二氧化硅微粉种类对Al_(2)O_(3)-SiC-C质铁沟浇注料性能的影响  

Effect of Different Types of Micro-Silica on Properties of Al_(2)O_(3)-SiC-C Iron Ditch Castable

作　　者：曹壮 贾庆伟 张军[1] CAO Zhuang;JIA Qingwei;ZHANG Jun(Sinosteel Luoyang Institute of Refractories Research Co.,Ltd.,Luoyang 471039,China)

机构地区：[1]中钢集团洛阳耐火材料研究院有限公司,河南洛阳471039

出　　处：《工业炉》2024年第3期50-55,共6页Industrial Furnace

摘　　要：为提高Al_(2)O_(3)-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^(#)SiO_(2)、2^(#)SiO_(2)、3^(#)SiO_(2)),研究其对浇注料性能的影响。结果表明:添加3^(#)SiO_(2)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3 h后永久线变化率较低;添加1^(#)SiO_(2)微粉试样和2^(#)SiO_(2)微粉试样的体积密度和显气孔率均相当;添加1^(#)SiO_(2)微粉试样的高温抗折强度最低,添加2^(#)SiO_(2)微粉试样的抗渣性能最好;添加2^(#)SiO_(2)微粉试样的综合性能最好。In order to improve the performance of Al_(2)O_(3)-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^(#)SiO_(2),2^(#)SiO_(2),3^(#)SiO_(2))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^(#)SiO_(2)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 1450℃for 3 h,the permanent linear change rate is low.The bulk density and apparent porosity of the samples with added 1^(#)SiO_(2)micro-powder and 2^(#)SiO_(2)micro-powder are equivalent.The hot modulus of rupture of the sample with added 1^(#)SiO_(2)micro-powder is the lowest,while the slag resistance of the sample with 2^(#)SiO_(2)micro-powder is the best;the comprehensive performance of the sample with added 2^(#)SiO_(2)micro-powder is the best.

关 键 词：Al_(2)O_(3)-SiC-C铁沟浇注料 二氧化硅微粉 强度 抗氧化 抗渣性 

分 类 号：TQ175.12[化学工程—硅酸盐工业]