某含锰赤铁矿石焙烧—弱磁选—强磁选试验

Experiment of Roasting-Low Intensity Magnetic Separation-High Intensity Magnetic Separation Technology of a Manganese-Bearing Hematite Ore

针对某赤铁矿石中褐锰矿含量较高的特点,通过磁化焙烧将赤铁矿还原为磁铁矿,然后采用弱磁选将铁与锰及脉石分离,并对弱磁选尾矿进行强磁选富集回收锰矿物,取得了铁精矿产率为71.32%、铁品位为64.18%、铁回收率为94.79%,锰精矿产率为13.78%、锰品位为27.98%、锰回收率为79.45%的试验指标,使铁和锰得到了较好的综合回收。

According to the characteristics of a hematite with high content braunite,first reduced the hematite to artificial magnetite by magnetizing roasting,then separated the iron with manganese and gangue by low intensity magnetic separation,recovered the manganese minerals from low intensity magnetic separation tailings by high intensity magnetic separation.The experiment results got the iron concentrate with yield 71.32%,iron grade 64.18%,iron recovery 94.79%,manganese concentrate with yield 13.78%,manganese grade 27.98%,manganese recovery 79.45%.Iron and manganese are comprehensively recovered.