摘要
包钢高炉水淬渣可以直接制备出主晶相为镁黄长石的CaO-Al2O3-SiO2系微晶玻璃,而熔融保温时间对高炉水淬渣CaO-Al2O3-SiO2系微晶玻璃析晶方式和结晶活化能影响较大.现利用DTA测试方法对高炉水淬渣CaOAl2O3-SiO2系微晶玻璃于1 450℃熔融保温1,30,60 min后析晶动力学参数进行了测定,研究了熔融保温时间对包钢高炉水淬渣CaO-Al2O3-SiO2系微晶玻璃析晶活化能和晶化指数的影响.结果表明:随着熔融保温时间的延长,高炉水淬渣CaO-Al2O3-SiO2系微晶玻璃的析晶活化能E和频率因子v都呈先上升后下降的趋势,当熔融保温时间30 min时,其析晶活化能和频率因子最小,分别为E min=308 kJ/mol,v=1.5×1013s-1;其晶化指数n先增大后减小的趋势,熔融保温时间为30 min时,n>4,此时高炉水淬渣CaO-Al2O3-SiO2系微晶玻璃整体析晶.
The CaO-A1203-SiO2 system glass-ceramic with akermanite as its major crystalline phase can be produced by using the water quenched blast furnace slag of Baotou Iron and Steel （Group） Co.. However, the melting heat preservation time of the water quenched blast furnace slag glass-ceramic deeply impacts its crystallization activation energy and index. DTA method was adopt to test the crystallization kinetics parameters of the as-produced CaO-A1203-SiO2 system glass-ceramic under the glass-ceramic heat preservation time of 1, 30,60 rain following the molten temperature of 1 450 ℃. At the same time, the effect of the melting heat preservation time on the crystallization activation energy and crystallization index of the CaO-Al2O3-SiO2 system glass-ceramics as also researched. The results display that with increasing the glass-ceramic melting heat preservation time ,the crystallization activation energy E and frequency factor V of the water quenched blast furnace slag CaO-AI2 03-SiO2 system glass-ceramic has the trend of first rising, then falling. When the glass-ceramic melting heat preservation time is 30 min, the crystallization activation energy and frequency factor reached the smallest value as follows ： Emin = 308 kJ/mol, v = 1.5 × 1013 s^-1. The crystallization index n first increases then decreases, reaching the biggest value while the melting heat preservation time is 30 min. Meanwhile, when n is larger than 4, the process of the water quenched blast furnace slag glass-ceramic is indicated as bulk crystallization.
出处
《内蒙古科技大学学报》
CAS
2013年第3期212-215,224,共5页
Journal of Inner Mongolia University of Science and Technology
基金
内蒙古科技创新引导奖励基金资助项目(20111623)
关键词
高炉水淬渣
微晶玻璃
析晶活化能
water quenched blast furnace slag
glass-ceramics
crystallization activation energy
