Study of heat transfer through layers of casting flux: experiments with a laboratory set-up simulating the conditions in continuous casting

The heat transfer through layers of casting flux has been studied with a la boratory set-up which consists of a water-cooled heat flux probe made of co pper and an electrically heated steel plate with a trough to hold the flux sample. The measured heat flux density values were converted to system cond uctivities k(sys) which contain the radiation/conduction conductivity in th e flux layer and the contact resistance at the probe side. It was found tha t k(sys) is almost independent from the layer thickness. Ten commercial cas ting fluxes were investigated and the data for k(sys) are given as function s of composition and strand surface temperature.