THE ANALYSIS OF STRUCTURE-CHEMICAL STATE OF DUPLEX SYSTEM OF SILICATES-SILICIDES OF ALKALINE EARTH METALS

Protsessy lit''ia Pub Date : 2022-12-01 DOI:10.15407/plit2022.04.003

B. Belov, A. Trotsan, O. Vlasova

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Abstract

The classification and structuring of oxide and metallic phases of binary duplex systems of silicates-silicides of alkaline earth metals are carried out in the work. This will determine the optimal composition of alkaline earth metal alloys based on silicon in the refining of ferrocarbon melts and modification of non-metallic inclusions. The ionic-molecular complexes of magnesium, oxygen and silicon are constructed in the work, which determine the mechanism of formation of non-metallic inclusions (magnesium silicates) in steel when using silicomagnesium alloys for refining. The parameters of chemical bonding for oxides with ionic bond type, for liquid silicomagnesium alloys having a metallic type of chemical bonding and for hard alloys with metal-covalent bond are determined. The presented results of structural and chemical analysis of the duplex system MgO–SIO2–Mg–Si allow to reveal the mechanisms of desulfurization processes and to develop technologies of blast furnace desulfurization in smelting and ladle treatment with furnace slag, magnesium and its alloys with silicon. Keywords: polygonal diagram, magnesium oxides, alkaline earth metal silicides, quantum mechanical parameters, classification and structuring.

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碱土金属硅酸盐-硅化物双相体系的结构-化学状态分析

本文对碱土金属硅酸盐-硅化物二元双相体系的氧化物相和金属相的分类和结构进行了研究。这将决定基于硅的碱土金属合金在精炼含铁熔体和改性非金属夹杂物中的最佳成分。本工作构建了镁、氧和硅的离子分子络合物，确定了使用硅镁合金精炼时钢中非金属夹杂物（硅酸镁）的形成机制。确定了具有离子键类型的氧化物、具有金属化学键类型的液态硅镁合金和具有金属共价键的硬质合金的化学键参数。MgO–SIO2–Mg–Si双相体系的结构和化学分析结果有助于揭示脱硫过程的机理，并开发高炉脱硫技术，用于炉渣、镁及其合金与硅的冶炼和钢包处理。关键词：多边形图，氧化镁，碱土金属硅化物，量子力学参数，分类和结构。

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Protsessy lit''ia

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8 weeks