摘要
根据炉渣结构的共存理论、CaO-SiO_2、CaO-FeO-SiO_2相图及有关的热力学数据,推导了1600℃下CaO-FeO-SiO_2渣系作用浓度的计算模型。用此模型计算得的等N_(FeO)曲线族与实测等~αFeO线甚为符合。等N_(FeO)线的顶点位于碱度B=1.703～1.778之间,因此,脱碳和沉淀脱氧时,应当尽可能保持此碱度,而扩散脱氧时则应避开此碱度。硅酸盐的等作用浓度曲线族与相应炉渣区间的等温线相似的事实说明硅酸盐是影响本渣系熔点的重要因素。
In accordance with the coexistence theory of slag structure, CaO-SiO2 and CaO-FeO-SiO2 phase diagrams and corresponding thermodynamic data, a calculating model of mass action concentrations for CaO-FeO-SiO2 melts at 1 600℃ has been deduced. The calculated contours of iso-mass action concentration NFeo are fairly identical with the contours of iso-activity αFeo measured. The apices of iso-NFeo contours are located at the range of slag basicity 1.703 to 1,778, so for the decarburization and precipitation deoxidation the slag basicity had better be kept in that range, and on the contrary for diffusion deoxi- dation the slag basicity had better be kept off that range. Similarity of iso-silicates mass action concentration contours to the corresponding iso-thermal contours of CaO-FeO-SiO2 phase diagram shows that silicates play an important role in the melting temperatures of slag system mentioned.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
1991年第3期214-221,共8页
Journal of University of Science and Technology Beijing
关键词
炼钢
渣系
作用浓度
CaO-FeO-SiO2
the coexistence theory of slag structure, mass action concentration, CaO-FeO-SiO2 slag system
