期刊
INTERNATIONAL JOURNAL OF APPLIED GLASS SCIENCE
卷 11, 期 4, 页码 676-684出版社
WILEY PERIODICALS, INC
DOI: 10.1111/ijag.15054
关键词
CaO; (SiO2 + Al2O3); cooling; molten blast furnace slag; thermal properties; viscosity
资金
- National Key Technologies RD Program [2016YFB0601304]
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 Si-29 and Al-27 MAS NMR spectra. With increasing CaO/(SiO2 + Al2O3), the amount of Q(1) remarkably increased while that of Q(2) decreased significantly. Specifically, when CaO/(SiO2 + Al2O3) was more than 0.38, Q(3) disappeared in glass melt. The viscosity of glass melt with CaO/(SiO2 + Al2O3) of 0.47 exhibited a steep change at 1169 degrees C, which was mainly caused by the sufficient crystallization of gehlenite confirmed by DTA cooling analysis, XRD, and FE-SEM-EDS analysis.
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