难选赤褐铁矿焙烧-磁选试验研究

    EXPERIMENTAL STUDY ON MAGNETIC ROASTING-SEPARATION OF REFRACTORY HEMATITE LIMONITE

    • 摘要: 对某含铁品位为45%、磁性率(FeO/TFe)为2.7%的难选赤褐铁矿矿石进行了选矿试验研究,考查了该矿石的矿物工艺学和磨矿特性,重点研究了强磁选、还原焙烧-磁选分选情况,确定还原焙烧-磁选可以获得较好的选别指标为:精矿铁品位达60%以上,产率达85%以上,铁回收率90%以上,尾矿铁品位下降到15%以下。

       

      Abstract: In this paper, test of mineral processing were finished on the refractory hematite limonite of Shanxi with iron content about 45%, rate of magnetism(FeO/TFe) about 2.7%. Grindability and technique of mineralogy of this iron ore were described. The major study were put attention on efficiency of magnetic separation at high intensity and reducing roasting-magnetic separation. Tests of reducing roasting-magnetic separation could attained good results as:concentrate iron grade be about to 60%, productivity above 85%, recovery of iron above 90%, iron grade of tails under 15%.

       

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