摘要
通过评价和优化有关热力学数据，利用冶金物理化学原理建立了钢铁冶金中最为重要的Ｆｅ－Ｓｉ－Ｃ三元体系与ＣＯ－ＣＯ２－ＳｉＯ混合气体间硅、碳迁移的热力学数学模型，计算了相关热力学数据并计算机绘制了该体系的ｐＣＯ２－ｐＳｉＯ和ｌｇｐＣＯ２－ｌｇｐＳｉＯ相平衡图。
In a metallurgical reactor, the gaseous composition is always one of the important factors influencing product quality. The reactions between gaseous phases and liquid alloys, especially the transfer mechanism of silicon and carbon between CO CO 2 SiO and liquid Fe Si C alloys, belong to the important domain of current metallurgical physicochemical research because of their usefulness in metallurgical industry. Thermodynamic data of ternary systems are relatively few,and usually have little reliability. Because of its major role in ferrous metal industry,the iron silicon carbon system is one of the widely investigated ternary systems, but significant disagreement still exists among activity data of silicon and carbon, particularly in concerning concentrated solutions. It is impossible to directly measure the real partial pressures of SiO and CO 2 in a blast furnace. The objective of this study is to derive the partial pressures of SiO and CO 2 containing gas from activities of silicon and carbon in liquid iron silicon carbon alloys. Based on W. Dresler′s formulas for activities of silicon and carbon in liquid iron silicon carbon alloys,a thermodynamic model suitable for the transfer of carbon and oxygen from gas mixtures of CO and CO 2 to liquid alloys is created and directly applied to thermodynamic calculations and to phase diagrams of the system, and it can also be used to examine the data and to simulate the courses of evolution of silicon and carbon transfer between the gas mixtures and liquid alloys in the system. Some of the calculation methods and the p CO 2 p SiO phase equilibrium diagrams, including the curves of equal activity values, are reported in the paper.
出处
《成都理工学院学报》
CSCD
1996年第4期96-102,共7页
Journal of Chengdu University of Technology
