The Physical and Mathematical Modeling of Tundish Operations

ISBN-13: 9781461396284 / Angielski / Miękka / 2011 / 111 str.

Julian Szekely; Olusegun J. Ilegbusi

Opis

In recent years it has been recognized that tundishes playa critical role in affecting the quality of the finished steel products. Furthermore, proper tundish design may be even more important in the development of the novel continuous casting pro cesses that are now in varying stages of realizatic)ll. Traditionally, physical modeling has played a key role in tundish design, but the recently evolved computational software packages, the readily accessible computa tional hardware, and, perhaps most important, the growing experience with tackling a broad range of computational fluid flow problems within a metallurgical context have made mathematical modeling an important factor in this field. Our aim in writing this book has been to bring realistic perspectives to tundish design. The main purpose is to provide a good physical understanding of what is happening in tundishes, together with a realistic discussion of topics that are still not quite clear. The process metallurgist active in this field has many tools at his or her disposal, including mathematical modeling, physical modeling, and measure ments on full plant-scale systems. In this monograph we seek to show how these ideas may be combined to provide a good basic understanding and, hence, an attempt at an optimal design."

Spis treści

1 Introduction.- 1.1 Introduction.- 1.2 Flotation of Inclusions.- 1.3 Vortexing.- 1.4 Flow Instabilities and Wave Formation.- 1.5 Tundish Metallurgy and Tundish Heating.- References.- 2 Review of Fluid Mechanics Fundamentals.- 2.1 Fluid Flow Regimes: Laminar and Turbulent Flows.- 2.2 The Implication of Fluid Flow Fundamentals to Tundish Design and Operation.- 2.3 Concluding Remarks.- 2.4 Summation.- References.- 3 The Physical Modeling of Tundish Systems.- 3.1 The Principles of Physical Modeling.- 3.2 Continuous Flow Systems and Tracer Studies.- 3.3 Summation.- References.- 4 Computed Results on Tundish Systems.- 4.1 General Formulation of Flow Phenomena in Tundishes.- 4.2 Conventional Tundishes: Fluid Flow, Tracer Dispersion, and Inclusion Behavior.- 4.3 Conventional Tundishes: Heat Transfer.- 4.4 Magnetic Flow Control in Tundishes.- 4.5 Shallow Tundish Behavior.- 4.6 Free Surface Phenomena and Wave Formation.- References.- 5 Concluding Remarks.- 5.1 Main Findings.- 5.2 Strategy for Optimal Tundish Design.