Molten blast furnace slag (BF slag) was modified using liquid‐liquid mixing method for glass ceramics preparation, and the structure and viscosity of glass melt after modification were investigated. The BF slag proportion increased from 52.72 wt. % to 67.05 wt. %, and CaO/(SiO₂ + Al₂O₃) also varied from 0.33 to 0.47. The structure of BF slag melt after modification was investigated using ²⁹Si and ²⁷Al MAS NMR spectra. With increasing CaO/(SiO₂ + Al₂O₃), the amount of Q¹ remarkably increased while that of Q² decreased significantly. Specifically, when CaO/(SiO₂ + Al₂O₃) was more than 0.38, Q³ disappeared in glass melt. The viscosity of glass melt with CaO/(SiO₂ + Al₂O₃) of 0.47 exhibited a steep change at 1169°C, which was mainly caused by the sufficient crystallization of gehlenite confirmed by DTA cooling analysis, XRD, and FE‐SEM‐EDS analysis.

中文翻译：

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熔融高炉矿渣中玻璃熔体的结构，粘度和结晶

采用液-液混合法对高炉熔渣（BF渣）进行改性，制备玻璃陶瓷，研究了改性后玻璃熔体的结构和粘度。高炉渣比例从52.72 wt。％至67.05 wt。％和CaO /（SiO ₂  + Al ₂ O ₃）也从0.33变化到0.47。使用²⁹ Si和²⁷ Al MAS NMR光谱研究了改性后的高炉渣熔体的结构。随着CaO /（SiO ₂  + Al ₂ O ₃）的增加，Q ¹的含量显着增加，而Q ^2的含量则显着下降。具体而言，当CaO /（SiO ₂ + Al ₂ O ₃）大于0.38，Q ³在玻璃熔体中消失。CaO /（SiO ₂  + Al ₂ O ₃）为0.47的玻璃熔体的粘度在1169°C时出现急剧变化，这主要是由DTA冷却分析，XRD和FE-SEM证实的钠钙石充分结晶所致。 ‐EDS分析。