基于CaO-SiO_2-FeO-Na_2O-Al_2O_3渣系的中高磷铁水脱磷试验研究  

STUDY ON DEPHOSPHORIZATION OF HIGH-PHOSPHORUS HOT METAL IN Ca O-SiO_2-Fe O-Na_2O-Al_2O_3 SLAG SYSTEM

作　　者：轩心宇 施哲[1] 漆鑫[1] 蔡加武 

机构地区：[1]昆明理工大学冶金与能源工程学院,昆明650093

出　　处：《矿冶》2015年第2期51-54,共4页Mining And Metallurgy

基　　金：云南省科技计划项目(14051395)

摘　　要：结合现有铁矿含磷高的实际情况,采用Ca O-Si O2-Fe O-Na2O-Al2O3渣系对中高磷铁水进行脱磷的试验研究。研究结果表明,脱磷渣系的碱度值ω(Ca O)/ω(Si O2)为4时,在相同试验条件下,分别用Al2O3、Na2O和Al2O3与Na2O的混合物代替常规的Ca F2时均可达到更高的脱磷效果;造渣剂分两次加入的脱磷效果比一次性加入的更好。当渣系中使用4%(Al2O3)+2%(Na2O)的复合熔剂,分两次加入时,铁水的终点脱磷率可达到96%。Regarding the actual situation of the high-phosphorus iron ore, the present paper studies the dephos- phorization of high-phosphorus hot metal by using CaO-SiO2-FeO-Na20-A1203 slag system. The results show that, under the same experimental conditions, when basicity of to （CaO）/to （ SiO2） was 4, the effects of dephosphoriza- tion using A12O3 , Na2O and the mixture of A12O3 and Na20 were better than that of using CaF2. The effects of de- phosphorization with twice-joining slags were better than the effects of once-joining. When the composite flux with 4% （A12O3） and 2% （Na2O） was used, and was added twice, the dephosphorization rate reached 96%.

关 键 词：高磷铁水 铁水预处理 钙系脱磷剂 脱磷 

分 类 号：TF533.2[冶金工程—钢铁冶金]