Ironmaking & Steelmaking ( IF 2.1 ) Pub Date : 2021-08-01 , DOI: 10.1080/03019233.2021.1958632 Jian-bin Chen 1 , Jin-guang Li 1 , Rong Chu 1 , Ya-qin Sun 1
ABSTRACT
To understand the thermodynamic characteristics of the melting process for high manganese twinning-induced plasticity steel, the activity coefficient of FeO in molten slag of MnO–CaO–SiO2–FeO–MgO slag system with up to 52 mass% MnO was measured at 1450°C by the experiments of the iron equilibrium between liquid silver and molten slag under the mixed gas atmosphere of CO, CO2 and Ar. The effects of MnO, FeO and the basicity on the activity coefficient of FeO in molten slag were discussed. The relationships between the activity coefficients of FeO, the concentrations of FeO and MnO and the basicity ((mass% CaO + mass% MgO)/mass% SiO2) were investigated by the regression analysis method. The results show that the activity coefficient of FeO was proportional to the reciprocal of FeO concentration, and increased slightly with the increasing MnO, but slowly decreased by increasing the basicity under the research conditions.
中文翻译:
FeO在CaO-SiO2-MnO-FeO-MgO熔渣中的热力学活性
摘要
为了解高锰孪生诱导塑性钢熔炼过程的热力学特性,在 1450 时测量了 MnO–CaO–SiO 2 –FeO–MgO 渣体系(含高达 52 质量%的 MnO)熔渣中 FeO 的活度系数°C 通过在 CO、CO 2和 Ar混合气体气氛下液态银和熔渣之间的铁平衡实验得出。讨论了MnO、FeO和碱度对熔渣中FeO活性系数的影响。FeO的活度系数、FeO和MnO的浓度与碱度的关系((mass% CaO + mass% MgO)/mass% SiO 2) 通过回归分析方法进行调查。结果表明,FeO的活度系数与FeO浓度的倒数成正比,随MnO的增加略有增加,在研究条件下随着碱度的增加而缓慢下降。