基于FactSage计算优化转炉脱磷工艺的基础研究  

Optimization of converter dephosphorization process by simulation calculation based on FactSage

作　　者：朱山 张琳 李松 ZHU Shan;ZHANG Lin;LI Song(School of Chemistry and Materials Engineering,Liupanshui Normal University,Liupanshui 553000,China)

机构地区：[1]六盘水师范学院化学与材料工程学院,六盘水553000

出　　处：《四川大学学报（自然科学版）》2022年第5期123-132,共10页Journal of Sichuan University(Natural Science Edition)

基　　金：六盘水市创新团队(52020-2019-05-08);贵州省科技厅基础研究计划(黔科合基础[2019]1292号);贵州省教育厅重点领域项目(黔教合KY字[2020]049);六盘水师范学院高层次人才科研启动基金(LPSSYKYJJ201809);六盘水师范学院重点学科项目(LPSSYZDXK202001);贵州省科技厅平台项目(黔科合平台人才[2019]5604号);六盘水重点实验室项目(52020-2019-05-06);贵州省重点实验室项目(黔科合平台人才[2020]2001)。

摘　　要：本文将脱磷理论与FactSage软件相结合进行模拟计算,研究CaO、SiO_(2)、P_(2)O_(5)、MgO和FeO含量对熔化性温度的影响,并通过单因素分析、正交实验分析、方差分析和相图分析等找到最佳渣系含量组合.实验结果表明,SiO_(2)含量增加使熔化性温度降低,CaO含量的增加使熔化温度上升,MgO含量在3%~7.5%之间时完全熔化温度下降,P_(2)O_(5)含量的升高会降低熔化温度;CaO对开始熔化温度影响最大,SiO_(2)和FeO对完全熔化温度影响最大.开始熔化温度最低,各因子的最低值为:CaO=26%,SiO_(2)=24%,FeO=21%,P_(2)O_(5)=9.8%,MgO=9%;完全熔化温度最低,各因子的最低值为:CaO=38%,SiO_(2)=22.5%,FeO=18%,P_(2)O_(5)=5.3%,MgO=3%.通过分析CaO含量对FeO-SiO_(2)-P_(2)O_(5)相图、FeO含量对CaO-SiO_(2)-P_(2)O_(5)相图以及SiO_(2)含量对CaO-FeO-P_(2)O_(5)相图液相区的影响,我们发现随着CaO含量的增加,FeO-SiO_(2)-P_(2) O_(5)体系中液相区温度升高,其中1800℃液相区扩大;FeO含量对CaO-SiO_(2)-P_(2)O_(5)体系液相区影响较明显,尤其在15%~18%的FeO含量范围,1600℃温度区间不断扩大,并且增加了1400℃与1600℃温度区间;SiO_(2)含量的增加使CaO-FeO-P_(2)O_(5)体系的液相区减小,即体系的熔化性温度升高,从而使得渣中P_(2)O_(5)的含量降低,有利于脱磷.Dephosphorization has always been a high concern in the metallurgical industry.The melting temperature has a great impact on dephosphorization.Exploring the influence of main components in liq-uid steel on the melting temperature and the influence of different component contents on the liquid phase zone have laid a theoretical foundation for further optimizing dephosphorization process parame-ters.Therefore,this paper combines dephosphorization theory with factsage software for simulation cal-culation,the effects of CaO,SiO_(2),P_(2)O_(5),MgO and FeO contents on the melting temperature are studied,and finds the best slag content combination through single factor analysis,orthogonal experimental analysis,analysis of variance and phase diagram analysis.The experimental results show that the melting temperature decreases with the increase of SiO_(2)concentration,the melting temperature increases with the increase of CaO concentration,the complete melting temperature decreases when MgO is be-tween 3%~7.5%,and the melting temperature decreases with the increase of P_(2)O_(5)concentration.CaO has the greatest influence on the initial melting temperature,and SiO_(2)and FeO have the greatest influ-ence on the complete melting temperature.At the lowest initial melting temperature,the lowest values of various factors are:CaO=26%,SiO_(2)=24%,FeO=21%,P_(2)O_(5)=9.8%,MgO=9%,and at the low-est complete melting temperature they are:CaO=38%,SiO_(2)=22.5%,FeO=18%,P_(2)O_(5)=5.3%and MgO=3%.The effects of CaO content on FeO-SiO_(2)-P_(2)O_(5)phase diagram,FeO content on CaO-SiO_(2)-P_(2)O_(5) phase diagram and SiO_(2)content on the liquid phase region of CaO-FeO-P_(2)O_(5)phase diagram are analyzed and compared.The results show that with the increase of CaO content,the temperature of liquid phase region in FeO-SiO_(2)-P_(2)O_(5)system increases,and the liquid phase region at 1800℃expands.The increase of FeO content has an obvious effect on the liquid phase region of CaO-FeO-P_(2)O_(5)system,especially in the range of 15%~18%,the

关 键 词：转炉脱磷 FactSage 相图 熔化性温度 正交实验 

分 类 号：TF71[冶金工程—钢铁冶金]