青海某微细粒嵌布磁铁矿选矿试验研究

为开发利用青海某微细粒嵌布磁铁矿，对其进行了选矿试验研究。试验结果表明：采用单一磁选工艺，即使将矿石细磨至-500目95%，也不能使精矿铁品位达到60%以上。而采用磁选-反浮选联合工艺，在最终磨矿细度为-400目80%时，可获得精矿品位为60.11%，铁回收率为60.20%的选别指标；在最终磨矿细度为-400目95%时，可获得精矿铁品位为67.42%，铁回收率为56.92%的选别指标。

Experiment Study on the Beneficiation of a Micro-fine Magnetite Ore from Qinghai

To exploit and utilize a micro-fine magnetite ore from Qinghai, beneficiation tests were made on it. The results show that adoption of single magnetic separation can not obtain an iron concentrate grade of over 60% even if the ore is ground to 95%-500 mesh. The combined process of magnetic separation and reverse flotation can obtain an iron concentrate grading 60.11% at a recovery of 60.20%at a final grinding size of 80% -400 mesh, and an iron concentrate grading 67.42% at a recovery of 56.92% at a final grinding size of 95% -400 mesh.