Congregated electron phase and Wagner model applied in titanium distribution behavior in low-titanium slag  

凝聚电子相与Wagner模型在低钛渣下钛的分配行为中的应用（英文）

作　　者：王振阳[1] 张建良[1] 邢相栋[1] 刘征建[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《Transactions of Nonferrous Metals Society of China》2015年第5期1640-1647,共8页中国有色金属学报（英文版）

基　　金：Project(2012CB720401)supported by the National Basic Research Program of China;Project(2011BAC01B02)supported by the National Key Technology R&D Program of China

摘　　要：For studying the carbon thermal reduction rules of titanium in hot metal and providing a theoretical basis for the blast furnace（BF） hearth protection, the distribution behavior of titanium between low-titanium slag system of CaO-SiO2-MgO-Al2O3-TiO2 and hot metal was studied using analytical reagents in a temperature range from 1350 °C to 1600 °C. Through high temperature melting, rapid quenching, chemical analysis and thermodynamic model calculating, the results showed that the increase of reaction temperature, which improved the titanium distribution L（Ti） and lowered the system activity coefficient γsys, leads to the rise of equilibrium constant. Combined with Wagner and congregated electron phase models, the data obtained in distribution experiments were used to fit out the Gibbs free energy formula of titanium carbothermic reduction. Finally, the relations between the contents of Si and Ti in hot metal and the titanium load to reach the minimum w（Ti） for the formation of Ti C were given.为研究铁水中钛元素碳热还原反应规律,提供高炉护炉理论依据,利用高温熔炼、急速淬火、化学分析以及热力学模型计算等方法,在实验室条件下利用分析纯试剂研究在1350-1600°C间钛在低钛渣系CaO-SiO2-MgO-Al2O3-TiO2与铁水间的分配行为。研究结果表明,随着反应温度的增加,钛的分配比L（Ti）增加,但系统活度系数γsys降低,从而导致反应平衡常数升高。结合Wagner与凝聚电子相模型,通过对实验数据进行拟合,得到钛碳热还原反应的吉布斯自由能公式。最后,结合实验所得结果,给出了高炉铁水中w（Si）与w（Ti）含量的关系以及可以达到护炉效果的最小入炉钛负荷。

关 键 词：TITANIUM distribution behavior activity coefficient model hearth protection titanium load 

分 类 号：TF53[冶金工程—钢铁冶金]