The viscosity, melting proprieties, and molten structure of the high-Al silicon–manganese slag of SiO₂–CaO–25 mass% Al₂O₃–MgO–MnO–K₂O system with a varying MgO and K₂O content were studied. The results show that with the increase in MgO content from 4 to 10 mass%, the measured viscosity and flow activation energy decreases, but K₂O has an effect on increasing those of slags. However, the melting temperature increases due to the formation of high-melting-point phase spinel. Meanwhile, Fourier transform infrared (FTIR) and X-ray photoelectron spectra (XPS) were conducted to understand the variation of slag structure. The O²⁻ dissociates from MgO can interact with the O⁰ within Si–O or Al–O network structures, corresponding to the decrease in the trough depth of [SiO₄] tetrahedral and [AlO₄] tetrahedral. However, when K₂O is added into the molten slag, the K⁺ can accelerate the formation of [AlO₄] tetrahedra, resulting in the increase in O⁰ and O⁻ and the polymerization of the structure.

中文翻译：

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MgO和K2O对高铝硅锰合金炉渣粘度和结构的影响

SiO ₂ –CaO–25质量％Al ₂ O ₃ –MgO–MnO–K ₂ O体系的高Al硅锰锰渣的粘度，熔融特性和熔体结构随MgO和K ₂ O含量的变化而变化。研究。结果表明，随着MgO含量从4质量％增加到10质量％，测得的粘度和流动活化能降低，但是K ₂ O对增加炉渣的含量有影响。但是，由于形成了高熔点的尖晶石，所以熔融温度上升。同时，进行了傅立叶变换红外光谱（FTIR）和X射线光电子能谱（XPS），以了解炉渣结构的变化。O ²⁻与MgO分离的金属可以与Si-O或Al-O网络结构中的O ⁰相互作用，这对应于[SiO ₄ ]四面体和[AlO ₄ ]四面体的槽深度的减小。然而，当K ₂ O的加入到熔融炉渣，K个⁺可加速形成[的AlO ₄ ]四面体，导致增加为O ⁰和O ^-和结构的聚合。