球磨机中低品位铝土矿的选择性磨矿研究  

Selective Grinding of Low Grade Bauxite in Ball Mill Grinding

作　　者：朱一民[1] 韩跃新[1] 王泽红[1] 田祎兰[1] 

机构地区：[1]东北大学

出　　处：《金属矿山》2009年第6期60-63,87,共5页Metal Mine

基　　金：国家"973计划"项目(编号:2005CB623701)

摘　　要：以铝硅比为4.4的河南长城铝业公司一水硬铝石型铝土矿为研究对象,采用Φ100mm×150mm球磨机对其进行了选择性磨矿试验研究。研究结果表明:在磨矿细度为-74μm占50%左右时,铝土矿的选择性磨矿效果较好;较大的料球比有利于改善选择性磨矿效果;提高磨矿浓度对磨矿产品的粒度组成影响不大,但对磨矿产品中各粒级的铝硅比分布影响较大。在本试验所采用的介质充填率和介质配比下,当料球比为1.2,磨矿浓度为70%,磨矿细度为-74μm占53.58%时,磨矿产品中+0.18mm粗粒级的铝硅比达到7.5以上,其产率为27%,Al2O3回收率为30%。The selective grinding of diasporic bauxite with a 4.4 ratio of Al2O3 to SiO2 from Henan Great Wall Aluminum Co. in a Ф 100 mm×150 mm ball mill was investigated. The results show that,at a grinding size of 50% -74 μm, its selective grinding effect is good, high material-ball ratio is benefit to vary grinding effect and the grinding concentration has little impact on the product size composition but high impact on the ratio of Al2O3 to SiO2 of each size fraction of the product. With the grinding mediums filling ratio and medium size composition used in this test, at a material-ball ratio of 1.2, a 70% grinding concentration and grinding size of 50% - 74 μm, in the course size fraction of the product, the ＋ 0. 18 mm Al2O3-SiO2 ratio is greater than 7.5, the yield of the fractions is 27% and the Al2O3 recovery is 30%.

关 键 词：球磨机 铝土矿 选择性磨矿 铝硅比 

分 类 号：TD453[矿业工程—矿山机电] TF821[冶金工程—有色金属冶金]