Laboratory Evaluation of Tundish Covering Powders and Rice Hull Ash on Cleanliness for a SAE 1055 Modified Steel

The continuous casting tundish is the last metallurgical reactor where molten metal flows before solidifying in mold. A covering powder can be used for improving steel cleanliness; this case it named ‘active slag’. objective of work to evaluate, laboratory, effect three kinds powders on cleanliness a SAE 1055 modified - Ca-aluminate, Ca-Mg-aluminate, and an Al-silicate powder, analysing their interaction with rice hull ash. forementioned materials were liquid steel, representing different which are industry: Al-silicate, Ca-aluminate. Experiments performed without top layer ash, simulating industrial conditions. Distribution, density, mean diameter inclusions measured through automated inclusion analyses. Through computational thermodynamics was possible evaluate deviation from saturation (considering Al2O3 MgO refractory) slag viscosity. It stated that Ca-aluminate gives better results regarding under laboratory