从精矿性质特点着手，分析了酒钢选厂焙烧磁选精矿铁品位不高的原因和主要影响因素。
Accortling to the characteristics of concentrate, the authors analyse the reasons why the iron grade of roasted magnetic separation concentrate is not high.
对东山选厂采用阶段磨选工艺改造，增加圆筒筛和一段磁选设备。
Dongshan concentrator has been transformed to the stage grinding and stage magnetic separation technological flowsheet by adding the trommel screens and low intensity magnetic separator.
工业应用和试验表明，这些新型高效磁选设备对于提高选厂的选矿效率，增加企业经济效益起了重要作用。
It shows that these new type high efficiency drum magnetic separators play an important role in improving mineral processing efficiency and economic benefit.
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