CaO-Al_(2)O_(3)-SiO_(2)-TiO_(2)渣系脱硫热力学与实验研究  

The Study of Thermodynamic and Experiment for Desulfurization between CaO-Al_(2)O_(3)-SiO_(2)-TiO_(2) Slag and Hot Metal

作　　者：刘崇 张彩东 刘纲 李杰 丁志军[4] 田志强 王强 LIU Chong;ZHANG Caidong;LIU Gang;LI Jie;DING Zhijun;TIAN Zhiqiang;WANG Qiang(HBIS Material Technology Research Institute,Shijiazhuang 050023,China;National Information Research Center of Tsinghua University,Beijing 100084,China;Jiangyin Xingcheng Special Steel Works Co.Ltd.,Wuxi 214429,China;Shijiazhuang Iron&Steel Co.Ltd.,Shijiazhuang 050031,China)

机构地区：[1]河钢材料技术研究院,河北石家庄050023 [2]清华大学信息国家研究中心,北京100084 [3]江阴兴澄特种钢铁有限公司,江苏无锡214429 [4]石家庄钢铁有限责任公司,河北石家庄050031

出　　处：《工业加热》2024年第4期1-5,共5页Industrial Heating

摘　　要：以精炼渣为研究对象,为探索四元渣系CaO-Al_(2)O_(3)-SiO_(2)-TiO_(2)中各组元对炉渣脱硫能力的影响规律,基于分子离子共存理论,建立了CaO-Al_(2)O_(3)-SiO_(2)-TiO_(2)渣系结构单元的作用浓度控制方程,从而构建了渣-钢之间的硫分配比数学模型,定量表征了炉渣碱度、Al_(2)O_(3)含量以及TiO_(2)含量变化对硫分配比和脱硫率的影响程度,并与管式炉热态实验结果进行对比。热力学计算和热态实验结果表明:炉渣各组元对硫分配比影响的主次顺序为:碱度>TiO_(2)含量>Al_(2)O_(3)含量,对炉渣脱硫率影响的主次顺序为:碱度>w(Al_(2)O_(3))>w(TiO_(2));随着碱度的增加,脱硫率和磷分配比逐渐增加,随着Al_(2)O_(3)含量的增加,脱硫率和磷分配比逐渐降低,而随着TiO_(2)含量的增加,脱硫率和磷分配比先增加后降低。结合理论研究与热态实验,得出了四元CaO-Al_(2)O_(3)-SiO_(2)-TiO_(2)渣系的最佳配比:6<R<7、w(TiO_(2))<5%、25%<w(Al_(2)O_(3))<30%。Based On the coexistence theory of molecules and ions,the controlling equation of mass action concentrations for structural units of CaO-Al_(2)O_(3)-SiO_(2)-TiO_(2) slag system was established in order to explore the influence of each component in the system on the desulphurization ability of refining slag.The mathematical model of sulfur distribution ratio between slag and steel was constructed,and the influence of slag basicity,Al_(2)O_(3) content and TiO_(2) content on sulfur distribution ratio and desulfurization rate was quantitatively characterized,which was compared with the hot state experimental results of tube furnace.The results of thermodynamic calculation and hot state experiment show that the order of the influence of each component of slag on the sulfur distribution ratio is basicity>w(TiO_(2))>w(Al_(2)O_(3)),and the order of the influence on the desulfurization rate is basicity>w(Al_(2)O_(3))>w(TiO_(2));With the increase of alkalinity,the desulfurization rate and phosphorus distribution ratio increase gradually,and with the increase of w(Al_(2)O_(3)),the desulfurization rate and phosphorus distribution ratio decrease gradually,while with the increase of TiO_(2) content,the desulfurization rate and phosphorus distribution ratio increase first and then decrease.Based on the theoretical study and hot state experiments,the optimal composition of quaternary CaO-Al_(2)O_(3)-SiO_(2)-TiO_(2) slag system is obtained as follows:6<R<7,w(TiO_(2))<5%,25%<w(Al_(2)O_(3))<30%.

关 键 词：离子分子共存理论 脱硫率 硫分配比 

分 类 号：TF535.21[冶金工程—钢铁冶金]