BaO和Li_2O对CaO基脱硫精炼渣熔点和粘度的影响  

Effect of BaO and Li_2O on Melting Point and Viscosity of CaO-Based Refining Fluxes for Desulphuration

作　　者：李桂荣[1] 祝贞学[1] 戴起勋[1] 王宏明[1] 

机构地区：[1]江苏大学材料科学与工程学院,镇江212013

出　　处：《特殊钢》2005年第4期16-18,共3页Special Steel

基　　金：国家自然科学基金项目(50474037);江苏省高校自然科学研究项目(04BJK430022)

摘　　要：以CaO(bal)-SiO2(22.4%)-Al2O3(11.6%)-CaF2(10%)精炼渣作为基础渣系,用BaO、Li2O替代其中等量的CaO含量,固定(CaO+RxO)/SiO2=2.5(RxO代表BaO或者Li2O),对该脱硫精炼渣系的熔点和粘度进行了研究。结果显示在传统的CaO基熔渣中加入BaO、Li2O可以降低渣系的熔点和粘度,有效地改善了渣钢反应的动力学条件。当(BaO,Li2O)=15%时,熔渣的熔点分别为1267℃和1185℃,远低于不加添加剂时的熔点1326℃,当温度为1475℃时,熔渣粘度分别为0.98Pa·s和0.51Pa·s,远小于不加添加剂时的粘度1.79Pa·s,使渣系具有良好的流动性和熔化性能。The melting point and viscosity of refining fluxes for desulphuration have been studied, of which CaO (balance)-SiO_2(22.4%)-Al_2O_3(11.6%)-CaF_2(10%) refining slag was as basic flux, when the ratio of (CaO+RxO)/SiO_2 was fixed at 2.5 (where RxO- BaO or Li_2O), the BaO or Li_2O added and replaced equivalent CaO content in flux. The results showed that the melting point and viscosity of fluxes decreased by added BaO or Li_2O in CaO basic slag effectively to improve the dynamics condition of metal- slag reaction. With 15%BaO or 15%Li_2O, the melting point of flux was (1 267) ℃ or (1 185) ℃ which were far lower than that of flux free additions- 1326 ℃, and the viscosity of flux at (1 475) ℃ was 0.98 Pa·s or 0.51 Pa·s which were also far lower than that of flux free additions- 1.79 Pa·s to make the fluxes had excellent fluidity and melting capacity.

关 键 词：Li2O BAO CAO 粘度 熔点 脱硫 动力学条件 精炼渣系 熔化性能 添加剂 熔渣 流动性 渣钢 

分 类 号：TF769[冶金工程—钢铁冶金]