不同二氧化硅微粉对矾土基低水泥浇注料性能的影响  

Influences of microsilica on properties of bauxite based low cement castables

作　　者：薛海涛[1] 顾华志[2] 彭云涛[1] 彭红 朱晶晶[2] 

机构地区：[1]中冶武汉冶金建筑研究院有限公司工业炉所,湖北武汉430081 [2]武汉科技大学耐火材料与高温陶瓷国家重点实验室培育基地,湖北武汉430081 [3]R&D Department,Elkem AS,Materials

出　　处：《耐火材料》2011年第5期338-340,共3页Refractories

摘　　要：研究了4种理化性能不同的二氧化硅微粉对矾土基低水泥浇注料流动性、抗热震性和高温抗折强度的影响。结果表明:加入纯度高,杂质含量少,颗粒分布均匀、集中,表面光滑,自身流动性好的二氧化硅微粉,则浇注料的流动性好,抗热震性好,高温抗折强度高;加入碳和碱金属含量高,颗粒粒度偏粗,表面粗糙,自身分散性差的二氧化硅微粉,则浇注料流动性差,抗热震性差,高温抗折强度低。Effects of four kinds of microsilica with different chemical compositions and physical properties on flowability,thermal shock resistance and hot modulus of rupture were investigated.The results indicate that when microsilica with high purity,uniform and centralized particle distribution,smooth surface and good flowability is added,the castables obtain good flowability,good thermal shock resistance,and high hot modulus of rupture;nevertheless,when microsilica with high contents of carbon and alkali metal,large particle size,rough surface and poor particle dispersion,the castables obtain poor flowability,bad thermal shock resistance,and low hot modulus of rupture.

关 键 词：二氧化硅微粉 矾土基浇注料 流动性 抗热震性 高温抗折强度 

分 类 号：TQ175.732[化学工程—硅酸盐工业]