SiO2微粉对水泥结合铝镁质喷补料性能的影响  

Effect of silica micropowder on cement-bonded Al2O3-MgO gunning mix

作　　者：张青霞 聂建华[1] 李洪波 梁永和[1] 李维锋 蔡曼菲 李明昊 Zhang Qingxia;Nie Jianhua;Li Hongbo;Liang Yonghe;Li Weifeng;Cai Manfei;Li Minghao(The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;不详)

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉4300812 [2]上海利尔耐火材料有限公司,上海200949

出　　处：《耐火材料》2020年第5期390-394,共5页Refractories

基　　金：国家自然科学基金面上项目资助(51772222)。

摘　　要：为改善铝镁质喷补料的抗渣性能和抗热震性能,以板状刚玉、烧结镁砂、α-Al2O3微粉为主要原料,以铝酸钙水泥为结合剂,制备了铝镁质喷补料,研究了SiO2微粉添加量(质量分数分别为0、0.5%、1.0%、1.5%、2.0%)对其性能的影响。结果表明:1)SiO2微粉的加入可以减缓水泥和镁砂的水化速率。2)随SiO2微粉加入量的增加,喷补料的致密度、常温强度和抗渣性提高,但抗热震性能降低。3)综合考虑,SiO2微粉的合适加入量为1.5%~2%(w)。In order to improve the slag resistance and the thermal shock resistance of Al2O3-MgO gunning mix,tabular corundum,sintered magnesia andα-Al2O3 micropowder were adopted as the starting materials,calcium aluminate cement as the binder to prepare Al2O3-MgO gunning mix.The effect of the silica micropowder addition(0,0.5%,1.0%,1.5%,and 2.0%,by mass)on the properties of the gunning mix was studied.The results show that(1)the hydration rates of cement and magnesia are reduced by the addition of silica micropowder;(2)as the addition of silica micropowder increases,the density,the cold strength and the slag resistance of the gunning mix are gradually enhanced,but thermal shock resistance decreases;(3)comprehensively,the optimal addition of silica micropowder is 1.5%-2.0%.

关 键 词：SIO2微粉 铝镁质喷补料 抗渣性能 抗热震性能 

分 类 号：TQ175[化学工程—硅酸盐工业]