摘要
CaO-SiO2-FeOx三元渣系和CaO-SiO2-P2O5-FeOx四元渣系是转炉脱磷用渣的主要子渣系,研究这两种渣系的热力学性质可为脱磷渣的高效利用提供理论依据。利于相图软件FactSage分别绘制了这两种渣系的相图,并分析了温度和氧分压对体系相平衡关系和液相线的影响规律。分析结果表明:升高温度会使这两种渣系的液相区扩大,初晶相稳定区域显著减小;降低氧分压会导致尖晶石固溶体相的初晶区消失,磷石英(SiO2)、伪硅灰石(CaSiO3)、α'-Ca2SiO4固溶体相减小。
CaO-SiO2-FeOx and CaO-SiO2-P2O5-FeOx slag systems are the primary oxide sub-systems of slag system during the converter dephosphorization process and the analysis of thermodynamic properties of this two slag systems will provide the essential theoretical foundation for the efficient utilization of the dephospborization slag. Based on the thermodynamic software package FactSage, both CaO-SiO2-FeO, and CaO-SiO2-P2O5-FeOx slag systems phase diagram were drawn, and the effect of temperature and oxygen partial pressure on the equilibrium phase relations and liqunlus was analyzed. The results showed that the liquid regions in two slag systems enlarged with the increase of temperature, the primary phase fields reduced distinctly; the primary phase fields of spinel solid solution phase disappeared with the reduce the oxygen partial pressure, while SiO2, CaSiO3 and a＇-Ca2SiO4 solid solution phase reduced.
出处
《山东冶金》
CAS
2012年第5期36-38,共3页
Shandong Metallurgy
