SiO2微粉加入量对ρ-Al2O3结合刚玉质浇注料性能的影响  

Effect of microsilica addition on properties of ρ-Al2O3 bonded corundum castables

作　　者：王欢 王战民[1] 冯海霞[1] 焦云杰 柳军[1] 许应顺 Wang Huan;Wang Zhanmin;Feng Haixia;Jiao Yunjie;Liu Jun;Xu Yingshun(State Key Laboratory of Advanced Refractories,Sinosteel Luoyang Institute of Refractories Research Co.,Ltd.,Luoyang 471039,Henan,China)

机构地区：[1]中钢集团洛阳耐火材料研究院有限公司先进耐火材料国家重点实验室,河南洛阳471003

出　　处：《耐火材料》2021年第1期1-6,共6页Refractories

摘　　要：为了研究SiO2微粉添加量对ρ-Al2O3结合刚玉质浇注料抗爆裂性能的影响,以电熔白刚玉、ρ-Al2O3、活性α-Al2O3微粉等为主要原料,分别添加质量分数为0、1%、2%、3%、4%、5%和6%的SiO2微粉代替基质中的电熔白刚玉细粉,振动浇注成型后,分别检测其常温力学性能、透气度、孔径分布和抗爆裂温度。结果表明:随着SiO2微粉加入量的增加,试样的常温力学性能增加,脱模后和110℃烘后的透气度值逐渐降低,经1 400℃热处理后的透气度值逐渐增加,且烧后试样的整体孔径逐渐增大,抗爆裂性能则是先增加后降低。综合考虑试样的力学性能和抗爆裂性能,SiO2微粉的适宜添加量为1%~2%(w)。In order to study the effect of the microsilica addition on the resistance to explosive spalling ofρ-Al 2O 3 bonded corundum castables,white fused corundum,ρ-Al 2O 3,reactiveα-Al 2O 3 micropowder,etc.,were used as the main raw materials,adding microsilica with mass fraction of 0,1%,2%,3%,4%,5%and 6%,respectively,to replace fused white corundum fine powder in the matrix.After vibration casting,the cold mechanical properties,the air permeability,the pore size distribution and the resistance to explosive spalling temperature were tested,respectively.The results show that with the microsilica addition increasing,the cold mechanical properties of the specimens increase,the air permeability after demoulding and drying at 110℃gradually decreases,the air permeability after heat treatment at 1400℃gradually increases,the overall pore diameter increases,and the resistance to explosive spalling first increases and then decreases.In consideration of the mechanical properties and the resistance to explosive spalling,the optimal microsilica addition is 1%-2%.

关 键 词：SIO2微粉 Ρ-AL2O3 刚玉质浇注料 抗爆裂性 

分 类 号：TQ175[化学工程—硅酸盐工业]