氟对连铸保护渣熔体、玻璃和晶体微结构的影响

连铸保护渣的物化性质与其结构密切相关。而氟化物对调节连铸保护渣高温物化性能具有重要作用，因此研究氟对多元硅酸盐结构影响有助于深入了解氟的作用特性，进而为环保型连铸保护渣的开发奠定理论基础。论文通过拉曼光谱研究了氟对保护渣高温熔体、玻璃及晶体中硅酸盐微结构单元的影响。结果表明：随着CaF₂含量的增加，硅酸盐微结构单元种类和相对数量发生变化，硅酸盐网络化程度降低，熔体粘度减小；在性能相近的无氟渣和高氟渣中，高氟渣晶体中硅酸盐微结构单元主要为单体结构硅酸盐，无氟渣主要为链状结构硅酸盐。论文研究结果对无氟保护渣的开发具有一定的指导意义。

Effect of Fluorine in Mould Fluxes on Microstructural Units of Silicates Slag

In the continuous casting of steel,mold fluxes play an important role in improving surface quality of casting strands and maintaining the continuous casting process.The physiochemical property of mold fluxes is definitely correlated with the microstructure.Fluorides play an important role in modifying the high temperature properties of mold fluxes.So,studying the effect of fluoride on multicomponent silicate structure is helpful to understanding the performance of fluoride in mould fluxes.In the present paper,effects of fluorine on melt,glass and crystal structure of silicate were studied by using Raman spectroscopy and in situ high temperature technique.The results were as follows: While the content of CaF2 increased,the varieties and relative quantities of microstructural units of silicates changed,the polymerization of the silicate network decreased,and the viscosity of the melt decreased;comparing non-fluoride with high-fluorine mold fluxes,the main kind of microstructure of silicates in mold fluxes with high fluorine was mostly monomer,while in fluorine free mold fluxes it was mainly chain of microstructure.It would help to develop fluorine free mold fluxes.