甘肃某混合氧化铁矿选矿试验研究

对某矿山代表性矿样进行了矿石性质及选矿工艺试验研究, 进行了单一磁选、焙烧-磁选、磁选-反浮选、焙烧-磁选-反浮选等方案对比。结果表明, 焙烧-磁选-反浮选能获得合格铁精矿, 在最终磨矿细度-0.037 mm粒级占75%时, 对品位32.50%的原矿经过三段磁选、三段浮选, 可获得精矿铁品位59.94%、铁回收率72.84%、尾矿品位16.13%的选别指标, 精矿中主要杂质SiO₂含量8.47%。

Beneficiation Experiment for Mixed Oxidized Iron Ores from Gansu Province

The properties of the representative ore sample from an iron mine were investigated, and the mineral processing experiments were carried out by comparing schemes including single magnetic separation, roasting-magnetic separation, magnetic separation-reverse flotation and roasting-magnetic separation-reverse flotation. The results show that, a qualified iron concentrate can be obtained using the roasting-magnetic separation-reverse flotation scheme. With the final grinding fineness at -0.037 mm 75%, the raw ore with the grade at 32.50% is subjected to reduction roasting, three stages of magnetic separation and three stages of flotation, resulting in the obtained iron concentrate grading 59.94% Fe at 72.84% recovery and the tailings grading 16.13% Fe, with the main impurity SiO₂ in the concentrate just around 8.47%.