【作者】 丁汝才； 史成斌； 郭汉杰； 焦晋沙； 杨学民；

【Author】 DING Ru-cai~1,SHI Cheng-bin~1,GUO Han-jie~1,YANG Xue-min~2,JIAO Jin-sha~2 1 School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,P.R.China 2 State Key Lab of Multiphase Complex Systems,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,P.R.China

【机构】 北京科技大学冶金与生态工程学院； 中国科学院过程工程研究所多相复杂系统国家重点实验室；

【摘要】 CaO-SiO₂-MgO-Al₂O₃渣系中结构单元或离子对的质量作用浓度能够像传统意义上的活度一样表征其反应能力。因此,基于离子与分子共存理论,本文通过计算高炉炉渣中结构单元或离子对的质量作用浓度,建立了计算CaO-SiO₂-MgO-Al₂O₃高炉渣系与碳饱和铁液间硫分配比的通用热力学模型。计算出的总的硫分配比与脱硫实验实测的硫分配比结果相吻合。此外,通用热力学模型能够定量地计算出渣中自由CaO和自由MgO各自对炉渣脱硫的贡献。1773K时,自由CaO对炉渣脱硫有97%的贡献,而自由MgO的贡献只有3%。更多还原

【Abstract】 The calculated mass action concentrations of structural units or ion couples in CaO-SiO₂-MgO-Al₂O₃ ironmaking slags can be applied to exhibit their reaction ability,like classic concept of activity.Based on the ion and molecule coexistence theory,a thermodynamic model for calculating sulphur distribution ratio between CaO-SiO₂-MgO-Al₂O₃ ironmaking slags and carbon saturated hot metal has been developed by using a thermodynamic model for calculating mass action concentrations of structural units or ion couples in ironmaking slags.The calculated total sulphur distribution ratio shows an acceptable agreement with the tested sulphur distribution ratio between CaO-SiO₂-MgO-Al₂O₃ ironmaking slags and carbon saturated hot metal from desulphurization experiments at 1773K.In addition,the developed thermodynamic model for calculating sulphur distribution ratio between CaO-SiO₂-MgO-Al₂O₃ ironmaking slags and carbon saturated hot metal can quantitatively determine the respective contribution of free CaO and free MgO in CaO-SiO₂-MgO-Al₂O₃ slags.An obvious difference of desulphurization ability between free CaO and free MgO can be found with free CaO accounting for 97%desulphurization potential comparing with only 3%for free MgO in CaO-SiO₂-MgO-Al₂O₃ slags equilibrated with carbon saturated hot metal at 1773K.更多还原