BaCO_3基熔剂对锰铁熔体脱磷的实验研究  

Experimental study on dephosphorization of ferromanganese melt by BaCO_3-based flux

作　　者：吴宝国[1] 董元篪[1] 王世俊[1] 陈二保[1] 郭上型[1] 

机构地区：[1]安徽工业大学冶金与材料学院,安徽马鞍山243002

出　　处：《包头钢铁学院学报》2001年第3期256-260,共5页Journal of Baotou University of Iron and Steel Technology

基　　金：国家自然科学基金资助项目 ( 5 97740 15 )

摘　　要：30 0℃时 ,在硅钼棒炉中采用BaCO3 BaF2 MnO2 系熔剂对w ([Si],i) =0 0 84%～ 0 2 45 %的锰铁合金进行脱磷实验 结果表明 ,只要改变渣系组成和脱磷处理时间适当 ,对不同硅含量的锰铁合金均可获得 5 0 %以上的脱磷率 采用BaCO3(w (BaCO3) =6 0 %～ 70 % ) BaF2 (w (BaF2 ) =10 % ) MnO2 (w (MnO2 ) =2 0 %～ 30 % )渣系脱磷时 ,锰的氧化损失为负值 脱磷保锰的最佳处理时间为 10～ 15min ,脱磷过程中熔体氧位在 5min内迅速上升到一定值 ,5min后氧位在很窄的范围内波动 改变渣系组成 :MnO2 的质量分数降到 10 % ,BaCO3 的质量分数从 6 0 %增至80 % ,对熔剂的最大脱磷率和其对应的氧位影响不大 ,最大脱磷率为 49 1%～ 5 6 2 % ,对应氧位在 0 35× 10 -6～0 5 0× 10The dephosphorization experiments of ferromanganese melt with w(,i) =0 084%～0 245%by BaCO 3 BaF 2 MnO 2 flux were performed in a MoSi 2 furnace at 1 300 ℃.The results show that so long as the flux composition is changed and dephosphorization time is suitable,about more than 50% phosphorization in ferromanganese melt with different Si contents can be moved into slag.Manganese was not lost during the dephosphorization treatment by BaCO 3(w(BaCO 3)=60%～70%) BaF 2(w(BaF 2)=10%) MnO 2(w(MnO 2)=20%～30%) flux.The optimum time of dephosphorization and Mn keeping is about 10 to 15min.The oxygen potential in ferromanganese melt during dephosphorization is reached to a certain value about 5min and then changes only in a narrow range.When MnO 2 decreases from 30% to 10% and BaCO 3 increases from 60% to 80% in BaCO 3 based flux,the maximum dephosphorization rate and the oxygen potential relative to this maximum dephosphorization rate almost don't change.The oxygen potential relative to this maximum dephosphorization rate changes from 0 35×10 -6 to 0 50×10 -6 .

关 键 词：BaCO3熔剂 锰铁 脱磷 氧位 炼钢 脱氧剂 

分 类 号：TF542[冶金工程—钢铁冶金]