炉渣组分对CaO-Al_2O_3-SiO_2-TiO_2-MgO-Na_2O渣系与铁液间硫分配比的影响  

Effect of composition on sulfur partition ratio between CaO-Al_2O_3-SiO_2-TiO_2-MgO-Na_2O slags and hot iron

作　　者：佟志芳[1] 姜喜远[1] 陈涛[2] 

机构地区：[1]江西理工大学冶金与化学工程学院,江西赣州341000 [2]湖南冶金职业技术学院冶金与材料系,湖南株洲412006

出　　处：《有色金属科学与工程》2016年第1期5-10,共6页Nonferrous Metals Science and Engineering

基　　金：国家自然科学基金资助项目(51174100);江西省自然科学基金资助项目(2010GZC0058);江西省教育厅资助项目(GJJ10474)

摘　　要：针对高碱度高氧化铝的Ca O-Al_2O_3-Si O_2-Ti O_2-Mg O-Na_2O六元渣系,通过在1 773 K温度下测定其与铁液间的硫分配比,研究该渣系的脱硫性能.利用偏最小二乘法回归分析,建立了可较好预测硫分配比的回归方程,利用回归方程分析了炉渣碱度(mCa O/mSi O_2)、Mg O、Ti O_2、Al_2O_3以及Na_2O对硫分配比的影响.结果表明,当炉渣碱度大于2.9时,炉渣硫分配比均在140以上,表明该渣系具有较强的脱硫能力.在实验范围内,硫分配比随炉渣碱度的增加而提高.当碱度一定时,Mg O对硫分配比的影响不大,Ti O_2、Al_2O_3均使硫分配比降低,其中Al_2O_3降低硫分配比较为明显.硫分配比随Na_2O增加而增加,少量的Na_2O即可明显提高炉渣的脱硫能力.The sulfur partition ratios between high basicity and high alumina CaO-Al2O3-SiO2-TiO2-MgO- Na2O slags with hot iron were experimentally determined at 1 773 K, and the desulfurization property of the slag was studied. The regression equation was established using the partial least squares regression analysis, which can well predict the sulfur partition ratio. The effects of basicity （CaO/SiO2）, MgO, TiO2, Al2O3 and Na2O on the sulfur partition ratio were analyzed with the regression equation. The results indicates that when the basicity is greater than 2.9, the sulfur partition ratios are all above 140, which indicates that the CaO-Al2O3- SiO2-TiO2-MgO-Na2O complex slag has stronger desulfurization ability. In experimental composition ranges, the sulfur partition ratio increase with basicity （mCa O/mSi O2） increasing. When the basicity is fixed, the effect of MgO on the sulfur partition ratio is not obvious. The addition of the TiO2 and Al2O3 decreases the sulfur partition ratio, especially the effect of Al2O3 is very obvious. The sulfur partition ratio increases with Na2O content increasing, and the small increase of Na2O content can improve the desulfurization ability of the slags.

关 键 词：CaO-Al2O3-SiO2-TiO2-MgO-Na2O渣系 硫分配比 回归方程 脱硫性能 

分 类 号：TF741.34[冶金工程—钢铁冶金]