锂云母在铁水预处理中对CaO-FeO-CaF₂渣系脱磷的影响

来源期刊：钢铁钒钛2011年第1期

论文作者：李进 王一成 王明林 仇圣桃

文章页码：67 - 70

关键词：铁水预处理； 脱磷； 锂云母； CaO-FeO-CaF₂渣系

Key words：hot metal pretreatment； dephosphorization； lepidolite； CaO-FeO-CaF₂ slags

摘    要：在实验室1 340～1 360℃条件下,进行了CaO-FeO-CaF₂渣系中添加锂云母的铁水预处理脱磷试验。研究了锂云母添加量对渣系熔点和脱磷效果的影响,以及(CaO+锂云母)/FeO对脱磷的影响。研究结果表明:CaO-FeO-CaF2渣系随锂云母含量的增加,渣系熔点逐渐降低;在1 340～1 360℃,将铁水中的硅含量控制在0.01%左右,w_CaO/w_FeO=1.29,添加10%锂云母可以将铁水中的磷含量降低到0.005%;在2%萤石、10%锂云母条件下,w_{(CaO+锂云母)}/w_FeO在1.83～1.86范围内脱磷率最高可以达到95%。

Abstract: At 1 340～1 360℃ under laboratory conditions,the research on the dephosphorization of the CaO-FeO-CaF₂ slags additive lepidolite in hot metal pretreatment has been completed.Influences of lepidolite additive quantity on the slag melting point and dephosphorization effects have been researched.The results show that with lepidolite content increasing,the melting point of CaO-FeO-CaF₂ slags decreases;at 1 340～1 360℃,the silicon content is controlled at 0.01% in the molten iron,and when w_CaO/w_FeO=1.29,adding 10% lepidolite to the hot metal,the phosphorus content can be down to 0.005%;In the conditions of 2% fluorite and 10% lepidolite,when w_{(CaO+lepidolite)}/w_FeO in the range of 1.83～1.86,the dephosphorization rate of molten iron can be maintained at 95%.