Effect of Fluorine in Mould Fluxes on Microstructural Units of Silicates Slag
HE Sheng-ping1,YOU Jing-lin2,WANG Qian1,XU Chu-shao1
1. College of Materials Science and Engineering of Chongqing University, Chongqing 400044, China 2. Shanghai Enhanced Laboratory of Modern Metallurgy and Material Processing, Shanghai University, Shanghai 200072, China
Abstract：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.
Key words：Mold fluxes;Fluorine;Raman spectroscopy;Microstructural units
何生平1,尤静林2,王谦1,徐楚韶1. 氟对连铸保护渣熔体、玻璃和晶体微结构的影响[J]. 光谱学与光谱分析, 2008, 28(11): 2579-2582.
HE Sheng-ping1,YOU Jing-lin2,WANG Qian1,XU Chu-shao1. Effect of Fluorine in Mould Fluxes on Microstructural Units of Silicates Slag. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2008, 28(11): 2579-2582.
