Monitoring the degree of bulging of continuous-cast slabs in the secondary cooling zone of a continuous caster

Metallurgist ◽  
1984 ◽  
Vol 28 (5) ◽  
pp. 167-169
Author(s):  
G. N. Deryabina ◽  
O. V. Nosochenko ◽  
Z. V. Overchenko ◽  
O. I. Karpov ◽  
V. I. Shilov
Keyword(s):  
Continuous Caster ◽  
Cooling Zone ◽  
Secondary Cooling ◽  
Continuous Cast ◽  
Secondary Cooling Zone

Self-aligning support mechanism for continuous caster secondary cooling zone

Metallurgist ◽  
1979 ◽  
Vol 23 (12) ◽  
pp. 847-849
Author(s):  
M. Z. Levin ◽  
N. G. Pirozhenko ◽  
D. A. Dyudkin ◽  
A. M. Kondratyuk ◽  
V. N. Bordyugov
Keyword(s):  
Continuous Caster ◽  
Cooling Zone ◽  
Secondary Cooling ◽  
Support Mechanism ◽  
Secondary Cooling Zone

scholarly journals Optimal Control Method of Parabolic Partial Differential Equations and Its Application to Heat Transfer Model in Continuous Cast Secondary Cooling Zone

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Yuan Wang ◽  
Xiaochuan Luo ◽  
Sai Li
Keyword(s):  
Optimal Control ◽  
Partial Differential Equations ◽  
Differential Equations ◽  
Adjoint Problem ◽  
Parabolic Partial Differential Equations ◽  
Cooling Zone ◽  
Secondary Cooling ◽  
Continuous Cast ◽  
Partial Differential ◽  
Secondary Cooling Zone

Our work is devoted to a class of optimal control problems of parabolic partial differential equations. Because of the partial differential equations constraints, it is rather difficult to solve the optimization problem. The gradient of the cost function can be found by the adjoint problem approach. Based on the adjoint problem approach, the gradient of cost function is proved to be Lipschitz continuous. An improved conjugate method is applied to solve this optimization problem and this algorithm is proved to be convergent. This method is applied to set-point values in continuous cast secondary cooling zone. Based on the real data in a plant, the simulation experiments show that the method can ensure the steel billet quality. From these experiment results, it is concluded that the improved conjugate gradient algorithm is convergent and the method is effective in optimal control problem of partial differential equations.

Research on Solidification Numerical Simulation of Continuous Casting Slab Based on Nail-Shooting Experimentation

2011 ◽  
Vol 233-235 ◽  
pp. 2181-2184
Author(s):  
Liang Hua Feng ◽  
Miao Yong Zhu ◽  
Kun Liu
Keyword(s):  
Heat Transfer ◽  
Mathematical Model ◽  
Continuous Caster ◽  
Solidification Process ◽  
Cooling Zone ◽  
Secondary Cooling ◽  
Practical Result ◽  
Soft Reduction ◽  
Continuous Casting Slab ◽  
Secondary Cooling Zone

Mathematical model of heat transfer on solidification is established combined with the practical production situation of the continuous caster. The thickness of solidified slab shell in secondary cooling spot is determined by nail-shooting experimentation. Heat transfer coefficient on different secondary cooling zone is modified by nail-shooting result, thus the accuracy of the mathematical model is ensured. Comparing practical result with that calculated by mathematical model, it shows that modified model can simulate the heat transfer and solidification process, which can provide accurate end solidification spot and serve for soft reduction.

scholarly journals Comparison of Optimization-Regulation Algorithms for Secondary Cooling in Continuous Steel Casting

Metals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 237
Author(s):  
Michal Brezina ◽  
Tomas Mauder ◽  
Lubomir Klimes ◽  
Josef Stetina
Keyword(s):  
Convergence Rate ◽  
Water Flow ◽  
Steel Casting ◽  
Casting Process ◽  
Continuous Steel Casting ◽  
Continuous Steel ◽  
Cooling Zone ◽  
Secondary Cooling ◽  
Flow Rates ◽  
Secondary Cooling Zone

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.

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