Abstract

The present study reports an experimental investigation of the effects of CaO/SiO₂ mass ratio (0.4 to 1.2) and Fe/SiO₂ ratio (1.26 and 1.7) on viscosity of the heterogeneous system of the CaO–SiO₂–FeO–Fe₂O₃–PbO–MgO–ZnO–S slag at 1300°C. The viscosity was measured using rotating cylindrical viscometer, and structure of quenched slags was studied by X-ray diffraction and SEM-EDS analysis. It was found that the viscosity of the slurry decreased with an increase in CaO/SiO₂ ratio and increased with an increase in Fe/SiO₂ ratio. The sulphur content in the slag decreases the FeO/Fe₂O₃ ratio in the liquid slag and consequently increases the viscosity. The FactSage thermodynamic software is utilized for the phase equilibrium and viscosity predictions. The effect of solid fractions in slag phase on the viscosity is calculated using the Einstein–Roscoe equation. Calculations show that an increase in solid fractions increases the viscosity of the slag phase.

中文翻译：

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CaO/SiO2 和 Fe/SiO2 比例对部分结晶硅酸盐炉渣 1300°C 粘度的影响

摘要

本研究报告了 CaO/SiO ₂质量比（0.4 至 1.2）和 Fe/SiO ₂比（1.26 和 1.7）对 CaO-SiO ₂ -FeO-Fe ₂非均相系统粘度影响的实验研究O ₃ -PbO-MgO-ZnO-S 炉渣，温度为 1300°C。使用旋转圆柱粘度计测量粘度，并通过X射线衍射和SEM-EDS分析研究淬火炉渣的结构。发现浆料的粘度随着CaO/SiO ₂比的增加而降低，随着Fe/SiO ₂比的增加而增加。炉渣中的硫含量降低了 FeO/Fe ₂ O ₃液渣中的比例，从而增加粘度。FactSage 热力学软件用于相平衡和粘度预测。渣相中的固体分数对粘度的影响使用爱因斯坦-罗斯科方程计算。计算表明，固体分数的增加会增加渣相的粘度。