用30mm磁选柱对攀钢选矿厂粗精矿进行实验室试验。结果表明 ,通过对粗精矿分级选别 ,取得了良好的指标 :粗精矿铁品位由 46 89%提高到 5 3 40 % ,回收率达 93 91%。建议进行半工业或工业试验进一步验证磁选柱分选的效果 ,并进行经济效益分析 With  30mm magnetic separation column of Panzhihua Iron and Steel Concentrator ore concentrate laboratory test. The results show that good grade is obtained by grading and classifying coarse ore concentrate: the grade of concentrate concentrate increases from 46 89% to 53 340%, and the recovery rate reaches 93 91%. Proposed semi-industrial or industrial test to further verify the effect of magnetic separation column, and economic analysis