A study on kinetics of Al_2O_3 inclusion absorbed by mold slag used for non-manganese steel

摘要

Dissolution kinetics of alumina into a new type CaO-Al_2O_3 mold slag was investigated by employing the rotating cylinder method. The results shows that the alumina dissolution was controlled by the mass transfer in the molten slag; the diffusion coefficient D=4.2×10~(-5)mm~2/s under 1400°C; the activation energy of dissolution process was 213.8 Kj/mol, this energy was higher than that of traditional mold slag; the ability of the new mold slag to absorb Al_2O_3 was weaker than that of traditional mold slag.