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首页> 外文期刊>ISIJ international >Development of a Quasi-chemical Viscosity Model for Fully Liquid Slags in the Al2O3–CaO–‘FeO’–MgO–SiO2 System: The Revised Model to Incorporate Ferric Oxide
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Development of a Quasi-chemical Viscosity Model for Fully Liquid Slags in the Al2O3–CaO–‘FeO’–MgO–SiO2 System: The Revised Model to Incorporate Ferric Oxide

机译：Al 2 O 3 –CaO–'FeO'–MgO–SiO 2 中的完全液态炉渣的拟化学粘度模型的建立系统：结合三氧化二铁的修订模型

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A model has been developed that enables the viscosities of the fully liquid slag in the multi-component Al_(2)O_(3)–CaO–FeO–Fe_(2)O_(3)–MgO–SiO_(2) system close to and at metallic iron saturation to be predicted within experimental uncertainties over a wide range of compositions and temperatures based on the Eyring equation to express viscosity. The model links both the activation and pre-exponential energy terms to the slag internal structure through the concentrations of various Si_(0.5)O, Me~(n+)_(2)O and Me~(n+)_(1)Si_(0.25)O viscous flow structural units, of which the concentrations are derived from a quasi-chemical thermodynamic model of the liquid slag. The model describes a number of slag viscosity features including the charge compensation effect specific for the Al_(2)O_(3)-containing systems. The present paper describes application of recent significant improvements in the model formalism to the multi-component system Al_(2)O_(3)–CaO–FeO–Fe_(2)O_(3)–MgO–SiO_(2), where both Fe~(2+) and Fe~(3+) effects on viscosity are individually evaluated. The present model reproduces viscosities of slags equilibrated with metallic iron, which mainly reflects Fe~(2+) effects on viscosity including the charge compensation effect of the Fe~(2+) as well as Ca~(2+) and Mg~(2+) cations on the formation of tetrahedrally-coordinated Al~(3+). The model can also reproduce the compositional tendency of viscosity of the SiO_(2)-free CaO–FeO–Fe_(2)O_(3) slag in air by incorporating the charge compensation effect of Fe~(3+) to form tetrahedral coordination by basic cations such as Ca~(2+) and Fe~(2+) and to indicate viscosity maximum at an intermediate composition. Further analysis of the behaviour of the Fe~(3+) cation in the silicate structure to describe corresponding effect on viscosities and to improve viscosity predictions is essential.
机译：已经开发了一个模型，该模型可以使多组分Al_（2）O_（3）–CaO–FeO–Fe_（2）O_（3）–MgO–SiO_（2）系统中的全液态炉渣的粘度接近在金属铁饱和度的基础上，可以根据表示粘度的Eyring方程在很大的组成和温度范围内的实验不确定性范围内进行预测。该模型通过各种Si_（0.5）O，Me〜（n +）_（2 / n）O和Me〜（n +）_（1 /的浓度将活化能和指数前能量项与矿渣内部结构联系起来n）Si_（0.25）O粘性流结构单元，其浓度来自液态炉渣的准化学热力学模型。该模型描述了许多炉渣粘度特征，包括特定于含Al_（2）O_（3）的系统的电荷补偿效应。本文介绍了模型形式主义的最新重大改进在多组分体系Al_（2）O_（3）–CaO–FeO–Fe_（2）O_（3）–MgO–SiO_（2）中的应用分别评估了Fe〜（2+）和Fe〜（3+）对粘度的影响。该模型再现了用金属铁平衡的炉渣的粘度，主要反映了Fe〜（2+）对粘度的影响，包括Fe〜（2+）以及Ca〜（2+）和Mg〜（ 2+）阳离子形成四面配位的Al〜（3+）。该模型还可以通过结合Fe〜（3+）的电荷补偿效应形成四面体配位，再现空气中不含SiO_（2）的CaO–FeO–Fe_（2）O_（3）炉渣的粘度组成趋势。通过碱性阳离子如Ca〜（2+）和Fe〜（2+）来表示中间组分的最大粘度。进一步分析Fe〜（3+）阳离子在硅酸盐结构中的行为以描述对粘度的相应影响并改善粘度预测至关重要。

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