6 (4 février 2016) : 1314–28. http://dx.doi.org/10.1002/oca.2236.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
12

Haas, Tim, Christian Schubert, Moritz Eickhoff et Herbert Pfeifer. « Numerical Modeling of the Ladle Flow by a LES-Based Eulerian–Lagrange Approach : A Systematic Survey ». Metallurgical and Materials Transactions B 52, no 2 (16 février 2021) : 903–21. http://dx.doi.org/10.1007/s11663-021-02064-2.

Texte intégral
Résumé :
AbstractTo account for increasing economic and ecological pressure, the steel industry is obligated to continuously optimize all processes. An important optimization approach is numerical modeling although its potential is limited by the accuracy of the mathematical models. In a previous work, a validation database was created and a validation score was derived from this data which allows a comprehensive qualitative accuracy assessment for those models. Here, this system is employed for a systematic optimization of the isothermal flow in the casting ladle. For that, different submodels, namely the turbulence models, subgrid turbulence models, bubble-induced turbulence and interfacial closure models as well as influencing factors, such as the grid resolution or the initial bubble size, are analyzed. It is shown that the large eddy turbulence model is more accurate than the Reynolds-average approach because it is able to reproduce the anisotropy of turbulence in the bubble region. In accordance with the literature, a grid dependency of the lift force is found which can be reduced using an averaged shear field as an additional variable. For the interfacial closure models, the combination of the Tomiyama drag model for fully contaminated systems and the Tomiyama lift correlation showed the best agreement with the experimental data. The results of the survey are summarized to a best-practice guideline with which the validation score can be increased from 38.7 with the Reynolds-average approach to 85.1 on a coarse grid respectively, and 87.8 on a fine grid. However, some upscaling problems of the numerical system from the water model to the real ladle are revealed. There is a need to find accurate yet efficient grid resolutions which make the large eddy turbulence model affordable with the current computational resources. Furthermore, alloying elements or non-metallic inclusions might alter the interfacial forces considerably. However, no studies on their effect have been published yet.
Styles APA, Harvard, Vancouver, ISO, etc.
13

Alvarez de Toledo, G., J. Lainez et J. C. Cirión. « Model optimization of continuous casting steel secondary cooling ». Materials Science and Engineering : A 173, no 1-2 (décembre 1993) : 287–91. http://dx.doi.org/10.1016/0921-5093(93)90230-c.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
14

Yang, Hyunjin, Surya P. Vanka et Brian G. Thomas. « Mathematical Modeling of Multiphase Flow in Steel Continuous Casting ». ISIJ International 59, no 6 (15 juin 2019) : 956–72. http://dx.doi.org/10.2355/isijinternational.isijint-2018-743.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
15

Miettinen, Kaisa. « Using Interactive Multiobjective Optimization in Continuous Casting of Steel ». Materials and Manufacturing Processes 22, no 5 (4 juin 2007) : 585–93. http://dx.doi.org/10.1080/10426910701322468.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
16

Choudhary, S. K., et D. Mazumdar. « Mathematical Modelling of Transport Phenomena in Continuous Casting of Steel. » ISIJ International 34, no 7 (1994) : 584–92. http://dx.doi.org/10.2355/isijinternational.34.584.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
17

Vil’danov, S. K., et G. S. Podgorodetskii. « Mathematical statistics for measurement of steel temperature in steel-pouring ladle and tundish at steel continuous casting ». Izvestiya. Ferrous Metallurgy 64, no 7 (28 août 2021) : 510–18. http://dx.doi.org/10.17073/0368-0797-2021-7-510-518.

Texte intégral
Résumé :
The article considers the temperature distribution in steel during its continuous casting. Temperatures were measured sequentially in the steelpouring ladle (one measurement) and in the tundish (two measurements) using a platinum-platinum-rhodium thermocouple with an accuracy of ±4 °C. We have analyzed the results of 170 casts of two steel grades: 5SP and 35GS. The type of temperatures set distribution was verified on the basis of three goodness-of-fit criteria: Pearson’s χ-square criterion, λ Kolmogorov-Smirnov criterion and W Shapiro-Wilk criterion. The results obtained are consistent with the physical picture of steel casting. The metal in steel-pouring ladle is practically in a stable state and is subject only to natural cooling through the lining, top and ladle body. In the variant of analyzing a sample of temperature values in tundish at the first and second measurements, the hypothesis of normal distribution should be rejected. Here, the steel temperature depends on a number of parameters, including the feed rate and casting rate, feed time and composition of slag-forming and heat-insulating mixtures, etc. Attempts to establish the relationship between the steel temperatures of in steel-pouring ladle and tundish were unsuccessful. Considering the temperature measurement in tundish as two sequential data arrays, the first of which is an argument, and the second is a function, a linear relationship between these arrays was established. This relationship between the first and second temperature measurements in the tundish can be used to estimate the steel final temperature at thermocouple readout, including in the event of a failure. The results of the work can be used in development of a mathematical model of steel casting.
Styles APA, Harvard, Vancouver, ISO, etc.
18

Gao, Xiangzhou, Shufeng Yang, Jingshe Li et Hang Liao. « Numerical Simulation on Optimization of Center Segregation for 50CrMo Structural Alloy Steel ». High Temperature Materials and Processes 35, no 6 (1 juin 2016) : 583–89. http://dx.doi.org/10.1515/htmp-2015-0026.

Texte intégral
Résumé :
AbstractTo improve the center segregation of billet for 50CrMo structural alloy steel, a 3D numerical model of solidification and heat transfer process for continuous casting had been established. The influence law of continuous casting process parameters on the secondary dendrite arm spacing (SDAS) and equiaxed crystal ratio had been obtained. It was shown that reducing superheat and casting speed and increasing the secondary cooling intensity could decrease SDAS. Reducing any one of the three parameters could increase the equiaxed crystal ratio. Adjusting only secondary cooling intensity could not make the SDAS and equiaxed crystal ratio change in the desired direction, but regulating the other two parameters could supply this gap. After optimizing the continuous casting process parameters of 50CrMo billet, the defect of center segregation was solved basically.
Styles APA, Harvard, Vancouver, ISO, etc.
19

Choudhary, S. K., D. Mazumdar et A. Ghosh. « Mathematical Modelling of Heat Transfer Phenomena in Continuous Casting of Steel. » ISIJ International 33, no 7 (1993) : 764–74. http://dx.doi.org/10.2355/isijinternational.33.764.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
20

Pieprzyca, J., T. Merder et M. Saternus. « Optimization of Submerged Entry Nozzle Depth in CC Mould / Optymalizacja Zanurzenia Wylewu W Krystalizatorze Cos ». Archives of Metallurgy and Materials 60, no 4 (1 décembre 2015) : 2927–32. http://dx.doi.org/10.1515/amm-2015-0467.

Texte intégral
Résumé :
The way and speed of steel flux flowing into mould of continuous casting (CC) machine belong to the important parameters characterizing the steel continuous casting process. Such flux causes determined kinds of steel circulation, which together with simultaneous steel crystallization influence the creation of ingots primary structure and quality of its surface. The article presents the results of modelling research which aim was to determine the optimal location of submerged entry nozzle in square moulds (130 x 130 mm and 160 x 160 mm) of CC machine. Such a research was carried out for two different grades of steel (low-carbon steel and high-carbon steel), which feature different parameters of casting.
Styles APA, Harvard, Vancouver, ISO, etc.
21

Ardelean, Marius, Alina Lăscuțoni, Erika Ardelean et Ana Socalici. « Optimization of Synthetic Slag Additions Used in Continuous Casting of Steel ». Solid State Phenomena 254 (août 2016) : 176–81. http://dx.doi.org/10.4028/www.scientific.net/ssp.254.176.

Texte intégral
Résumé :
The appropriate use and in adequate quantities of synthetic slags in continuous casting process (insulating coating powder in tundish and respectively lubricant molding powder in crystallizer) gives a good quality of continuous castings products. The paper presents two methods of determining the necessary of slags: using dispersion analysis software Minitab.v17 and optimization of heat transfer in tundish, depending on powder coating thickness, performed with a program made in Mathcad14 and respectively optimization of the molding powder thickness, using an own simulation program. Both methods are based on the properties of steel grade which is casted (in particular the liquidus temperature of the steel) and they can be adapted to the specifics of the continuous steel casting machines.
Styles APA, Harvard, Vancouver, ISO, etc.
22

Mauder, Tomas, et Josef Stetina. « High Quality Steel Casting by Using Advanced Mathematical Methods ». Metals 8, no 12 (4 décembre 2018) : 1019. http://dx.doi.org/10.3390/met8121019.

Texte intégral
Résumé :
The main concept of this paper is to utilize advanced numerical modelling techniques with self-regulation algorithm in order to reach optimal casting conditions for real-time casting control. Fully 3-D macro-solidification model for the continuous casting (CC) process and an original fuzzy logic regulator are combined. The fuzzy logic (FL) regulator reacts on signals from two data inputs, the temperature field and the historical steel quality database. FL adjust the cooling intensity as a function of casting speed and pouring temperature. This approach was originally designed for the special high-quality high-additive steel grades such as higher strength grades, steel for acidic environments, steel for the offshore technology and so forth. However, mentioned approach can be also used for any arbitrary low-carbon steel grades. The usability and results of this approach are demonstrated for steel grade S355, were the real historical data from quality database contains approximately 2000 heats. The presented original solution together with the large steel quality databases can be used as an independent CC prediction control system.
Styles APA, Harvard, Vancouver, ISO, etc.
23

Pan, Hong, Guo Rong Wu et Zhi Qiang Li. « Quality Control of Casting Slab for 510L Steel ». Applied Mechanics and Materials 117-119 (octobre 2011) : 756–59. http://dx.doi.org/10.4028/www.scientific.net/amm.117-119.756.

Texte intégral
Résumé :
Slab quality affects the quality of hot rolled sheet significantly. There were serious transverse corner cracks on continuous casting slab of 510L steel plate in Panzhihua Steel before. Based on this, some effective countermeasures are put forward, such as the optimization of ratio of heat flux on narrow side and broad side of casting slab and mold powder, as well as the stabilization of casting speed and working condition of caster. With these countermeasures, transverse corner cracks on continuous casting slab have been significantly reduced, and the lines and peeling defects on hot rolled sheet reduce from 30% to 0.
Styles APA, Harvard, Vancouver, ISO, etc.
24

Vynnycky, Michael. « Applied Mathematical Modelling of Continuous Casting Processes : A Review ». Metals 8, no 11 (9 novembre 2018) : 928. http://dx.doi.org/10.3390/met8110928.

Texte intégral
Résumé :
With readily available and ever-increasing computational resources, the modelling of continuous casting processes—mainly for steel, but also for copper and aluminium alloys—has predominantly focused on large-scale numerical simulation. Whilst there is certainly a need for this type of modelling, this paper highlights an alternative approach more grounded in applied mathematics, which lies between overly simplified analytical models and multi-dimensional simulations. In this approach, the governing equations are nondimensionalized and systematically simplified to obtain a formulation which is numerically much cheaper to compute, yet does not sacrifice any of the physics that was present in the original problem; in addition, the results should agree also quantitatively with those of the original model. This approach is well-suited to the modelling of continuous casting processes, which often involve the interaction of complex multiphysics. Recent examples involving mould taper, oscillation-mark formation, solidification shrinkage-induced macrosegregation and electromagnetic stirring are considered, as are the possibilities for the modelling of exudation, columnar-to-equiaxed transition, V-segregation, centreline porosity and mechanical soft reduction.
Styles APA, Harvard, Vancouver, ISO, etc.
25

Xie, Yanmin, Huping Yu, Xueyu Ruan, Baofeng Wang et Yonglin Ma. « RETRACTED : Mathematical modeling of mould temperature field during continuous casting of steel ». Journal of Materials Processing Technology 199, no 1-3 (avril 2008) : 49–55. http://dx.doi.org/10.1016/j.jmatprotec.2007.07.043.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
26

Brezina, Michal, Tomas Mauder, Lubomir Klimes et Josef Stetina. « Comparison of Optimization-Regulation Algorithms for Secondary Cooling in Continuous Steel Casting ». Metals 11, no 2 (1 février 2021) : 237. http://dx.doi.org/10.3390/met11020237.

Texte intégral
Résumé :
The paper presents the comparison of optimization-regulation algorithms applied to the secondary cooling zone in continuous steel casting where the semi-product withdraws most of its thermal energy. In steel production, requirements towards obtaining defect-free semi-products are increasing day-by-day and the products, which would satisfy requirements of the consumers a few decades ago, are now far below the minimum required quality. To fulfill the quality demands towards minimum occurrence of defects in secondary cooling as possible, some regulation in the casting process is needed. The main concept of this paper is to analyze and compare the most known metaheuristic optimization approaches applied to the continuous steel casting process. Heat transfer and solidification phenomena are solved by using a fast 2.5D slice numerical model. The objective function is set to minimize the surface temperature differences in secondary cooling zones between calculated and targeted surface temperatures by suitable water flow rates through cooling nozzles. Obtained optimization results are discussed and the most suitable algorithm for this type of optimization problem is identified. Temperature deviations and cooling water flow rates in the secondary cooling zone, together with convergence rate and operation times needed to reach the stop criterium for each optimization approach, are analyzed and compared to target casting conditions based on a required temperature distribution of the strand. The paper also contains a brief description of applied heuristic algorithms. Some of the algorithms exhibited faster convergence rate than others, but the optimal solution was reached in every optimization run by only one algorithm.
Styles APA, Harvard, Vancouver, ISO, etc.
27

He, Dong Feng, Ai Jun Xu, Gang Yu et Nai Yuan Tian. « Dynamic Scheduling Method for Steelmaking-Continuous Casting ». Applied Mechanics and Materials 44-47 (décembre 2010) : 2162–67. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.2162.

Texte intégral
Résumé :
A method of dynamic scheduling of steelmaking-continuous casting is proposed, which includes static scheduling based on genetic algorithm and dynamic scheduling based on scheduling rules, mathematical model and complete rescheduling utilizing genetic algorithm. The simulation with eight hours’ production data in S steel plant showed that the method could draw quickly a high quality and performable dynamic scheduling plan according to random production disturbance. The average utilization rate of converter could reach 95% and the generation period of initial scheduling is less than 3 minutes. The max dynamic scheduling adjustment period did not exceed 1 minute.
Styles APA, Harvard, Vancouver, ISO, etc.
28

Zhang, Qi, La Dao Yang et Heng Wen. « A Mathematical Modeling of Heat Transfer in Continuous Casting Slab ». Applied Mechanics and Materials 44-47 (décembre 2010) : 33–37. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.33.

Texte intégral
Résumé :
A two-dimensional (2-D) heat transfer and solidification model has been established and applied to calculate the temperature distribution and solid shell thickness profile of a continuous casting slab in a steel plant. A finite difference method was used for the numerical simulation. For thermal analysis, the 2-D slice unsteady-state heat conduction equation with enthalpy convention was used. Meanwhile, non-linear material properties of specific heat and thermal conductivity as well as phase changes during solidification were considered in the model. The temperature distribution and solid shell thickness calculated by mathematical model agree with those predicted by industrial and experimental measurements. The model could also be used to predict the optimum process parameters on casting speed, heat removal rates and the water distribution of secondary cooling zone.
Styles APA, Harvard, Vancouver, ISO, etc.
29

Brezocnik, Miran, et Uroš Župerl. « Optimization of the Continuous Casting Process of Hypoeutectoid Steel Grades Using Multiple Linear Regression and Genetic Programming—An Industrial Study ». Metals 11, no 6 (17 juin 2021) : 972. http://dx.doi.org/10.3390/met11060972.

Texte intégral
Résumé :
Štore Steel Ltd. is one of the major flat spring steel producers in Europe. Until 2016 the company used a three-strand continuous casting machine with 6 m radius, when it was replaced by a completely new two-strand continuous caster with 9 m radius. For the comparison of the tensile strength of 41 hypoeutectoid steel grades, we conducted 1847 tensile strength tests during the first period of testing using the old continuous caster, and 713 tensile strength tests during the second period of testing using the new continuous caster. It was found that for 11 steel grades the tensile strength of the rolled material was statistically significantly lower (t-test method) in the period of using the new continuous caster, whereas all other steel grades remained the same. To improve the new continuous casting process, we decided to study the process in more detail using the Multiple Linear Regression method and the Genetic Programming approach based on 713 items of empirical data obtained on the new continuous casting machine. Based on the obtained models of the new continuous casting process, we determined the most influential parameters on the tensile strength of a product. According to the model’s analysis, the secondary cooling at the new continuous caster was improved with the installation of a self-cleaning filter in 2019. After implementing this modification, we performed an additional 794 tensile tests during the third period of testing. It was found out that, after installation of the self-cleaning filter, in 6 steel grades out of 19, the tensile strength in rolled condition improved statistically significantly, whereas all the other steel grades remained the same.
Styles APA, Harvard, Vancouver, ISO, etc.
30

Kovacic, M., et M. Brezocnik. « Reduction of Surface Defects and Optimization of Continuous Casting of 70MnVS4 Steel ». International Journal of Simulation Modelling 17, no 4 (15 décembre 2018) : 667–76. http://dx.doi.org/10.2507/ijsimm17(4)457.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
31

Cwudzinśki, A. « Mathematical Modeling and Industrial Experiment of Liquid Steel Flow in the Three Outlets Continuous Casting Bloom Tundish ». Archives of Metallurgy and Materials 58, no 4 (1 décembre 2013) : 1077–83. http://dx.doi.org/10.2478/amm-2013-0129.

Texte intégral
Résumé :
Abstract The dynamic development of the continuous steel casting (CSC) process has resulted in the application of this technology to the casting of steel semi-finished products on a mass scale. In the CSC process, before the cooling and solidification of liquid steel commences, the liquid metal dynamically flows through the steelmaking ladle, the tundish and the mould. Therefore, the control of steel flow is the key to the correct process. One of the metallurgical device in which the control of steel flow hydrodynamics is of crucial importance is the tundish. The subject of investigation within the present study was a three-nozzle tundish designed for casting of blooms. The software program Ansys-Fluent R was employed for the analysis of tundish operation. For the verification of the correctness of obtained results, an industrial experiment was carried out. For modification of the hydrodynamic conditions within the working volume of the tundish, two flow control devices were proposed, namely: a dam and a dam with an overflow window. The outcome of performed computer simulations were liquid steel flow fields and residence time distribution curves.
Styles APA, Harvard, Vancouver, ISO, etc.
32

Thomas, Brian G., et Lifeng Zhang. « Mathematical Modeling of Iron and Steel Making Processes. Mathematical Modeling of Fluid Flow in Continuous Casting. » ISIJ International 41, no 10 (2001) : 1181–93. http://dx.doi.org/10.2355/isijinternational.41.1181.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
33

Han, Tao, Chang Gui Cheng, Jun Xue Mei, Jia Fa Zhu et Yan Jin. « Optimization of Soft Reduction Process for Continuous Thick Slab Casting ». Advanced Materials Research 881-883 (janvier 2014) : 1558–61. http://dx.doi.org/10.4028/www.scientific.net/amr.881-883.1558.

Texte intégral
Résumé :
In this paper, a two-dimensional non-steady-state heat transfer model has been established for the working conditions of thick slab in a steel plant in China, a modification has been made on the basis of the nailing experimental results, the slab solidification difference of practice and prediction by field heat tracing model has been analyzed. The results show that the actual solidification end point of slab is more close to meniscus than prediction, the distance difference is 0.592m, the better soft reduction zone is from 0.2 to 0.9, which the level of central segregation can be reduced from the class B 1.0 to C 1.0.
Styles APA, Harvard, Vancouver, ISO, etc.
34

Kabakov, Z. K., I. A. Senatova et D. I. Gabelaya. « MATHEMATICAL MODELING OF GAP FORMATION BETWEEN BILLET AND MOLD AT STEEL CONTINUOUS CASTING ». Izvestiya Visshikh Uchebnykh Zavedenii. Chernaya Metallurgiya = Izvestiya. Ferrous Metallurgy 59, no 10 (1 janvier 2016) : 692–96. http://dx.doi.org/10.17073/0368-0797-2016-10-692-696.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
35

Kolenko, Tomaž, Anton Jaklič et Jakob Lamut. « Development of a mathematical model for continuous casting of steel slabs and billets ». Mathematical and Computer Modelling of Dynamical Systems 13, no 1 (février 2007) : 45–61. http://dx.doi.org/10.1080/13873950500521508.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
36

Maurya, Ambrish, et Pradeep Kumar Jha. « Mathematical Modelling of Solidification in a Curved Strand During Continuous Casting of Steel ». Journal of The Institution of Engineers (India) : Series C 98, no 1 (15 juin 2016) : 45–52. http://dx.doi.org/10.1007/s40032-016-0322-1.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
37

Hong, Xia, Zhong Bo Dong et Zhi Zheng Yang. « Analysis and Control of Micro-Alloy Steel in Continuous Casting Process ». Applied Mechanics and Materials 203 (octobre 2012) : 304–9. http://dx.doi.org/10.4028/www.scientific.net/amm.203.304.

Texte intégral
Résumé :
The paper analyzes the precipitation behavior of micro-alloy elements including Nb, V, Ti and its effect to ductility of the steel during thermal deformation process, study on relationship between Nb, C content and slab crack incidence rate, supply countermeasures to control crack incidence rate during continuous casting course from components adjustment and process discipline optimization.
Styles APA, Harvard, Vancouver, ISO, etc.
38

Liu, Li Jun, Zhi Wen, Fu Yong Su, Rui Feng Dou, Xun Liang Liu et Guo Feng Lou. « Research and Application of Integrated Scheduling Management System of Steelmaking-Casting-Rolling Based on Heat Process Model ». Advanced Materials Research 760-762 (septembre 2013) : 1017–22. http://dx.doi.org/10.4028/www.scientific.net/amr.760-762.1017.

Texte intégral
Résumé :
by studying steelmaking-casting-rolling production process, a mathematical model of integrated batch planning is established innovatively to minimize processing costs of whole line and computed by an intelligent optimization ant algorithm. On the premise of utilizing and coordinating capacity of steelmaking and rolling, the mathematical model of integrated batch planning can create integrated batch planning to combine steelmaking-casting-rolling closely according to each process constraint conditions and optimization objective. Furthermore, another mathematical model of job scheduling based on heat process model is proposed to not only guarantee the logistics balance between continuous casting and hot rolling, but also acquire the highest ratio of DHCR and lowest energy consumption.
Styles APA, Harvard, Vancouver, ISO, etc.
39

Yang, Shufeng, Lifeng Zhang, Jingshe Li et Kent Peaslee. « Structure Optimization of Horizontal Continuous Casting Tundishes Using Mathematical Modeling and Water Modeling ». ISIJ International 49, no 10 (2009) : 1551–60. http://dx.doi.org/10.2355/isijinternational.49.1551.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
40

Chen, Wei, Gaiyan Yang, Liguang Zhu, Gaoxiang Guo, Jiaqi Wang et Bo Wang. « Mold taper optimization for continuous casting of H-beam blanks ». Metallurgical Research & ; Technology 116, no 5 (2019) : 505. http://dx.doi.org/10.1051/metal/2019033.

Texte intégral
Résumé :
The objective of this study is to optimize the mold taper for continuous casting of H-beam blanks. A thermo-mechanical coupled mathematical model was established to analyze the heat transfer, solidification, and shrinkage of the strand in the mold based on the multiple load step method. Based on the simulation results of the air gap distribution in the mold, the mold taper was optimized at selected points on the surface of H-beam blank mold by minimizing the air gap thickness and the best taper scheme was proposed. The results show that the original mold tapers are relatively larger and the optimum mold tapers are as follows: (1) taper at the flange surface: 0.81%/m; (2) taper at the narrow face: 0.68%/m; (3) taper at the fillet: −1.44%/m. The optimum mold size obtained from taper optimization was used in the actual continuous casting process and based on the results, it can be concluded that the optimum mold taper scheme proposed in this study reduced the formation of surface cracks in H-beam blanks.
Styles APA, Harvard, Vancouver, ISO, etc.
41

Bellouar, A., C. Dumortier, Y. Riquier et H. Strebelle. « Optimization of steel flow in the continuous casting tundish by water model simulation ». Revue de Métallurgie 96, no 1 (janvier 1999) : 41–48. http://dx.doi.org/10.1051/metal/199996010041.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
42

Pan, Hong, Guo Rong Wu, Yong Chen, Jian Hua Zeng et Zhi Qiang Li. « Study on Control Technology of Transverse Corner Cracks on CC Slab for Automobile Frame Steel Plate ». Advanced Materials Research 295-297 (juillet 2011) : 636–40. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.636.

Texte intégral
Résumé :
There were serious transverse corner cracks on continuous casting slab of automobile frame steel plate in Panzhihua Steel before, and study on the control of transverse corner cracks had been carried out. Some effective countermeasures are put forward, such as the optimization of ratio of heat flux density on narrow side and broad side of casting slab (RHFD) and mold powder, as well as the stabilization of casting speed and working condition of caster. Industrial test shows that the transverse corner cracks on continuous casting slab have been significantly reduced, and the lines and peeling defects on hot rolled sheet have been eliminated due to the transverse corner cracks.
Styles APA, Harvard, Vancouver, ISO, etc.
43

Chen, Wei, Yu Zhu Zhang, Li Guang Zhu, C. J. Zhang et Bao Xiang Wang. « Optimization for Secondary Cooling Parameters in Continuous Casting of High Carbon Chromium Bearing Steel ». Advanced Materials Research 83-86 (décembre 2009) : 465–72. http://dx.doi.org/10.4028/www.scientific.net/amr.83-86.465.

Texte intégral
Résumé :
The high carbon chromium bearing steel, as a kind of special steel, entails high quality. The work aims to simulate the solidification process of continuous casting of high carbon chromium bearing steel, to find the cause for defect, and to optimize the secondary cooling parameters steel. A finite element model is developed to compute heat transfer and solidification in bearing continuous casting. By comparing the calculated data with the metallurgical constraints, the key factor caused the cracks on the strand can be found out. Then based on the subproblem approximation method, an optimization program is developed to search out the optimum cooling parameters. Those optimum parameters can meet all specified requirements but with a minimum expense of the operational and the design constraints and can make it possible to run the caster at its maximum productivity, minimum cost and to reduce the defects. Now, online verifying has been obtained with the cracks decreasing and the water consumption of secondary cooling zone saving.
Styles APA, Harvard, Vancouver, ISO, etc.
44

Ni, Peiyuan, Toshihiro Tanaka, Masanori Suzuki, Masashi Nakamoto, Mikael Ersson et Pär Göran Jönsson. « Mathematical Modelling Study of Dynamic Composition Change of Steel and Mold Flux in Continuous Casting of Steel ». ISIJ International 59, no 11 (15 novembre 2019) : 2024–35. http://dx.doi.org/10.2355/isijinternational.isijint-2019-007.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
45

Gornakov, Anton I. « MATHEMATICAL MODELING OF METAL FLOW UNDER THE NEW METHOD OF CONTINUOUS CASTING OF STEEL ». Scholarly Notes of Komsomolsk-na-Amure State Technical University 1, no 11 (30 septembre 2012) : 47–51. http://dx.doi.org/10.17084/2012.iii-1(11).7.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
46

Zhang, T., Z. G. Luo, C. L. Liu, H. Zhou et Z. S. Zou. « A mathematical model considering the interaction of bubbles in continuous casting mold of steel ». Powder Technology 273 (mars 2015) : 154–64. http://dx.doi.org/10.1016/j.powtec.2014.12.036.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
47

Chen, Wei, Lifeng Zhang, Yadong Wang, Sha Ji, Ying Ren et Wen Yang. « Mathematical simulation of two-phase flow and slag entrainment during steel bloom continuous casting ». Powder Technology 390 (septembre 2021) : 539–54. http://dx.doi.org/10.1016/j.powtec.2021.05.101.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
48

de Souza, Mauricio C., Aloísio C. Gomes, Allan M. C. Bretas et Martín G. Ravetti. « Models for scheduling charges in continuous casting : application to a Brazilian steel plant ». Optimization Letters 10, no 4 (15 mai 2015) : 667–83. http://dx.doi.org/10.1007/s11590-015-0901-8.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
49

Roy, Snehangshu, R. K. Singh, Kiran Kumar Keshari, N. Pradhan, M. Kumar, Antariksh Gupta, R. K. Patra, T. P. Shivshankar, R. Kiran et Basudev Mishra. « Reduction in Surface Defect in Continuous Cast Slab through Intervention in Process Parameters ». Materials Science Forum 978 (février 2020) : 91–96. http://dx.doi.org/10.4028/www.scientific.net/msf.978.91.

Texte intégral
Résumé :
Occurrence of defects like crack on the surface of the cast products has long been recognized as a critical challenge for steelmakers in the continuous casting. Cracks on the surface can severely reduce yield and required further operations like salvage and scarfing. Depending on the severity of defect slabs can be diverted or in worst cases a slab can be rejected altogether if the defect cannot be removed by surface conditioning. Rourkela Steel Plant (RSP) of Steel Authority of India Limited (SAIL) produces continuously cast slabs as feed material for plate mills and hot strip mill. Sometimes the slabs produced through continuous casting are faced issues intermittently due to presence surface defects like midface longitudinal cracks (LC) and transverse edge crack (EC) etc. A systematic investigation of the operating parameters of these casters e.g. monitoring of oscillation parameters, slabs and mould flux, simulation and analysis of fluid flow inside mould, steel chemistry and role of dissolve gases in steel. Based on the investigation critical parameters responsible for crack formation have been identified and key areas identified where modification need to be done. Modifications has been done in terms of mould flux addition practice, optimization of the grade chemistry, optimization of process route, optimization of casting speed, checking of strand thermal profile, mould & machine allignment etc. It was observed that the crack incidences are significantly lower after the modifications were done.
Styles APA, Harvard, Vancouver, ISO, etc.
50

Wang, Yang, Shufeng Yang, Feng Wang et Jingshe Li. « Optimization on Reducing Slag Entrapment in 150 × 1270 mm Slab Continuous Casting Mold ». Materials 12, no 11 (31 mai 2019) : 1774. http://dx.doi.org/10.3390/ma12111774.

Texte intégral
Résumé :
To reduce slag entrapment in 150 × 1270 mm slab continuous casting molds at the Tang Steel Company, the effect of submerged entrance nozzle (SEN) depth and casting speed on the phenomenon was studied by computational fluid dynamics simulations. Then, the slag entrapment behavior in continuous casting molds, utilizing Large Eddy Simulation (LES) by coupling the volume of fluid (VOF) method, was also used. Finally, the effect of several common oils usually used to simulate slag in water modelling on slag entrapment was discussed and the water modelling results were used to validate the numerical simulation findings. The results showed that the optimum scheme is a submerged depth of SEN 90 mm and a casting speed of 1.6 m/min. Under optimal conditions, the maximum surface velocity is smallest (0.335 m/s) and the maximum slag entrapment ratio (0.44%) appears in the position of 0.1 m below the meniscus after 15 s. The water modelling results were in good agreement with the numerical simulation results.
Styles APA, Harvard, Vancouver, ISO, etc.
Nous offrons des réductions sur tous les plans premium pour les auteurs dont les œuvres sont incluses dans des sélections littéraires thématiques. Contactez-nous pour obtenir un code promo unique!

Vers la bibliographie