Identification of Convection Heat Transfer Coefficient of Secondary Cooling Zone of CCM based on Least Squares Method and Stochastic Approximation Method

TL;DR

This paper develops a mathematical model for heat transfer in steel casting, focusing on estimating the convective heat transfer coefficient in the secondary cooling zone using least squares and stochastic approximation methods.

Contribution

It introduces a novel combined approach for identifying the convective heat transfer coefficient in a complex heat transfer model of continuous casting.

Findings

Successful estimation of heat transfer coefficient using proposed algorithms

Enhanced accuracy in modeling secondary cooling heat transfer

Applicable to real-time process control in continuous casting

Abstract

The detailed mathematical model of heat and mass transfer of steel ingot of curvilinear continuous casting machine is proposed. The process of heat and mass transfer is described by nonlinear partial differential equations of parabolic type. Position of phase boundary is determined by Stefan conditions. The temperature of cooling water in mould channel is described by a special balance equation. Boundary conditions of secondary cooling zone include radiant and convective components of heat exchange and account for the complex mechanism of heat-conducting due to airmist cooling using compressed air and water. Convective heat-transfer coefficient of secondary cooling zone is unknown and considered as distributed parameter. To solve this problem the algorithm of initial adjustment of parameter and the algorithm of operative adjustment are developed.