摘要：为了探讨耐火材料制品的密堆积结构特性,从而获得较好的颗粒堆积密度,研究了圆锥破碎机制得的粗、细两种离散颗粒体系的自由堆积密度变化．研究结果表明：当粗、细两种颗粒组分的拉径比大于5、且粗颗粒的质量分数在60%～70%之间时,体系的自由堆积密度较大；当粗、细两种颗粒的粒径比小于5、且无细粉存在时,离散颗粒体系的自由堆积密度变化不大。

关键词：离散颗粒；自由堆积密度；粒径比

Abstract :The freeness packing density changes of disperse particles system with coarse and fine particles made by roundish wimble crusher were researched to discuss the character of dense packing structure of refractory products and to obtain the better particle packing density. The results showed that the freeness packing density was great when the diarneter rate of coarse and fine particles was more than 5 and the mass raction of coarse particles was 60% ~70%. When the diameter rate of coarse and fine particles was less than 5 and there was not any fine particle. the changes of freeness packing density were smooth.

Keywords: disperse particles system ; freeness packing density; rate of particle diameter