Two-dimensional Temperature Distribution of Strip in Preheating Furnace of Continuous Annealing Line

Abstract

Two-dimensional temperature distributions of the steel strip are studied by the energy balance method with the aid of finite-element analysis. The space of the preheating furnace is divided into several enclosures in which the mechanisms of heat convection, heat radiation, and contact heat transfer are taken into account. The longitudinal and transverse temperature distributions of the strip are finally iteratively calculated by using the method of energy balance. The strip exhibits a significant temperature rise after contact with the rolls and shows a nonuniform temperature distribution along the width direction with smaller magnitude at two sides.

Temperature Distribution of Taper Rolls in Preheating Furnace of Cold Rolling Continuous Annealing Line

“…It can be seen that a good agreement can be found between them, as shown in Figure 9. In this study, the temperature of strip is estimated by an energy balance method first [6], which is closely related to surface temperature of the roll. Therefore, these two temperatures should be determined iteratively.…”

“…Consequently, several useful values throughout the length of the furnace, including strip and wall temperature, distributions of convective and radiative heat transfer rate in the strip, and rate of heat loss through the wall, can be easily obtained. Recently, the energy balance method was extended to predict two-dimensional (2-D) temperature distributions of a strip in which the effect of contact heat transfer was included [6].…”