The Effect of Basicity on the Radiative Heat Transfer and Interfacial Thermal Resistance in Continuous Casting

The basicity of mold flux has been recognized to have a significant influence on the mold flux crystallization in continuous casting, which would in turn affect the heat-transfer rate between the solidified shell and mold. The research regarding the mold flux crystallization as well as its effect on the heat transfer has been conducted intensively. However, few studies have been developed to specify the effect of basicity introduced mold flux crystallization on the radiative heat transfer and interfacial thermal resistance in continuous casting. By using an infrared radiation emitter, a radiative heat flux was applied to a copper mold covered with a solid mold flux disk to simulate the heat-transfer phenomena in continuous casting. The crystallization behaviors of mold fluxes with different basicities and their impact on the radiative heat transfer were investigated dynamically. The interfacial thermal resistance between the solid mold flux and copper mold was also studied in this article. The results suggested that the basicity tends to enhance the mold flux crystallization, leading to the reduction of radiative heat-transfer rate and enlargement of interfacial thermal resistance.