中文摘要：

为了优化纯铝酸钙水泥结合刚玉一尖晶石浇注料的性能，分别用6-3、3-1和1-0.5mm的六铝酸钙（CA6）颗粒替代浇注料中相应粒度的板状刚玉颗粒，研究其对浇注料强度、致密度、烧后线变化和抗热震性的影响。结果表明：1）用CA6颗粒替代板状刚玉颗粒后，试样的常温强度、高温强度、抗热震性、1550℃烧后线变化均增大，并且其增大幅度基本上随CA6颗粒粒度的减小而增大。2）用6-3mm的CA6颗粒替代板状刚玉颗粒，试样的体积密度减小，显气孔率增大；但随着CA6颗粒粒度从6—3mm逐渐减小至1—0.5mm，试样的体积密度逐渐增大，显气孔率逐渐减小。

英文摘要：

Calcium hexaluminate aggregates （CA6 ,6 - 3,3 - 1 and 1 - 0..5 mm） were used to replace the tabular corundum aggregates with corresponding particle size in corundum-spinel castables in order to optimize the performance of the castables. Effects of calcium hexaluminate aggregates on the strength, density,linear change on heating （1 550 ℃） and thermal shock resistance of the castables were studied. The results show that. after replacement, （ 1 ） the cold strength, hot strength,thermal shock resistance and linear change on heating increase, and the increasing amplitude basically increases with the decrease of calcium hexaluminate particle size; （2）for the castables with 6 -3 mm CA6 aggregates,the bulk density decreases and the apparent porosity increases, however, as CA6 decreases from 6 - 3 mm to 1 - 0.5 ram, the bulk density increases and the apparent porosity decreases gradually.