根据白云鄂博铁矿床含元素多,矿物种类多,嵌布粒度细,可选性相近等特点,我所于1976年研制了一台φ1080×620永磁多级针布介质中磁机。先后在包钢选矿厂选矿车间进行了半工业选铁试验,在我所选矿连续试验间和包钢选矿厂重选车间进行了稀土精矿脱铁试验,均取得了较好的效果。 According to the characteristics of the Bayan Obo iron ore deposit containing many elements, many mineral species, fine grain size, and similar selectivity, we developed a φ1080 × 620 permanent magnet multi-level needle cloth medium magnetic machine in 1976. The semi-industrial iron selection test was carried out in the dressing workshop of Baogang Concentrator. The tests of desulphurization of rare earth concentrates were carried out in the continuous tests of the selected orebodies and in the re-selection workshop of the Baotou Steel Concentrator. All achieved good results.