On the Total Heat Exchange Factor of the Slab Reheating Furnace Basing on the Slab Reheating Experiment

Abstract

A study has been made of the total heat exchange factor in the steel slab reheating furnace based on the experimental data and the radiation heat transfer theory.
The total heat exchange factor φCG can be estimated as follows:
φCG=0.64 for heavy oil firing, and φCG=0.3 for gas firing
when the furnace gas temperature is determined by the readings of the thermocouple inserted into the furnace combustion chamber through the furnace wall.
By a heat transfer simulation using the value of φCG, an examination was made on HAYS'S experimental formula for the furnace retention time of slabs.