氩站钢包顶渣起泡性能的实验研究

在实验室条件下采用钼丝挂渣法对氮微合金化HRB400钢筋氩站顶渣的发泡指数进行了测定。研究表明:当碱度在0.6~1.2之间,ω(MgO)为7%~20%时,碱度升高或ω(MgO)增加,能够有效抑制炉渣的起泡;高含量的CaF2(﹥6%)有利于抑制炉渣的起泡;Al2O3对炉渣的发泡指数影响并不明显。具有较弱的起泡性能的顶渣成分范围是:ω(CaO)/ω(SiO2)为0.8~1.2,ω(MgO)=10%~20%,ω(Al2O3)=9.45%,ω(CaF2)=2%,ω(FeO)2.02%。向顶渣中加入适量的CaO和MgO,可有效抑制顶渣的起泡。

Study on Foaming Property of Ladle Top Slag of Ar Station

The foaming index of the Ar station top slag of HRB400 nitrogen micro-alloyed steel bar was determined in laboratory with the molybdenum wire used to measure the height of foamed slag. The results show that at the basicity of 0.6-1.2 and ω（MgO）of 7%-20%, the rise of the basieity or ω（MgO）could restrain the slag foaming effectively. High content of CaF2 （〉6%） is beneficial for the inhibition of slag foaming. A1203 has little influence on the slag foaming property. The composition range of the top slag with weak foaming performance is as follows： ω（CaO）/ω（SiO2） of 0.8-1.2, ω（MgO） of 10%-20%, ω（Al2O3） of 9.45%, ω（CaF2） of 2% and ω （FeO） less than 2.02%.The addition of appropriate amount of CaO and MgO could control the foaming performance of the top slag effectively.