本文研究的铝土矿除铁方法,包括以下四个过程:原矿细磨、焙烧、用还原气体将铝土矿中的弱磁性针铁矿和赤铁矿还原成强磁性的磁铁矿和金属铁,然后磁选除铁。原矿取自亚拉巴马铝土矿矿床,含Fe_2O_3 2.7％。经过以上处理,可获得含Fe_2O_3 1.5％,回收率为95％的除铁铝土矿产品,磁性产品含Fe_2O_3 21％。试验中,焙烧和H_2还原的温度均用800℃。一次磁选,磁选机的磁场强度为4000Gs。 This paper studies the bauxite iron removal method, including the following four processes: fine ore grinding, roasting, the reduction of the gas with a weak bauxite goethite and hematite weak magnetite and metal reduction Iron, then magnetic separation of iron. The ore was taken from the Alabama bauxite deposit containing 2.7% Fe_2O_3. After the above treatment, 1.5% Fe_2O_3 can be obtained, the recovery rate of 95% iron removal bauxite products, magnetic products containing Fe_2O_3 21%. In the experiment, the temperature of roasting and H2 reduction is 800 ℃. A magnetic separation, magnetic separator magnetic field strength 4000Gs.