某鲕状赤铁矿循环流化床焙烧-磁选试验研究

采用实验室循环流化床装置，以CO与N2的混合气体和电加热方式模拟燃煤还原焙烧气氛，对铁品位为47.20%的鄂西某鲕状赤铁矿进行磁化焙烧-弱磁选试验，结果表明，在合适的焙烧温度、焙烧时间、焙烧气氛、气体流量、磁场强度及-325目占80%的最终磨矿细度下，经过循环流化床焙烧-阶段磨矿-一粗一精两段弱磁选，可获得精矿铁品位为56.60%，对焙烧矿铁回收率为77.79 %的较好选别指标。

Experiments on Roasting Technology Magnetic Separation of Oolitic Hematite Ore by the Circulating Fluidized Bed

Experiments of magnetizing roasting and low intensity magnetic separation on the oolitic hematite(TFe 47.20%) in the west of Hubei were carried out by simulating the condition of coal-burning reduction roasting by heating with mixture of CO and N2 and electricity.The results showed that at suitable roasting temperature,roasting time,roasting atmosphere,gas flow and magnetic intensity and the final grinding at-325 mesh 80%,a good concentrate grading of 56.60% at a 77.79% recovery can be obtained by the proce...