从内蒙古某高硫铁尾矿中回收铁的研究  

Recovery of Iron from High-pyrite Tailings of a Pyrite Ore in Inner Mongolia

作　　者：刘占华[1] 孙体昌[1] 孙昊[1] 李永利[1] 许言[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083

出　　处：《矿冶工程》2012年第1期46-49,共4页Mining and Metallurgical Engineering

摘　　要：内蒙古某硫铁矿属以硫为主、伴生低品位铜锌的复杂硫化矿石,经浮选流程产生了铁品位为17.75%、硫含量为5.87%的高硫铁尾矿。针对此高硫铁尾矿进行了磁选、摇床、磁选-反浮选和直接还原焙烧-磁选等一系列提铁降硫的探索试验研究。结果表明,采用常规选矿方法很难达到理想的分选效果;而采用直接还原焙烧-磁选方法可获得铁品位为93.57%、硫含量为0.39%、对弱磁精矿的回收率为82.01%的直接还原铁产品,为有效提高资源综合利用率提供了新的途径。High-pyrite tailings with an iron grade of 17.75% and a sulfur content of 5.87% was generated in the flotation process to recover a pyrite ore from Inner Mongolia, which belongs to a complex sulfide ore with pyrite associated with low-grade copper and zinc. To treat this tailings , series of exploratory tests on iron-increasing and sulfur-reduction were carried out adopting processes of magnetic separation, shaking table, magnetic separation-reverse flotation, and direct reduction roasting-magnetic separation. It shows that it is difficult to obtain an ideal separation index with conventional beneficiation methods, while an iron concentrate with an iron grade of 93.57%, a sulphur content of 0. 39% and a recovery of the concentrate from low intensity magnetic separation of 82.01%, can be obtained using the method of direct reduction roasting-magnetic separation, which proposed a new approach to effectively improve the comprehensive utilization of resources.

关 键 词：高硫铁尾矿 磁选 直接还原焙烧 硫铁矿 

分 类 号：TD92[矿业工程—选矿]