摘要
内蒙古某铁矿石铁品位52.86%,SiO2含量17.81%,碱金属总量1.34%,由于碱金属含量过高,无法满足烧结及高炉和后续要求,本文通过选矿试验探寻该矿石脱除碱金属的方法。试验结果表明+15mm块矿经过焙烧磁选反浮选,-15mm粉矿经过强磁选可以有效降低矿石中的碱金属含量,并且可以保证铁的回收率及SiO2的含量。
The iron grade of a kind of the Mongolia iron ore is 52.86%, 17.81%SIO2 content, and total alkali metals content is 1.34%.The alkali metals content is too high to meet the subsequent requirements of sintering and blast furnace. This article explores a removing alkali metals method by mineral processing. The results shows that roasting reverse flotation of ＋15mm lump ore and high intensity magnetic separation of -15mm powder ore can reduce the alkali metal content of the ore effectively, and ensure the recovery of iron and SiO2 content.
关键词
碱金属
焙烧
磁选
反浮选
alkali metals
roasting
magnetic separation
reverse flotation
