Optimization of a Concasting Technology of a Steel Slab via Numerical Models

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The optimization of production on casters, with the aim of achieving maximum savings and maximum quality of the product is unthinkable without knowledge of the course of solidification and cooling of the slab. It is a global problem of 3D transient heat and mass transfer. If heat conduction within the heat transfer in this system is decisive, the process is described by the Fourier-Kirchhoff equation. It describes the temperature field of the solidifying slab in all three of its states (in the melt, in the mushy zone and in solid state). In order to solve these it is convenient to use the explicit numerical method of finite differences. Numerical simulation of the release of latent heats of phase or structural changes is carried out by introducing the enthalpy function dependent on temperature. The heat transfer coefficients are a function of the local cooling rate and surface temperature. Based on the results of previous investigations, the boundary conditions are set identically within each zone individually. The original 3D model had first been designed as an off-line version and later as an on-line version so that it could work in real time.

consating, slab, optimization, temperature field, numerical models

2009-05-31

Dalhousie university

Halifax, Canada

978-0-9812768-0-9

Proceedings 22nd Canadian congress of applied mechanics

4–5

2