CA2合成原料对刚玉浇注料性能的影响  

Effects of CA2 composites on properties of corundum castables

作　　者：陈登锋 张三华[1] Chen Dengfeng;Zhang Sanhua

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

出　　处：《耐火材料》2020年第1期47-51,共5页Refractories

摘　　要：为探讨CA2制品在铝工业中应用的可能性,在以电熔白刚玉、活性α-Al 2O 3微粉、Secar 71水泥、硅微粉为基础配方的刚玉浇注料中,采用CA2骨料、细粉取代同粒径的电熔白刚玉,研究CA2加入量(其质量分数分别为0、15%、35%、55%、88%)对浇注料性能的影响。结果表明:随着CA2加入量增加,试样的体积密度降低,显气孔率升高,线膨胀系数和热导率降低;添加CA2的试样经110℃烘干后的强度最高,随着热处理温度升高,试样强度下降;适量的CA2可以显著改善浇注料的抗热震性;CA2能够显著改善浇注料的抗熔融铝合金侵蚀性能,试样的侵蚀率随CA2加入量的增加而降低。In order to explore the possibility of CA 2 products application in aluminum industry,CA 2 aggregates and fines were used to replace the white fused corundum with the same particle size in the basic formulation of corundum castables(white fused corundum,reactiveα-Al 2O 3 micropowder,Secar 71 cement,and microsilica).Effects of the CA 2 additions(0,15%,35%,55%and 88%,by mass)on the properties of the castables were researched.The results show that with the CA 2 addition increasing,the bulk density,the linear expansion coefficient and the thermal conductivity decrease,but the apparent porosity increases;the strength of the specimens added with CA 2 after drying at 110℃is the highest,and the strength decreases with the heat treating temperature rising;a suitable addition of CA 2 can significantly improve the thermal shock resistance of the castables;CA 2 can significantly improve the corrosion resistance of the corundum castables to molten aluminum alloy,and the corrosion rate decreases with the CA 2 addition increasing.

关 键 词：二铝酸钙 线膨胀系数 抗热震性 抗熔融铝合金侵蚀 

分 类 号：TQ175[化学工程—硅酸盐工业]