二氧化硅微粉种类对Al2O3-SiC-C质铁沟浇注料性能的影响
Effect of Different Types of Micro-Silica on Properties of Al2O3-SiC-C Iron Ditch Castable
曹壮 1贾庆伟 1张军1
作者信息
- 1. 中钢集团洛阳耐火材料研究院有限公司,河南 洛阳 471039
- 折叠
摘要
为提高Al2O3-SiC-C质铁沟浇注料性能,以棕刚玉、致密刚玉、活性氧化铝微粉、球沥青、金属硅等为主要原料,以纯铝酸钙水泥为结合剂,添加几种粒度分布、化学组成等均不相同的二氧化硅微粉(1#SiO2、2#SiO2、3#SiO2),研究其对浇注料性能的影响.结果表明:添加3#SiO2微粉的试样成型所需加水量较大,试样的体积密度最小,显气孔率最高,抗氧化性最差,经1 450℃热处理3h后永久线变化率较低;添加1#SiO2微粉试样和2#SiO2微粉试样的体积密度和显气孔率均相当;添加1#SiO2微粉试样的高温抗折强度最低,添加2#SiO2微粉试样的抗渣性能最好;添加2#SiO2微粉试样的综合性能最好.
Abstract
In order to improve the performance of Al2O3-SiC-C iron ditch castable,using brown corundum,dense corundum,activated alumina powder,ball pitch,silicon as main raw materials,calcium aluminate cement as the binder,several kinds of micro-silica(1#SiO2,2#SiO2,3#SiO2)with different particle size distribution and chemical composition are added to study their effects on the properties of castable.The results show that the sample with 3#SiO2 micro-powder requires a large amount of water for molding,with the smallest bulk density,the highest apparent porosity,and the worst oxidation resistance;after heat treatment at 1 450℃for 3 h,the permanent linear change rate is low.The bulk density and apparent porosity of the samples with added 1#SiO2 micro-powder and 2#SiO2 micro-powder are equivalent.The hot modulus of rupture of the sample with added 1#SiO2 micro-powder is the lowest,while the slag resistance of the sample with 2#SiO2 micro-powder is the best;the comprehensive performance of the sample with added 2#SiO2 micro-powder is the best.
关键词
Al2O3-SiC-C铁沟浇注料/二氧化硅微粉/强度/抗氧化/抗渣性Key words
Al2O3-SiC-C iron ditch castable/micro-silica/strength/oxidation resistance/slag resistance引用本文复制引用
出版年
2024
NETL
NSTL
万方数据