某极贫磁铁矿石选矿工艺试验

Beneficiation Process Test of a Lean Magnetic Ore

河北某低品位磁铁矿石全铁含量为14.60%,磁性铁为7.81%,为合理利用该资源,分别采用湿式预选—阶段磨矿—全磁选工艺流程和粗粒湿式预选—阶段磨矿—细筛—阶段弱磁选流程就矿石中磁铁矿的回收进行了选矿试验。试验分别获得了铁品位为66.19%、铁回收率为53.34%和铁品位为66.14%、铁回收率为53.40%的铁精矿,根据试验结果最终推荐湿式预选—阶段磨矿—细筛—阶段弱磁选流程为合理利用该极贫磁铁矿切实可行的选别流程。

There is 14. 60% iron,7. 81% magnetic iron in a low grade magnetite ore of Hebei province. In order to utilize the resources,wet preconcentration—stage grinding—full magnetic separation and wet preconcentration for coarse particles—stage grinding—fine sieve—stage low intensity magnetic separation process are conducted separately to recovery magnetite from the ore. Iron concentrate with 66. 19% iron and recovery of 53. 34%,and 66. 14% iron and recovery of 53. 40% is obtained separately. Wet preconcentration—stage grinding—fine sieve—stage low intensity magnetic separation process is finally recommended as the reasonable operation for develop the very lean magnetite ore.