scholarly journals Analysis of Non-Symmetrical Heat Transfers during the Casting of Steel Billets and Slabs

Metals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1380
Author(s):  
Adán Ramírez-López ◽  
Omar Dávila-Maldonado ◽  
Alfonso Nájera-Bastida ◽  
Rodolfo D. Morales ◽  
Jafeth Rodríguez-Ávila ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Cooling System ◽  
Heat Removal ◽  
Casting Process ◽  
Secondary Cooling ◽  
Continuous Casting Process ◽  
Predictive Capacity ◽  
Complete Control ◽  
Cooling Conditions ◽  
Heat Transfers

The current automation of steelmaking processes is capable of complete control through programmed hardware. However, many metallurgical and operating factors, such as heat transfer control, require further studies under industrial conditions. In this context, computer simulation has become a powerful tool for reproducing the effects of industrial constraints on heat transfer. This work reports a computational model to simulate heat removal from billets’ strands in the continuous casting process. This model deals with the non-symmetric cooling conditions of a billet caster. These cooling conditions frequently occur due to plugged nozzles in the secondary cooling system (SCS). The model developed simulates the steel thermal behavior for casters with a non-symmetric distribution of the sprays in the SCS using different boundary conditions to show possible heat transfer variations. Finally, the results are compared with actual temperatures from different casters to demonstrate the predictive capacity of this algorithm’s approach.

Secondary Cooling Water Distribution Strategy for Beam Blank Continuous Casting

2013 ◽  
Vol 706-708 ◽  
pp. 1553-1557
Author(s):  
Qiang Liu ◽  
Wei Feng Xue ◽  
Bing Mei Zou ◽  
Jian Wu Yan ◽  
Xiao Hua Peng ◽  
...  
Keyword(s):  
Continuous Casting ◽  
Water Distribution ◽  
Cooling System ◽  
Process Analysis ◽  
Cooling Water ◽  
Casting Process ◽  
Heat Transfer Process ◽  
Secondary Cooling ◽  
Continuous Casting Process ◽  
Distribution Strategy

This paper focus on the water distribution of secondary cooling for beam blank continuous casting process. Analysis of the influencing factors and initial determination method for important parameters of secondary cooling water, including specific water, water ratio in each secondary cooling zoon and the amount of water in outer arc, inner arc and sider at one secondary cooling zoon. After that, according to the simulation heat transfer process of the secondary cooling, to improve the secondary cooling system is given. This work provides a reference to the development of secondary cooling system.

Development of the Simulation Software for Secondary Cooling Heat Transfer in Beam Blank Continuous Casting Process Based on FLUENT

2012 ◽  
Vol 538-541 ◽  
pp. 2071-2076 ◽  
Author(s):  
Qiang Liu ◽  
Wei Feng Xue ◽  
Jian Wu Yan ◽  
Deng Fu Chen ◽  
Jian Feng Ma
Keyword(s):  
Heat Transfer ◽  
Mathematical Model ◽  
Continuous Casting ◽  
Cooling System ◽  
Casting Process ◽  
Spray Cooling ◽  
Simulation Software ◽  
Secondary Development ◽  
Secondary Cooling ◽  
Heat Transfer Simulation

A 2D mathematical Model for heat transfer during solidification in the secondary cooling was established on researching the process of beam blank continuous casting. Meanwhile, the boundary conditions of heat transfer was subdivided into four parts, which is the radiation, spray cooling, heat conduction through roller and water accumulated evaporation in secondary cooling zoon, and improved the results accuracy. Moreover, heat transfer simulation software was designed and developed by a 2D mathematical Model based on FLUENT. The secondary development language UDF (User Define Function) and Scheme (a dialect of LISP) of FLUENT were used during the development. The software provided a platform for researching on the solidification and optimization of a secondary cooling system for a caster machine of beam blank.

scholarly journals Analysis of Wetting Characteristics on Microstructured Hydrophobic Surfaces for the Passive Containment Cooling System

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Wei Zhao ◽  
Xiang Zhang ◽  
Chunlai Tian ◽  
Zhan Gao
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Performance ◽  
Cooling System ◽  
Heat Removal ◽  
Interface State ◽  
Transfer Performance ◽  
Hydrophobic Property ◽  
High Mechanical Strength ◽  
Feasible Solutions ◽  
Baxter Model

As the heat transfer surface in the passive containment cooling system, the anticorrosion coating (AC) of steel containment vessel (CV) must meet the requirements on heat transfer performance. One of the wall surface ACs with simple structure, high mechanical strength, and well hydrophobic characteristics, which is conductive to form dropwise condensation, is significant for the heat removal of the CV. In this paper, the grooved structures on silicon wafers by lithographic methods are systematically prepared to investigate the effects of microstructures on the hydrophobic property of the surfaces. The results show that the hydrophobicity is dramatically improved in comparison with the conventional Wenzel and Cassie-Baxter model. In addition, the experimental results are successfully explained by the interface state effect. As a consequence, it is indicated that favorable hydrophobicity can be obtained even if the surface is with lower roughness and without any chemical modifications, which provides feasible solutions for improving the heat transfer performance of CV.

scholarly journals Analysis of Non-Symmetrical Heat Removal during Cast-ing of Steel Billets and Slabs

2021 ◽  
Author(s):  
Adán Ramirez-Lopez ◽  
Omar Davila-Maldonado ◽  
Alfronso Nájera-Bastida ◽  
Rodolfo Morales ◽  
Jafeth Rodríguez-Ávila ◽  
...  
Keyword(s):  
Liquid Steel ◽  
Cooling System ◽  
Liquid Core ◽  
Heat Removal ◽  
Casting Process ◽  
Steel Shell ◽  
Steel Ladle ◽  
Ingot Casting ◽  
Friction Forces ◽  
Steel Section

Steel is one of the essential materials in the world's civilization. It is essential to produce many products such as pipelines, mechanical elements in machines, vehicles, profiles, and beam sections for buildings in many industries. Until the '50s of the 20th century, steel products required a complex process known as ingot casting; for years, steelmakers focused on developing and simplifying this process. The result was the con-tinuous casting process (CCP); it is the most productive method to produce steel. The CCP allows producing significant volumes of steel sections without interruption and is more productive than the formal ingot casting process. The CCP begins by transferring the liquid steel from the steel-ladle to a tundish. This tundish or vessel distributes the liquid steel, by flowing through its volume, to one or more strands having wa-ter-cooled copper molds. The mold is the primary cooling system, PCS, solidifying a steel shell to withstand a liquid core and its friction forces with the mold wall. Further down the mold, the rolls drive the steel section in the SCS. Here the steel section is cooled, solidifying the remaining liquid core, by sprays placed in every cooling segment all around the billet and along the curved section of the machine. Finally, the steel strand goes towards a horizontal-straight free-spray zone, losing heat by radiation mechanism, where the billet cools down further to total solidification. A moving torch cutting-scissor splits the billet to the desired length at the end of this heat-radiant zone.

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