Study on the Dissolution Behavior of Al₂O₃ for CaO-Al₂O₃ Based Slag

The dissolution behavior of Al₂O₃ in Ca O-Al₂O₃-B₂O₃ slag system during casting high Al and Mn steel was studied by rotating cylinder method. The effects of Al₂O₃ rod diameter,temperature and the composition of protective slag on the dissolution behavior of Al₂O₃ were investigated.All results show that for the the same type of mold powder at 1 300 ℃,the amount of Al₂O₃ dissolved increases with the Al₂O₃ rod’s diameter increasing in a certain period of time.Forthe same mold powder composition and rod diameter,the amount of Al₂O₃ dissolved will be increased with the rising temperature.While the amount of Al₂O₃ dissolution are the largest in slag No.2 at a certain diameter and temperature at 1 300 ℃.In addition,the dissolution rate of Al₂O₃ is found to be the largest on the slag surface.In addition,2#slag is superior to the other three kinds of mold fluxes in terms of the ability of slag to absorb Al₂O₃ and the performance stability after absorption.