粗粒干式磁选(磁滑轮)在磁铁矿类型选厂生产中已得到应用。它对于抛弃部分尾矿,恢复地质品位和提高入选品位,或直接得到入炉富矿有很好的效果。唯在实验室条件下进行磁铁矿选矿试验时,由于设备或试样等方面原因,其应用尚不十分广泛。近几年,我室承担的几个铁矿选矿试验, Coarse magnetic dry magnetic separation (magnetic pulley) in the magnetite type dressing plant has been applied. It is good for abandoning part of the tailings, restoring the geological grade and improving the selected grade, or directly into the furnace rich ore. Only in laboratory conditions for magnetite dressing test, due to equipment or sample and other reasons, its application is not yet very wide. In recent years, our laboratory to undertake several iron ore dressing test,