氧化铁矿物是弱磁性矿物,其磁化率在25～1100×10~(-6)电磁单位/厘米~3之间。各主要铁矿物的物理性质和化学组成列于表1。表1 主要铁矿物的物理性质和化学组成原则上,氧化铁矿物都可用强磁选法与无磁性的或磁性极弱的脉石矿物(如硅石)分开。然而自二十年代发明强磁选机(Dings感应辊式磁选机)以来,过了半个世纪,氧化铁矿石的 Iron oxide minerals are weak magnetic minerals, the magnetic susceptibility of 25 ~ 1100 × 10 ~ (-6) electromagnetic units / cm ~ 3 between. The physical properties and chemical composition of the major iron minerals are listed in Table 1. Table 1 Physical properties and chemical composition of the main iron minerals In principle, iron oxide minerals can be separated by strong magnetic separation from non-magnetic or very weak gangue minerals such as silica. However, since the invention of the strong magnetic separator (Dings induction roller magnetic separator) in the 1920s, over half a century, the iron oxide