Structural Characteristics of CaO-SiO2-Al2O3-FeO Slag with Various FeO Contents Based on Molecular Dynamics Simulations

Structural Characteristics of CaO-SiO2-Al2O3-FeO Slag with Various FeO Contents Based on Molecular Dynamics Simulations
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基于分子动力学模拟的不同FeO含量CaO-SiO2-Al2O3-FeO渣的结构特征

DOI:
10.1007/s11837-020-04511-y
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发表时间:
2021-01
期刊:
JOM
影响因子:
2.6
通讯作者:
Bi Zhisheng
Bi Zhisheng
中科院分区:
材料科学3区
文献类型:
--
作者:
Ma Shufang;Li Kejiang;Zhang Jianliang;Jiang Chunhe;Sun Minmin;Li Hongtao;Wang Ziming;Bi Zhisheng

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采用分子动力学模拟方法对CaO-SiO_2-Al_2O_3-FeO四元渣系的结构和性能进行了理论计算,以了解FeO含量对渣的结构和性能的影响。用径向分布函数、配位数、扩散系数等表征了炉渣的结构特征。粘度是高炉炼铁的重要物理性质之一,对高炉氧化冶金过程有重要影响。研究结果表明,随着FeO含量的增加,CaO-SiO_2-Al_2O_3-FeO渣系的网络结构被破坏,各原子的扩散系数增大,体系粘度降低,表明CaO-SiO_2-Al_2O_3-FeO渣系的聚合结构趋于解聚。因此,高炉渣中的FeO对CaO-SiO_2-Al_2O_3-FeO系渣的结构特征有很大的影响。
Molecular dynamics simulations are used to theoretically calculate the structure and properties of the CaO-SiO2-Al2O3-FeO quaternary slag system with the aim of understanding the influence of the FeO content on the slag structure and properties. The radial distribution function, coordination number, diffusion coefficient, etc. are used to characterize the structural characteristics of the slag. Viscosity is one of the important physical properties in blast furnace ironmaking, having an important influence on the blast furnace oxidation metallurgy process. The results of this study indicate that, as the FeO content is increased, the network structure is destroyed, the diffusion coefficient of each atom increases, and the system viscosity decreases, indicating that the polymerization structure of the CaO-SiO2-Al2O3-FeO slag system tends to be depolymerized. Based on these results, FeO in blast furnace slag has a great influence on the structural characteristics of CaO-SiO2-Al2O3-FeO slag.
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