Abstract

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.

Highlights

  • Steel is one of the essential materials in the world’s civilization

  • The simulation includes the curved region of the continuous casting machine (CCM) to appreciate details of the nonsymmetrical temperature profiles

  • The close-up of Figure 8b illustrates the influence of different spray disposals along the casting direction

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Summary

Introduction

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. Different from previous publications [23,24,35,36,42,43], the present work places emphasis on the non-symmetric cooling conditions of billets and slabs leading to nonsymmetric temperature profiles inside these sections This contribution describes the improvements of the mathematical model used in these simulations, characterized by its versatility and readiness for process analysis, process control, and machine design. Some authors simulated the billet thermal behavior during CCP considering only 1⁄4 or 1⁄2 of the cast section and assuming the symmetric heat removal as is described in Figure 3 [1,2,3,4,10,13,14,15,16,17]. FFigiguurere33. .BBililleltetfafcaecsesuusesdedininththeemmooldld. .InIntetrenrnalalananddexextetrenrnalalfafcaecsesrerefeferrtotoththeeininteternrnaal laannddeexxteternrnaal l rardadiuiussoof fththeemmacahchinineeraraddiuiussoof fththeecucurvrvaatuturere. .TThheehhetetflfloowwisissysymmmmeetrtircic[2[233].]

Heat Transfer and Conduction inside the Billet Core
Operating Conditions and Assumptions
Simulations and Results
Conclusions
Full Text
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