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根据东大山铁矿选厂尾矿的性质，进行了尾矿再选的研究。实践表明：采用ＨＳ型磁力回收机，能提高回收率０．９个百分点，降低尾矿品位０．２４％百分点，具有一定的经济效益。
According to the nature of Tungshan Iron Mine tailings, tailings re-election of the study. Practice shows that: the use of HS-type magnetic recovery machine, can increase the recovery rate of 0.9 percentage points, 0.24% lower tailings grade, with some economic benefits.