CaO-Al2O3基连铸保护渣对Al2O3溶解行为的研究

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

采用旋转柱体法,研究了高铝高锰钢连铸过程中CaO-Al2O3-B2O3渣系对Al2O3的溶解行为,考察了Al2O3棒直径、温度和保护渣成分对Al2O3溶解行为的影响。结果表明,在一定时间内,1 300℃下,同种保护渣中Al2O3的溶解量随Al2O3直径的增大而增加;在一定直径和保护渣成分情况下,Al2O3的溶解量随温度的升高而增加;在一定直径和温度（1 300℃）下,2#渣中Al2O3的溶解量最大;Al2O3的溶解速率在熔渣液渣面处最大。此外,在保护渣吸收Al2O3能力及吸收后性能稳定性方面,2#渣优于其他三种保护渣。

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.