摘要：以氧化铝与氧化硅的质量比为 4.4 的铝土矿为研究对象，采用振 动磨机对铝土矿进行了选择性磨矿试验研究。 结果表明： 磨矿浓度为 70%（质量分数）时，磨矿产品粗粒级的氧化铝与氧化硅的质量比较高， 选择性较好；料球比为 0.9 时，其选择性磨矿效果较好；湿式磨矿较干 式磨矿的选择性效果更好；在此最适宜条件下，磨矿产品中大于 0.23 mm 的粗粒级氧化铝与氧化硅的质量比可达到 7.5 以上， 产率为 25%， Al₂O₃ 回收率为 27%，说明对低品位铝土矿选择性粉碎脱硅是可行的。 

关键词：振动磨机；铝土矿；选择性磨矿

Abstract：The selective grinding in vibration mill on bauxite with low ratio of Al₂O₃ and SiO₂ （4.4） was studied. The results showed that the effect of selective grinding of bauxite was better when the pulp concentration was 70% and the grinding materials to charge ratio was 1.2. The optimal grind ing conditions of the ball mill with bauxite were：grinding materials to charge ratio， 1.2； pulp concentration， 70%， wet milling. Under the condi tions， the rate of ground product with ratio of Al₂O₃ and SiO₂ over 7.5 was 27% and the recovery of Al₂O₃ was 30%. It was demonstrated to be feasible to desilicate bauxite with low grade by selective grinding. 

Keyword：ball mill；bauxite；selective grinding