微细粒磁-赤铁矿超细碎-干式预选新技术研究
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摘要
研究了微细粒磁-赤铁矿超细碎-干式预选技术。结果表明,当粒度为-5 mm,磁辊磁感应强度0.3 T,线速度为0.48 m/s时,干式预选尾矿产率为27.60%、铁品位12.35%、磁性铁含量为0.60%,干式预选精矿产率为72.40%,铁品位由25.65%提高至30.60%。
An ultrafine crushing-dry preconcentration flowsheet was introduced to upgrade fine magnetite-hematite ore. After smashed to-5 mm, the ore was processed by a dry magnetic separation with the roller surface magnetizing induction intensity at 0.3 T and the roller rotating linear velocity at 0.48 m/s, which yielded 72.40% dry pre-enrichment concentrate, with Fe grade increased from 25.65% to 30.60%, and resulted in the obtained tailings graded 12.35% Fe, with magnetic iron therein at the content of 0.60%.
An ultrafine crushing-dry preconcentration flowsheet was introduced to upgrade fine magnetite-hematite ore. After smashed to-5 mm, the ore was processed by a dry magnetic separation with the roller surface magnetizing induction intensity at 0.3 T and the roller rotating linear velocity at 0.48 m/s, which yielded 72.40% dry pre-enrichment concentrate, with Fe grade increased from 25.65% to 30.60%, and resulted in the obtained tailings graded 12.35% Fe, with magnetic iron therein at the content of 0.60%.
引文
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[2] 刘龙.进口铁矿石价格变化对中国钢铁产业发展的影响分析[J].特区经济,2015(4):118-119.
[3] 张艳飞.2015～2040年全球铁矿石供需趋势分析[J].资源科学,2015(5):922-932.
[4] 张丛香,刘双安,钟刚.一种混合铁矿石磁-赤矿分选、焙烧磁选新技术研究[J].矿冶工程,2018,38(5):65-67.
[5] 胥利辉.马坑铁矿细粒干抛工艺改造实践[J].现代矿业,2014(1):156-157.
[6] 马艺闻.内蒙古大坝沟超贫磁铁矿石选矿试验[J].金属矿山,2014(6):65-68.
[7] J Svoboda.Development in Mineral Processing[M].Elsevier Science Publishers,1987.
[8] Sunil Kumar Tripathy,P K Banerjee,Nikkam Suresh.Separation analysis of dry high intensity induced roll magnetic separator for concentration of hematite fines[J].Powder Technology,2014(264):527-535.
[9] 刘志兴.SA-2絮凝剂在微细粒赤铁矿分选中的应用[J].有色金属(选矿部分),2013(6):83-85.