新疆哈密某铁矿石选矿探索试验
Modern Mining(2020)
Abstract
新疆哈密某铁矿石中主要金属矿物为磁铁矿,少量赤铁矿,磁性铁占总铁的80.42%;磁铁矿的嵌布粒度在0.04~1 mm,主要在0.1~0.65 mm,嵌布粒度较粗.为了确定矿石的选矿工艺进行了选矿试验.试验结果表明,原矿在粗磨细度为-0.071 mm占55%,弱磁粗选磁场强度为95.54 kA/m,粗精矿再磨细度为-0.071 mm 65%,弱磁精选磁场强度为63.69 kA/m的情况下,可获得铁品位65.40%、铁回收率78.08%的铁精矿;干式磁选抛尾试验结果表明,该矿石的干式抛尾效果比较显著,可以抛去产率为27.69%的干式粗粒尾矿,可将入磨铁品位由34.07%提高至42.80%,铁回收率达90.82%.基于矿石干抛效果较理想,因此,矿石在进入磨选作业前宜增设磁选干抛作业.
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