新疆某选铜尾矿中铁回收试验

新疆某铜铁矿经浮选选铜后,尾矿铁品位在26%左右,由显微镜、X射线衍射分析可知金属矿物主要为赤铁矿(实际为镜铁矿),少量黄铁矿、黄铜矿、铜蓝、辉铜矿、褐铁矿等。为解决现行强磁选回收该铁资源利用率低的问题,进行了磁化焙烧-磁选工艺研究,将原矿中弱磁性的赤铁矿还原为强磁性的磁铁矿,再采用弱磁选获得了品位为58.78%,回收率89.00%的高品质的铁精矿。对实现尾矿的资源化利用,减少尾矿堆放对环境的污染有重要意义。

Tests on Iron Recovery for a Xinjiang Copper Tailing

The iron grade of one Xinjiang copper flotation tailings reaches up to 25%, by a microscopic, X-ray diffraction analysis shows that metal minerals are hematite (actual specularite), a small amount of pyrite, chalcopyrite, covellite, chalcocite, limonite, etc.. In order to utilize the resource, one enterprise has used high intensity magnetic separation to recover iron minerals. For solving the problem low resource efficiency, reducing roasting-magnetic separation test was finished, then weak magnetic hematite was reduced to high magnetic magnetite. The iron concentrate grade of 58.78% at iron recovery 89.00% was obtained by low magnetic separation. The research has important significance on reclamation of the tailings and reducing environmental pollution due to tailing stack.