SiO_2微粉加入量对铝镁质湿法喷补料性能的影响  

Effect of microsilica addition on properties of alumina-magnesia wet gunning mix

作　　者：沈明科 魏国平 薛军柱 何波 Shen Mingke;Wei Guoping;Xue Junzhu;He Bo(Zhejiang Zili High Temperature Technology Co.,Ltd.,Shangyu 312300,Zhenjiang,China)

机构地区：[1]浙江自立高温科技有限公司,浙江上虞312300

出　　处：《耐火材料》2018年第3期217-220,共4页Refractories

摘　　要：为改善铝镁质喷补料的施工流动性,以72%(w)的板状刚玉,6%(w)的电熔镁砂,以及总量为22%(w)的氧化铝微粉、板状刚玉微粉和纯铝酸钙水泥制备了铝镁质湿法喷补料,并研究了SiO_2微粉加入量(外加质量分数分别为0、0.2%、0.5%、1.0%、1.5%、2.0%和2.5%)对其性能的影响。结果表明:1)当SiO_2微粉加入量为1%~2%(w)时,喷补料具有较好的流动性和泵送性能;2)添加2.5%(w)SiO_2微粉的试样经1 600℃热处理后生成少量霞石,将会降低材料的高温性能;3)110℃烘干后试样的强度随SiO_2微粉加入量的增加而升高,1 600℃处理后的试样强度随SiO_2微粉的增加而显著增大;4)当SiO_2微粉加入量为1.5%(w)时,试样1 600℃烧后的线膨胀率最小;5)试样的高温抗折强度随着SiO_2微粉加入量的增加逐渐下降,少量SiO_2微粉的加入对抗渣渗透有利。综合考虑,铝镁质湿法喷补料中SiO_2微粉加入1.5%(w)最佳。In order to improve the construction fluidity,the alumina-magnesia gunning mix was prepared using 72% of tabular alumina,6% of fused magnesia and 22% of alumina micropowder ＋ tabular corundum micropowder ＋ pure calcium aluminate cement as starting materials,extra adding microsilica. Effect of microsilica addition（0,0. 2%,0. 5%,1. 0%,1. 5%,2. 0%,and 2. 5%,by mass） on properties of the gunning mix was researched. The results show that：（1） the alumina-magnesia gunning mix performs good fluidity and pumpability with 1%-2% of microsilica;（2） a little nephelite forms in the gunning mix with 2. 5% of microsilica after fired at 1 600 ℃,pooring the hot properties;（3） with the microsilica addition increasing,the strength of alumina-magnesia gunning mix after drying at 110 ℃ and firing at 1 600 ℃ increases;（4） with1. 5% of microsilica,the gunning mix has the minimum linear expansion rate after fired at 1 600 ℃;（5） the hot modulus of rupture of alumina-magnesia gunning mix reduces with microsilica addition increasing,while the small amount of microsilica is beneficial to the slag penetration resistance. The optimized microsilica addition is 1. 5%.

关 键 词：SIO2微粉 铝镁质湿法喷补料 抗渣性能 高温抗折强度 

分 类 号：TQ175[化学工程—硅酸盐工业]