Low-grade Fe-Mn ore pyrogenic process beneficiation method

The invention discloses a low-grade Fe-Mn ore pyrogenic process beneficiation method. The low-grade Fe-Mn ore pyrogenic process beneficiation method comprises the steps that fine Fe-Mn ore, fine ground limestone and quick lime are subjected to ore blending, mixing and agglomeration, obtained blocks are dried and then subjected to two-stage roasting, and roasted blocks are obtained; and the roastedblocks are subjected to levigating and magnetic separation, magnetic concentrate with a low gangue content and especially low contents of harmful elements of lead, phosphorus and other elements is obtained, and the magnetic concentrate can serve as a quality raw material for smelting a Mn alloy. The low-grade Fe-Mn ore pyrogenic process beneficiation method is especially suitable for the Fe-Mn ore in which the lead, the phosphorus and other harmful elements and Fe and manganese mineral are in tight paragenesis and isomorphism. 本发明公开了种低品位铁锰矿火法选矿方法，该方法是将细粒铁锰矿、细磨石灰石和生石灰进行配矿、混合造块，所得团块经过干燥后，进行两段焙烧，得到焙烧团块；所述焙烧团块经过磨细、磁选，得到脉