龙烟鲕状赤铁矿石选矿试验研究

龙烟矿区宣龙式鲕状赤铁矿石的鲕粒由粒度为0.005～0.001 mm的隐晶质赤铁矿构成，赤铁矿中的铁占到总铁量的96.19%，有害元素S、P含量低。以工艺流程简洁、能耗低、可操作性强为目标，研究了该矿石的开发利用方案。结果表明，采用还原焙烧-磨矿-弱磁粗选-粗精矿再磨-弱磁精选流程处理，可获得铁品位62.46%、回收率83.56%的铁精矿。

Experimental Study of the Beneficiation of Longyan Oolitic Hematite Ore

Xuanlong-type oolitic hematite consists of aphanitic hematite with particle size of 0.005 ~ 0.001 mm, and iron element in hematite accounts for 96.19% of the total iron, and the contents of harmful elements S , P are low. The exploitation scheme for the ore is investigated to find out a process with feature of simple process, low energy consumption and good operability as a goal. The results show that iron concentrate with Fe grade of 62.46% and recovery rate of 83.56% was achieved by adopting the process of reduction roasting-grinding-rough low intensity magnetic separation-regrinding of rough concentrate-cleaning of low intensity magnetic separation.