Phase Equilibria in the “FeO”-CaO-SiO2-Al2O3-MgO System for Blast Furnace Primary Slags
In modern iron blast furnace operations,utilising low grade iron ores and poor quality fuels is essential for low cost ironmaking.The accurate information of phase equilibria for complex slag system is necessary for better understanding the changes of slag chemistry in blast furnace.The compositions and liquidus temperatures of primary slag in cohesive zone was determined with the reduction of industrial sinters.The phase equilibria in the “FeO”-CaO-SiO2-Al2O3-MgO system with metallic iron saturation have been comprehensively investigated by quenching technique and EPMA analysis.The pseudo-ternary section(CaO+SiO2)-Al2O3-MgO at 50 wt%“FeO” was constructed and a series of pseudo-binaries were derived to be easily used in industrial applications.The major primary phase was found to be oxide”(Fe,Mg)O” and the liquidus temperatures increase significantly with increasing MgO in this primary phase field.Al2O3 has little effect on liquidus temperature in this primary phase field.Liquidus temperatures increase in melilite primary phase field and decrease in Ca2SiO4 primary phase field with increasing Al2O3 concentration.Liquidus temperatures are not sensitive to MgO concentration in both melilite and Ca2SiO4 primary phase fields.
ironmaking blast furnace liquidus temperature primary slag sinter
Jang Kyoung-oh Ma Xiaodong Zhu Jinming Xu Haifa Wang Geoff Zhao Baojun
School of Chemical Engineering,The University of Queensland,Brisbane,Australia Baoshan Iron and Steel Co.,Ltd.,Shanghai,China
国内会议
上海
英文
1-5
2015-10-21（万方平台首次上网日期，不代表论文的发表时间）